renaming eu.siacs.conversations to de.thedevstack.conversationsplus

"renaming eu.siacs.conversations to de.thedevstack.conversationsplus" package renaming completed
author: steckbrief <steckbrief@chefmail.de> 2015-05-03 22:25:46 +0200
committer: lookshe <github@lookshe.org> 2015-06-19 09:46:40 +0200
commit: 7382e3af9769f76fe4e19934a59e45a3f9858332 (patch)
tree: c37cdb03dfaeaccde7c8dd7c79887bf0de278f83 /src/main/java/de
parent: b3b4a2902e37fb072e800f5dff0392755f5d4501 (diff)
126 files changed, 26180 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/Config.java b/src/main/java/de/thedevstack/conversationsplus/Config.java
new file mode 100644
index 00000000..2fb4f132
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/Config.java
@@ -0,0 +1,81 @@
+package de.thedevstack.conversationsplus;
+
+import android.graphics.Bitmap;
+
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+
+public final class Config {
+
+	public static final String LOGTAG = "conversations";
+
+	public static final int PING_MAX_INTERVAL = 300;
+	public static final int PING_MIN_INTERVAL = 30;
+	public static final int PING_TIMEOUT = 10;
+	public static final int CONNECT_TIMEOUT = 90;
+	public static final int CARBON_GRACE_PERIOD = 60;
+	public static final int MINI_GRACE_PERIOD = 750;
+
+	public static final int AVATAR_SIZE = 192;
+	public static final Bitmap.CompressFormat AVATAR_FORMAT = Bitmap.CompressFormat.WEBP;
+
+	public static final int MESSAGE_MERGE_WINDOW = 20;
+
+	public static final boolean UTF8_EMOTICONS = false;
+
+	public static final int PAGE_SIZE = 50;
+	public static final int MAX_NUM_PAGES = 3;
+
+	public static final int PROGRESS_UI_UPDATE_INTERVAL = 750;
+	public static final int REFRESH_UI_INTERVAL = 500;
+
+	public static final boolean NO_PROXY_LOOKUP = false; //useful to debug ibb
+	public static final boolean DISABLE_STRING_PREP = false; // setting to true might increase startup performance
+
+	public static final long MILLISECONDS_IN_DAY = 24 * 60 * 60 * 1000;
+	public static final long MAM_MAX_CATCHUP =  MILLISECONDS_IN_DAY / 2;
+	public static final int MAM_MAX_MESSAGES = 500;
+
+	public static final ChatState DEFAULT_CHATSTATE = ChatState.ACTIVE;
+	public static final int TYPING_TIMEOUT = 8;
+
+	public static final String ENABLED_CIPHERS[] = {
+		"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+		"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA384",
+		"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA256",
+		"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+		"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
+		"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
+
+		"TLS_DHE_RSA_WITH_AES_128_GCM_SHA256",
+		"TLS_DHE_RSA_WITH_AES_128_GCM_SHA384",
+		"TLS_DHE_RSA_WITH_AES_256_GCM_SHA256",
+		"TLS_DHE_RSA_WITH_AES_256_GCM_SHA384",
+
+		"TLS_DHE_RSA_WITH_CAMELLIA_256_SHA",
+
+		// Fallback.
+		"TLS_RSA_WITH_AES_128_GCM_SHA256",
+		"TLS_RSA_WITH_AES_128_GCM_SHA384",
+		"TLS_RSA_WITH_AES_256_GCM_SHA256",
+		"TLS_RSA_WITH_AES_256_GCM_SHA384",
+		"TLS_RSA_WITH_AES_128_CBC_SHA256",
+		"TLS_RSA_WITH_AES_128_CBC_SHA384",
+		"TLS_RSA_WITH_AES_256_CBC_SHA256",
+		"TLS_RSA_WITH_AES_256_CBC_SHA384",
+		"TLS_RSA_WITH_AES_128_CBC_SHA",
+		"TLS_RSA_WITH_AES_256_CBC_SHA",
+	};
+
+	public static final String WEAK_CIPHER_PATTERNS[] = {
+		"_NULL_",
+		"_EXPORT_",
+		"_anon_",
+		"_RC4_",
+		"_DES_",
+		"_MD5",
+	};
+
+	private Config() {
+
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/OtrEngine.java b/src/main/java/de/thedevstack/conversationsplus/crypto/OtrEngine.java
new file mode 100644
index 00000000..dfb64eaf
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/OtrEngine.java
@@ -0,0 +1,303 @@
+package de.thedevstack.conversationsplus.crypto;
+
+import java.math.BigInteger;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.spec.DSAPrivateKeySpec;
+import java.security.spec.DSAPublicKeySpec;
+import java.security.spec.InvalidKeySpecException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import android.util.Log;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+
+import net.java.otr4j.OtrEngineHost;
+import net.java.otr4j.OtrException;
+import net.java.otr4j.OtrPolicy;
+import net.java.otr4j.OtrPolicyImpl;
+import net.java.otr4j.crypto.OtrCryptoEngineImpl;
+import net.java.otr4j.crypto.OtrCryptoException;
+import net.java.otr4j.session.InstanceTag;
+import net.java.otr4j.session.SessionID;
+import net.java.otr4j.session.FragmenterInstructions;
+
+public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
+
+	private Account account;
+	private OtrPolicy otrPolicy;
+	private KeyPair keyPair;
+	private XmppConnectionService mXmppConnectionService;
+
+	public OtrEngine(XmppConnectionService service, Account account) {
+		this.account = account;
+		this.otrPolicy = new OtrPolicyImpl();
+		this.otrPolicy.setAllowV1(false);
+		this.otrPolicy.setAllowV2(true);
+		this.otrPolicy.setAllowV3(true);
+		this.keyPair = loadKey(account.getKeys());
+		this.mXmppConnectionService = service;
+	}
+
+	private KeyPair loadKey(JSONObject keys) {
+		if (keys == null) {
+			return null;
+		}
+		try {
+			BigInteger x = new BigInteger(keys.getString("otr_x"), 16);
+			BigInteger y = new BigInteger(keys.getString("otr_y"), 16);
+			BigInteger p = new BigInteger(keys.getString("otr_p"), 16);
+			BigInteger q = new BigInteger(keys.getString("otr_q"), 16);
+			BigInteger g = new BigInteger(keys.getString("otr_g"), 16);
+			KeyFactory keyFactory = KeyFactory.getInstance("DSA");
+			DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, p, q, g);
+			DSAPrivateKeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
+			PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);
+			PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec);
+			return new KeyPair(publicKey, privateKey);
+		} catch (JSONException e) {
+			return null;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (InvalidKeySpecException e) {
+			return null;
+		}
+	}
+
+	private void saveKey() {
+		PublicKey publicKey = keyPair.getPublic();
+		PrivateKey privateKey = keyPair.getPrivate();
+		KeyFactory keyFactory;
+		try {
+			keyFactory = KeyFactory.getInstance("DSA");
+			DSAPrivateKeySpec privateKeySpec = keyFactory.getKeySpec(
+					privateKey, DSAPrivateKeySpec.class);
+			DSAPublicKeySpec publicKeySpec = keyFactory.getKeySpec(publicKey,
+					DSAPublicKeySpec.class);
+			this.account.setKey("otr_x", privateKeySpec.getX().toString(16));
+			this.account.setKey("otr_g", privateKeySpec.getG().toString(16));
+			this.account.setKey("otr_p", privateKeySpec.getP().toString(16));
+			this.account.setKey("otr_q", privateKeySpec.getQ().toString(16));
+			this.account.setKey("otr_y", publicKeySpec.getY().toString(16));
+		} catch (final NoSuchAlgorithmException | InvalidKeySpecException e) {
+			e.printStackTrace();
+		}
+
+    }
+
+	@Override
+	public void askForSecret(SessionID id, InstanceTag instanceTag, String question) {
+		try {
+			final Jid jid = Jid.fromSessionID(id);
+			Conversation conversation = this.mXmppConnectionService.find(this.account,jid);
+			if (conversation!=null) {
+				conversation.smp().hint = question;
+				conversation.smp().status = Conversation.Smp.STATUS_CONTACT_REQUESTED;
+				mXmppConnectionService.updateConversationUi();
+			}
+		} catch (InvalidJidException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": smp in invalid session "+id.toString());
+		}
+	}
+
+	@Override
+	public void finishedSessionMessage(SessionID arg0, String arg1)
+			throws OtrException {
+
+	}
+
+	@Override
+	public String getFallbackMessage(SessionID arg0) {
+		return "I would like to start a private (OTR encrypted) conversation but your client doesn’t seem to support that";
+	}
+
+	@Override
+	public byte[] getLocalFingerprintRaw(SessionID arg0) {
+		try {
+			return getFingerprintRaw(getPublicKey());
+		} catch (OtrCryptoException e) {
+			return null;
+		}
+	}
+
+	public PublicKey getPublicKey() {
+		if (this.keyPair == null) {
+			return null;
+		}
+		return this.keyPair.getPublic();
+	}
+
+	@Override
+	public KeyPair getLocalKeyPair(SessionID arg0) throws OtrException {
+		if (this.keyPair == null) {
+			KeyPairGenerator kg;
+			try {
+				kg = KeyPairGenerator.getInstance("DSA");
+				this.keyPair = kg.genKeyPair();
+				this.saveKey();
+				mXmppConnectionService.databaseBackend.updateAccount(account);
+			} catch (NoSuchAlgorithmException e) {
+				Log.d(Config.LOGTAG,
+						"error generating key pair " + e.getMessage());
+			}
+		}
+		return this.keyPair;
+	}
+
+	@Override
+	public String getReplyForUnreadableMessage(SessionID arg0) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	public OtrPolicy getSessionPolicy(SessionID arg0) {
+		return otrPolicy;
+	}
+
+	@Override
+	public void injectMessage(SessionID session, String body)
+			throws OtrException {
+		MessagePacket packet = new MessagePacket();
+		packet.setFrom(account.getJid());
+		if (session.getUserID().isEmpty()) {
+			packet.setAttribute("to", session.getAccountID());
+		} else {
+			packet.setAttribute("to", session.getAccountID() + "/" + session.getUserID());
+		}
+		packet.setBody(body);
+		packet.addChild("private", "urn:xmpp:carbons:2");
+		packet.addChild("no-copy", "urn:xmpp:hints");
+		packet.addChild("no-store", "urn:xmpp:hints");
+
+		try {
+			Jid jid = Jid.fromSessionID(session);
+			Conversation conversation = mXmppConnectionService.find(account,jid);
+			if (conversation != null && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
+				if (mXmppConnectionService.sendChatStates()) {
+					packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
+				}
+			}
+		} catch (final InvalidJidException ignored) {
+
+		}
+
+		packet.setType(MessagePacket.TYPE_CHAT);
+		account.getXmppConnection().sendMessagePacket(packet);
+	}
+
+	@Override
+	public void messageFromAnotherInstanceReceived(SessionID session) {
+		try {
+			Jid jid = Jid.fromSessionID(session);
+			Conversation conversation = mXmppConnectionService.find(account, jid);
+			String id = conversation == null ? null : conversation.getLastReceivedOtrMessageId();
+			if (id != null) {
+				MessagePacket packet = mXmppConnectionService.getMessageGenerator().generateOtrError(jid,id);
+				packet.setFrom(account.getJid());
+				mXmppConnectionService.sendMessagePacket(account,packet);
+				Log.d(Config.LOGTAG,packet.toString());
+				Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": unreadable OTR message in "+conversation.getName());
+			}
+		} catch (InvalidJidException e) {
+			return;
+		}
+	}
+
+	@Override
+	public void multipleInstancesDetected(SessionID arg0) {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void requireEncryptedMessage(SessionID arg0, String arg1)
+			throws OtrException {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void showError(SessionID arg0, String arg1) throws OtrException {
+		Log.d(Config.LOGTAG,"show error");
+	}
+
+	@Override
+	public void smpAborted(SessionID id) throws OtrException {
+		setSmpStatus(id, Conversation.Smp.STATUS_NONE);
+	}
+
+	private void setSmpStatus(SessionID id, int status) {
+		try {
+			final Jid jid = Jid.fromSessionID(id);
+			Conversation conversation = this.mXmppConnectionService.find(this.account,jid);
+			if (conversation!=null) {
+				conversation.smp().status = status;
+				mXmppConnectionService.updateConversationUi();
+			}
+		} catch (final InvalidJidException ignored) {
+
+		}
+	}
+
+	@Override
+	public void smpError(SessionID id, int arg1, boolean arg2)
+			throws OtrException {
+		setSmpStatus(id, Conversation.Smp.STATUS_NONE);
+	}
+
+	@Override
+	public void unencryptedMessageReceived(SessionID arg0, String arg1)
+			throws OtrException {
+		throw new OtrException(new Exception("unencrypted message received"));
+	}
+
+	@Override
+	public void unreadableMessageReceived(SessionID arg0) throws OtrException {
+		Log.d(Config.LOGTAG,"unreadable message received");
+		throw new OtrException(new Exception("unreadable message received"));
+	}
+
+	@Override
+	public void unverify(SessionID id, String arg1) {
+		setSmpStatus(id, Conversation.Smp.STATUS_FAILED);
+	}
+
+	@Override
+	public void verify(SessionID id, String fingerprint, boolean approved) {
+		Log.d(Config.LOGTAG,"OtrEngine.verify("+id.toString()+","+fingerprint+","+String.valueOf(approved)+")");
+		try {
+			final Jid jid = Jid.fromSessionID(id);
+			Conversation conversation = this.mXmppConnectionService.find(this.account,jid);
+			if (conversation!=null) {
+				if (approved) {
+					conversation.getContact().addOtrFingerprint(fingerprint);
+				}
+				conversation.smp().hint = null;
+				conversation.smp().status = Conversation.Smp.STATUS_VERIFIED;
+				mXmppConnectionService.updateConversationUi();
+				mXmppConnectionService.syncRosterToDisk(conversation.getAccount());
+			}
+		} catch (final InvalidJidException ignored) {
+		}
+	}
+
+	@Override
+	public FragmenterInstructions getFragmenterInstructions(SessionID sessionID) {
+		return null;
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java
new file mode 100644
index 00000000..b7fa9585
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/PgpEngine.java
@@ -0,0 +1,369 @@
+package de.thedevstack.conversationsplus.crypto;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.util.OpenPgpApi;
+import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.http.HttpConnectionManager;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.ui.UiCallback;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.net.Uri;
+
+public class PgpEngine {
+	private OpenPgpApi api;
+	private XmppConnectionService mXmppConnectionService;
+
+	public PgpEngine(OpenPgpApi api, XmppConnectionService service) {
+		this.api = api;
+		this.mXmppConnectionService = service;
+	}
+
+	public void decrypt(final Message message,
+			final UiCallback<Message> callback) {
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
+				.getConversation().getAccount().getJid().toBareJid().toString());
+		if (message.getType() == Message.TYPE_TEXT) {
+			InputStream is = new ByteArrayInputStream(message.getBody()
+					.getBytes());
+			final OutputStream os = new ByteArrayOutputStream();
+			api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+				@Override
+				public void onReturn(Intent result) {
+					switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+							OpenPgpApi.RESULT_CODE_ERROR)) {
+					case OpenPgpApi.RESULT_CODE_SUCCESS:
+						try {
+							os.flush();
+							if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+								message.setBody(os.toString());
+								message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+								final HttpConnectionManager manager = mXmppConnectionService.getHttpConnectionManager();
+								if (message.trusted()
+                                        && Settings.DOWNLOAD_IMAGE_LINKS
+                                        && mXmppConnectionService.isDownloadAllowedInConnection()
+										&& message.bodyContainsDownloadable()
+										&& manager.getAutoAcceptFileSize() > 0) {
+									manager.createNewConnection(message);
+								}
+								callback.success(message);
+							}
+						} catch (IOException e) {
+							callback.error(R.string.openpgp_error, message);
+							return;
+						}
+
+						return;
+					case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+						callback.userInputRequried((PendingIntent) result
+								.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+								message);
+						return;
+					case OpenPgpApi.RESULT_CODE_ERROR:
+						callback.error(R.string.openpgp_error, message);
+                    }
+				}
+			});
+		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+			try {
+				final DownloadableFile inputFile = this.mXmppConnectionService
+						.getFileBackend().getFile(message, false);
+				final DownloadableFile outputFile = this.mXmppConnectionService
+						.getFileBackend().getFile(message, true);
+				outputFile.getParentFile().mkdirs();
+				outputFile.createNewFile();
+				InputStream is = new FileInputStream(inputFile);
+				OutputStream os = new FileOutputStream(outputFile);
+				api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+					@Override
+					public void onReturn(Intent result) {
+						switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+								OpenPgpApi.RESULT_CODE_ERROR)) {
+						case OpenPgpApi.RESULT_CODE_SUCCESS:
+							URL url = message.getImageParams().url;
+							mXmppConnectionService.getFileBackend().updateFileParams(message,url);
+							message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+							PgpEngine.this.mXmppConnectionService
+									.updateMessage(message);
+							inputFile.delete();
+							Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+							intent.setData(Uri.fromFile(outputFile));
+							mXmppConnectionService.sendBroadcast(intent);
+							callback.success(message);
+							return;
+						case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+							callback.userInputRequried(
+									(PendingIntent) result
+											.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+									message);
+							return;
+						case OpenPgpApi.RESULT_CODE_ERROR:
+							callback.error(R.string.openpgp_error, message);
+						}
+					}
+				});
+			} catch (final IOException e) {
+				callback.error(R.string.error_decrypting_file, message);
+			}
+
+		}
+	}
+
+	public void encrypt(final Message message,
+			final UiCallback<Message> callback) {
+
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_ENCRYPT);
+		if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
+			long[] keys = { message.getConversation().getContact()
+					.getPgpKeyId() };
+			params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
+		} else {
+			params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation()
+					.getMucOptions().getPgpKeyIds());
+		}
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
+				.getConversation().getAccount().getJid().toBareJid().toString());
+
+		if (message.getType() == Message.TYPE_TEXT) {
+			params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+
+			InputStream is = new ByteArrayInputStream(message.getBody()
+					.getBytes());
+			final OutputStream os = new ByteArrayOutputStream();
+			api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+				@Override
+				public void onReturn(Intent result) {
+					switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+							OpenPgpApi.RESULT_CODE_ERROR)) {
+					case OpenPgpApi.RESULT_CODE_SUCCESS:
+						try {
+							os.flush();
+							StringBuilder encryptedMessageBody = new StringBuilder();
+							String[] lines = os.toString().split("\n");
+							for (int i = 2; i < lines.length - 1; ++i) {
+								if (!lines[i].contains("Version")) {
+									encryptedMessageBody.append(lines[i]);
+								}
+							}
+							message.setEncryptedBody(encryptedMessageBody
+									.toString());
+							callback.success(message);
+						} catch (IOException e) {
+							callback.error(R.string.openpgp_error, message);
+						}
+
+						break;
+					case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+						callback.userInputRequried((PendingIntent) result
+								.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+								message);
+						break;
+					case OpenPgpApi.RESULT_CODE_ERROR:
+						callback.error(R.string.openpgp_error, message);
+						break;
+					}
+				}
+			});
+		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+			try {
+				DownloadableFile inputFile = this.mXmppConnectionService
+						.getFileBackend().getFile(message, true);
+				DownloadableFile outputFile = this.mXmppConnectionService
+						.getFileBackend().getFile(message, false);
+				outputFile.getParentFile().mkdirs();
+				outputFile.createNewFile();
+				InputStream is = new FileInputStream(inputFile);
+				OutputStream os = new FileOutputStream(outputFile);
+				api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+					@Override
+					public void onReturn(Intent result) {
+						switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+								OpenPgpApi.RESULT_CODE_ERROR)) {
+						case OpenPgpApi.RESULT_CODE_SUCCESS:
+							callback.success(message);
+							break;
+						case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+							callback.userInputRequried(
+									(PendingIntent) result
+											.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+									message);
+							break;
+						case OpenPgpApi.RESULT_CODE_ERROR:
+							callback.error(R.string.openpgp_error, message);
+							break;
+						}
+					}
+				});
+			} catch (final IOException e) {
+				callback.error(R.string.openpgp_error, message);
+			}
+		}
+	}
+
+	public long fetchKeyId(Account account, String status, String signature) {
+		if ((signature == null) || (api == null)) {
+			return 0;
+		}
+		if (status == null) {
+			status = "";
+		}
+		final StringBuilder pgpSig = new StringBuilder();
+		pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----");
+		pgpSig.append('\n');
+		pgpSig.append('\n');
+		pgpSig.append(status);
+		pgpSig.append('\n');
+		pgpSig.append("-----BEGIN PGP SIGNATURE-----");
+		pgpSig.append('\n');
+		pgpSig.append('\n');
+		pgpSig.append(signature.replace("\n", "").trim());
+		pgpSig.append('\n');
+		pgpSig.append("-----END PGP SIGNATURE-----");
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
+		params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
+		InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
+		ByteArrayOutputStream os = new ByteArrayOutputStream();
+		Intent result = api.executeApi(params, is, os);
+		switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+				OpenPgpApi.RESULT_CODE_ERROR)) {
+		case OpenPgpApi.RESULT_CODE_SUCCESS:
+			OpenPgpSignatureResult sigResult = result
+					.getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE);
+			if (sigResult != null) {
+				return sigResult.getKeyId();
+			} else {
+				return 0;
+			}
+		case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+			return 0;
+		case OpenPgpApi.RESULT_CODE_ERROR:
+			return 0;
+		}
+		return 0;
+	}
+
+	public void generateSignature(final Account account, String status,
+			final UiCallback<Account> callback) {
+		Intent params = new Intent();
+		params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+		params.setAction(OpenPgpApi.ACTION_SIGN);
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
+		InputStream is = new ByteArrayInputStream(status.getBytes());
+		final OutputStream os = new ByteArrayOutputStream();
+		api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+			@Override
+			public void onReturn(Intent result) {
+				switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+				case OpenPgpApi.RESULT_CODE_SUCCESS:
+					StringBuilder signatureBuilder = new StringBuilder();
+					try {
+						os.flush();
+						String[] lines = os.toString().split("\n");
+						boolean sig = false;
+						for (String line : lines) {
+							if (sig) {
+								if (line.contains("END PGP SIGNATURE")) {
+									sig = false;
+								} else {
+									if (!line.contains("Version")) {
+										signatureBuilder.append(line.trim());
+									}
+								}
+							}
+							if (line.contains("BEGIN PGP SIGNATURE")) {
+								sig = true;
+							}
+						}
+					} catch (IOException e) {
+						callback.error(R.string.openpgp_error, account);
+						return;
+					}
+					account.setKey("pgp_signature", signatureBuilder.toString());
+					callback.success(account);
+					return;
+				case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+					callback.userInputRequried((PendingIntent) result
+							.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+							account);
+					return;
+				case OpenPgpApi.RESULT_CODE_ERROR:
+					callback.error(R.string.openpgp_error, account);
+                }
+			}
+		});
+	}
+
+	public void hasKey(final Contact contact, final UiCallback<Contact> callback) {
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_GET_KEY);
+		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
+				.getJid().toBareJid().toString());
+		api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
+
+			@Override
+			public void onReturn(Intent result) {
+				switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+				case OpenPgpApi.RESULT_CODE_SUCCESS:
+					callback.success(contact);
+					return;
+				case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+					callback.userInputRequried((PendingIntent) result
+							.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+							contact);
+					return;
+				case OpenPgpApi.RESULT_CODE_ERROR:
+					callback.error(R.string.openpgp_error, contact);
+                }
+			}
+		});
+	}
+
+	public PendingIntent getIntentForKey(Contact contact) {
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_GET_KEY);
+		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
+				.getJid().toBareJid().toString());
+		Intent result = api.executeApi(params, null, null);
+		return (PendingIntent) result
+				.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
+	}
+
+	public PendingIntent getIntentForKey(Account account, long pgpKeyId) {
+		Intent params = new Intent();
+		params.setAction(OpenPgpApi.ACTION_GET_KEY);
+		params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
+		params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid().toBareJid().toString());
+		Intent result = api.executeApi(params, null, null);
+		return (PendingIntent) result
+				.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java
new file mode 100644
index 00000000..f4c3f28e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/DigestMd5.java
@@ -0,0 +1,91 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import android.util.Base64;
+
+import java.math.BigInteger;
+import java.nio.charset.Charset;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+
+public class DigestMd5 extends SaslMechanism {
+	public DigestMd5(final TagWriter tagWriter, final Account account, final SecureRandom rng) {
+		super(tagWriter, account, rng);
+	}
+
+	@Override
+	public int getPriority() {
+		return 10;
+	}
+
+	@Override
+	public String getMechanism() {
+		return "DIGEST-MD5";
+	}
+
+	private State state = State.INITIAL;
+
+	@Override
+	public String getResponse(final String challenge) throws AuthenticationException {
+		switch (state) {
+			case INITIAL:
+				state = State.RESPONSE_SENT;
+				final String encodedResponse;
+				try {
+					final Tokenizer tokenizer = new Tokenizer(Base64.decode(challenge, Base64.DEFAULT));
+					String nonce = "";
+					for (final String token : tokenizer) {
+						final String[] parts = token.split("=", 2);
+						if (parts[0].equals("nonce")) {
+							nonce = parts[1].replace("\"", "");
+						} else if (parts[0].equals("rspauth")) {
+							return "";
+						}
+					}
+					final String digestUri = "xmpp/" + account.getServer();
+					final String nonceCount = "00000001";
+					final String x = account.getUsername() + ":" + account.getServer() + ":"
+						+ account.getPassword();
+					final MessageDigest md = MessageDigest.getInstance("MD5");
+					final byte[] y = md.digest(x.getBytes(Charset.defaultCharset()));
+					final String cNonce = new BigInteger(100, rng).toString(32);
+					final byte[] a1 = CryptoHelper.concatenateByteArrays(y,
+							(":" + nonce + ":" + cNonce).getBytes(Charset.defaultCharset()));
+					final String a2 = "AUTHENTICATE:" + digestUri;
+					final String ha1 = CryptoHelper.bytesToHex(md.digest(a1));
+					final String ha2 = CryptoHelper.bytesToHex(md.digest(a2.getBytes(Charset
+									.defaultCharset())));
+					final String kd = ha1 + ":" + nonce + ":" + nonceCount + ":" + cNonce
+						+ ":auth:" + ha2;
+					final String response = CryptoHelper.bytesToHex(md.digest(kd.getBytes(Charset
+									.defaultCharset())));
+					final String saslString = "username=\"" + account.getUsername()
+						+ "\",realm=\"" + account.getServer() + "\",nonce=\""
+						+ nonce + "\",cnonce=\"" + cNonce + "\",nc=" + nonceCount
+						+ ",qop=auth,digest-uri=\"" + digestUri + "\",response="
+						+ response + ",charset=utf-8";
+					encodedResponse = Base64.encodeToString(
+							saslString.getBytes(Charset.defaultCharset()),
+							Base64.NO_WRAP);
+				} catch (final NoSuchAlgorithmException e) {
+					throw new AuthenticationException(e);
+				}
+
+				return encodedResponse;
+			case RESPONSE_SENT:
+				state = State.VALID_SERVER_RESPONSE;
+				break;
+			case VALID_SERVER_RESPONSE:
+				if (challenge==null) {
+					return null; //everything is fine
+				}
+			default:
+				throw new InvalidStateException(state);
+		}
+		return null;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java
new file mode 100644
index 00000000..179c12de
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Plain.java
@@ -0,0 +1,30 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import android.util.Base64;
+
+import java.nio.charset.Charset;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+
+public class Plain extends SaslMechanism {
+	public Plain(final TagWriter tagWriter, final Account account) {
+		super(tagWriter, account, null);
+	}
+
+	@Override
+	public int getPriority() {
+		return 10;
+	}
+
+	@Override
+	public String getMechanism() {
+		return "PLAIN";
+	}
+
+	@Override
+	public String getClientFirstMessage() {
+		final String sasl = '\u0000' + account.getUsername() + '\u0000' + account.getPassword();
+		return Base64.encodeToString(sasl.getBytes(Charset.defaultCharset()), Base64.NO_WRAP);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java
new file mode 100644
index 00000000..ed2764c8
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/SaslMechanism.java
@@ -0,0 +1,62 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import java.security.SecureRandom;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+
+public abstract class SaslMechanism {
+
+	final protected TagWriter tagWriter;
+	final protected Account account;
+	final protected SecureRandom rng;
+
+	protected static enum State {
+		INITIAL,
+		AUTH_TEXT_SENT,
+		RESPONSE_SENT,
+		VALID_SERVER_RESPONSE,
+	}
+
+	public static class AuthenticationException extends Exception {
+		public AuthenticationException(final String message) {
+			super(message);
+		}
+
+		public AuthenticationException(final Exception inner) {
+			super(inner);
+		}
+	}
+
+	public static class InvalidStateException extends AuthenticationException {
+		public InvalidStateException(final String message) {
+			super(message);
+		}
+
+		public InvalidStateException(final State state) {
+			this("Invalid state: " + state.toString());
+		}
+	}
+
+	public SaslMechanism(final TagWriter tagWriter, final Account account, final SecureRandom rng) {
+		this.tagWriter = tagWriter;
+		this.account = account;
+		this.rng = rng;
+	}
+
+	/**
+	 * The priority is used to pin the authentication mechanism. If authentication fails, it MAY be retried with another
+	 * mechanism of the same priority, but MUST NOT be tried with a mechanism of lower priority (to prevent downgrade
+	 * attacks).
+	 * @return An arbitrary int representing the priority
+	 */
+	public abstract int getPriority();
+
+	public abstract String getMechanism();
+	public String getClientFirstMessage() {
+		return "";
+	}
+	public String getResponse(final String challenge) throws AuthenticationException {
+		return "";
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java
new file mode 100644
index 00000000..af77771c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/ScramSha1.java
@@ -0,0 +1,232 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import android.util.Base64;
+import android.util.LruCache;
+
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.SHA1Digest;
+import org.bouncycastle.crypto.macs.HMac;
+import org.bouncycastle.crypto.params.KeyParameter;
+
+import java.math.BigInteger;
+import java.nio.charset.Charset;
+import java.security.InvalidKeyException;
+import java.security.SecureRandom;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+
+public class ScramSha1 extends SaslMechanism {
+	// TODO: When channel binding (SCRAM-SHA1-PLUS) is supported in future, generalize this to indicate support and/or usage.
+	final private static String GS2_HEADER = "n,,";
+	private String clientFirstMessageBare;
+	private byte[] serverFirstMessage;
+	final private String clientNonce;
+	private byte[] serverSignature = null;
+	private static HMac HMAC;
+	private static Digest DIGEST;
+	private static final byte[] CLIENT_KEY_BYTES = "Client Key".getBytes();
+	private static final byte[] SERVER_KEY_BYTES = "Server Key".getBytes();
+
+	public static class KeyPair {
+		final public byte[] clientKey;
+		final public byte[] serverKey;
+
+		public KeyPair(final byte[] clientKey, final byte[] serverKey) {
+			this.clientKey = clientKey;
+			this.serverKey = serverKey;
+		}
+	}
+
+	private static final LruCache<String, KeyPair> CACHE;
+
+	static {
+		DIGEST = new SHA1Digest();
+		HMAC = new HMac(new SHA1Digest());
+		CACHE = new LruCache<String, KeyPair>(10) {
+			protected KeyPair create(final String k) {
+				// Map keys are "bytesToHex(JID),bytesToHex(password),bytesToHex(salt),iterations".
+				// Changing any of these values forces a cache miss. `CryptoHelper.bytesToHex()'
+				// is applied to prevent commas in the strings breaking things.
+				final String[] kparts = k.split(",", 4);
+				try {
+					final byte[] saltedPassword, serverKey, clientKey;
+					saltedPassword = hi(CryptoHelper.hexToString(kparts[1]).getBytes(),
+							Base64.decode(CryptoHelper.hexToString(kparts[2]), Base64.DEFAULT), Integer.valueOf(kparts[3]));
+					serverKey = hmac(saltedPassword, SERVER_KEY_BYTES);
+					clientKey = hmac(saltedPassword, CLIENT_KEY_BYTES);
+
+					return new KeyPair(clientKey, serverKey);
+				} catch (final InvalidKeyException | NumberFormatException e) {
+					return null;
+				}
+			}
+		};
+	}
+
+	private State state = State.INITIAL;
+
+	public ScramSha1(final TagWriter tagWriter, final Account account, final SecureRandom rng) {
+		super(tagWriter, account, rng);
+
+		// This nonce should be different for each authentication attempt.
+		clientNonce = new BigInteger(100, this.rng).toString(32);
+		clientFirstMessageBare = "";
+	}
+
+	@Override
+	public int getPriority() {
+		return 20;
+	}
+
+	@Override
+	public String getMechanism() {
+		return "SCRAM-SHA-1";
+	}
+
+	@Override
+	public String getClientFirstMessage() {
+		if (clientFirstMessageBare.isEmpty() && state == State.INITIAL) {
+			clientFirstMessageBare = "n=" + CryptoHelper.saslEscape(CryptoHelper.saslPrep(account.getUsername())) +
+				",r=" + this.clientNonce;
+			state = State.AUTH_TEXT_SENT;
+		}
+		return Base64.encodeToString(
+				(GS2_HEADER + clientFirstMessageBare).getBytes(Charset.defaultCharset()),
+				Base64.NO_WRAP);
+	}
+
+	@Override
+	public String getResponse(final String challenge) throws AuthenticationException {
+		switch (state) {
+			case AUTH_TEXT_SENT:
+				serverFirstMessage = Base64.decode(challenge, Base64.DEFAULT);
+				final Tokenizer tokenizer = new Tokenizer(serverFirstMessage);
+				String nonce = "";
+				int iterationCount = -1;
+				String salt = "";
+				for (final String token : tokenizer) {
+					if (token.charAt(1) == '=') {
+						switch (token.charAt(0)) {
+							case 'i':
+								try {
+									iterationCount = Integer.parseInt(token.substring(2));
+								} catch (final NumberFormatException e) {
+									throw new AuthenticationException(e);
+								}
+								break;
+							case 's':
+								salt = token.substring(2);
+								break;
+							case 'r':
+								nonce = token.substring(2);
+								break;
+							case 'm':
+								/*
+								 * RFC 5802:
+								 * m: This attribute is reserved for future extensibility.  In this
+								 * version of SCRAM, its presence in a client or a server message
+								 * MUST cause authentication failure when the attribute is parsed by
+								 * the other end.
+								 */
+								throw new AuthenticationException("Server sent reserved token: `m'");
+						}
+					}
+				}
+
+				if (iterationCount < 0) {
+					throw new AuthenticationException("Server did not send iteration count");
+				}
+				if (nonce.isEmpty() || !nonce.startsWith(clientNonce)) {
+					throw new AuthenticationException("Server nonce does not contain client nonce: " + nonce);
+				}
+				if (salt.isEmpty()) {
+					throw new AuthenticationException("Server sent empty salt");
+				}
+
+				final String clientFinalMessageWithoutProof = "c=" + Base64.encodeToString(
+						GS2_HEADER.getBytes(), Base64.NO_WRAP) + ",r=" + nonce;
+				final byte[] authMessage = (clientFirstMessageBare + ',' + new String(serverFirstMessage) + ','
+						+ clientFinalMessageWithoutProof).getBytes();
+
+				// Map keys are "bytesToHex(JID),bytesToHex(password),bytesToHex(salt),iterations".
+				final KeyPair keys = CACHE.get(
+						CryptoHelper.bytesToHex(account.getJid().toBareJid().toString().getBytes()) + ","
+						+ CryptoHelper.bytesToHex(account.getPassword().getBytes()) + ","
+						+ CryptoHelper.bytesToHex(salt.getBytes()) + ","
+						+ String.valueOf(iterationCount)
+						);
+				if (keys == null) {
+					throw new AuthenticationException("Invalid keys generated");
+				}
+				final byte[] clientSignature;
+				try {
+					serverSignature = hmac(keys.serverKey, authMessage);
+					final byte[] storedKey = digest(keys.clientKey);
+
+					clientSignature = hmac(storedKey, authMessage);
+
+				} catch (final InvalidKeyException e) {
+					throw new AuthenticationException(e);
+				}
+
+				final byte[] clientProof = new byte[keys.clientKey.length];
+
+				for (int i = 0; i < clientProof.length; i++) {
+					clientProof[i] = (byte) (keys.clientKey[i] ^ clientSignature[i]);
+				}
+
+
+				final String clientFinalMessage = clientFinalMessageWithoutProof + ",p=" +
+					Base64.encodeToString(clientProof, Base64.NO_WRAP);
+				state = State.RESPONSE_SENT;
+				return Base64.encodeToString(clientFinalMessage.getBytes(), Base64.NO_WRAP);
+			case RESPONSE_SENT:
+				final String clientCalculatedServerFinalMessage = "v=" +
+					Base64.encodeToString(serverSignature, Base64.NO_WRAP);
+				if (!clientCalculatedServerFinalMessage.equals(new String(Base64.decode(challenge, Base64.DEFAULT)))) {
+					throw new AuthenticationException("Server final message does not match calculated final message");
+				}
+				state = State.VALID_SERVER_RESPONSE;
+				return "";
+			default:
+				throw new InvalidStateException(state);
+		}
+	}
+
+	public static synchronized byte[] hmac(final byte[] key, final byte[] input)
+		throws InvalidKeyException {
+		HMAC.init(new KeyParameter(key));
+		HMAC.update(input, 0, input.length);
+		final byte[] out = new byte[HMAC.getMacSize()];
+		HMAC.doFinal(out, 0);
+		return out;
+	}
+
+	public static synchronized byte[] digest(byte[] bytes) {
+		DIGEST.reset();
+		DIGEST.update(bytes, 0, bytes.length);
+		final byte[] out = new byte[DIGEST.getDigestSize()];
+		DIGEST.doFinal(out, 0);
+		return out;
+	}
+
+	/*
+	 * Hi() is, essentially, PBKDF2 [RFC2898] with HMAC() as the
+	 * pseudorandom function (PRF) and with dkLen == output length of
+	 * HMAC() == output length of H().
+	 */
+	private static synchronized byte[] hi(final byte[] key, final byte[] salt, final int iterations)
+		throws InvalidKeyException {
+		byte[] u = hmac(key, CryptoHelper.concatenateByteArrays(salt, CryptoHelper.ONE));
+		byte[] out = u.clone();
+		for (int i = 1; i < iterations; i++) {
+			u = hmac(key, u);
+			for (int j = 0; j < u.length; j++) {
+				out[j] ^= u[j];
+			}
+		}
+		return out;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java
new file mode 100644
index 00000000..cc2805de
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/crypto/sasl/Tokenizer.java
@@ -0,0 +1,78 @@
+package de.thedevstack.conversationsplus.crypto.sasl;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.NoSuchElementException;
+
+/**
+ * A tokenizer for GS2 header strings
+ */
+public final class Tokenizer implements Iterator<String>, Iterable<String> {
+	private final List<String> parts;
+	private int index;
+
+	public Tokenizer(final byte[] challenge) {
+		final String challengeString = new String(challenge);
+		parts = new ArrayList<>(Arrays.asList(challengeString.split(",")));
+		// Trim parts.
+		for (int i = 0; i < parts.size(); i++) {
+			parts.set(i, parts.get(i).trim());
+		}
+		index = 0;
+	}
+
+	/**
+	 * Returns true if there is at least one more element, false otherwise.
+	 *
+	 * @see #next
+	 */
+	@Override
+	public boolean hasNext() {
+		return parts.size() != index + 1;
+	}
+
+	/**
+	 * Returns the next object and advances the iterator.
+	 *
+	 * @return the next object.
+	 * @throws java.util.NoSuchElementException if there are no more elements.
+	 * @see #hasNext
+	 */
+	@Override
+	public String next() {
+		if (hasNext()) {
+			return parts.get(index++);
+		} else {
+			throw new NoSuchElementException("No such element. Size is: " + parts.size());
+		}
+	}
+
+	/**
+	 * Removes the last object returned by {@code next} from the collection.
+	 * This method can only be called once between each call to {@code next}.
+	 *
+	 * @throws UnsupportedOperationException if removing is not supported by the collection being
+	 *                                       iterated.
+	 * @throws IllegalStateException         if {@code next} has not been called, or {@code remove} has
+	 *                                       already been called after the last call to {@code next}.
+	 */
+	@Override
+	public void remove() {
+		if(index <= 0) {
+			throw new IllegalStateException("You can't delete an element before first next() method call");
+		}
+		parts.remove(--index);
+	}
+
+	/**
+	 * Returns an {@link java.util.Iterator} for the elements in this object.
+	 *
+	 * @return An {@code Iterator} instance.
+	 */
+	@Override
+	public Iterator<String> iterator() {
+		return parts.iterator();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/AbstractEntity.java b/src/main/java/de/thedevstack/conversationsplus/entities/AbstractEntity.java
new file mode 100644
index 00000000..ebc0a8d5
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/AbstractEntity.java
@@ -0,0 +1,20 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+
+public abstract class AbstractEntity {
+
+	public static final String UUID = "uuid";
+
+	protected String uuid;
+
+	public String getUuid() {
+		return this.uuid;
+	}
+
+	public abstract ContentValues getContentValues();
+
+	public boolean equals(AbstractEntity entity) {
+		return this.getUuid().equals(entity.getUuid());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Account.java b/src/main/java/de/thedevstack/conversationsplus/entities/Account.java
new file mode 100644
index 00000000..1b6539da
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Account.java
@@ -0,0 +1,411 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.os.SystemClock;
+
+import net.java.otr4j.crypto.OtrCryptoEngineImpl;
+import net.java.otr4j.crypto.OtrCryptoException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.security.PublicKey;
+import java.security.interfaces.DSAPublicKey;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.CopyOnWriteArraySet;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.OtrEngine;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Account extends AbstractEntity {
+
+	public static final String TABLENAME = "accounts";
+
+	public static final String USERNAME = "username";
+	public static final String SERVER = "server";
+	public static final String PASSWORD = "password";
+	public static final String OPTIONS = "options";
+	public static final String ROSTERVERSION = "rosterversion";
+	public static final String KEYS = "keys";
+	public static final String AVATAR = "avatar";
+
+	public static final String PINNED_MECHANISM_KEY = "pinned_mechanism";
+
+	public static final int OPTION_USETLS = 0;
+	public static final int OPTION_DISABLED = 1;
+	public static final int OPTION_REGISTER = 2;
+	public static final int OPTION_USECOMPRESSION = 3;
+
+	public static enum State {
+		DISABLED,
+		OFFLINE,
+		CONNECTING,
+		ONLINE,
+		NO_INTERNET,
+		UNAUTHORIZED(true),
+		SERVER_NOT_FOUND(true),
+		REGISTRATION_FAILED(true),
+		REGISTRATION_CONFLICT(true),
+		REGISTRATION_SUCCESSFUL,
+		REGISTRATION_NOT_SUPPORTED(true),
+		SECURITY_ERROR(true),
+		INCOMPATIBLE_SERVER(true);
+
+		private final boolean isError;
+
+		public boolean isError() {
+			return this.isError;
+		}
+
+		private State(final boolean isError) {
+			this.isError = isError;
+		}
+
+		private State() {
+			this(false);
+		}
+
+		public int getReadableId() {
+			switch (this) {
+				case DISABLED:
+					return R.string.account_status_disabled;
+				case ONLINE:
+					return R.string.account_status_online;
+				case CONNECTING:
+					return R.string.account_status_connecting;
+				case OFFLINE:
+					return R.string.account_status_offline;
+				case UNAUTHORIZED:
+					return R.string.account_status_unauthorized;
+				case SERVER_NOT_FOUND:
+					return R.string.account_status_not_found;
+				case NO_INTERNET:
+					return R.string.account_status_no_internet;
+				case REGISTRATION_FAILED:
+					return R.string.account_status_regis_fail;
+				case REGISTRATION_CONFLICT:
+					return R.string.account_status_regis_conflict;
+				case REGISTRATION_SUCCESSFUL:
+					return R.string.account_status_regis_success;
+				case REGISTRATION_NOT_SUPPORTED:
+					return R.string.account_status_regis_not_sup;
+				case SECURITY_ERROR:
+					return R.string.account_status_security_error;
+				case INCOMPATIBLE_SERVER:
+					return R.string.account_status_incompatible_server;
+				default:
+					return R.string.account_status_unknown;
+			}
+		}
+	}
+
+	public List<Conversation> pendingConferenceJoins = new CopyOnWriteArrayList<>();
+	public List<Conversation> pendingConferenceLeaves = new CopyOnWriteArrayList<>();
+	protected Jid jid;
+	protected String password;
+	protected int options = 0;
+	protected String rosterVersion;
+	protected State status = State.OFFLINE;
+	protected JSONObject keys = new JSONObject();
+	protected String avatar;
+	protected boolean online = false;
+	private OtrEngine otrEngine = null;
+	private XmppConnection xmppConnection = null;
+	private long mEndGracePeriod = 0L;
+	private String otrFingerprint;
+	private final Roster roster = new Roster(this);
+	private List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
+	private final Collection<Jid> blocklist = new CopyOnWriteArraySet<>();
+
+	public Account() {
+		this.uuid = "0";
+	}
+
+	public Account(final Jid jid, final String password) {
+		this(java.util.UUID.randomUUID().toString(), jid,
+				password, 0, null, "", null);
+	}
+
+	public Account(final String uuid, final Jid jid,
+			final String password, final int options, final String rosterVersion, final String keys,
+			final String avatar) {
+		this.uuid = uuid;
+		this.jid = jid;
+		if (jid.isBareJid()) {
+			this.setResource("mobile");
+		}
+		this.password = password;
+		this.options = options;
+		this.rosterVersion = rosterVersion;
+		try {
+			this.keys = new JSONObject(keys);
+		} catch (final JSONException ignored) {
+			this.keys = new JSONObject();
+		}
+		this.avatar = avatar;
+	}
+
+	public static Account fromCursor(final Cursor cursor) {
+		Jid jid = null;
+		try {
+			jid = Jid.fromParts(cursor.getString(cursor.getColumnIndex(USERNAME)),
+					cursor.getString(cursor.getColumnIndex(SERVER)), "mobile");
+		} catch (final InvalidJidException ignored) {
+		}
+		return new Account(cursor.getString(cursor.getColumnIndex(UUID)),
+				jid,
+				cursor.getString(cursor.getColumnIndex(PASSWORD)),
+				cursor.getInt(cursor.getColumnIndex(OPTIONS)),
+				cursor.getString(cursor.getColumnIndex(ROSTERVERSION)),
+				cursor.getString(cursor.getColumnIndex(KEYS)),
+				cursor.getString(cursor.getColumnIndex(AVATAR)));
+	}
+
+	public boolean isOptionSet(final int option) {
+		return ((options & (1 << option)) != 0);
+	}
+
+	public void setOption(final int option, final boolean value) {
+		if (value) {
+			this.options |= 1 << option;
+		} else {
+			this.options &= ~(1 << option);
+		}
+	}
+
+	public String getUsername() {
+		return jid.getLocalpart();
+	}
+
+	public void setUsername(final String username) throws InvalidJidException {
+		jid = Jid.fromParts(username, jid.getDomainpart(), jid.getResourcepart());
+	}
+
+	public Jid getServer() {
+		return jid.toDomainJid();
+	}
+
+	public void setServer(final String server) throws InvalidJidException {
+		jid = Jid.fromParts(jid.getLocalpart(), server, jid.getResourcepart());
+	}
+
+	public String getPassword() {
+		return password;
+	}
+
+	public void setPassword(final String password) {
+		this.password = password;
+	}
+
+	public State getStatus() {
+		if (isOptionSet(OPTION_DISABLED)) {
+			return State.DISABLED;
+		} else {
+			return this.status;
+		}
+	}
+
+	public void setStatus(final State status) {
+		this.status = status;
+	}
+
+	public boolean errorStatus() {
+		return getStatus().isError();
+	}
+
+	public boolean hasErrorStatus() {
+		return getXmppConnection() != null && getStatus().isError() && getXmppConnection().getAttempt() >= 2;
+	}
+
+	public String getResource() {
+		return jid.getResourcepart();
+	}
+
+	public void setResource(final String resource) {
+		try {
+			jid = Jid.fromParts(jid.getLocalpart(), jid.getDomainpart(), resource);
+		} catch (final InvalidJidException ignored) {
+		}
+	}
+
+	public Jid getJid() {
+		return jid;
+	}
+
+	public JSONObject getKeys() {
+		return keys;
+	}
+
+	public boolean setKey(final String keyName, final String keyValue) {
+		try {
+			this.keys.put(keyName, keyValue);
+			return true;
+		} catch (final JSONException e) {
+			return false;
+		}
+	}
+
+	@Override
+	public ContentValues getContentValues() {
+		final ContentValues values = new ContentValues();
+		values.put(UUID, uuid);
+		values.put(USERNAME, jid.getLocalpart());
+		values.put(SERVER, jid.getDomainpart());
+		values.put(PASSWORD, password);
+		values.put(OPTIONS, options);
+		values.put(KEYS, this.keys.toString());
+		values.put(ROSTERVERSION, rosterVersion);
+		values.put(AVATAR, avatar);
+		return values;
+	}
+
+	public void initOtrEngine(final XmppConnectionService context) {
+		this.otrEngine = new OtrEngine(context, this);
+	}
+
+	public OtrEngine getOtrEngine() {
+		return this.otrEngine;
+	}
+
+	public XmppConnection getXmppConnection() {
+		return this.xmppConnection;
+	}
+
+	public void setXmppConnection(final XmppConnection connection) {
+		this.xmppConnection = connection;
+	}
+
+	public String getOtrFingerprint() {
+		if (this.otrFingerprint == null) {
+			try {
+				if (this.otrEngine == null) {
+					return null;
+				}
+				final PublicKey publicKey = this.otrEngine.getPublicKey();
+				if (publicKey == null || !(publicKey instanceof DSAPublicKey)) {
+					return null;
+				}
+				this.otrFingerprint = new OtrCryptoEngineImpl().getFingerprint(publicKey);
+				return this.otrFingerprint;
+			} catch (final OtrCryptoException ignored) {
+				return null;
+			}
+		} else {
+			return this.otrFingerprint;
+		}
+	}
+
+	public String getRosterVersion() {
+		if (this.rosterVersion == null) {
+			return "";
+		} else {
+			return this.rosterVersion;
+		}
+	}
+
+	public void setRosterVersion(final String version) {
+		this.rosterVersion = version;
+	}
+
+	public int countPresences() {
+		return this.getRoster().getContact(this.getJid().toBareJid()).getPresences().size();
+	}
+
+	public String getPgpSignature() {
+		if (keys.has("pgp_signature")) {
+			try {
+				return keys.getString("pgp_signature");
+			} catch (final JSONException e) {
+				return null;
+			}
+		} else {
+			return null;
+		}
+	}
+
+	public Roster getRoster() {
+		return this.roster;
+	}
+
+	public List<Bookmark> getBookmarks() {
+		return this.bookmarks;
+	}
+
+	public void setBookmarks(final List<Bookmark> bookmarks) {
+		this.bookmarks = bookmarks;
+	}
+
+	public boolean hasBookmarkFor(final Jid conferenceJid) {
+		for (final Bookmark bookmark : this.bookmarks) {
+			final Jid jid = bookmark.getJid();
+			if (jid != null && jid.equals(conferenceJid.toBareJid())) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public boolean setAvatar(final String filename) {
+		if (this.avatar != null && this.avatar.equals(filename)) {
+			return false;
+		} else {
+			this.avatar = filename;
+			return true;
+		}
+	}
+
+	public String getAvatar() {
+		return this.avatar;
+	}
+
+	public void activateGracePeriod() {
+		this.mEndGracePeriod = SystemClock.elapsedRealtime()
+			+ (Config.CARBON_GRACE_PERIOD * 1000);
+	}
+
+	public void deactivateGracePeriod() {
+		this.mEndGracePeriod = 0L;
+	}
+
+	public boolean inGracePeriod() {
+		return SystemClock.elapsedRealtime() < this.mEndGracePeriod;
+	}
+
+	public String getShareableUri() {
+		final String fingerprint = this.getOtrFingerprint();
+		if (fingerprint != null) {
+			return "xmpp:" + this.getJid().toBareJid().toString() + "?otr-fingerprint="+fingerprint;
+		} else {
+			return "xmpp:" + this.getJid().toBareJid().toString();
+		}
+	}
+
+	public boolean isBlocked(final ListItem contact) {
+		final Jid jid = contact.getJid();
+		return jid != null && (blocklist.contains(jid.toBareJid()) || blocklist.contains(jid.toDomainJid()));
+	}
+
+	public boolean isBlocked(final Jid jid) {
+		return jid != null && blocklist.contains(jid.toBareJid());
+	}
+
+	public Collection<Jid> getBlocklist() {
+		return this.blocklist;
+	}
+
+	public void clearBlocklist() {
+		getBlocklist().clear();
+	}
+
+	public boolean isOnlineAndConnected() {
+		return this.getStatus() == State.ONLINE && this.getXmppConnection() != null;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Blockable.java b/src/main/java/de/thedevstack/conversationsplus/entities/Blockable.java
new file mode 100644
index 00000000..beff901d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Blockable.java
@@ -0,0 +1,11 @@
+package de.thedevstack.conversationsplus.entities;
+
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public interface Blockable {
+	public boolean isBlocked();
+	public boolean isDomainBlocked();
+	public Jid getBlockedJid();
+	public Jid getJid();
+	public Account getAccount();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java b/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java
new file mode 100644
index 00000000..ea7df2f2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Bookmark.java
@@ -0,0 +1,160 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Bookmark extends Element implements ListItem {
+
+	private Account account;
+	private Conversation mJoinedConversation;
+
+	public Bookmark(final Account account, final Jid jid) {
+		super("conference");
+		this.setAttribute("jid", jid.toString());
+		this.account = account;
+	}
+
+	private Bookmark(Account account) {
+		super("conference");
+		this.account = account;
+	}
+
+	public static Bookmark parse(Element element, Account account) {
+		Bookmark bookmark = new Bookmark(account);
+		bookmark.setAttributes(element.getAttributes());
+		bookmark.setChildren(element.getChildren());
+		return bookmark;
+	}
+
+	public void setAutojoin(boolean autojoin) {
+		if (autojoin) {
+			this.setAttribute("autojoin", "true");
+		} else {
+			this.setAttribute("autojoin", "false");
+		}
+	}
+
+	@Override
+	public int compareTo(final ListItem another) {
+		return this.getDisplayName().compareToIgnoreCase(
+				another.getDisplayName());
+	}
+
+	@Override
+	public String getDisplayName() {
+		if (this.mJoinedConversation != null
+				&& (this.mJoinedConversation.getMucOptions().getSubject() != null)) {
+			return this.mJoinedConversation.getMucOptions().getSubject();
+		} else if (getName() != null) {
+			return getName();
+		} else {
+			return this.getJid().getLocalpart();
+		}
+	}
+
+	@Override
+	public Jid getJid() {
+		return this.getAttributeAsJid("jid");
+	}
+
+	@Override
+	public List<Tag> getTags() {
+		ArrayList<Tag> tags = new ArrayList<Tag>();
+		for (Element element : getChildren()) {
+			if (element.getName().equals("group") && element.getContent() != null) {
+				String group = element.getContent();
+				tags.add(new Tag(group, UIHelper.getColorForName(group)));
+			}
+		}
+		return tags;
+	}
+
+	public String getNick() {
+		Element nick = this.findChild("nick");
+		if (nick != null) {
+			return nick.getContent();
+		} else {
+			return null;
+		}
+	}
+
+	public void setNick(String nick) {
+		Element element = this.findChild("nick");
+		if (element == null) {
+			element = this.addChild("nick");
+		}
+		element.setContent(nick);
+	}
+
+	public boolean autojoin() {
+		return this.getAttributeAsBoolean("autojoin");
+	}
+
+	public String getPassword() {
+		Element password = this.findChild("password");
+		if (password != null) {
+			return password.getContent();
+		} else {
+			return null;
+		}
+	}
+
+	public void setPassword(String password) {
+		Element element = this.findChild("password");
+		if (element != null) {
+			element.setContent(password);
+		}
+	}
+
+	public boolean match(String needle) {
+		if (needle == null) {
+			return true;
+		}
+		needle = needle.toLowerCase(Locale.US);
+		final Jid jid = getJid();
+		return (jid != null && jid.toString().contains(needle)) ||
+			getDisplayName().toLowerCase(Locale.US).contains(needle) ||
+			matchInTag(needle);
+	}
+
+	private boolean matchInTag(String needle) {
+		needle = needle.toLowerCase(Locale.US);
+		for (Tag tag : getTags()) {
+			if (tag.getName().toLowerCase(Locale.US).contains(needle)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public Account getAccount() {
+		return this.account;
+	}
+
+	public Conversation getConversation() {
+		return this.mJoinedConversation;
+	}
+
+	public void setConversation(Conversation conversation) {
+		this.mJoinedConversation = conversation;
+	}
+
+	public String getName() {
+		return this.getAttribute("name");
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public void unregisterConversation() {
+		if (this.mJoinedConversation != null) {
+			this.mJoinedConversation.deregisterWithBookmark();
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java b/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
new file mode 100644
index 00000000..07d42d28
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
@@ -0,0 +1,505 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Contact implements ListItem, Blockable {
+	public static final String TABLENAME = "contacts";
+
+	public static final String SYSTEMNAME = "systemname";
+	public static final String SERVERNAME = "servername";
+	public static final String JID = "jid";
+	public static final String OPTIONS = "options";
+	public static final String SYSTEMACCOUNT = "systemaccount";
+	public static final String PHOTOURI = "photouri";
+	public static final String KEYS = "pgpkey";
+	public static final String ACCOUNT = "accountUuid";
+	public static final String AVATAR = "avatar";
+	public static final String LAST_PRESENCE = "last_presence";
+	public static final String LAST_TIME = "last_time";
+	public static final String GROUPS = "groups";
+	public Lastseen lastseen = new Lastseen();
+	protected String accountUuid;
+	protected String systemName;
+	protected String serverName;
+	protected String presenceName;
+	protected Jid jid;
+	protected int subscription = 0;
+	protected String systemAccount;
+	protected String photoUri;
+	protected String avatar;
+	protected JSONObject keys = new JSONObject();
+	protected JSONArray groups = new JSONArray();
+	protected Presences presences = new Presences();
+	protected Account account;
+
+	public Contact(final String account, final String systemName, final String serverName,
+			final Jid jid, final int subscription, final String photoUri,
+			final String systemAccount, final String keys, final String avatar, final Lastseen lastseen, final String groups) {
+		this.accountUuid = account;
+		this.systemName = systemName;
+		this.serverName = serverName;
+		this.jid = jid;
+		this.subscription = subscription;
+		this.photoUri = photoUri;
+		this.systemAccount = systemAccount;
+		try {
+			this.keys = (keys == null ? new JSONObject("") : new JSONObject(keys));
+		} catch (JSONException e) {
+			this.keys = new JSONObject();
+		}
+		this.avatar = avatar;
+		try {
+			this.groups = (groups == null ? new JSONArray() : new JSONArray(groups));
+		} catch (JSONException e) {
+			this.groups = new JSONArray();
+		}
+		this.lastseen = lastseen;
+	}
+
+	public Contact(final Jid jid) {
+		this.jid = jid;
+	}
+
+	public static Contact fromCursor(final Cursor cursor) {
+		final Lastseen lastseen = new Lastseen(
+				cursor.getString(cursor.getColumnIndex(LAST_PRESENCE)),
+				cursor.getLong(cursor.getColumnIndex(LAST_TIME)));
+		final Jid jid;
+		try {
+			jid = Jid.fromString(cursor.getString(cursor.getColumnIndex(JID)), true);
+		} catch (final InvalidJidException e) {
+			// TODO: Borked DB... handle this somehow?
+			return null;
+		}
+		return new Contact(cursor.getString(cursor.getColumnIndex(ACCOUNT)),
+				cursor.getString(cursor.getColumnIndex(SYSTEMNAME)),
+				cursor.getString(cursor.getColumnIndex(SERVERNAME)),
+				jid,
+				cursor.getInt(cursor.getColumnIndex(OPTIONS)),
+				cursor.getString(cursor.getColumnIndex(PHOTOURI)),
+				cursor.getString(cursor.getColumnIndex(SYSTEMACCOUNT)),
+				cursor.getString(cursor.getColumnIndex(KEYS)),
+				cursor.getString(cursor.getColumnIndex(AVATAR)),
+				lastseen,
+				cursor.getString(cursor.getColumnIndex(GROUPS)));
+	}
+
+	public String getDisplayName() {
+		if (this.systemName != null) {
+			return this.systemName;
+		} else if (this.serverName != null) {
+			return this.serverName;
+		} else if (this.presenceName != null) {
+			return this.presenceName;
+		} else if (jid.hasLocalpart()) {
+			return jid.getLocalpart();
+		} else {
+			return jid.getDomainpart();
+		}
+	}
+
+	public String getProfilePhoto() {
+		return this.photoUri;
+	}
+
+	public Jid getJid() {
+		return jid;
+	}
+
+	@Override
+	public List<Tag> getTags() {
+		final ArrayList<Tag> tags = new ArrayList<>();
+		for (final String group : getGroups()) {
+			tags.add(new Tag(group, UIHelper.getColorForName(group)));
+		}
+		switch (getMostAvailableStatus()) {
+			case Presences.CHAT:
+			case Presences.ONLINE:
+				tags.add(new Tag("online", 0xff259b24));
+				break;
+			case Presences.AWAY:
+				tags.add(new Tag("away", 0xffff9800));
+				break;
+			case Presences.XA:
+				tags.add(new Tag("not available", 0xffe51c23));
+				break;
+			case Presences.DND:
+				tags.add(new Tag("dnd", 0xffe51c23));
+				break;
+		}
+		if (isBlocked()) {
+			tags.add(new Tag("blocked", 0xff2e2f3b));
+		}
+		return tags;
+	}
+
+	public boolean match(String needle) {
+		if (needle == null || needle.isEmpty()) {
+			return true;
+		}
+		needle = needle.toLowerCase(Locale.US).trim();
+		String[] parts = needle.split("\\s+");
+		if (parts.length > 1) {
+			for(int i = 0; i < parts.length; ++i) {
+				if (!match(parts[i])) {
+					return false;
+				}
+			}
+			return true;
+		} else {
+			return jid.toString().contains(needle) ||
+				getDisplayName().toLowerCase(Locale.US).contains(needle) ||
+				matchInTag(needle);
+		}
+	}
+
+	private boolean matchInTag(String needle) {
+		needle = needle.toLowerCase(Locale.US);
+		for (Tag tag : getTags()) {
+			if (tag.getName().toLowerCase(Locale.US).contains(needle)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public ContentValues getContentValues() {
+		final ContentValues values = new ContentValues();
+		values.put(ACCOUNT, accountUuid);
+		values.put(SYSTEMNAME, systemName);
+		values.put(SERVERNAME, serverName);
+		values.put(JID, jid.toString());
+		values.put(OPTIONS, subscription);
+		values.put(SYSTEMACCOUNT, systemAccount);
+		values.put(PHOTOURI, photoUri);
+		values.put(KEYS, keys.toString());
+		values.put(AVATAR, avatar);
+		values.put(LAST_PRESENCE, lastseen.presence);
+		values.put(LAST_TIME, lastseen.time);
+		values.put(GROUPS, groups.toString());
+		return values;
+	}
+
+	public int getSubscription() {
+		return this.subscription;
+	}
+
+	public Account getAccount() {
+		return this.account;
+	}
+
+	public void setAccount(Account account) {
+		this.account = account;
+		this.accountUuid = account.getUuid();
+	}
+
+	public Presences getPresences() {
+		return this.presences;
+	}
+
+	public void setPresences(Presences pres) {
+		this.presences = pres;
+	}
+
+	public void updatePresence(final String resource, final int status) {
+		this.presences.updatePresence(resource, status);
+	}
+
+	public void removePresence(final String resource) {
+		this.presences.removePresence(resource);
+	}
+
+	public void clearPresences() {
+		this.presences.clearPresences();
+		this.resetOption(Options.PENDING_SUBSCRIPTION_REQUEST);
+	}
+
+	public int getMostAvailableStatus() {
+		return this.presences.getMostAvailableStatus();
+	}
+
+	public void setPhotoUri(String uri) {
+		this.photoUri = uri;
+	}
+
+	public void setServerName(String serverName) {
+		this.serverName = serverName;
+	}
+
+	public void setSystemName(String systemName) {
+		this.systemName = systemName;
+	}
+
+	public void setPresenceName(String presenceName) {
+		this.presenceName = presenceName;
+	}
+
+	public String getSystemAccount() {
+		return systemAccount;
+	}
+
+	public void setSystemAccount(String account) {
+		this.systemAccount = account;
+	}
+
+	public List<String> getGroups() {
+		ArrayList<String> groups = new ArrayList<String>();
+		for (int i = 0; i < this.groups.length(); ++i) {
+			try {
+				groups.add(this.groups.getString(i));
+			} catch (final JSONException ignored) {
+			}
+		}
+		return groups;
+	}
+
+	public ArrayList<String> getOtrFingerprints() {
+		final ArrayList<String> fingerprints = new ArrayList<String>();
+		try {
+			if (this.keys.has("otr_fingerprints")) {
+				final JSONArray prints = this.keys.getJSONArray("otr_fingerprints");
+				for (int i = 0; i < prints.length(); ++i) {
+					final String print = prints.isNull(i) ? null : prints.getString(i);
+					if (print != null && !print.isEmpty()) {
+						fingerprints.add(prints.getString(i));
+					}
+				}
+			}
+		} catch (final JSONException ignored) {
+
+		}
+		return fingerprints;
+	}
+
+	public boolean addOtrFingerprint(String print) {
+		if (getOtrFingerprints().contains(print)) {
+			return false;
+		}
+		try {
+			JSONArray fingerprints;
+			if (!this.keys.has("otr_fingerprints")) {
+				fingerprints = new JSONArray();
+
+			} else {
+				fingerprints = this.keys.getJSONArray("otr_fingerprints");
+			}
+			fingerprints.put(print);
+			this.keys.put("otr_fingerprints", fingerprints);
+			return true;
+		} catch (final JSONException ignored) {
+			return false;
+		}
+	}
+
+	public long getPgpKeyId() {
+		if (this.keys.has("pgp_keyid")) {
+			try {
+				return this.keys.getLong("pgp_keyid");
+			} catch (JSONException e) {
+				return 0;
+			}
+		} else {
+			return 0;
+		}
+	}
+
+	public void setPgpKeyId(long keyId) {
+		try {
+			this.keys.put("pgp_keyid", keyId);
+		} catch (final JSONException ignored) {
+
+		}
+	}
+
+	public void setOption(int option) {
+		this.subscription |= 1 << option;
+	}
+
+	public void resetOption(int option) {
+		this.subscription &= ~(1 << option);
+	}
+
+	public boolean getOption(int option) {
+		return ((this.subscription & (1 << option)) != 0);
+	}
+
+	public boolean showInRoster() {
+		return (this.getOption(Contact.Options.IN_ROSTER) && (!this
+					.getOption(Contact.Options.DIRTY_DELETE)))
+			|| (this.getOption(Contact.Options.DIRTY_PUSH));
+	}
+
+	public void parseSubscriptionFromElement(Element item) {
+		String ask = item.getAttribute("ask");
+		String subscription = item.getAttribute("subscription");
+
+		if (subscription != null) {
+			switch (subscription) {
+				case "to":
+					this.resetOption(Options.FROM);
+					this.setOption(Options.TO);
+					break;
+				case "from":
+					this.resetOption(Options.TO);
+					this.setOption(Options.FROM);
+					this.resetOption(Options.PREEMPTIVE_GRANT);
+					break;
+				case "both":
+					this.setOption(Options.TO);
+					this.setOption(Options.FROM);
+					this.resetOption(Options.PREEMPTIVE_GRANT);
+					break;
+				case "none":
+					this.resetOption(Options.FROM);
+					this.resetOption(Options.TO);
+					break;
+			}
+		}
+
+		// do NOT override asking if pending push request
+		if (!this.getOption(Contact.Options.DIRTY_PUSH)) {
+			if ((ask != null) && (ask.equals("subscribe"))) {
+				this.setOption(Contact.Options.ASKING);
+			} else {
+				this.resetOption(Contact.Options.ASKING);
+			}
+		}
+	}
+
+	public void parseGroupsFromElement(Element item) {
+		this.groups = new JSONArray();
+		for (Element element : item.getChildren()) {
+			if (element.getName().equals("group") && element.getContent() != null) {
+				this.groups.put(element.getContent());
+			}
+		}
+	}
+
+	public Element asElement() {
+		final Element item = new Element("item");
+		item.setAttribute("jid", this.jid.toString());
+		if (this.serverName != null) {
+			item.setAttribute("name", this.serverName);
+		}
+		for (String group : getGroups()) {
+			item.addChild("group").setContent(group);
+		}
+		return item;
+	}
+
+	@Override
+	public int compareTo(final ListItem another) {
+		return this.getDisplayName().compareToIgnoreCase(
+				another.getDisplayName());
+	}
+
+	public Jid getServer() {
+		return getJid().toDomainJid();
+	}
+
+	public boolean setAvatar(String filename) {
+		if (this.avatar != null && this.avatar.equals(filename)) {
+			return false;
+		} else {
+			this.avatar = filename;
+			return true;
+		}
+	}
+
+	public String getAvatar() {
+		return this.avatar;
+	}
+
+	public boolean deleteOtrFingerprint(String fingerprint) {
+		boolean success = false;
+		try {
+			if (this.keys.has("otr_fingerprints")) {
+				JSONArray newPrints = new JSONArray();
+				JSONArray oldPrints = this.keys
+					.getJSONArray("otr_fingerprints");
+				for (int i = 0; i < oldPrints.length(); ++i) {
+					if (!oldPrints.getString(i).equals(fingerprint)) {
+						newPrints.put(oldPrints.getString(i));
+					} else {
+						success = true;
+					}
+				}
+				this.keys.put("otr_fingerprints", newPrints);
+			}
+			return success;
+		} catch (JSONException e) {
+			return false;
+		}
+	}
+
+	public boolean trusted() {
+		return getOption(Options.FROM) && getOption(Options.TO);
+	}
+
+	public String getShareableUri() {
+		if (getOtrFingerprints().size() >= 1) {
+			String otr = getOtrFingerprints().get(0);
+			return "xmpp:" + getJid().toBareJid().toString() + "?otr-fingerprint=" + otr;
+		} else {
+			return "xmpp:" + getJid().toBareJid().toString();
+		}
+	}
+
+	@Override
+	public boolean isBlocked() {
+		return getAccount().isBlocked(this);
+	}
+
+	@Override
+	public boolean isDomainBlocked() {
+		return getAccount().isBlocked(this.getJid().toDomainJid());
+	}
+
+	@Override
+	public Jid getBlockedJid() {
+		if (isDomainBlocked()) {
+			return getJid().toDomainJid();
+		} else {
+			return getJid();
+		}
+	}
+
+	public static class Lastseen {
+		public long time;
+		public String presence;
+
+		public Lastseen() {
+			this(null, 0);
+		}
+
+		public Lastseen(final String presence, final long time) {
+			this.presence = presence;
+			this.time = time;
+		}
+	}
+
+	public final class Options {
+		public static final int TO = 0;
+		public static final int FROM = 1;
+		public static final int ASKING = 2;
+		public static final int PREEMPTIVE_GRANT = 3;
+		public static final int IN_ROSTER = 4;
+		public static final int PENDING_SUBSCRIPTION_REQUEST = 5;
+		public static final int DIRTY_PUSH = 6;
+		public static final int DIRTY_DELETE = 7;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java b/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java
new file mode 100644
index 00000000..37cbff46
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Conversation.java
@@ -0,0 +1,770 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+
+import net.java.otr4j.OtrException;
+import net.java.otr4j.crypto.OtrCryptoException;
+import net.java.otr4j.session.SessionID;
+import net.java.otr4j.session.SessionImpl;
+import net.java.otr4j.session.SessionStatus;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.security.interfaces.DSAPublicKey;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Conversation extends AbstractEntity implements Blockable {
+	public static final String TABLENAME = "conversations";
+
+	public static final int STATUS_AVAILABLE = 0;
+	public static final int STATUS_ARCHIVED = 1;
+	public static final int STATUS_DELETED = 2;
+
+	public static final int MODE_MULTI = 1;
+	public static final int MODE_SINGLE = 0;
+
+	public static final String NAME = "name";
+	public static final String ACCOUNT = "accountUuid";
+	public static final String CONTACT = "contactUuid";
+	public static final String CONTACTJID = "contactJid";
+	public static final String STATUS = "status";
+	public static final String CREATED = "created";
+	public static final String MODE = "mode";
+	public static final String ATTRIBUTES = "attributes";
+
+	public static final String ATTRIBUTE_NEXT_ENCRYPTION = "next_encryption";
+	public static final String ATTRIBUTE_MUC_PASSWORD = "muc_password";
+	public static final String ATTRIBUTE_MUTED_TILL = "muted_till";
+	public static final String ATTRIBUTE_LAST_MESSAGE_TRANSMITTED = "last_message_transmitted";
+
+	private String name;
+	private String contactUuid;
+	private String accountUuid;
+	private Jid contactJid;
+	private int status;
+	private long created;
+	private int mode;
+
+	private JSONObject attributes = new JSONObject();
+
+	private Jid nextCounterpart;
+
+	protected final ArrayList<Message> messages = new ArrayList<>();
+	protected Account account = null;
+
+	private transient SessionImpl otrSession;
+
+	private transient String otrFingerprint = null;
+	private Smp mSmp = new Smp();
+
+	private String nextMessage;
+
+	private transient MucOptions mucOptions = null;
+
+	private byte[] symmetricKey;
+
+	private Bookmark bookmark;
+
+	private boolean messagesLeftOnServer = true;
+	private ChatState mOutgoingChatState = Config.DEFAULT_CHATSTATE;
+	private ChatState mIncomingChatState = Config.DEFAULT_CHATSTATE;
+	private String mLastReceivedOtrMessageId = null;
+
+	public boolean hasMessagesLeftOnServer() {
+		return messagesLeftOnServer;
+	}
+
+	public void setHasMessagesLeftOnServer(boolean value) {
+		this.messagesLeftOnServer = value;
+	}
+
+	public Message findUnsentMessageWithUuid(String uuid) {
+		synchronized(this.messages) {
+			for (final Message message : this.messages) {
+				final int s = message.getStatus();
+				if ((s == Message.STATUS_UNSEND || s == Message.STATUS_WAITING) && message.getUuid().equals(uuid)) {
+					return message;
+				}
+			}
+		}
+		return null;
+	}
+
+	public void findWaitingMessages(OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for(Message message : this.messages) {
+				if (message.getStatus() == Message.STATUS_WAITING) {
+					onMessageFound.onMessageFound(message);
+				}
+			}
+		}
+	}
+
+	public void findMessagesWithFiles(final OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for (final Message message : this.messages) {
+				if ((message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE)
+						&& message.getEncryption() != Message.ENCRYPTION_PGP) {
+					onMessageFound.onMessageFound(message);
+						}
+			}
+		}
+	}
+
+	public Message findMessageWithFileAndUuid(final String uuid) {
+		synchronized (this.messages) {
+			for (final Message message : this.messages) {
+				if ((message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE)
+						&& message.getEncryption() != Message.ENCRYPTION_PGP
+						&& message.getUuid().equals(uuid)) {
+					return message;
+				}
+			}
+		}
+		return null;
+	}
+
+	public void clearMessages() {
+		synchronized (this.messages) {
+			this.messages.clear();
+		}
+	}
+
+	public boolean setIncomingChatState(ChatState state) {
+		if (this.mIncomingChatState == state) {
+			return false;
+		}
+		this.mIncomingChatState = state;
+		return true;
+	}
+
+	public ChatState getIncomingChatState() {
+		return this.mIncomingChatState;
+	}
+
+	public boolean setOutgoingChatState(ChatState state) {
+		if (mode == MODE_MULTI) {
+			return false;
+		}
+		if (this.mOutgoingChatState != state) {
+			this.mOutgoingChatState = state;
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	public ChatState getOutgoingChatState() {
+		return this.mOutgoingChatState;
+	}
+
+	public void trim() {
+		synchronized (this.messages) {
+			final int size = messages.size();
+			final int maxsize = Config.PAGE_SIZE * Config.MAX_NUM_PAGES;
+			if (size > maxsize) {
+				this.messages.subList(0, size - maxsize).clear();
+			}
+		}
+	}
+
+	public void findUnsentMessagesWithOtrEncryption(OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for (Message message : this.messages) {
+				if ((message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_WAITING)
+						&& (message.getEncryption() == Message.ENCRYPTION_OTR)) {
+					onMessageFound.onMessageFound(message);
+						}
+			}
+		}
+	}
+
+	public void findUnsentTextMessages(OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for (Message message : this.messages) {
+				if (message.getType() != Message.TYPE_IMAGE
+						&& message.getStatus() == Message.STATUS_UNSEND) {
+					onMessageFound.onMessageFound(message);
+						}
+			}
+		}
+	}
+
+	public Message findSentMessageWithUuid(String uuid) {
+		synchronized (this.messages) {
+			for (Message message : this.messages) {
+				if (uuid.equals(message.getUuid())
+						|| (message.getStatus() >= Message.STATUS_SEND && uuid
+							.equals(message.getRemoteMsgId()))) {
+					return message;
+							}
+			}
+		}
+		return null;
+	}
+
+	public void populateWithMessages(final List<Message> messages) {
+		synchronized (this.messages) {
+			messages.clear();
+			messages.addAll(this.messages);
+		}
+	}
+
+	@Override
+	public boolean isBlocked() {
+		return getContact().isBlocked();
+	}
+
+	@Override
+	public boolean isDomainBlocked() {
+		return getContact().isDomainBlocked();
+	}
+
+	@Override
+	public Jid getBlockedJid() {
+		return getContact().getBlockedJid();
+	}
+
+	public String getLastReceivedOtrMessageId() {
+		return this.mLastReceivedOtrMessageId;
+	}
+
+	public void setLastReceivedOtrMessageId(String id) {
+		this.mLastReceivedOtrMessageId = id;
+	}
+
+
+	public interface OnMessageFound {
+		public void onMessageFound(final Message message);
+	}
+
+	public Conversation(final String name, final Account account, final Jid contactJid,
+			final int mode) {
+		this(java.util.UUID.randomUUID().toString(), name, null, account
+				.getUuid(), contactJid, System.currentTimeMillis(),
+				STATUS_AVAILABLE, mode, "");
+		this.account = account;
+	}
+
+	public Conversation(final String uuid, final String name, final String contactUuid,
+			final String accountUuid, final Jid contactJid, final long created, final int status,
+			final int mode, final String attributes) {
+		this.uuid = uuid;
+		this.name = name;
+		this.contactUuid = contactUuid;
+		this.accountUuid = accountUuid;
+		this.contactJid = contactJid;
+		this.created = created;
+		this.status = status;
+		this.mode = mode;
+		try {
+			this.attributes = new JSONObject(attributes == null ? "" : attributes);
+		} catch (JSONException e) {
+			this.attributes = new JSONObject();
+		}
+	}
+
+	public boolean isRead() {
+		return (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead();
+	}
+
+	public void markRead() {
+		for (int i = this.messages.size() - 1; i >= 0; --i) {
+			if (messages.get(i).isRead()) {
+				break;
+			}
+			this.messages.get(i).markRead();
+		}
+	}
+
+	public Message getLatestMarkableMessage() {
+		for (int i = this.messages.size() - 1; i >= 0; --i) {
+			if (this.messages.get(i).getStatus() <= Message.STATUS_RECEIVED
+					&& this.messages.get(i).markable) {
+				if (this.messages.get(i).isRead()) {
+					return null;
+				} else {
+					return this.messages.get(i);
+				}
+					}
+		}
+		return null;
+	}
+
+	public Message getLatestMessage() {
+		if (this.messages.size() == 0) {
+			Message message = new Message(this, "", Message.ENCRYPTION_NONE);
+			message.setTime(getCreated());
+			return message;
+		} else {
+			Message message = this.messages.get(this.messages.size() - 1);
+			message.setConversation(this);
+			return message;
+		}
+	}
+
+	public String getName() {
+		if (getMode() == MODE_MULTI) {
+			if (getMucOptions().getSubject() != null) {
+				return getMucOptions().getSubject();
+			} else if (bookmark != null && bookmark.getName() != null) {
+				return bookmark.getName();
+			} else {
+				String generatedName = getMucOptions().createNameFromParticipants();
+				if (generatedName != null) {
+					return generatedName;
+				} else {
+					return getJid().getLocalpart();
+				}
+			}
+		} else {
+			return this.getContact().getDisplayName();
+		}
+	}
+
+	public String getAccountUuid() {
+		return this.accountUuid;
+	}
+
+	public Account getAccount() {
+		return this.account;
+	}
+
+	public Contact getContact() {
+		return this.account.getRoster().getContact(this.contactJid);
+	}
+
+	public void setAccount(final Account account) {
+		this.account = account;
+	}
+
+	@Override
+	public Jid getJid() {
+		return this.contactJid;
+	}
+
+	public int getStatus() {
+		return this.status;
+	}
+
+	public long getCreated() {
+		return this.created;
+	}
+
+	public ContentValues getContentValues() {
+		ContentValues values = new ContentValues();
+		values.put(UUID, uuid);
+		values.put(NAME, name);
+		values.put(CONTACT, contactUuid);
+		values.put(ACCOUNT, accountUuid);
+		values.put(CONTACTJID, contactJid.toString());
+		values.put(CREATED, created);
+		values.put(STATUS, status);
+		values.put(MODE, mode);
+		values.put(ATTRIBUTES, attributes.toString());
+		return values;
+	}
+
+	public static Conversation fromCursor(Cursor cursor) {
+		Jid jid;
+		try {
+			jid = Jid.fromString(cursor.getString(cursor.getColumnIndex(CONTACTJID)), true);
+		} catch (final InvalidJidException e) {
+			// Borked DB..
+			jid = null;
+		}
+		return new Conversation(cursor.getString(cursor.getColumnIndex(UUID)),
+				cursor.getString(cursor.getColumnIndex(NAME)),
+				cursor.getString(cursor.getColumnIndex(CONTACT)),
+				cursor.getString(cursor.getColumnIndex(ACCOUNT)),
+				jid,
+				cursor.getLong(cursor.getColumnIndex(CREATED)),
+				cursor.getInt(cursor.getColumnIndex(STATUS)),
+				cursor.getInt(cursor.getColumnIndex(MODE)),
+				cursor.getString(cursor.getColumnIndex(ATTRIBUTES)));
+	}
+
+	public void setStatus(int status) {
+		this.status = status;
+	}
+
+	public int getMode() {
+		return this.mode;
+	}
+
+	public void setMode(int mode) {
+		this.mode = mode;
+	}
+
+	public SessionImpl startOtrSession(String presence, boolean sendStart) {
+		if (this.otrSession != null) {
+			return this.otrSession;
+		} else {
+			final SessionID sessionId = new SessionID(this.getJid().toBareJid().toString(),
+					presence,
+					"xmpp");
+			this.otrSession = new SessionImpl(sessionId, getAccount().getOtrEngine());
+			try {
+				if (sendStart) {
+					this.otrSession.startSession();
+					return this.otrSession;
+				}
+				return this.otrSession;
+			} catch (OtrException e) {
+				return null;
+			}
+		}
+
+	}
+
+	public SessionImpl getOtrSession() {
+		return this.otrSession;
+	}
+
+	public void resetOtrSession() {
+		this.otrFingerprint = null;
+		this.otrSession = null;
+		this.mSmp.hint = null;
+		this.mSmp.secret = null;
+		this.mSmp.status = Smp.STATUS_NONE;
+	}
+
+	public Smp smp() {
+		return mSmp;
+	}
+
+	public void startOtrIfNeeded() {
+		if (this.otrSession != null
+				&& this.otrSession.getSessionStatus() != SessionStatus.ENCRYPTED) {
+			try {
+				this.otrSession.startSession();
+			} catch (OtrException e) {
+				this.resetOtrSession();
+			}
+				}
+	}
+
+	public boolean endOtrIfNeeded() {
+		if (this.otrSession != null) {
+			if (this.otrSession.getSessionStatus() == SessionStatus.ENCRYPTED) {
+				try {
+					this.otrSession.endSession();
+					this.resetOtrSession();
+					return true;
+				} catch (OtrException e) {
+					this.resetOtrSession();
+					return false;
+				}
+			} else {
+				this.resetOtrSession();
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	public boolean hasValidOtrSession() {
+		return this.otrSession != null;
+	}
+
+	public synchronized String getOtrFingerprint() {
+		if (this.otrFingerprint == null) {
+			try {
+				if (getOtrSession() == null || getOtrSession().getSessionStatus() != SessionStatus.ENCRYPTED) {
+					return null;
+				}
+				DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey();
+				this.otrFingerprint = getAccount().getOtrEngine().getFingerprint(remotePubKey);
+			} catch (final OtrCryptoException | UnsupportedOperationException ignored) {
+				return null;
+			}
+		}
+		return this.otrFingerprint;
+	}
+
+	public boolean verifyOtrFingerprint() {
+		final String fingerprint = getOtrFingerprint();
+		if (fingerprint != null) {
+			getContact().addOtrFingerprint(fingerprint);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	public boolean isOtrFingerprintVerified() {
+		return getContact().getOtrFingerprints().contains(getOtrFingerprint());
+	}
+
+	public synchronized MucOptions getMucOptions() {
+		if (this.mucOptions == null) {
+			this.mucOptions = new MucOptions(this);
+		}
+		return this.mucOptions;
+	}
+
+	public void resetMucOptions() {
+		this.mucOptions = null;
+	}
+
+	public void setContactJid(final Jid jid) {
+		this.contactJid = jid;
+	}
+
+	public void setNextCounterpart(Jid jid) {
+		this.nextCounterpart = jid;
+	}
+
+	public Jid getNextCounterpart() {
+		return this.nextCounterpart;
+	}
+
+	public int getLatestEncryption() {
+		int latestEncryption = this.getLatestMessage().getEncryption();
+		if ((latestEncryption == Message.ENCRYPTION_DECRYPTED)
+				|| (latestEncryption == Message.ENCRYPTION_DECRYPTION_FAILED)) {
+			return Message.ENCRYPTION_PGP;
+		} else {
+			return latestEncryption;
+		}
+	}
+
+	public int getNextEncryption(boolean force) {
+		int next = this.getIntAttribute(ATTRIBUTE_NEXT_ENCRYPTION, -1);
+		if (next == -1) {
+			int latest = this.getLatestEncryption();
+			if (latest == Message.ENCRYPTION_NONE) {
+				if (force && getMode() == MODE_SINGLE) {
+					return Message.ENCRYPTION_OTR;
+				} else if (getContact().getPresences().size() == 1) {
+					if (getContact().getOtrFingerprints().size() >= 1) {
+						return Message.ENCRYPTION_OTR;
+					} else {
+						return latest;
+					}
+				} else {
+					return latest;
+				}
+			} else {
+				return latest;
+			}
+		}
+		if (next == Message.ENCRYPTION_NONE && force
+				&& getMode() == MODE_SINGLE) {
+			return Message.ENCRYPTION_OTR;
+		} else {
+			return next;
+		}
+	}
+
+	public void setNextEncryption(int encryption) {
+		this.setAttribute(ATTRIBUTE_NEXT_ENCRYPTION, String.valueOf(encryption));
+	}
+
+	public String getNextMessage() {
+		if (this.nextMessage == null) {
+			return "";
+		} else {
+			return this.nextMessage;
+		}
+	}
+
+	public boolean smpRequested() {
+		return smp().status == Smp.STATUS_CONTACT_REQUESTED;
+	}
+
+	public void setNextMessage(String message) {
+		this.nextMessage = message;
+	}
+
+	public void setSymmetricKey(byte[] key) {
+		this.symmetricKey = key;
+	}
+
+	public byte[] getSymmetricKey() {
+		return this.symmetricKey;
+	}
+
+	public void setBookmark(Bookmark bookmark) {
+		this.bookmark = bookmark;
+		this.bookmark.setConversation(this);
+	}
+
+	public void deregisterWithBookmark() {
+		if (this.bookmark != null) {
+			this.bookmark.setConversation(null);
+		}
+	}
+
+	public Bookmark getBookmark() {
+		return this.bookmark;
+	}
+
+	public boolean hasDuplicateMessage(Message message) {
+		synchronized (this.messages) {
+			for (int i = this.messages.size() - 1; i >= 0; --i) {
+				if (this.messages.get(i).equals(message)) {
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+	public Message findSentMessageWithBody(String body) {
+		synchronized (this.messages) {
+			for (int i = this.messages.size() - 1; i >= 0; --i) {
+				Message message = this.messages.get(i);
+				if ((message.getStatus() == Message.STATUS_UNSEND || message.getStatus() == Message.STATUS_SEND) && message.getBody() != null && message.getBody().equals(body)) {
+					return message;
+				}
+			}
+			return null;
+		}
+	}
+
+	public boolean setLastMessageTransmitted(long value) {
+		long before = getLastMessageTransmitted();
+		if (value - before > 1000) {
+			this.setAttribute(ATTRIBUTE_LAST_MESSAGE_TRANSMITTED, String.valueOf(value));
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	public long getLastMessageTransmitted() {
+		long timestamp = getLongAttribute(ATTRIBUTE_LAST_MESSAGE_TRANSMITTED,0);
+		if (timestamp == 0) {
+			synchronized (this.messages) {
+				for(int i = this.messages.size() - 1; i >= 0; --i) {
+					Message message = this.messages.get(i);
+					if (message.getStatus() == Message.STATUS_RECEIVED) {
+						return message.getTimeSent();
+					}
+				}
+			}
+		}
+		return timestamp;
+	}
+
+	public void setMutedTill(long value) {
+		this.setAttribute(ATTRIBUTE_MUTED_TILL, String.valueOf(value));
+	}
+
+	public boolean isMuted() {
+		return System.currentTimeMillis() < this.getLongAttribute(ATTRIBUTE_MUTED_TILL, 0);
+	}
+
+	public boolean setAttribute(String key, String value) {
+		try {
+			this.attributes.put(key, value);
+			return true;
+		} catch (JSONException e) {
+			return false;
+		}
+	}
+
+	public String getAttribute(String key) {
+		try {
+			return this.attributes.getString(key);
+		} catch (JSONException e) {
+			return null;
+		}
+	}
+
+	public int getIntAttribute(String key, int defaultValue) {
+		String value = this.getAttribute(key);
+		if (value == null) {
+			return defaultValue;
+		} else {
+			try {
+				return Integer.parseInt(value);
+			} catch (NumberFormatException e) {
+				return defaultValue;
+			}
+		}
+	}
+
+	public long getLongAttribute(String key, long defaultValue) {
+		String value = this.getAttribute(key);
+		if (value == null) {
+			return defaultValue;
+		} else {
+			try {
+				return Long.parseLong(value);
+			} catch (NumberFormatException e) {
+				return defaultValue;
+			}
+		}
+	}
+
+	public void add(Message message) {
+		message.setConversation(this);
+		synchronized (this.messages) {
+			this.messages.add(message);
+		}
+	}
+
+	public void addAll(int index, List<Message> messages) {
+		synchronized (this.messages) {
+			this.messages.addAll(index, messages);
+		}
+	}
+
+	public void sort() {
+		synchronized (this.messages) {
+			Collections.sort(this.messages, new Comparator<Message>() {
+				@Override
+				public int compare(Message left, Message right) {
+					if (left.getTimeSent() < right.getTimeSent()) {
+						return -1;
+					} else if (left.getTimeSent() > right.getTimeSent()) {
+						return 1;
+					} else {
+						return 0;
+					}
+				}
+			});
+			for(Message message : this.messages) {
+				message.untie();
+			}
+		}
+	}
+
+	public int unreadCount() {
+		synchronized (this.messages) {
+			int count = 0;
+			for(int i = this.messages.size() - 1; i >= 0; --i) {
+				if (this.messages.get(i).isRead()) {
+					return count;
+				}
+				++count;
+			}
+			return count;
+		}
+	}
+
+	public class Smp {
+		public static final int STATUS_NONE = 0;
+		public static final int STATUS_CONTACT_REQUESTED = 1;
+		public static final int STATUS_WE_REQUESTED = 2;
+		public static final int STATUS_FAILED = 3;
+		public static final int STATUS_VERIFIED = 4;
+
+		public String secret = null;
+		public String hint = null;
+		public int status = 0;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Downloadable.java b/src/main/java/de/thedevstack/conversationsplus/entities/Downloadable.java
new file mode 100644
index 00000000..20169dc8
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Downloadable.java
@@ -0,0 +1,28 @@
+package de.thedevstack.conversationsplus.entities;
+
+public interface Downloadable {
+
+	public final String[] VALID_IMAGE_EXTENSIONS = {"webp", "jpeg", "jpg", "png", "jpe"};
+	public final String[] VALID_CRYPTO_EXTENSIONS = {"pgp", "gpg", "otr"};
+
+	public static final int STATUS_UNKNOWN = 0x200;
+	public static final int STATUS_CHECKING = 0x201;
+	public static final int STATUS_FAILED = 0x202;
+	public static final int STATUS_OFFER = 0x203;
+	public static final int STATUS_DOWNLOADING = 0x204;
+	public static final int STATUS_DELETED = 0x205;
+	public static final int STATUS_OFFER_CHECK_FILESIZE = 0x206;
+	public static final int STATUS_UPLOADING = 0x207;
+
+	public boolean start();
+
+	public int getStatus();
+
+	public long getFileSize();
+
+	public int getProgress();
+
+	public String getMimeType();
+
+	public void cancel();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
new file mode 100644
index 00000000..7566c199
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
@@ -0,0 +1,172 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URLConnection;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+import javax.crypto.CipherOutputStream;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import de.thedevstack.conversationsplus.Config;
+import android.util.Log;
+
+public class DownloadableFile extends File {
+
+	private static final long serialVersionUID = 2247012619505115863L;
+
+	private long expectedSize = 0;
+	private String sha1sum;
+	private Key aeskey;
+	private String mime;
+
+	private byte[] iv = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0xf };
+
+	public DownloadableFile(String path) {
+		super(path);
+	}
+
+	public long getSize() {
+		return super.length();
+	}
+
+	public long getExpectedSize() {
+		if (this.aeskey != null) {
+			if (this.expectedSize == 0) {
+				return 0;
+			} else {
+				return (this.expectedSize / 16 + 1) * 16;
+			}
+		} else {
+			return this.expectedSize;
+		}
+	}
+
+	public String getMimeType() {
+		String path = this.getAbsolutePath();
+		try {
+			String mime = URLConnection.guessContentTypeFromName(path.replace("#",""));
+			if (mime != null) {
+				return mime;
+			} else if (mime == null && path.endsWith(".webp")) {
+				return "image/webp";
+			} else {
+				return "";
+			}
+		} catch (final StringIndexOutOfBoundsException e) {
+			return "";
+		}
+	}
+
+	public void setExpectedSize(long size) {
+		this.expectedSize = size;
+	}
+
+	public String getSha1Sum() {
+		return this.sha1sum;
+	}
+
+	public void setSha1Sum(String sum) {
+		this.sha1sum = sum;
+	}
+
+	public void setKey(byte[] key) {
+		if (key.length == 48) {
+			byte[] secretKey = new byte[32];
+			byte[] iv = new byte[16];
+			System.arraycopy(key, 0, iv, 0, 16);
+			System.arraycopy(key, 16, secretKey, 0, 32);
+			this.aeskey = new SecretKeySpec(secretKey, "AES");
+			this.iv = iv;
+		} else if (key.length >= 32) {
+			byte[] secretKey = new byte[32];
+			System.arraycopy(key, 0, secretKey, 0, 32);
+			this.aeskey = new SecretKeySpec(secretKey, "AES");
+		} else if (key.length >= 16) {
+			byte[] secretKey = new byte[16];
+			System.arraycopy(key, 0, secretKey, 0, 16);
+			this.aeskey = new SecretKeySpec(secretKey, "AES");
+		}
+	}
+
+	public Key getKey() {
+		return this.aeskey;
+	}
+
+	public InputStream createInputStream() {
+		if (this.getKey() == null) {
+			try {
+				return new FileInputStream(this);
+			} catch (FileNotFoundException e) {
+				return null;
+			}
+		} else {
+			try {
+				IvParameterSpec ips = new IvParameterSpec(iv);
+				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+				cipher.init(Cipher.ENCRYPT_MODE, this.getKey(), ips);
+				Log.d(Config.LOGTAG, "opening encrypted input stream");
+				return new CipherInputStream(new FileInputStream(this), cipher);
+			} catch (NoSuchAlgorithmException e) {
+				Log.d(Config.LOGTAG, "no such algo: " + e.getMessage());
+				return null;
+			} catch (NoSuchPaddingException e) {
+				Log.d(Config.LOGTAG, "no such padding: " + e.getMessage());
+				return null;
+			} catch (InvalidKeyException e) {
+				Log.d(Config.LOGTAG, "invalid key: " + e.getMessage());
+				return null;
+			} catch (InvalidAlgorithmParameterException e) {
+				Log.d(Config.LOGTAG, "invavid iv:" + e.getMessage());
+				return null;
+			} catch (FileNotFoundException e) {
+				return null;
+			}
+		}
+	}
+
+	public OutputStream createOutputStream() {
+		if (this.getKey() == null) {
+			try {
+				return new FileOutputStream(this);
+			} catch (FileNotFoundException e) {
+				return null;
+			}
+		} else {
+			try {
+				IvParameterSpec ips = new IvParameterSpec(this.iv);
+				Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+				cipher.init(Cipher.DECRYPT_MODE, this.getKey(), ips);
+				Log.d(Config.LOGTAG, "opening encrypted output stream");
+				return new CipherOutputStream(new FileOutputStream(this),
+						cipher);
+			} catch (NoSuchAlgorithmException e) {
+				Log.d(Config.LOGTAG, "no such algo: " + e.getMessage());
+				return null;
+			} catch (NoSuchPaddingException e) {
+				Log.d(Config.LOGTAG, "no such padding: " + e.getMessage());
+				return null;
+			} catch (InvalidKeyException e) {
+				Log.d(Config.LOGTAG, "invalid key: " + e.getMessage());
+				return null;
+			} catch (InvalidAlgorithmParameterException e) {
+				Log.d(Config.LOGTAG, "invavid iv:" + e.getMessage());
+				return null;
+			} catch (FileNotFoundException e) {
+				return null;
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/DownloadablePlaceholder.java b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadablePlaceholder.java
new file mode 100644
index 00000000..741d2990
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/DownloadablePlaceholder.java
@@ -0,0 +1,39 @@
+package de.thedevstack.conversationsplus.entities;
+
+public class DownloadablePlaceholder implements Downloadable {
+
+	private int status;
+
+	public DownloadablePlaceholder(int status) {
+		this.status = status;
+	}
+	@Override
+	public boolean start() {
+		return false;
+	}
+
+	@Override
+	public int getStatus() {
+		return status;
+	}
+
+	@Override
+	public long getFileSize() {
+		return 0;
+	}
+
+	@Override
+	public int getProgress() {
+		return 0;
+	}
+
+	@Override
+	public String getMimeType() {
+		return "";
+	}
+
+	@Override
+	public void cancel() {
+
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java b/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java
new file mode 100644
index 00000000..825eb481
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/ListItem.java
@@ -0,0 +1,33 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public interface ListItem extends Comparable<ListItem> {
+	public String getDisplayName();
+
+	public Jid getJid();
+
+	public List<Tag> getTags();
+
+	public final class Tag {
+		private final String name;
+		private final int color;
+
+		public Tag(final String name, final int color) {
+			this.name = name;
+			this.color = color;
+		}
+
+		public int getColor() {
+			return this.color;
+		}
+
+		public String getName() {
+			return this.name;
+		}
+	}
+
+	public boolean match(final String needle);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Message.java b/src/main/java/de/thedevstack/conversationsplus/entities/Message.java
new file mode 100644
index 00000000..cd7556b3
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Message.java
@@ -0,0 +1,587 @@
+package de.thedevstack.conversationsplus.entities;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.Arrays;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.utils.GeoHelper;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Message extends AbstractEntity {
+
+	public static final String TABLENAME = "messages";
+
+	public static final int STATUS_RECEIVED = 0;
+	public static final int STATUS_UNSEND = 1;
+	public static final int STATUS_SEND = 2;
+	public static final int STATUS_SEND_FAILED = 3;
+	public static final int STATUS_WAITING = 5;
+	public static final int STATUS_OFFERED = 6;
+	public static final int STATUS_SEND_RECEIVED = 7;
+	public static final int STATUS_SEND_DISPLAYED = 8;
+
+	public static final int ENCRYPTION_NONE = 0;
+	public static final int ENCRYPTION_PGP = 1;
+	public static final int ENCRYPTION_OTR = 2;
+	public static final int ENCRYPTION_DECRYPTED = 3;
+	public static final int ENCRYPTION_DECRYPTION_FAILED = 4;
+
+	public static final int TYPE_TEXT = 0;
+	public static final int TYPE_IMAGE = 1;
+	public static final int TYPE_FILE = 2;
+	public static final int TYPE_STATUS = 3;
+	public static final int TYPE_PRIVATE = 4;
+
+	public static final String CONVERSATION = "conversationUuid";
+	public static final String COUNTERPART = "counterpart";
+	public static final String TRUE_COUNTERPART = "trueCounterpart";
+	public static final String BODY = "body";
+	public static final String TIME_SENT = "timeSent";
+	public static final String ENCRYPTION = "encryption";
+	public static final String STATUS = "status";
+	public static final String TYPE = "type";
+	public static final String REMOTE_MSG_ID = "remoteMsgId";
+	public static final String SERVER_MSG_ID = "serverMsgId";
+	public static final String RELATIVE_FILE_PATH = "relativeFilePath";
+	public static final String ME_COMMAND = "/me ";
+
+
+	public boolean markable = false;
+	protected String conversationUuid;
+	protected Jid counterpart;
+	protected Jid trueCounterpart;
+	protected String body;
+	protected String encryptedBody;
+	protected long timeSent;
+	protected int encryption;
+	protected int status;
+	protected int type;
+	protected String relativeFilePath;
+	protected boolean read = true;
+	protected String remoteMsgId = null;
+	protected String serverMsgId = null;
+	protected Conversation conversation = null;
+	protected Downloadable downloadable = null;
+	private Message mNextMessage = null;
+	private Message mPreviousMessage = null;
+
+	private Message() {
+
+	}
+
+	public Message(Conversation conversation, String body, int encryption) {
+		this(conversation, body, encryption, STATUS_UNSEND);
+	}
+
+	public Message(Conversation conversation, String body, int encryption, int status) {
+		this(java.util.UUID.randomUUID().toString(),
+				conversation.getUuid(),
+				conversation.getJid() == null ? null : conversation.getJid().toBareJid(),
+				null,
+				body,
+				System.currentTimeMillis(),
+				encryption,
+				status,
+				TYPE_TEXT,
+				null,
+				null,
+				null);
+		this.conversation = conversation;
+	}
+
+	private Message(final String uuid, final String conversationUUid, final Jid counterpart,
+			final Jid trueCounterpart, final String body, final long timeSent,
+			final int encryption, final int status, final int type, final String remoteMsgId,
+			final String relativeFilePath, final String serverMsgId) {
+		this.uuid = uuid;
+		this.conversationUuid = conversationUUid;
+		this.counterpart = counterpart;
+		this.trueCounterpart = trueCounterpart;
+		this.body = body;
+		this.timeSent = timeSent;
+		this.encryption = encryption;
+		this.status = status;
+		this.type = type;
+		this.remoteMsgId = remoteMsgId;
+		this.relativeFilePath = relativeFilePath;
+		this.serverMsgId = serverMsgId;
+	}
+
+	public static Message fromCursor(Cursor cursor) {
+		Jid jid;
+		try {
+			String value = cursor.getString(cursor.getColumnIndex(COUNTERPART));
+			if (value != null) {
+				jid = Jid.fromString(value, true);
+			} else {
+				jid = null;
+			}
+		} catch (InvalidJidException e) {
+			jid = null;
+		}
+		Jid trueCounterpart;
+		try {
+			String value = cursor.getString(cursor.getColumnIndex(TRUE_COUNTERPART));
+			if (value != null) {
+				trueCounterpart = Jid.fromString(value, true);
+			} else {
+				trueCounterpart = null;
+			}
+		} catch (InvalidJidException e) {
+			trueCounterpart = null;
+		}
+		return new Message(cursor.getString(cursor.getColumnIndex(UUID)),
+				cursor.getString(cursor.getColumnIndex(CONVERSATION)),
+				jid,
+				trueCounterpart,
+				cursor.getString(cursor.getColumnIndex(BODY)),
+				cursor.getLong(cursor.getColumnIndex(TIME_SENT)),
+				cursor.getInt(cursor.getColumnIndex(ENCRYPTION)),
+				cursor.getInt(cursor.getColumnIndex(STATUS)),
+				cursor.getInt(cursor.getColumnIndex(TYPE)),
+				cursor.getString(cursor.getColumnIndex(REMOTE_MSG_ID)),
+				cursor.getString(cursor.getColumnIndex(RELATIVE_FILE_PATH)),
+				cursor.getString(cursor.getColumnIndex(SERVER_MSG_ID)));
+	}
+
+	public static Message createStatusMessage(Conversation conversation, String body) {
+		Message message = new Message();
+		message.setType(Message.TYPE_STATUS);
+		message.setConversation(conversation);
+		message.setBody(body);
+		return message;
+	}
+
+	@Override
+	public ContentValues getContentValues() {
+		ContentValues values = new ContentValues();
+		values.put(UUID, uuid);
+		values.put(CONVERSATION, conversationUuid);
+		if (counterpart == null) {
+			values.putNull(COUNTERPART);
+		} else {
+			values.put(COUNTERPART, counterpart.toString());
+		}
+		if (trueCounterpart == null) {
+			values.putNull(TRUE_COUNTERPART);
+		} else {
+			values.put(TRUE_COUNTERPART, trueCounterpart.toString());
+		}
+		values.put(BODY, body);
+		values.put(TIME_SENT, timeSent);
+		values.put(ENCRYPTION, encryption);
+		values.put(STATUS, status);
+		values.put(TYPE, type);
+		values.put(REMOTE_MSG_ID, remoteMsgId);
+		values.put(RELATIVE_FILE_PATH, relativeFilePath);
+		values.put(SERVER_MSG_ID,serverMsgId);
+		return values;
+	}
+
+	public String getConversationUuid() {
+		return conversationUuid;
+	}
+
+	public Conversation getConversation() {
+		return this.conversation;
+	}
+
+	public void setConversation(Conversation conv) {
+		this.conversation = conv;
+	}
+
+	public Jid getCounterpart() {
+		return counterpart;
+	}
+
+	public void setCounterpart(final Jid counterpart) {
+		this.counterpart = counterpart;
+	}
+
+	public Contact getContact() {
+		if (this.conversation.getMode() == Conversation.MODE_SINGLE) {
+			return this.conversation.getContact();
+		} else {
+			if (this.trueCounterpart == null) {
+				return null;
+			} else {
+				return this.conversation.getAccount().getRoster()
+					.getContactFromRoster(this.trueCounterpart);
+			}
+		}
+	}
+
+	public String getBody() {
+		return body;
+	}
+
+	public void setBody(String body) {
+		this.body = body;
+	}
+
+	public long getTimeSent() {
+		return timeSent;
+	}
+
+	public int getEncryption() {
+		return encryption;
+	}
+
+	public void setEncryption(int encryption) {
+		this.encryption = encryption;
+	}
+
+	public int getStatus() {
+		return status;
+	}
+
+	public void setStatus(int status) {
+		this.status = status;
+	}
+
+	public String getRelativeFilePath() {
+		return this.relativeFilePath;
+	}
+
+	public void setRelativeFilePath(String path) {
+		this.relativeFilePath = path;
+	}
+
+	public String getRemoteMsgId() {
+		return this.remoteMsgId;
+	}
+
+	public void setRemoteMsgId(String id) {
+		this.remoteMsgId = id;
+	}
+
+	public String getServerMsgId() {
+		return this.serverMsgId;
+	}
+
+	public void setServerMsgId(String id) {
+		this.serverMsgId = id;
+	}
+
+	public boolean isRead() {
+		return this.read;
+	}
+
+	public void markRead() {
+		this.read = true;
+	}
+
+	public void markUnread() {
+		this.read = false;
+	}
+
+	public void setTime(long time) {
+		this.timeSent = time;
+	}
+
+	public String getEncryptedBody() {
+		return this.encryptedBody;
+	}
+
+	public void setEncryptedBody(String body) {
+		this.encryptedBody = body;
+	}
+
+	public int getType() {
+		return this.type;
+	}
+
+	public void setType(int type) {
+		this.type = type;
+	}
+
+	public void setTrueCounterpart(Jid trueCounterpart) {
+		this.trueCounterpart = trueCounterpart;
+	}
+
+	public Downloadable getDownloadable() {
+		return this.downloadable;
+	}
+
+	public void setDownloadable(Downloadable downloadable) {
+		this.downloadable = downloadable;
+	}
+
+	public boolean equals(Message message) {
+		if (this.serverMsgId != null && message.getServerMsgId() != null) {
+			return this.serverMsgId.equals(message.getServerMsgId());
+		} else if (this.body == null || this.counterpart == null) {
+			return false;
+		} else if (message.getRemoteMsgId() != null) {
+			return (message.getRemoteMsgId().equals(this.remoteMsgId) || message.getRemoteMsgId().equals(this.uuid))
+					&& this.counterpart.equals(message.getCounterpart())
+					&& this.body.equals(message.getBody());
+		} else {
+			return this.remoteMsgId == null
+					&& this.counterpart.equals(message.getCounterpart())
+					&& this.body.equals(message.getBody())
+					&& Math.abs(this.getTimeSent() - message.getTimeSent()) < Config.PING_TIMEOUT * 500;
+		}
+	}
+
+	public Message next() {
+		synchronized (this.conversation.messages) {
+			if (this.mNextMessage == null) {
+				int index = this.conversation.messages.indexOf(this);
+				if (index < 0 || index >= this.conversation.messages.size() - 1) {
+					this.mNextMessage = null;
+				} else {
+					this.mNextMessage = this.conversation.messages.get(index + 1);
+				}
+			}
+			return this.mNextMessage;
+		}
+	}
+
+	public Message prev() {
+		synchronized (this.conversation.messages) {
+			if (this.mPreviousMessage == null) {
+				int index = this.conversation.messages.indexOf(this);
+				if (index <= 0 || index > this.conversation.messages.size()) {
+					this.mPreviousMessage = null;
+				} else {
+					this.mPreviousMessage = this.conversation.messages.get(index - 1);
+				}
+			}
+			return this.mPreviousMessage;
+		}
+	}
+
+	public boolean mergeable(final Message message) {
+		return message != null &&
+			(message.getType() == Message.TYPE_TEXT &&
+			 this.getDownloadable() == null &&
+			 message.getDownloadable() == null &&
+			 message.getEncryption() != Message.ENCRYPTION_PGP &&
+			 this.getType() == message.getType() &&
+			 //this.getStatus() == message.getStatus() &&
+			 isStatusMergeable(this.getStatus(),message.getStatus()) &&
+			 this.getEncryption() == message.getEncryption() &&
+			 this.getCounterpart() != null &&
+			 this.getCounterpart().equals(message.getCounterpart()) &&
+			 (message.getTimeSent() - this.getTimeSent()) <= (Config.MESSAGE_MERGE_WINDOW * 1000) &&
+			 !GeoHelper.isGeoUri(message.getBody()) &&
+			 !GeoHelper.isGeoUri(this.body) &&
+			 !message.bodyContainsDownloadable() &&
+			 !this.bodyContainsDownloadable() &&
+			 !message.getBody().startsWith(ME_COMMAND) &&
+			 !this.getBody().startsWith(ME_COMMAND)
+			);
+	}
+
+	private static boolean isStatusMergeable(int a, int b) {
+		return a == b || (
+				( a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_UNSEND)
+				|| (a == Message.STATUS_SEND_RECEIVED && b == Message.STATUS_SEND)
+				|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND)
+				|| (a == Message.STATUS_UNSEND && b == Message.STATUS_SEND_RECEIVED)
+				|| (a == Message.STATUS_SEND && b == Message.STATUS_UNSEND)
+				|| (a == Message.STATUS_SEND && b == Message.STATUS_SEND_RECEIVED)
+		);
+	}
+
+	public String getMergedBody() {
+		final Message next = this.next();
+		if (this.mergeable(next)) {
+			return getBody() + '\n' + next.getMergedBody();
+		}
+		return getBody();
+	}
+
+	public boolean hasMeCommand() {
+		return getMergedBody().startsWith(ME_COMMAND);
+	}
+
+	public int getMergedStatus() {
+		final Message next = this.next();
+		if (this.mergeable(next)) {
+			return next.getStatus();
+		}
+		return getStatus();
+	}
+
+	public long getMergedTimeSent() {
+		Message next = this.next();
+		if (this.mergeable(next)) {
+			return next.getMergedTimeSent();
+		} else {
+			return getTimeSent();
+		}
+	}
+
+	public boolean wasMergedIntoPrevious() {
+		Message prev = this.prev();
+		return prev != null && prev.mergeable(this);
+	}
+
+	public boolean trusted() {
+		Contact contact = this.getContact();
+		return (status > STATUS_RECEIVED || (contact != null && contact.trusted()));
+	}
+
+	public boolean bodyContainsDownloadable() {
+        /**
+         * there are a few cases where spaces result in an unwanted behavior, e.g.
+         * "http://upload.mitsu-freunde-bw.de/uploads/2015/03/i43b4bpr8.png /abc.png"
+         * or more than one image link in one message.
+         */
+        if (body.contains(" ")) {
+            return false;
+        }
+		try {
+			URL url = new URL(body);
+			if (!url.getProtocol().equalsIgnoreCase("http")
+					&& !url.getProtocol().equalsIgnoreCase("https")) {
+				return false;
+					}
+
+            String sUrlPath = url.getPath();
+			if (sUrlPath == null || sUrlPath.isEmpty()) {
+				return false;
+			}
+
+            int iSlashIndex = sUrlPath.lastIndexOf('/') + 1;
+
+            String sLastUrlPath = sUrlPath.substring(iSlashIndex).toLowerCase();
+
+			String[] extensionParts = sLastUrlPath.split("\\.");
+			if (extensionParts.length == 2
+					&& Arrays.asList(Downloadable.VALID_IMAGE_EXTENSIONS).contains(
+						extensionParts[extensionParts.length - 1])) {
+				return true;
+			} else if (extensionParts.length == 3
+					&& Arrays
+					.asList(Downloadable.VALID_CRYPTO_EXTENSIONS)
+					.contains(extensionParts[extensionParts.length - 1])
+					&& Arrays.asList(Downloadable.VALID_IMAGE_EXTENSIONS).contains(
+						extensionParts[extensionParts.length - 2])) {
+				return true;
+			} else {
+				return false;
+			}
+		} catch (MalformedURLException e) {
+			return false;
+		}
+	}
+
+	public ImageParams getImageParams() {
+		ImageParams params = getLegacyImageParams();
+		if (params != null) {
+			return params;
+		}
+		params = new ImageParams();
+		if (this.downloadable != null) {
+			params.size = this.downloadable.getFileSize();
+		}
+		if (body == null) {
+			return params;
+		}
+		String parts[] = body.split("\\|");
+		if (parts.length == 1) {
+			try {
+				params.size = Long.parseLong(parts[0]);
+			} catch (NumberFormatException e) {
+				params.origin = parts[0];
+				try {
+					params.url = new URL(parts[0]);
+				} catch (MalformedURLException e1) {
+					params.url = null;
+				}
+			}
+		} else if (parts.length == 3) {
+			try {
+				params.size = Long.parseLong(parts[0]);
+			} catch (NumberFormatException e) {
+				params.size = 0;
+			}
+			try {
+				params.width = Integer.parseInt(parts[1]);
+			} catch (NumberFormatException e) {
+				params.width = 0;
+			}
+			try {
+				params.height = Integer.parseInt(parts[2]);
+			} catch (NumberFormatException e) {
+				params.height = 0;
+			}
+		} else if (parts.length == 4) {
+			params.origin = parts[0];
+			try {
+				params.url = new URL(parts[0]);
+			} catch (MalformedURLException e1) {
+				params.url = null;
+			}
+			try {
+				params.size = Long.parseLong(parts[1]);
+			} catch (NumberFormatException e) {
+				params.size = 0;
+			}
+			try {
+				params.width = Integer.parseInt(parts[2]);
+			} catch (NumberFormatException e) {
+				params.width = 0;
+			}
+			try {
+				params.height = Integer.parseInt(parts[3]);
+			} catch (NumberFormatException e) {
+				params.height = 0;
+			}
+		}
+		return params;
+	}
+
+	public ImageParams getLegacyImageParams() {
+		ImageParams params = new ImageParams();
+		if (body == null) {
+			return params;
+		}
+		String parts[] = body.split(",");
+		if (parts.length == 3) {
+			try {
+				params.size = Long.parseLong(parts[0]);
+			} catch (NumberFormatException e) {
+				return null;
+			}
+			try {
+				params.width = Integer.parseInt(parts[1]);
+			} catch (NumberFormatException e) {
+				return null;
+			}
+			try {
+				params.height = Integer.parseInt(parts[2]);
+			} catch (NumberFormatException e) {
+				return null;
+			}
+			return params;
+		} else {
+			return null;
+		}
+	}
+
+	public void untie() {
+		this.mNextMessage = null;
+		this.mPreviousMessage = null;
+	}
+
+	public boolean isFileOrImage() {
+		return type == TYPE_FILE || type == TYPE_IMAGE;
+	}
+
+	public class ImageParams {
+		public URL url;
+		public long size = 0;
+		public int width = 0;
+		public int height = 0;
+		public String origin;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java b/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java
new file mode 100644
index 00000000..860643e0
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/MucOptions.java
@@ -0,0 +1,530 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+
+import android.annotation.SuppressLint;
+
+@SuppressLint("DefaultLocale")
+public class MucOptions {
+
+	public enum Affiliation {
+		OWNER("owner", 4, R.string.owner),
+		ADMIN("admin", 3, R.string.admin),
+		MEMBER("member", 2, R.string.member),
+		OUTCAST("outcast", 0, R.string.outcast),
+		NONE("none", 1, R.string.no_affiliation);
+
+		private Affiliation(String string, int rank, int resId) {
+			this.string = string;
+			this.resId = resId;
+			this.rank = rank;
+		}
+
+		private String string;
+		private int resId;
+		private int rank;
+
+		public int getResId() {
+			return resId;
+		}
+
+		@Override
+		public String toString() {
+			return this.string;
+		}
+
+		public boolean outranks(Affiliation affiliation) {
+			return rank > affiliation.rank;
+		}
+
+		public boolean ranks(Affiliation affiliation) {
+			return rank >= affiliation.rank;
+		}
+	}
+
+	public enum Role {
+		MODERATOR("moderator", R.string.moderator),
+		VISITOR("visitor", R.string.visitor),
+		PARTICIPANT("participant", R.string.participant),
+		NONE("none", R.string.no_role);
+
+		private Role(String string, int resId) {
+			this.string = string;
+			this.resId = resId;
+		}
+
+		private String string;
+		private int resId;
+
+		public int getResId() {
+			return resId;
+		}
+
+		@Override
+		public String toString() {
+			return this.string;
+		}
+	}
+
+	public static final int ERROR_NO_ERROR = 0;
+	public static final int ERROR_NICK_IN_USE = 1;
+	public static final int ERROR_UNKNOWN = 2;
+	public static final int ERROR_PASSWORD_REQUIRED = 3;
+	public static final int ERROR_BANNED = 4;
+	public static final int ERROR_MEMBERS_ONLY = 5;
+
+	public static final int KICKED_FROM_ROOM = 9;
+
+	public static final String STATUS_CODE_ROOM_CONFIG_CHANGED = "104";
+	public static final String STATUS_CODE_SELF_PRESENCE = "110";
+	public static final String STATUS_CODE_BANNED = "301";
+	public static final String STATUS_CODE_CHANGED_NICK = "303";
+	public static final String STATUS_CODE_KICKED = "307";
+	public static final String STATUS_CODE_LOST_MEMBERSHIP = "321";
+
+	private interface OnEventListener {
+		public void onSuccess();
+
+		public void onFailure();
+	}
+
+	public interface OnRenameListener extends OnEventListener {
+
+	}
+
+	public interface OnJoinListener extends OnEventListener {
+
+	}
+
+	public class User {
+		private Role role = Role.NONE;
+		private Affiliation affiliation = Affiliation.NONE;
+		private String name;
+		private Jid jid;
+		private long pgpKeyId = 0;
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String user) {
+			this.name = user;
+		}
+
+		public void setJid(Jid jid) {
+			this.jid = jid;
+		}
+
+		public Jid getJid() {
+			return this.jid;
+		}
+
+		public Role getRole() {
+			return this.role;
+		}
+
+		public void setRole(String role) {
+			role = role.toLowerCase();
+			switch (role) {
+				case "moderator":
+					this.role = Role.MODERATOR;
+					break;
+				case "participant":
+					this.role = Role.PARTICIPANT;
+					break;
+				case "visitor":
+					this.role = Role.VISITOR;
+					break;
+				default:
+					this.role = Role.NONE;
+					break;
+			}
+		}
+
+		@Override
+		public boolean equals(Object other) {
+			if (this == other) {
+				return true;
+			} else if (!(other instanceof User)) {
+				return false;
+			} else {
+				User o = (User) other;
+				return name != null && name.equals(o.name)
+						&& jid != null && jid.equals(o.jid)
+						&& affiliation == o.affiliation
+						&& role == o.role;
+			}
+		}
+
+		public Affiliation getAffiliation() {
+			return this.affiliation;
+		}
+
+		public void setAffiliation(String affiliation) {
+			affiliation = affiliation.toLowerCase();
+			switch (affiliation) {
+				case "admin":
+					this.affiliation = Affiliation.ADMIN;
+					break;
+				case "owner":
+					this.affiliation = Affiliation.OWNER;
+					break;
+				case "member":
+					this.affiliation = Affiliation.MEMBER;
+					break;
+				case "outcast":
+					this.affiliation = Affiliation.OUTCAST;
+					break;
+				default:
+					this.affiliation = Affiliation.NONE;
+			}
+		}
+
+		public void setPgpKeyId(long id) {
+			this.pgpKeyId = id;
+		}
+
+		public long getPgpKeyId() {
+			return this.pgpKeyId;
+		}
+
+		public Contact getContact() {
+			return account.getRoster().getContactFromRoster(getJid());
+		}
+	}
+
+	private Account account;
+	private List<User> users = new CopyOnWriteArrayList<>();
+	private List<String> features = new ArrayList<>();
+	private Conversation conversation;
+	private boolean isOnline = false;
+	private int error = ERROR_UNKNOWN;
+	private OnRenameListener onRenameListener = null;
+	private OnJoinListener onJoinListener = null;
+	private User self = new User();
+	private String subject = null;
+	private String password = null;
+	private boolean mNickChangingInProgress = false;
+
+	public MucOptions(Conversation conversation) {
+		this.account = conversation.getAccount();
+		this.conversation = conversation;
+	}
+
+	public void updateFeatures(ArrayList<String> features) {
+		this.features.clear();
+		this.features.addAll(features);
+	}
+
+	public boolean hasFeature(String feature) {
+		return this.features.contains(feature);
+	}
+
+	public boolean canInvite() {
+		 return !membersOnly() || self.getAffiliation().ranks(Affiliation.ADMIN);
+	}
+
+	public boolean membersOnly() {
+		return hasFeature("muc_membersonly");
+	}
+
+	public boolean nonanonymous() {
+		return hasFeature("muc_nonanonymous");
+	}
+
+	public boolean persistent() {
+		return hasFeature("muc_persistent");
+	}
+
+	public void deleteUser(String name) {
+		for (int i = 0; i < users.size(); ++i) {
+			if (users.get(i).getName().equals(name)) {
+				users.remove(i);
+				return;
+			}
+		}
+	}
+
+	public void addUser(User user) {
+		for (int i = 0; i < users.size(); ++i) {
+			if (users.get(i).getName().equals(user.getName())) {
+				users.set(i, user);
+				return;
+			}
+		}
+		users.add(user);
+	}
+
+	public void processPacket(PresencePacket packet, PgpEngine pgp) {
+		final Jid from = packet.getFrom();
+		if (!from.isBareJid()) {
+			final String name = from.getResourcepart();
+			final String type = packet.getAttribute("type");
+			final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
+			final List<String> codes = getStatusCodes(x);
+			if (type == null) {
+				User user = new User();
+				if (x != null) {
+					Element item = x.findChild("item");
+					if (item != null && name != null) {
+						user.setName(name);
+						user.setAffiliation(item.getAttribute("affiliation"));
+						user.setRole(item.getAttribute("role"));
+						user.setJid(item.getAttributeAsJid("jid"));
+						if (codes.contains(STATUS_CODE_SELF_PRESENCE) || packet.getFrom().equals(this.conversation.getJid())) {
+							this.isOnline = true;
+							this.error = ERROR_NO_ERROR;
+							self = user;
+							if (mNickChangingInProgress) {
+								onRenameListener.onSuccess();
+								mNickChangingInProgress = false;
+							} else if (this.onJoinListener != null) {
+								this.onJoinListener.onSuccess();
+								this.onJoinListener = null;
+							}
+						} else {
+							addUser(user);
+						}
+						if (pgp != null) {
+							Element signed = packet.findChild("x", "jabber:x:signed");
+							if (signed != null) {
+								Element status = packet.findChild("status");
+								String msg;
+								if (status != null) {
+									msg = status.getContent();
+								} else {
+									msg = "";
+								}
+								user.setPgpKeyId(pgp.fetchKeyId(account, msg,
+										signed.getContent()));
+							}
+						}
+					}
+				}
+			} else if (type.equals("unavailable")) {
+				if (codes.contains(STATUS_CODE_SELF_PRESENCE) ||
+						packet.getFrom().equals(this.conversation.getJid())) {
+					if (codes.contains(STATUS_CODE_CHANGED_NICK)) {
+						this.mNickChangingInProgress = true;
+					} else if (codes.contains(STATUS_CODE_KICKED)) {
+						setError(KICKED_FROM_ROOM);
+					} else if (codes.contains(STATUS_CODE_BANNED)) {
+						setError(ERROR_BANNED);
+					} else if (codes.contains(STATUS_CODE_LOST_MEMBERSHIP)) {
+						setError(ERROR_MEMBERS_ONLY);
+					} else {
+						setError(ERROR_UNKNOWN);
+					}
+				} else {
+					deleteUser(name);
+				}
+			} else if (type.equals("error")) {
+				Element error = packet.findChild("error");
+				if (error != null && error.hasChild("conflict")) {
+					if (isOnline) {
+						if (onRenameListener != null) {
+							onRenameListener.onFailure();
+						}
+					} else {
+						setError(ERROR_NICK_IN_USE);
+					}
+				} else if (error != null && error.hasChild("not-authorized")) {
+					setError(ERROR_PASSWORD_REQUIRED);
+				} else if (error != null && error.hasChild("forbidden")) {
+					setError(ERROR_BANNED);
+				} else if (error != null && error.hasChild("registration-required")) {
+					setError(ERROR_MEMBERS_ONLY);
+				} else {
+					setError(ERROR_UNKNOWN);
+				}
+			}
+		}
+	}
+
+	private void setError(int error) {
+		this.isOnline = false;
+		this.error = error;
+		if (onJoinListener != null) {
+			onJoinListener.onFailure();
+			onJoinListener = null;
+		}
+	}
+
+	private List<String> getStatusCodes(Element x) {
+		List<String> codes = new ArrayList<>();
+		if (x != null) {
+			for (Element child : x.getChildren()) {
+				if (child.getName().equals("status")) {
+					String code = child.getAttribute("code");
+					if (code != null) {
+						codes.add(code);
+					}
+				}
+			}
+		}
+		return codes;
+	}
+
+	public List<User> getUsers() {
+		return this.users;
+	}
+
+	public String getProposedNick() {
+		if (conversation.getBookmark() != null
+				&& conversation.getBookmark().getNick() != null
+				&& !conversation.getBookmark().getNick().isEmpty()) {
+			return conversation.getBookmark().getNick();
+		} else if (!conversation.getJid().isBareJid()) {
+			return conversation.getJid().getResourcepart();
+		} else {
+			return account.getUsername();
+		}
+	}
+
+	public String getActualNick() {
+		if (this.self.getName() != null) {
+			return this.self.getName();
+		} else {
+			return this.getProposedNick();
+		}
+	}
+
+	public boolean online() {
+		return this.isOnline;
+	}
+
+	public int getError() {
+		return this.error;
+	}
+
+	public void setOnRenameListener(OnRenameListener listener) {
+		this.onRenameListener = listener;
+	}
+
+	public void setOnJoinListener(OnJoinListener listener) {
+		this.onJoinListener = listener;
+	}
+
+	public void setOffline() {
+		this.users.clear();
+		this.error = 0;
+		this.isOnline = false;
+	}
+
+	public User getSelf() {
+		return self;
+	}
+
+	public void setSubject(String content) {
+		this.subject = content;
+	}
+
+	public String getSubject() {
+		return this.subject;
+	}
+
+	public String createNameFromParticipants() {
+		if (users.size() >= 2) {
+			List<String> names = new ArrayList<String>();
+			for (User user : users) {
+				Contact contact = user.getContact();
+				if (contact != null && !contact.getDisplayName().isEmpty()) {
+					names.add(contact.getDisplayName().split("\\s+")[0]);
+				} else {
+					names.add(user.getName());
+				}
+			}
+			StringBuilder builder = new StringBuilder();
+			for (int i = 0; i < names.size(); ++i) {
+				builder.append(names.get(i));
+				if (i != names.size() - 1) {
+					builder.append(", ");
+				}
+			}
+			return builder.toString();
+		} else {
+			return null;
+		}
+	}
+
+	public long[] getPgpKeyIds() {
+		List<Long> ids = new ArrayList<>();
+		for (User user : getUsers()) {
+			if (user.getPgpKeyId() != 0) {
+				ids.add(user.getPgpKeyId());
+			}
+		}
+		long[] primitivLongArray = new long[ids.size()];
+		for (int i = 0; i < ids.size(); ++i) {
+			primitivLongArray[i] = ids.get(i);
+		}
+		return primitivLongArray;
+	}
+
+	public boolean pgpKeysInUse() {
+		for (User user : getUsers()) {
+			if (user.getPgpKeyId() != 0) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	public boolean everybodyHasKeys() {
+		for (User user : getUsers()) {
+			if (user.getPgpKeyId() == 0) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	public Jid createJoinJid(String nick) {
+		try {
+			return Jid.fromString(this.conversation.getJid().toBareJid().toString() + "/" + nick);
+		} catch (final InvalidJidException e) {
+			return null;
+		}
+	}
+
+	public Jid getTrueCounterpart(String counterpart) {
+		for (User user : this.getUsers()) {
+			if (user.getName().equals(counterpart)) {
+				return user.getJid();
+			}
+		}
+		return null;
+	}
+
+	public String getPassword() {
+		this.password = conversation.getAttribute(Conversation.ATTRIBUTE_MUC_PASSWORD);
+		if (this.password == null && conversation.getBookmark() != null
+				&& conversation.getBookmark().getPassword() != null) {
+			return conversation.getBookmark().getPassword();
+		} else {
+			return this.password;
+		}
+	}
+
+	public void setPassword(String password) {
+		if (conversation.getBookmark() != null) {
+			conversation.getBookmark().setPassword(password);
+		} else {
+			this.password = password;
+		}
+		conversation.setAttribute(Conversation.ATTRIBUTE_MUC_PASSWORD, password);
+	}
+
+	public Conversation getConversation() {
+		return this.conversation;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java b/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java
new file mode 100644
index 00000000..cb984648
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Presences.java
@@ -0,0 +1,90 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Map.Entry;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Presences {
+
+	public static final int CHAT = -1;
+	public static final int ONLINE = 0;
+	public static final int AWAY = 1;
+	public static final int XA = 2;
+	public static final int DND = 3;
+	public static final int OFFLINE = 4;
+
+	private Hashtable<String, Integer> presences = new Hashtable<String, Integer>();
+
+	public Hashtable<String, Integer> getPresences() {
+		return this.presences;
+	}
+
+	public void updatePresence(String resource, int status) {
+		synchronized (this.presences) {
+			this.presences.put(resource, status);
+		}
+	}
+
+	public void removePresence(String resource) {
+		synchronized (this.presences) {
+			this.presences.remove(resource);
+		}
+	}
+
+	public void clearPresences() {
+		synchronized (this.presences) {
+			this.presences.clear();
+		}
+	}
+
+	public int getMostAvailableStatus() {
+		int status = OFFLINE;
+		synchronized (this.presences) {
+			Iterator<Entry<String, Integer>> it = presences.entrySet().iterator();
+			while (it.hasNext()) {
+				Entry<String, Integer> entry = it.next();
+				if (entry.getValue() < status)
+					status = entry.getValue();
+			}
+		}
+		return status;
+	}
+
+	public static int parseShow(Element show) {
+		if ((show == null) || (show.getContent() == null)) {
+			return Presences.ONLINE;
+		} else if (show.getContent().equals("away")) {
+			return Presences.AWAY;
+		} else if (show.getContent().equals("xa")) {
+			return Presences.XA;
+		} else if (show.getContent().equals("chat")) {
+			return Presences.CHAT;
+		} else if (show.getContent().equals("dnd")) {
+			return Presences.DND;
+		} else {
+			return Presences.OFFLINE;
+		}
+	}
+
+	public int size() {
+		synchronized (this.presences) {
+			return presences.size();
+		}
+	}
+
+	public String[] asStringArray() {
+		synchronized (this.presences) {
+			final String[] presencesArray = new String[presences.size()];
+			presences.keySet().toArray(presencesArray);
+			return presencesArray;
+		}
+	}
+
+	public boolean has(String presence) {
+		synchronized (this.presences) {
+			return presences.containsKey(presence);
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/entities/Roster.java b/src/main/java/de/thedevstack/conversationsplus/entities/Roster.java
new file mode 100644
index 00000000..0c719ed9
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/entities/Roster.java
@@ -0,0 +1,91 @@
+package de.thedevstack.conversationsplus.entities;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Roster {
+	final Account account;
+	final HashMap<String, Contact> contacts = new HashMap<>();
+	private String version = null;
+
+	public Roster(Account account) {
+		this.account = account;
+	}
+
+	public Contact getContactFromRoster(Jid jid) {
+		if (jid == null) {
+			return null;
+		}
+		synchronized (this.contacts) {
+			Contact contact = contacts.get(jid.toBareJid().toString());
+			if (contact != null && contact.showInRoster()) {
+				return contact;
+			} else {
+				return null;
+			}
+		}
+	}
+
+	public Contact getContact(final Jid jid) {
+		synchronized (this.contacts) {
+			final Jid bareJid = jid.toBareJid();
+			if (contacts.containsKey(bareJid.toString())) {
+				return contacts.get(bareJid.toString());
+			} else {
+				Contact contact = new Contact(bareJid);
+				contact.setAccount(account);
+				contacts.put(bareJid.toString(), contact);
+				return contact;
+			}
+		}
+	}
+
+	public void clearPresences() {
+		for (Contact contact : getContacts()) {
+			contact.clearPresences();
+		}
+	}
+
+	public void markAllAsNotInRoster() {
+		for (Contact contact : getContacts()) {
+			contact.resetOption(Contact.Options.IN_ROSTER);
+		}
+	}
+
+	public void clearSystemAccounts() {
+		for (Contact contact : getContacts()) {
+			contact.setPhotoUri(null);
+			contact.setSystemName(null);
+			contact.setSystemAccount(null);
+		}
+	}
+
+	public List<Contact> getContacts() {
+		synchronized (this.contacts) {
+			return new ArrayList<>(this.contacts.values());
+		}
+	}
+
+	public void initContact(final Contact contact) {
+		contact.setAccount(account);
+		contact.setOption(Contact.Options.IN_ROSTER);
+		synchronized (this.contacts) {
+			contacts.put(contact.getJid().toBareJid().toString(), contact);
+		}
+	}
+
+	public void setVersion(String version) {
+		this.version = version;
+	}
+
+	public String getVersion() {
+		return this.version;
+	}
+
+	public Account getAccount() {
+		return this.account;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java
new file mode 100644
index 00000000..cb56228d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/AbstractGenerator.java
@@ -0,0 +1,91 @@
+package de.thedevstack.conversationsplus.generator;
+
+import android.util.Base64;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+import java.util.TimeZone;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.PhoneHelper;
+
+public abstract class AbstractGenerator {
+	private final String[] FEATURES = {
+			"urn:xmpp:jingle:1",
+			"urn:xmpp:jingle:apps:file-transfer:3",
+			"urn:xmpp:jingle:transports:s5b:1",
+			"urn:xmpp:jingle:transports:ibb:1",
+			"http://jabber.org/protocol/muc",
+			"jabber:x:conference",
+			"http://jabber.org/protocol/caps",
+			"http://jabber.org/protocol/disco#info",
+			"urn:xmpp:avatar:metadata+notify",
+			"urn:xmpp:ping",
+			"jabber:iq:version",
+			"http://jabber.org/protocol/chatstates"};
+	private final String[] MESSAGE_CONFIRMATION_FEATURES = {
+			"urn:xmpp:chat-markers:0",
+			"urn:xmpp:receipts"
+	};
+	private String mVersion = null;
+	public final String IDENTITY_NAME = "Conversations";
+	public final String IDENTITY_TYPE = "phone";
+
+	private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
+
+	protected XmppConnectionService mXmppConnectionService;
+
+	protected AbstractGenerator(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	protected String getIdentityVersion() {
+		if (mVersion == null) {
+			this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
+		}
+		return this.mVersion;
+	}
+
+	protected String getIdentityName() {
+		return IDENTITY_NAME + " " + getIdentityVersion();
+	}
+
+	public String getCapHash() {
+		StringBuilder s = new StringBuilder();
+		s.append("client/" + IDENTITY_TYPE + "//" + getIdentityName() + "<");
+		MessageDigest md;
+		try {
+			md = MessageDigest.getInstance("SHA-1");
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		}
+
+		for (String feature : getFeatures()) {
+			s.append(feature + "<");
+		}
+		byte[] sha1 = md.digest(s.toString().getBytes());
+		return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
+	}
+
+	public static String getTimestamp(long time) {
+		DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
+		return DATE_FORMAT.format(time);
+	}
+
+	public List<String> getFeatures() {
+		ArrayList<String> features = new ArrayList<>();
+		features.addAll(Arrays.asList(FEATURES));
+		if (Settings.CONFIRM_MESSAGE_RECEIVED) {
+			features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
+		}
+		Collections.sort(features);
+		return features;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
new file mode 100644
index 00000000..ccba1e1d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
@@ -0,0 +1,189 @@
+package de.thedevstack.conversationsplus.generator;
+
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.services.MessageArchiveService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.Xmlns;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class IqGenerator extends AbstractGenerator {
+
+	public IqGenerator(final XmppConnectionService service) {
+		super(service);
+	}
+
+	public IqPacket discoResponse(final IqPacket request) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.RESULT);
+		packet.setId(request.getId());
+		packet.setTo(request.getFrom());
+		final Element query = packet.addChild("query",
+				"http://jabber.org/protocol/disco#info");
+		query.setAttribute("node", request.query().getAttribute("node"));
+		final Element identity = query.addChild("identity");
+		identity.setAttribute("category", "client");
+		identity.setAttribute("type", IDENTITY_TYPE);
+		identity.setAttribute("name", getIdentityName());
+		for (final String feature : getFeatures()) {
+			query.addChild("feature").setAttribute("var", feature);
+		}
+		return packet;
+	}
+
+	public IqPacket versionResponse(final IqPacket request) {
+		final IqPacket packet = request.generateResponse(IqPacket.TYPE.RESULT);
+		Element query = packet.query("jabber:iq:version");
+		query.addChild("name").setContent(IDENTITY_NAME);
+		query.addChild("version").setContent(getIdentityVersion());
+		return packet;
+	}
+
+	protected IqPacket publish(final String node, final Element item) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		final Element pubsub = packet.addChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		final Element publish = pubsub.addChild("publish");
+		publish.setAttribute("node", node);
+		publish.addChild(item);
+		return packet;
+	}
+
+	protected IqPacket retrieve(String node, Element item) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.GET);
+		final Element pubsub = packet.addChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		final Element items = pubsub.addChild("items");
+		items.setAttribute("node", node);
+		if (item != null) {
+			items.addChild(item);
+		}
+		return packet;
+	}
+
+	public IqPacket publishAvatar(Avatar avatar) {
+		final Element item = new Element("item");
+		item.setAttribute("id", avatar.sha1sum);
+		final Element data = item.addChild("data", "urn:xmpp:avatar:data");
+		data.setContent(avatar.image);
+		return publish("urn:xmpp:avatar:data", item);
+	}
+
+	public IqPacket publishAvatarMetadata(final Avatar avatar) {
+		final Element item = new Element("item");
+		item.setAttribute("id", avatar.sha1sum);
+		final Element metadata = item
+			.addChild("metadata", "urn:xmpp:avatar:metadata");
+		final Element info = metadata.addChild("info");
+		info.setAttribute("bytes", avatar.size);
+		info.setAttribute("id", avatar.sha1sum);
+		info.setAttribute("height", avatar.height);
+		info.setAttribute("width", avatar.height);
+		info.setAttribute("type", avatar.type);
+		return publish("urn:xmpp:avatar:metadata", item);
+	}
+
+	public IqPacket retrieveAvatar(final Avatar avatar) {
+		final Element item = new Element("item");
+		item.setAttribute("id", avatar.sha1sum);
+		final IqPacket packet = retrieve("urn:xmpp:avatar:data", item);
+		packet.setTo(avatar.owner);
+		return packet;
+	}
+
+	public IqPacket retrieveAvatarMetaData(final Jid to) {
+		final IqPacket packet = retrieve("urn:xmpp:avatar:metadata", null);
+		if (to != null) {
+			packet.setTo(to);
+		}
+		return packet;
+	}
+
+	public IqPacket queryMessageArchiveManagement(final MessageArchiveService.Query mam) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		final Element query = packet.query("urn:xmpp:mam:0");
+		query.setAttribute("queryid",mam.getQueryId());
+		final Data data = new Data();
+		data.setFormType("urn:xmpp:mam:0");
+		if (mam.muc()) {
+			packet.setTo(mam.getWith());
+		} else if (mam.getWith()!=null) {
+			data.put("with", mam.getWith().toString());
+		}
+		data.put("start",getTimestamp(mam.getStart()));
+		data.put("end",getTimestamp(mam.getEnd()));
+		query.addChild(data);
+		if (mam.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
+			query.addChild("set", "http://jabber.org/protocol/rsm").addChild("before").setContent(mam.getReference());
+		} else if (mam.getReference() != null) {
+			query.addChild("set", "http://jabber.org/protocol/rsm").addChild("after").setContent(mam.getReference());
+		}
+		return packet;
+	}
+	public IqPacket generateGetBlockList() {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+		iq.addChild("blocklist", Xmlns.BLOCKING);
+
+		return iq;
+	}
+
+	public IqPacket generateSetBlockRequest(final Jid jid) {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+		final Element block = iq.addChild("block", Xmlns.BLOCKING);
+		block.addChild("item").setAttribute("jid", jid.toBareJid().toString());
+		return iq;
+	}
+
+	public IqPacket generateSetUnblockRequest(final Jid jid) {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+		final Element block = iq.addChild("unblock", Xmlns.BLOCKING);
+		block.addChild("item").setAttribute("jid", jid.toBareJid().toString());
+		return iq;
+	}
+
+	public IqPacket generateSetPassword(final Account account, final String newPassword) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		packet.setTo(account.getServer());
+		final Element query = packet.addChild("query", Xmlns.REGISTER);
+		final Jid jid = account.getJid();
+		query.addChild("username").setContent(jid.getLocalpart());
+		query.addChild("password").setContent(newPassword);
+		return packet;
+	}
+
+	public IqPacket changeAffiliation(Conversation conference, Jid jid, String affiliation) {
+		List<Jid> jids = new ArrayList<>();
+		jids.add(jid);
+		return changeAffiliation(conference,jids,affiliation);
+	}
+
+	public IqPacket changeAffiliation(Conversation conference, List<Jid> jids, String affiliation) {
+		IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		packet.setTo(conference.getJid().toBareJid());
+		packet.setFrom(conference.getAccount().getJid());
+		Element query = packet.query("http://jabber.org/protocol/muc#admin");
+		for(Jid jid : jids) {
+			Element item = query.addChild("item");
+			item.setAttribute("jid", jid.toString());
+			item.setAttribute("affiliation", affiliation);
+		}
+		return packet;
+	}
+
+	public IqPacket changeRole(Conversation conference, String nick, String role) {
+		IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
+		packet.setTo(conference.getJid().toBareJid());
+		packet.setFrom(conference.getAccount().getJid());
+		Element item = packet.query("http://jabber.org/protocol/muc#admin").addChild("item");
+		item.setAttribute("nick", nick);
+		item.setAttribute("role", role);
+		return packet;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java
new file mode 100644
index 00000000..41b41882
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/MessageGenerator.java
@@ -0,0 +1,187 @@
+package de.thedevstack.conversationsplus.generator;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.TimeZone;
+
+import net.java.otr4j.OtrException;
+import net.java.otr4j.session.Session;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+
+public class MessageGenerator extends AbstractGenerator {
+	public MessageGenerator(XmppConnectionService service) {
+		super(service);
+	}
+
+	private MessagePacket preparePacket(Message message, boolean addDelay) {
+		Conversation conversation = message.getConversation();
+		Account account = conversation.getAccount();
+		MessagePacket packet = new MessagePacket();
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			packet.setTo(message.getCounterpart());
+			packet.setType(MessagePacket.TYPE_CHAT);
+			packet.addChild("markable", "urn:xmpp:chat-markers:0");
+			if (this.mXmppConnectionService.indicateReceived()) {
+				packet.addChild("request", "urn:xmpp:receipts");
+			}
+		} else if (message.getType() == Message.TYPE_PRIVATE) {
+			packet.setTo(message.getCounterpart());
+			packet.setType(MessagePacket.TYPE_CHAT);
+			if (this.mXmppConnectionService.indicateReceived()) {
+				packet.addChild("request", "urn:xmpp:receipts");
+			}
+		} else {
+			packet.setTo(message.getCounterpart().toBareJid());
+			packet.setType(MessagePacket.TYPE_GROUPCHAT);
+		}
+		packet.setFrom(account.getJid());
+		packet.setId(message.getUuid());
+		if (addDelay) {
+			addDelay(packet, message.getTimeSent());
+		}
+		return packet;
+	}
+
+	private void addDelay(MessagePacket packet, long timestamp) {
+		final SimpleDateFormat mDateFormat = new SimpleDateFormat(
+				"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
+		mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+		Element delay = packet.addChild("delay", "urn:xmpp:delay");
+		Date date = new Date(timestamp);
+		delay.setAttribute("stamp", mDateFormat.format(date));
+	}
+
+	public MessagePacket generateOtrChat(Message message) {
+		return generateOtrChat(message, false);
+	}
+
+	public MessagePacket generateOtrChat(Message message, boolean addDelay) {
+		Session otrSession = message.getConversation().getOtrSession();
+		if (otrSession == null) {
+			return null;
+		}
+		MessagePacket packet = preparePacket(message, addDelay);
+		packet.addChild("private", "urn:xmpp:carbons:2");
+		packet.addChild("no-copy", "urn:xmpp:hints");
+		try {
+			packet.setBody(otrSession.transformSending(message.getBody())[0]);
+			return packet;
+		} catch (OtrException e) {
+			return null;
+		}
+	}
+
+	public MessagePacket generateChat(Message message) {
+		return generateChat(message, false);
+	}
+
+	public MessagePacket generateChat(Message message, boolean addDelay) {
+		MessagePacket packet = preparePacket(message, addDelay);
+		packet.setBody(message.getBody());
+		return packet;
+	}
+
+	public MessagePacket generatePgpChat(Message message) {
+		return generatePgpChat(message, false);
+	}
+
+	public MessagePacket generatePgpChat(Message message, boolean addDelay) {
+		MessagePacket packet = preparePacket(message, addDelay);
+		packet.setBody("This is an XEP-0027 encryted message");
+		if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+			packet.addChild("x", "jabber:x:encrypted").setContent(
+					message.getEncryptedBody());
+		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+			packet.addChild("x", "jabber:x:encrypted").setContent(
+					message.getBody());
+		}
+		return packet;
+	}
+
+	public MessagePacket generateChatState(Conversation conversation) {
+		final Account account = conversation.getAccount();
+		MessagePacket packet = new MessagePacket();
+		packet.setTo(conversation.getJid().toBareJid());
+		packet.setFrom(account.getJid());
+		packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
+		return packet;
+	}
+
+	public MessagePacket confirm(final Account account, final Jid to, final String id) {
+		MessagePacket packet = new MessagePacket();
+		packet.setType(MessagePacket.TYPE_NORMAL);
+		packet.setTo(to);
+		packet.setFrom(account.getJid());
+		Element received = packet.addChild("displayed",
+				"urn:xmpp:chat-markers:0");
+		received.setAttribute("id", id);
+		return packet;
+	}
+
+	public MessagePacket conferenceSubject(Conversation conversation,
+			String subject) {
+		MessagePacket packet = new MessagePacket();
+		packet.setType(MessagePacket.TYPE_GROUPCHAT);
+		packet.setTo(conversation.getJid().toBareJid());
+		Element subjectChild = new Element("subject");
+		subjectChild.setContent(subject);
+		packet.addChild(subjectChild);
+		packet.setFrom(conversation.getAccount().getJid().toBareJid());
+		return packet;
+	}
+
+	public MessagePacket directInvite(final Conversation conversation, final Jid contact) {
+		MessagePacket packet = new MessagePacket();
+		packet.setType(MessagePacket.TYPE_NORMAL);
+		packet.setTo(contact);
+		packet.setFrom(conversation.getAccount().getJid());
+		Element x = packet.addChild("x", "jabber:x:conference");
+		x.setAttribute("jid", conversation.getJid().toBareJid().toString());
+		return packet;
+	}
+
+	public MessagePacket invite(Conversation conversation, Jid contact) {
+		MessagePacket packet = new MessagePacket();
+		packet.setTo(conversation.getJid().toBareJid());
+		packet.setFrom(conversation.getAccount().getJid());
+		Element x = new Element("x");
+		x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
+		Element invite = new Element("invite");
+		invite.setAttribute("to", contact.toBareJid().toString());
+		x.addChild(invite);
+		packet.addChild(x);
+		return packet;
+	}
+
+	public MessagePacket received(Account account,
+			MessagePacket originalMessage, String namespace) {
+		MessagePacket receivedPacket = new MessagePacket();
+		receivedPacket.setType(MessagePacket.TYPE_NORMAL);
+		receivedPacket.setTo(originalMessage.getFrom());
+		receivedPacket.setFrom(account.getJid());
+		Element received = receivedPacket.addChild("received", namespace);
+		received.setAttribute("id", originalMessage.getId());
+		return receivedPacket;
+	}
+
+	public MessagePacket generateOtrError(Jid to, String id) {
+		MessagePacket packet = new MessagePacket();
+		packet.setType(MessagePacket.TYPE_ERROR);
+		packet.setAttribute("id",id);
+		packet.setTo(to);
+		Element error = packet.addChild("error");
+		error.setAttribute("code","406");
+		error.setAttribute("type","modify");
+		error.addChild("not-acceptable","urn:ietf:params:xml:ns:xmpp-stanzas");
+		error.addChild("text").setContent("unreadable OTR message received");
+		return packet;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java b/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java
new file mode 100644
index 00000000..27fdd501
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/generator/PresenceGenerator.java
@@ -0,0 +1,57 @@
+package de.thedevstack.conversationsplus.generator;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+
+public class PresenceGenerator extends AbstractGenerator {
+
+	public PresenceGenerator(XmppConnectionService service) {
+		super(service);
+	}
+
+	private PresencePacket subscription(String type, Contact contact) {
+		PresencePacket packet = new PresencePacket();
+		packet.setAttribute("type", type);
+		packet.setTo(contact.getJid());
+		packet.setFrom(contact.getAccount().getJid().toBareJid());
+		return packet;
+	}
+
+	public PresencePacket requestPresenceUpdatesFrom(Contact contact) {
+		return subscription("subscribe", contact);
+	}
+
+	public PresencePacket stopPresenceUpdatesFrom(Contact contact) {
+		return subscription("unsubscribe", contact);
+	}
+
+	public PresencePacket stopPresenceUpdatesTo(Contact contact) {
+		return subscription("unsubscribed", contact);
+	}
+
+	public PresencePacket sendPresenceUpdatesTo(Contact contact) {
+		return subscription("subscribed", contact);
+	}
+
+	public PresencePacket sendPresence(Account account) {
+		PresencePacket packet = new PresencePacket();
+		packet.setFrom(account.getJid());
+		String sig = account.getPgpSignature();
+		if (sig != null) {
+			packet.addChild("status").setContent("online");
+			packet.addChild("x", "jabber:x:signed").setContent(sig);
+		}
+		String capHash = getCapHash();
+		if (capHash != null) {
+			Element cap = packet.addChild("c",
+					"http://jabber.org/protocol/caps");
+			cap.setAttribute("hash", "sha-1");
+			cap.setAttribute("node", "http://conversions.im");
+			cap.setAttribute("ver", capHash);
+		}
+		return packet;
+	}
+}
+\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/http/HttpConnection.java b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnection.java
new file mode 100644
index 00000000..96b64854
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnection.java
@@ -0,0 +1,310 @@
+package de.thedevstack.conversationsplus.http;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.SystemClock;
+
+import org.apache.http.conn.ssl.StrictHostnameVerifier;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLHandshakeException;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.X509TrustManager;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+
+public class HttpConnection implements Downloadable {
+
+	private HttpConnectionManager mHttpConnectionManager;
+	private XmppConnectionService mXmppConnectionService;
+
+	private URL mUrl;
+	private Message message;
+	private DownloadableFile file;
+	private int mStatus = Downloadable.STATUS_UNKNOWN;
+	private boolean acceptedAutomatically = false;
+	private int mProgress = 0;
+	private long mLastGuiRefresh = 0;
+
+	public HttpConnection(HttpConnectionManager manager) {
+		this.mHttpConnectionManager = manager;
+		this.mXmppConnectionService = manager.getXmppConnectionService();
+	}
+
+	@Override
+	public boolean start() {
+		if (mXmppConnectionService.hasInternetConnection()) {
+			if (this.mStatus == STATUS_OFFER_CHECK_FILESIZE) {
+				checkFileSize(true);
+			} else {
+				new Thread(new FileDownloader(true)).start();
+			}
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	public void init(Message message) {
+		this.message = message;
+		this.message.setDownloadable(this);
+		try {
+			mUrl = new URL(message.getBody());
+			String[] parts = mUrl.getPath().toLowerCase().split("\\.");
+			String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
+			String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
+			if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
+				this.message.setEncryption(Message.ENCRYPTION_PGP);
+			} else if (message.getEncryption() != Message.ENCRYPTION_OTR) {
+				this.message.setEncryption(Message.ENCRYPTION_NONE);
+			}
+			String extension;
+			if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(lastPart)) {
+				extension = secondToLast;
+			} else {
+				extension = lastPart;
+			}
+			message.setRelativeFilePath(message.getUuid()+"."+extension);
+			this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
+			String reference = mUrl.getRef();
+			if (reference != null && reference.length() == 96) {
+				this.file.setKey(CryptoHelper.hexToBytes(reference));
+			}
+
+			if (this.message.getEncryption() == Message.ENCRYPTION_OTR
+					&& this.file.getKey() == null) {
+				this.message.setEncryption(Message.ENCRYPTION_NONE);
+					}
+			checkFileSize(false);
+		} catch (MalformedURLException e) {
+			this.cancel();
+		}
+	}
+
+	private void checkFileSize(boolean interactive) {
+		new Thread(new FileSizeChecker(interactive)).start();
+	}
+
+	public void cancel() {
+		mHttpConnectionManager.finishConnection(this);
+		message.setDownloadable(null);
+		mXmppConnectionService.updateConversationUi();
+	}
+
+	private void finish() {
+		Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+		intent.setData(Uri.fromFile(file));
+		mXmppConnectionService.sendBroadcast(intent);
+		message.setDownloadable(null);
+		mHttpConnectionManager.finishConnection(this);
+		mXmppConnectionService.updateConversationUi();
+		if (acceptedAutomatically) {
+			mXmppConnectionService.getNotificationService().push(message);
+		}
+	}
+
+	private void changeStatus(int status) {
+		this.mStatus = status;
+		mXmppConnectionService.updateConversationUi();
+	}
+
+	private void setupTrustManager(final HttpsURLConnection connection,
+			final boolean interactive) {
+		final X509TrustManager trustManager;
+		final HostnameVerifier hostnameVerifier;
+		if (interactive) {
+			trustManager = mXmppConnectionService.getMemorizingTrustManager();
+			hostnameVerifier = mXmppConnectionService
+				.getMemorizingTrustManager().wrapHostnameVerifier(
+						new StrictHostnameVerifier());
+		} else {
+			trustManager = mXmppConnectionService.getMemorizingTrustManager()
+				.getNonInteractive();
+			hostnameVerifier = mXmppConnectionService
+				.getMemorizingTrustManager()
+				.wrapHostnameVerifierNonInteractive(
+						new StrictHostnameVerifier());
+		}
+		try {
+			final SSLContext sc = SSLContext.getInstance("TLS");
+			sc.init(null, new X509TrustManager[]{trustManager},
+					mXmppConnectionService.getRNG());
+
+			final SSLSocketFactory sf = sc.getSocketFactory();
+			final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+					sf.getSupportedCipherSuites());
+			if (cipherSuites.length > 0) {
+				sc.getDefaultSSLParameters().setCipherSuites(cipherSuites);
+
+			}
+
+			connection.setSSLSocketFactory(sf);
+			connection.setHostnameVerifier(hostnameVerifier);
+		} catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
+		}
+	}
+
+	private class FileSizeChecker implements Runnable {
+
+		private boolean interactive = false;
+
+		public FileSizeChecker(boolean interactive) {
+			this.interactive = interactive;
+		}
+
+		@Override
+		public void run() {
+			long size;
+			try {
+				size = retrieveFileSize();
+			} catch (SSLHandshakeException e) {
+				changeStatus(STATUS_OFFER_CHECK_FILESIZE);
+				HttpConnection.this.acceptedAutomatically = false;
+				HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
+				return;
+			} catch (IOException e) {
+				cancel();
+				return;
+			}
+			file.setExpectedSize(size);
+			if (size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
+				HttpConnection.this.acceptedAutomatically = true;
+				new Thread(new FileDownloader(interactive)).start();
+			} else {
+				changeStatus(STATUS_OFFER);
+				HttpConnection.this.acceptedAutomatically = false;
+				HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
+			}
+		}
+
+		private long retrieveFileSize() throws IOException,
+						SSLHandshakeException {
+							changeStatus(STATUS_CHECKING);
+							HttpURLConnection connection = (HttpURLConnection) mUrl
+								.openConnection();
+							connection.setRequestMethod("HEAD");
+							if (connection instanceof HttpsURLConnection) {
+								setupTrustManager((HttpsURLConnection) connection, interactive);
+							}
+							connection.connect();
+							String contentLength = connection.getHeaderField("Content-Length");
+							if (contentLength == null) {
+								throw new IOException();
+							}
+							try {
+								return Long.parseLong(contentLength, 10);
+							} catch (NumberFormatException e) {
+								throw new IOException();
+							}
+		}
+
+	}
+
+	private class FileDownloader implements Runnable {
+
+		private boolean interactive = false;
+
+		public FileDownloader(boolean interactive) {
+			this.interactive = interactive;
+		}
+
+		@Override
+		public void run() {
+			try {
+				changeStatus(STATUS_DOWNLOADING);
+				download();
+				updateImageBounds();
+				finish();
+			} catch (SSLHandshakeException e) {
+				changeStatus(STATUS_OFFER);
+			} catch (IOException e) {
+				cancel();
+			}
+		}
+
+		private void download() throws SSLHandshakeException, IOException {
+			HttpURLConnection connection = (HttpURLConnection) mUrl
+				.openConnection();
+			if (connection instanceof HttpsURLConnection) {
+				setupTrustManager((HttpsURLConnection) connection, interactive);
+			}
+			connection.connect();
+			BufferedInputStream is = new BufferedInputStream(
+					connection.getInputStream());
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			OutputStream os = file.createOutputStream();
+			if (os == null) {
+				throw new IOException();
+			}
+			long transmitted = 0;
+			long expected = file.getExpectedSize();
+			int count = -1;
+			byte[] buffer = new byte[1024];
+			while ((count = is.read(buffer)) != -1) {
+				transmitted += count;
+				os.write(buffer, 0, count);
+				updateProgress((int) ((((double) transmitted) / expected) * 100));
+			}
+			os.flush();
+			os.close();
+			is.close();
+		}
+
+		private void updateImageBounds() {
+			message.setType(Message.TYPE_IMAGE);
+			mXmppConnectionService.getFileBackend().updateFileParams(message,mUrl);
+			mXmppConnectionService.updateMessage(message);
+		}
+
+	}
+
+	public void updateProgress(int i) {
+		this.mProgress = i;
+		if (SystemClock.elapsedRealtime() - this.mLastGuiRefresh > Config.PROGRESS_UI_UPDATE_INTERVAL) {
+			this.mLastGuiRefresh = SystemClock.elapsedRealtime();
+			mXmppConnectionService.updateConversationUi();
+		}
+	}
+
+	@Override
+	public int getStatus() {
+		return this.mStatus;
+	}
+
+	@Override
+	public long getFileSize() {
+		if (this.file != null) {
+			return this.file.getExpectedSize();
+		} else {
+			return 0;
+		}
+	}
+
+	@Override
+	public int getProgress() {
+		return this.mProgress;
+	}
+
+	@Override
+	public String getMimeType() {
+		return "";
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
new file mode 100644
index 00000000..b41f0793
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
@@ -0,0 +1,28 @@
+package de.thedevstack.conversationsplus.http;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+
+public class HttpConnectionManager extends AbstractConnectionManager {
+
+	public HttpConnectionManager(XmppConnectionService service) {
+		super(service);
+	}
+
+	private List<HttpConnection> connections = new CopyOnWriteArrayList<HttpConnection>();
+
+	public HttpConnection createNewConnection(Message message) {
+		HttpConnection connection = new HttpConnection(this);
+		connection.init(message);
+		this.connections.add(connection);
+		return connection;
+	}
+
+	public void finishConnection(HttpConnection connection) {
+		this.connections.remove(connection);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
new file mode 100644
index 00000000..5ab0faa6
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
@@ -0,0 +1,104 @@
+package de.thedevstack.conversationsplus.parser;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public abstract class AbstractParser {
+
+	protected XmppConnectionService mXmppConnectionService;
+
+	protected AbstractParser(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+    /**
+     * Gets the timestamp from the 'delay' element.
+     * Refer to XEP-0203: Delayed Delivery for details. @link{http://xmpp.org/extensions/xep-0203.html}
+     * @param packet the element to find the child element 'delay' in.
+     * @return the time in milli seconds of the attribute 'stamp' of the
+     *  element 'delay'. In case there is no 'delay' element or no 'stamp'
+     *  attribute or the current time is less than the value of the 'stamp'
+     *  attribute the current time is returned.
+     */
+	protected long getTimestamp(Element packet) {
+		long now = System.currentTimeMillis();
+		Element delay = packet.findChild("delay");
+		if (delay == null) {
+			return now;
+		}
+		String stamp = delay.getAttribute("stamp");
+		if (stamp == null) {
+			return now;
+		}
+        /*long time = parseTimestamp(stamp).getTime();
+        return now < time ? now : time;*/
+        try {
+            long time = parseTimestamp(stamp).getTime();
+            return now < time ? now : time;
+        } catch (ParseException e) {
+            return now;
+        }
+	}
+
+    /**
+     * Parses the timestamp according to XEP-0082: XMPP Date and Time Profiles.
+     * @link{http://xmpp.org/extensions/xep-0082.html}
+     *
+     * @param timestamp the timestamp to parse
+     * @return Date
+     * @throws ParseException
+     */
+	public static Date parseTimestamp(String timestamp) throws ParseException {
+        /*try {
+            Log.d("TIMESTAMP", timestamp);
+            return DatatypeFactory.newInstance().newXMLGregorianCalendar(timestamp).toGregorianCalendar().getTime();
+        } catch (DatatypeConfigurationException e) {
+            Log.d("TIMESTAMP", e.getMessage());
+            return new Date();
+        }*/
+        timestamp = timestamp.replace("Z", "+0000");
+        SimpleDateFormat dateFormat;
+        timestamp = timestamp.substring(0,19)+timestamp.substring(timestamp.length() -5,timestamp.length());
+        dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ",Locale.US);
+        return dateFormat.parse(timestamp);
+	}
+
+	protected void updateLastseen(final Element packet, final Account account,
+			final boolean presenceOverwrite) {
+		final Jid from = packet.getAttributeAsJid("from");
+        updateLastseen(packet, account, from, presenceOverwrite);
+    }
+
+    protected void updateLastseen(final Element packet, final Account account, final Jid from,
+                                  final boolean presenceOverwrite) {
+		final String presence = from == null || from.isBareJid() ? "" : from.getResourcepart();
+		final Contact contact = account.getRoster().getContact(from);
+		final long timestamp = getTimestamp(packet);
+		if (timestamp >= contact.lastseen.time) {
+			contact.lastseen.time = timestamp;
+			if (!presence.isEmpty() && presenceOverwrite) {
+				contact.lastseen.presence = presence;
+			}
+		}
+	}
+
+	protected String avatarData(Element items) {
+		Element item = items.findChild("item");
+		if (item == null) {
+			return null;
+		}
+		Element data = item.findChild("data", "urn:xmpp:avatar:data");
+		if (data == null) {
+			return null;
+		}
+		return data.getContent();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java
new file mode 100644
index 00000000..f76dbf03
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/IqParser.java
@@ -0,0 +1,158 @@
+package de.thedevstack.conversationsplus.parser;
+
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.Xmlns;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class IqParser extends AbstractParser implements OnIqPacketReceived {
+
+	public IqParser(final XmppConnectionService service) {
+		super(service);
+	}
+
+	private void rosterItems(final Account account, final Element query) {
+		final String version = query.getAttribute("ver");
+		if (version != null) {
+			account.getRoster().setVersion(version);
+		}
+		for (final Element item : query.getChildren()) {
+			if (item.getName().equals("item")) {
+				final Jid jid = item.getAttributeAsJid("jid");
+				if (jid == null) {
+					continue;
+				}
+				final String name = item.getAttribute("name");
+				final String subscription = item.getAttribute("subscription");
+				final Contact contact = account.getRoster().getContact(jid);
+				if (!contact.getOption(Contact.Options.DIRTY_PUSH)) {
+					contact.setServerName(name);
+					contact.parseGroupsFromElement(item);
+				}
+				if (subscription != null) {
+					if (subscription.equals("remove")) {
+						contact.resetOption(Contact.Options.IN_ROSTER);
+						contact.resetOption(Contact.Options.DIRTY_DELETE);
+						contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
+					} else {
+						contact.setOption(Contact.Options.IN_ROSTER);
+						contact.resetOption(Contact.Options.DIRTY_PUSH);
+						contact.parseSubscriptionFromElement(item);
+					}
+				}
+				mXmppConnectionService.getAvatarService().clear(contact);
+			}
+		}
+		mXmppConnectionService.updateConversationUi();
+		mXmppConnectionService.updateRosterUi();
+	}
+
+	public String avatarData(final IqPacket packet) {
+		final Element pubsub = packet.findChild("pubsub",
+				"http://jabber.org/protocol/pubsub");
+		if (pubsub == null) {
+			return null;
+		}
+		final Element items = pubsub.findChild("items");
+		if (items == null) {
+			return null;
+		}
+		return super.avatarData(items);
+	}
+
+	@Override
+	public void onIqPacketReceived(final Account account, final IqPacket packet) {
+		if (packet.hasChild("query", Xmlns.ROSTER) && packet.fromServer(account)) {
+			final Element query = packet.findChild("query");
+			// If this is in response to a query for the whole roster:
+			if (packet.getType() == IqPacket.TYPE.RESULT) {
+				account.getRoster().markAllAsNotInRoster();
+			}
+			this.rosterItems(account, query);
+		} else if ((packet.hasChild("block", Xmlns.BLOCKING) || packet.hasChild("blocklist", Xmlns.BLOCKING)) &&
+				packet.fromServer(account)) {
+			// Block list or block push.
+			Log.d(Config.LOGTAG, "Received blocklist update from server");
+			final Element blocklist = packet.findChild("blocklist", Xmlns.BLOCKING);
+			final Element block = packet.findChild("block", Xmlns.BLOCKING);
+			final Collection<Element> items = blocklist != null ? blocklist.getChildren() :
+				(block != null ? block.getChildren() : null);
+			// If this is a response to a blocklist query, clear the block list and replace with the new one.
+			// Otherwise, just update the existing blocklist.
+			if (packet.getType() == IqPacket.TYPE.RESULT) {
+				account.clearBlocklist();
+				account.getXmppConnection().getFeatures().setBlockListRequested(true);
+			}
+			if (items != null) {
+				final Collection<Jid> jids = new ArrayList<>(items.size());
+				// Create a collection of Jids from the packet
+				for (final Element item : items) {
+					if (item.getName().equals("item")) {
+						final Jid jid = item.getAttributeAsJid("jid");
+						if (jid != null) {
+							jids.add(jid);
+						}
+					}
+				}
+				account.getBlocklist().addAll(jids);
+			}
+			// Update the UI
+			mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
+		} else if (packet.hasChild("unblock", Xmlns.BLOCKING) &&
+				packet.fromServer(account) && packet.getType() == IqPacket.TYPE.SET) {
+			Log.d(Config.LOGTAG, "Received unblock update from server");
+			final Collection<Element> items = packet.findChild("unblock", Xmlns.BLOCKING).getChildren();
+			if (items.size() == 0) {
+				// No children to unblock == unblock all
+				account.getBlocklist().clear();
+			} else {
+				final Collection<Jid> jids = new ArrayList<>(items.size());
+				for (final Element item : items) {
+					if (item.getName().equals("item")) {
+						final Jid jid = item.getAttributeAsJid("jid");
+						if (jid != null) {
+							jids.add(jid);
+						}
+					}
+				}
+				account.getBlocklist().removeAll(jids);
+			}
+			mXmppConnectionService.updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
+		} else if (packet.hasChild("open", "http://jabber.org/protocol/ibb")
+				|| packet.hasChild("data", "http://jabber.org/protocol/ibb")) {
+			mXmppConnectionService.getJingleConnectionManager()
+				.deliverIbbPacket(account, packet);
+		} else if (packet.hasChild("query", "http://jabber.org/protocol/disco#info")) {
+			final IqPacket response = mXmppConnectionService.getIqGenerator().discoResponse(packet);
+			mXmppConnectionService.sendIqPacket(account, response, null);
+		} else if (packet.hasChild("query","jabber:iq:version")) {
+			final IqPacket response = mXmppConnectionService.getIqGenerator().versionResponse(packet);
+			mXmppConnectionService.sendIqPacket(account,response,null);
+		} else if (packet.hasChild("ping", "urn:xmpp:ping")) {
+			final IqPacket response = packet.generateResponse(IqPacket.TYPE.RESULT);
+			mXmppConnectionService.sendIqPacket(account, response, null);
+		} else {
+			if ((packet.getType() == IqPacket.TYPE.GET)
+					|| (packet.getType() == IqPacket.TYPE.SET)) {
+				final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
+				final Element error = response.addChild("error");
+				error.setAttribute("type", "cancel");
+				error.addChild("feature-not-implemented",
+						"urn:ietf:params:xml:ns:xmpp-stanzas");
+				account.getXmppConnection().sendIqPacket(response, null);
+					}
+		}
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
new file mode 100644
index 00000000..67ff94d2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
@@ -0,0 +1,653 @@
+package de.thedevstack.conversationsplus.parser;
+
+import net.java.otr4j.session.Session;
+import net.java.otr4j.session.SessionStatus;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.http.HttpConnectionManager;
+import de.thedevstack.conversationsplus.services.MessageArchiveService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnMessagePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+
+public class MessageParser extends AbstractParser implements
+		OnMessagePacketReceived {
+	public MessageParser(XmppConnectionService service) {
+		super(service);
+	}
+
+	private boolean extractChatState(Conversation conversation, final Element element) {
+		ChatState state = ChatState.parse(element);
+		if (state != null && conversation != null) {
+			final Account account = conversation.getAccount();
+			Jid from = element.getAttributeAsJid("from");
+			if (from != null && from.toBareJid().equals(account.getJid().toBareJid())) {
+				conversation.setOutgoingChatState(state);
+				return false;
+			} else {
+				return conversation.setIncomingChatState(state);
+			}
+		}
+		return false;
+	}
+
+	private Message parseChat(MessagePacket packet, Account account) {
+		final Jid jid = packet.getFrom();
+		if (jid == null) {
+			return null;
+		}
+		Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid.toBareJid(), false);
+		String pgpBody = getPgpBody(packet);
+		Message finishedMessage;
+		if (pgpBody != null) {
+			finishedMessage = new Message(conversation,
+					pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECEIVED);
+		} else {
+			finishedMessage = new Message(conversation,
+					packet.getBody(), Message.ENCRYPTION_NONE,
+					Message.STATUS_RECEIVED);
+		}
+		finishedMessage.setRemoteMsgId(packet.getId());
+		finishedMessage.markable = isMarkable(packet);
+		if (conversation.getMode() == Conversation.MODE_MULTI
+				&& !jid.isBareJid()) {
+			final Jid trueCounterpart = conversation.getMucOptions()
+					.getTrueCounterpart(jid.getResourcepart());
+			if (trueCounterpart != null) {
+				updateLastseen(packet, account, trueCounterpart, false);
+			}
+			finishedMessage.setType(Message.TYPE_PRIVATE);
+			finishedMessage.setTrueCounterpart(trueCounterpart);
+			if (conversation.hasDuplicateMessage(finishedMessage)) {
+				return null;
+			}
+		} else {
+			updateLastseen(packet, account, true);
+		}
+		finishedMessage.setCounterpart(jid);
+		finishedMessage.setTime(getTimestamp(packet));
+		extractChatState(conversation,packet);
+		return finishedMessage;
+	}
+
+	private Message parseOtrChat(MessagePacket packet, Account account) {
+		final Jid to = packet.getTo();
+		final Jid from = packet.getFrom();
+		if (to == null || from == null) {
+			return null;
+		}
+		boolean properlyAddressed = !to.isBareJid() || account.countPresences() == 1;
+		Conversation conversation = mXmppConnectionService
+				.findOrCreateConversation(account, from.toBareJid(), false);
+		String presence;
+		if (from.isBareJid()) {
+			presence = "";
+		} else {
+			presence = from.getResourcepart();
+		}
+		extractChatState(conversation, packet);
+		updateLastseen(packet, account, true);
+		String body = packet.getBody();
+		if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
+			conversation.endOtrIfNeeded();
+		}
+		if (!conversation.hasValidOtrSession()) {
+			if (properlyAddressed) {
+				conversation.startOtrSession(presence,false);
+			} else {
+				return null;
+			}
+		} else {
+			String foreignPresence = conversation.getOtrSession()
+					.getSessionID().getUserID();
+			if (!foreignPresence.equals(presence)) {
+				conversation.endOtrIfNeeded();
+				if (properlyAddressed) {
+					conversation.startOtrSession(presence, false);
+				} else {
+					return null;
+				}
+			}
+		}
+		try {
+			conversation.setLastReceivedOtrMessageId(packet.getId());
+			Session otrSession = conversation.getOtrSession();
+			SessionStatus before = otrSession.getSessionStatus();
+			body = otrSession.transformReceiving(body);
+			SessionStatus after = otrSession.getSessionStatus();
+			if ((before != after) && (after == SessionStatus.ENCRYPTED)) {
+				conversation.setNextEncryption(Message.ENCRYPTION_OTR);
+				mXmppConnectionService.onOtrSessionEstablished(conversation);
+			} else if ((before != after) && (after == SessionStatus.FINISHED)) {
+				conversation.setNextEncryption(Message.ENCRYPTION_NONE);
+				conversation.resetOtrSession();
+				mXmppConnectionService.updateConversationUi();
+			}
+			if ((body == null) || (body.isEmpty())) {
+				return null;
+			}
+			if (body.startsWith(CryptoHelper.FILETRANSFER)) {
+				String key = body.substring(CryptoHelper.FILETRANSFER.length());
+				conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
+				return null;
+			}
+			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR,
+					Message.STATUS_RECEIVED);
+			finishedMessage.setTime(getTimestamp(packet));
+			finishedMessage.setRemoteMsgId(packet.getId());
+			finishedMessage.markable = isMarkable(packet);
+			finishedMessage.setCounterpart(from);
+			conversation.setLastReceivedOtrMessageId(null);
+			return finishedMessage;
+		} catch (Exception e) {
+			conversation.resetOtrSession();
+			return null;
+		}
+	}
+
+	private Message parseGroupchat(MessagePacket packet, Account account) {
+		int status;
+		final Jid from = packet.getFrom();
+		if (from == null) {
+			return null;
+		}
+		if (mXmppConnectionService.find(account.pendingConferenceLeaves,
+				account, from.toBareJid()) != null) {
+			return null;
+		}
+		Conversation conversation = mXmppConnectionService
+				.findOrCreateConversation(account, from.toBareJid(), true);
+		final Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(from.getResourcepart());
+		if (trueCounterpart != null) {
+			updateLastseen(packet, account, trueCounterpart, false);
+		}
+		if (packet.hasChild("subject")) {
+			conversation.setHasMessagesLeftOnServer(true);
+			conversation.getMucOptions().setSubject(packet.findChild("subject").getContent());
+			mXmppConnectionService.updateConversationUi();
+			return null;
+		}
+
+		final Element x = packet.findChild("x", "http://jabber.org/protocol/muc#user");
+		if (from.isBareJid() && (x == null || !x.hasChild("status"))) {
+			return null;
+		} else if (from.isBareJid() && x.hasChild("status")) {
+			for(Element child : x.getChildren()) {
+				if (child.getName().equals("status")) {
+					String code = child.getAttribute("code");
+					if (code.contains(MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED)) {
+						mXmppConnectionService.fetchConferenceConfiguration(conversation);
+					}
+				}
+			}
+			return null;
+		}
+
+		if (from.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
+			if (mXmppConnectionService.markMessage(conversation,
+					packet.getId(), Message.STATUS_SEND_RECEIVED)) {
+				return null;
+			} else if (packet.getId() == null) {
+				Message message = conversation.findSentMessageWithBody(packet.getBody());
+				if (message != null) {
+					mXmppConnectionService.markMessage(message,Message.STATUS_SEND_RECEIVED);
+					return null;
+				} else {
+					status = Message.STATUS_SEND;
+				}
+			} else {
+				status = Message.STATUS_SEND;
+			}
+		} else {
+			status = Message.STATUS_RECEIVED;
+		}
+		String pgpBody = getPgpBody(packet);
+		Message finishedMessage;
+		if (pgpBody == null) {
+			finishedMessage = new Message(conversation,
+					packet.getBody(), Message.ENCRYPTION_NONE, status);
+		} else {
+			finishedMessage = new Message(conversation, pgpBody,
+					Message.ENCRYPTION_PGP, status);
+		}
+		finishedMessage.setRemoteMsgId(packet.getId());
+		finishedMessage.markable = isMarkable(packet);
+		finishedMessage.setCounterpart(from);
+		if (status == Message.STATUS_RECEIVED) {
+			finishedMessage.setTrueCounterpart(conversation.getMucOptions()
+					.getTrueCounterpart(from.getResourcepart()));
+		}
+		if (packet.hasChild("delay")
+				&& conversation.hasDuplicateMessage(finishedMessage)) {
+			return null;
+		}
+		finishedMessage.setTime(getTimestamp(packet));
+		return finishedMessage;
+	}
+
+	private Message parseCarbonMessage(final MessagePacket packet, final Account account) {
+		int status;
+		final Jid fullJid;
+		Element forwarded;
+		if (packet.hasChild("received", "urn:xmpp:carbons:2")) {
+			forwarded = packet.findChild("received", "urn:xmpp:carbons:2")
+					.findChild("forwarded", "urn:xmpp:forward:0");
+			status = Message.STATUS_RECEIVED;
+		} else if (packet.hasChild("sent", "urn:xmpp:carbons:2")) {
+			forwarded = packet.findChild("sent", "urn:xmpp:carbons:2")
+					.findChild("forwarded", "urn:xmpp:forward:0");
+			status = Message.STATUS_SEND;
+		} else {
+			return null;
+		}
+		if (forwarded == null) {
+			return null;
+		}
+		Element message = forwarded.findChild("message");
+		if (message == null) {
+			return null;
+		}
+		if (!message.hasChild("body")) {
+			if (status == Message.STATUS_RECEIVED
+					&& message.getAttribute("from") != null) {
+				parseNonMessage(message, account);
+			} else if (status == Message.STATUS_SEND
+					&& message.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
+				final Jid to = message.getAttributeAsJid("to");
+				if (to != null) {
+					final Conversation conversation = mXmppConnectionService.find(
+							mXmppConnectionService.getConversations(), account,
+							to.toBareJid());
+					if (conversation != null) {
+						mXmppConnectionService.markRead(conversation);
+					}
+				}
+			}
+			return null;
+		}
+		if (status == Message.STATUS_RECEIVED) {
+			fullJid = message.getAttributeAsJid("from");
+			if (fullJid == null) {
+				return null;
+			} else {
+				updateLastseen(message, account, true);
+			}
+		} else {
+			fullJid = message.getAttributeAsJid("to");
+			if (fullJid == null) {
+				return null;
+			}
+		}
+		if (message.hasChild("x","http://jabber.org/protocol/muc#user")
+				&& "chat".equals(message.getAttribute("type"))) {
+			return null;
+		}
+		Conversation conversation = mXmppConnectionService
+				.findOrCreateConversation(account, fullJid.toBareJid(), false);
+		String pgpBody = getPgpBody(message);
+		Message finishedMessage;
+		if (pgpBody != null) {
+			finishedMessage = new Message(conversation, pgpBody,
+					Message.ENCRYPTION_PGP, status);
+		} else {
+			String body = message.findChild("body").getContent();
+			finishedMessage = new Message(conversation, body,
+					Message.ENCRYPTION_NONE, status);
+		}
+		extractChatState(conversation,message);
+		finishedMessage.setTime(getTimestamp(message));
+		finishedMessage.setRemoteMsgId(message.getAttribute("id"));
+		finishedMessage.markable = isMarkable(message);
+		finishedMessage.setCounterpart(fullJid);
+		if (conversation.getMode() == Conversation.MODE_MULTI
+				&& !fullJid.isBareJid()) {
+			finishedMessage.setType(Message.TYPE_PRIVATE);
+			finishedMessage.setTrueCounterpart(conversation.getMucOptions()
+					.getTrueCounterpart(fullJid.getResourcepart()));
+			if (conversation.hasDuplicateMessage(finishedMessage)) {
+				return null;
+			}
+		}
+		return finishedMessage;
+	}
+
+	private Message parseMamMessage(MessagePacket packet, final Account account) {
+		final Element result = packet.findChild("result","urn:xmpp:mam:0");
+		if (result == null ) {
+			return null;
+		}
+		final MessageArchiveService.Query query = this.mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
+		if (query!=null) {
+			query.incrementTotalCount();
+		}
+		final Element forwarded = result.findChild("forwarded","urn:xmpp:forward:0");
+		if (forwarded == null) {
+			return null;
+		}
+		final Element message = forwarded.findChild("message");
+		if (message == null) {
+			return null;
+		}
+		final Element body = message.findChild("body");
+		if (body == null || message.hasChild("private","urn:xmpp:carbons:2") || message.hasChild("no-copy","urn:xmpp:hints")) {
+			return null;
+		}
+		int encryption;
+		String content = getPgpBody(message);
+		if (content != null) {
+			encryption = Message.ENCRYPTION_PGP;
+		} else {
+			encryption = Message.ENCRYPTION_NONE;
+			content = body.getContent();
+		}
+		if (content == null) {
+			return null;
+		}
+		final long timestamp = getTimestamp(forwarded);
+		final Jid to = message.getAttributeAsJid("to");
+		final Jid from = message.getAttributeAsJid("from");
+		Jid counterpart;
+		int status;
+		Conversation conversation;
+		if (from!=null && to != null && from.toBareJid().equals(account.getJid().toBareJid())) {
+			status = Message.STATUS_SEND;
+			conversation = this.mXmppConnectionService.findOrCreateConversation(account,to.toBareJid(),false,query);
+			counterpart = to;
+		} else if (from !=null && to != null) {
+			status = Message.STATUS_RECEIVED;
+			conversation = this.mXmppConnectionService.findOrCreateConversation(account,from.toBareJid(),false,query);
+			counterpart = from;
+		} else {
+			return null;
+		}
+		Message finishedMessage = new Message(conversation,content,encryption,status);
+		finishedMessage.setTime(timestamp);
+		finishedMessage.setCounterpart(counterpart);
+		finishedMessage.setRemoteMsgId(message.getAttribute("id"));
+		finishedMessage.setServerMsgId(result.getAttribute("id"));
+		if (conversation.hasDuplicateMessage(finishedMessage)) {
+			return null;
+		}
+		if (query!=null) {
+			query.incrementMessageCount();
+		}
+		return finishedMessage;
+	}
+
+	private void parseError(final MessagePacket packet, final Account account) {
+		final Jid from = packet.getFrom();
+		mXmppConnectionService.markMessage(account, from.toBareJid(),
+				packet.getId(), Message.STATUS_SEND_FAILED);
+	}
+
+	private void parseNonMessage(Element packet, Account account) {
+		final Jid from = packet.getAttributeAsJid("from");
+		if (extractChatState(from == null ? null : mXmppConnectionService.find(account,from), packet)) {
+			mXmppConnectionService.updateConversationUi();
+		}
+		Element invite = extractInvite(packet);
+		if (invite != null) {
+			Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, from, true);
+			if (!conversation.getMucOptions().online()) {
+				Element password = invite.findChild("password");
+				conversation.getMucOptions().setPassword(password == null ? null : password.getContent());
+				mXmppConnectionService.databaseBackend.updateConversation(conversation);
+				mXmppConnectionService.joinMuc(conversation);
+				mXmppConnectionService.updateConversationUi();
+			}
+		}
+		if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
+			Element event = packet.findChild("event",
+					"http://jabber.org/protocol/pubsub#event");
+			parseEvent(event, from, account);
+		} else if (from != null && packet.hasChild("displayed", "urn:xmpp:chat-markers:0")) {
+			String id = packet
+					.findChild("displayed", "urn:xmpp:chat-markers:0")
+					.getAttribute("id");
+			updateLastseen(packet, account, true);
+			final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), id, Message.STATUS_SEND_DISPLAYED);
+			Message message = displayedMessage == null ? null :displayedMessage.prev();
+			while (message != null
+					&& message.getStatus() == Message.STATUS_SEND_RECEIVED
+					&& message.getTimeSent() < displayedMessage.getTimeSent()) {
+				mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
+				message = message.prev();
+			}
+		} else if (from != null
+				&& packet.hasChild("received", "urn:xmpp:chat-markers:0")) {
+			String id = packet.findChild("received", "urn:xmpp:chat-markers:0")
+					.getAttribute("id");
+			updateLastseen(packet, account, false);
+			mXmppConnectionService.markMessage(account, from.toBareJid(),
+					id, Message.STATUS_SEND_RECEIVED);
+		} else if (from != null
+				&& packet.hasChild("received", "urn:xmpp:receipts")) {
+			String id = packet.findChild("received", "urn:xmpp:receipts")
+					.getAttribute("id");
+			updateLastseen(packet, account, false);
+			mXmppConnectionService.markMessage(account, from.toBareJid(),
+					id, Message.STATUS_SEND_RECEIVED);
+		}
+	}
+
+	private Element extractInvite(Element message) {
+		Element x = message.findChild("x","http://jabber.org/protocol/muc#user");
+		if (x == null) {
+			x = message.findChild("x","jabber:x:conference");
+		}
+		if (x != null && x.hasChild("invite")) {
+			return x;
+		} else {
+			return null;
+		}
+	}
+
+	private void parseEvent(final Element event, final Jid from, final Account account) {
+		Element items = event.findChild("items");
+		if (items == null) {
+			return;
+		}
+		String node = items.getAttribute("node");
+		if (node == null) {
+			return;
+		}
+		if (node.equals("urn:xmpp:avatar:metadata")) {
+			Avatar avatar = Avatar.parseMetadata(items);
+			if (avatar != null) {
+				avatar.owner = from;
+				if (mXmppConnectionService.getFileBackend().isAvatarCached(
+						avatar)) {
+					if (account.getJid().toBareJid().equals(from)) {
+						if (account.setAvatar(avatar.getFilename())) {
+							mXmppConnectionService.databaseBackend
+									.updateAccount(account);
+						}
+						mXmppConnectionService.getAvatarService().clear(
+								account);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateAccountUi();
+					} else {
+						Contact contact = account.getRoster().getContact(
+								from);
+						contact.setAvatar(avatar.getFilename());
+						mXmppConnectionService.getAvatarService().clear(
+								contact);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateRosterUi();
+					}
+				} else {
+					mXmppConnectionService.fetchAvatar(account, avatar);
+				}
+			}
+		} else if (node.equals("http://jabber.org/protocol/nick")) {
+			Element item = items.findChild("item");
+			if (item != null) {
+				Element nick = item.findChild("nick",
+						"http://jabber.org/protocol/nick");
+				if (nick != null) {
+					if (from != null) {
+						Contact contact = account.getRoster().getContact(
+								from);
+						contact.setPresenceName(nick.getContent());
+						mXmppConnectionService.getAvatarService().clear(account);
+						mXmppConnectionService.updateConversationUi();
+						mXmppConnectionService.updateAccountUi();
+					}
+				}
+			}
+		}
+	}
+
+	private String getPgpBody(Element message) {
+		Element child = message.findChild("x", "jabber:x:encrypted");
+		if (child == null) {
+			return null;
+		} else {
+			return child.getContent();
+		}
+	}
+
+	private boolean isMarkable(Element message) {
+		return message.hasChild("markable", "urn:xmpp:chat-markers:0");
+	}
+
+	@Override
+	public void onMessagePacketReceived(Account account, MessagePacket packet) {
+		Message message = null;
+		this.parseNick(packet, account);
+		if ((packet.getType() == MessagePacket.TYPE_CHAT || packet.getType() == MessagePacket.TYPE_NORMAL)) {
+			if ((packet.getBody() != null)
+					&& (packet.getBody().startsWith("?OTR"))) {
+				message = this.parseOtrChat(packet, account);
+				if (message != null) {
+					message.markUnread();
+				}
+			} else if (packet.hasChild("body") && extractInvite(packet) == null) {
+				message = this.parseChat(packet, account);
+				if (message != null) {
+					message.markUnread();
+				}
+			} else if (packet.hasChild("received", "urn:xmpp:carbons:2")
+					|| (packet.hasChild("sent", "urn:xmpp:carbons:2"))) {
+				message = this.parseCarbonMessage(packet, account);
+				if (message != null) {
+					if (message.getStatus() == Message.STATUS_SEND) {
+						account.activateGracePeriod();
+						mXmppConnectionService.markRead(message.getConversation());
+					} else {
+						message.markUnread();
+					}
+				}
+			} else if (packet.hasChild("result","urn:xmpp:mam:0")) {
+				message = parseMamMessage(packet, account);
+				if (message != null) {
+					Conversation conversation = message.getConversation();
+					conversation.add(message);
+					mXmppConnectionService.databaseBackend.createMessage(message);
+				}
+				return;
+			} else if (packet.hasChild("fin","urn:xmpp:mam:0")) {
+				Element fin = packet.findChild("fin","urn:xmpp:mam:0");
+				mXmppConnectionService.getMessageArchiveService().processFin(fin);
+			} else {
+				parseNonMessage(packet, account);
+			}
+		} else if (packet.getType() == MessagePacket.TYPE_GROUPCHAT) {
+			message = this.parseGroupchat(packet, account);
+			if (message != null) {
+				if (message.getStatus() == Message.STATUS_RECEIVED) {
+					message.markUnread();
+				} else {
+					mXmppConnectionService.markRead(message.getConversation());
+					account.activateGracePeriod();
+				}
+			}
+		} else if (packet.getType() == MessagePacket.TYPE_ERROR) {
+			this.parseError(packet, account);
+			return;
+		} else if (packet.getType() == MessagePacket.TYPE_HEADLINE) {
+			this.parseHeadline(packet, account);
+			return;
+		}
+		if ((message == null) || (message.getBody() == null)) {
+			return;
+		}
+		if ((Settings.CONFIRM_MESSAGE_RECEIVED)
+				&& ((packet.getId() != null))) {
+			if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
+				MessagePacket receipt = mXmppConnectionService
+						.getMessageGenerator().received(account, packet,
+								"urn:xmpp:chat-markers:0");
+				mXmppConnectionService.sendMessagePacket(account, receipt);
+			}
+			if (packet.hasChild("request", "urn:xmpp:receipts")) {
+				MessagePacket receipt = mXmppConnectionService
+						.getMessageGenerator().received(account, packet,
+								"urn:xmpp:receipts");
+				mXmppConnectionService.sendMessagePacket(account, receipt);
+			}
+		}
+		Conversation conversation = message.getConversation();
+		conversation.add(message);
+		if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
+			if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
+				mXmppConnectionService.updateConversation(conversation);
+			}
+		}
+
+		if (message.getStatus() == Message.STATUS_RECEIVED
+				&& conversation.getOtrSession() != null
+				&& !conversation.getOtrSession().getSessionID().getUserID()
+				.equals(message.getCounterpart().getResourcepart())) {
+			conversation.endOtrIfNeeded();
+		}
+
+		if (packet.getType() != MessagePacket.TYPE_ERROR) {
+			if (message.getEncryption() == Message.ENCRYPTION_NONE
+					|| mXmppConnectionService.saveEncryptedMessages()) {
+				mXmppConnectionService.databaseBackend.createMessage(message);
+			}
+		}
+		final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
+		if (message.trusted()
+                && Settings.DOWNLOAD_IMAGE_LINKS
+                && mXmppConnectionService.isDownloadAllowedInConnection()
+                && message.bodyContainsDownloadable()
+                && manager.getAutoAcceptFileSize() > 0) {
+			manager.createNewConnection(message);
+		} else if (!message.isRead()) {
+			mXmppConnectionService.getNotificationService().push(message);
+		}
+		mXmppConnectionService.updateConversationUi();
+	}
+
+	private void parseHeadline(MessagePacket packet, Account account) {
+		if (packet.hasChild("event", "http://jabber.org/protocol/pubsub#event")) {
+			Element event = packet.findChild("event",
+					"http://jabber.org/protocol/pubsub#event");
+			parseEvent(event, packet.getFrom(), account);
+		}
+	}
+
+	private void parseNick(MessagePacket packet, Account account) {
+		Element nick = packet.findChild("nick",
+				"http://jabber.org/protocol/nick");
+		if (nick != null) {
+			if (packet.getFrom() != null) {
+				Contact contact = account.getRoster().getContact(
+						packet.getFrom());
+				contact.setPresenceName(nick.getContent());
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java b/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
new file mode 100644
index 00000000..cfa09fd7
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
@@ -0,0 +1,118 @@
+package de.thedevstack.conversationsplus.parser;
+
+import java.util.ArrayList;
+
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.generator.PresenceGenerator;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnPresencePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+
+public class PresenceParser extends AbstractParser implements
+		OnPresencePacketReceived {
+
+	public PresenceParser(XmppConnectionService service) {
+		super(service);
+	}
+
+	public void parseConferencePresence(PresencePacket packet, Account account) {
+		PgpEngine mPgpEngine = mXmppConnectionService.getPgpEngine();
+		final Conversation conversation = packet.getFrom() == null ? null : mXmppConnectionService.find(account, packet.getFrom().toBareJid());
+		if (conversation != null) {
+			final MucOptions mucOptions = conversation.getMucOptions();
+			boolean before = mucOptions.online();
+			int count = mucOptions.getUsers().size();
+			final ArrayList<MucOptions.User> tileUserBefore = new ArrayList<>(mucOptions.getUsers().subList(0,Math.min(mucOptions.getUsers().size(),5)));
+			mucOptions.processPacket(packet, mPgpEngine);
+			final ArrayList<MucOptions.User> tileUserAfter = new ArrayList<>(mucOptions.getUsers().subList(0,Math.min(mucOptions.getUsers().size(),5)));
+			if (!tileUserAfter.equals(tileUserBefore)) {
+				mXmppConnectionService.getAvatarService().clear(conversation);
+			}
+			if (before != mucOptions.online() || (mucOptions.online() && count != mucOptions.getUsers().size())) {
+				mXmppConnectionService.updateConversationUi();
+			} else if (mucOptions.online()) {
+				mXmppConnectionService.updateMucRosterUi();
+			}
+		}
+	}
+
+	public void parseContactPresence(PresencePacket packet, Account account) {
+		PresenceGenerator mPresenceGenerator = mXmppConnectionService
+				.getPresenceGenerator();
+		if (packet.getFrom() == null) {
+			return;
+		}
+		final Jid from = packet.getFrom();
+		String type = packet.getAttribute("type");
+		Contact contact = account.getRoster().getContact(packet.getFrom());
+		if (type == null) {
+			String presence;
+			if (!from.isBareJid()) {
+				presence = from.getResourcepart();
+			} else {
+				presence = "";
+			}
+			int sizeBefore = contact.getPresences().size();
+			contact.updatePresence(presence,
+					Presences.parseShow(packet.findChild("show")));
+			PgpEngine pgp = mXmppConnectionService.getPgpEngine();
+			if (pgp != null) {
+				Element x = packet.findChild("x", "jabber:x:signed");
+				if (x != null) {
+					Element status = packet.findChild("status");
+					String msg;
+					if (status != null) {
+						msg = status.getContent();
+					} else {
+						msg = "";
+					}
+					contact.setPgpKeyId(pgp.fetchKeyId(account, msg,
+							x.getContent()));
+				}
+			}
+			boolean online = sizeBefore < contact.getPresences().size();
+			updateLastseen(packet, account, false);
+			mXmppConnectionService.onContactStatusChanged.onContactStatusChanged(contact, online);
+		} else if (type.equals("unavailable")) {
+			if (from.isBareJid()) {
+				contact.clearPresences();
+			} else {
+				contact.removePresence(from.getResourcepart());
+			}
+			mXmppConnectionService.onContactStatusChanged
+					.onContactStatusChanged(contact, false);
+		} else if (type.equals("subscribe")) {
+			if (contact.getOption(Contact.Options.PREEMPTIVE_GRANT)) {
+				mXmppConnectionService.sendPresencePacket(account,
+						mPresenceGenerator.sendPresenceUpdatesTo(contact));
+			} else {
+				contact.setOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST);
+			}
+		}
+		Element nick = packet.findChild("nick",
+				"http://jabber.org/protocol/nick");
+		if (nick != null) {
+			contact.setPresenceName(nick.getContent());
+		}
+		mXmppConnectionService.updateRosterUi();
+	}
+
+	@Override
+	public void onPresencePacketReceived(Account account, PresencePacket packet) {
+		if (packet.hasChild("x", "http://jabber.org/protocol/muc#user")) {
+			this.parseConferencePresence(packet, account);
+		} else if (packet.hasChild("x", "http://jabber.org/protocol/muc")) {
+			this.parseConferencePresence(packet, account);
+		} else {
+			this.parseContactPresence(packet, account);
+		}
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
new file mode 100644
index 00000000..bee19e4f
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
@@ -0,0 +1,400 @@
+package de.thedevstack.conversationsplus.persistance;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Roster;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteCantOpenDatabaseException;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+public class DatabaseBackend extends SQLiteOpenHelper {
+
+	private static DatabaseBackend instance = null;
+
+	private static final String DATABASE_NAME = "history";
+	private static final int DATABASE_VERSION = 13;
+
+	private static String CREATE_CONTATCS_STATEMENT = "create table "
+			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
+			+ Contact.SERVERNAME + " TEXT, " + Contact.SYSTEMNAME + " TEXT,"
+			+ Contact.JID + " TEXT," + Contact.KEYS + " TEXT,"
+			+ Contact.PHOTOURI + " TEXT," + Contact.OPTIONS + " NUMBER,"
+			+ Contact.SYSTEMACCOUNT + " NUMBER, " + Contact.AVATAR + " TEXT, "
+            + Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
+			+ Contact.GROUPS + " TEXT, FOREIGN KEY(" + Contact.ACCOUNT + ") REFERENCES "
+			+ Account.TABLENAME + "(" + Account.UUID
+			+ ") ON DELETE CASCADE, UNIQUE(" + Contact.ACCOUNT + ", "
+			+ Contact.JID + ") ON CONFLICT REPLACE);";
+
+	private DatabaseBackend(Context context) {
+		super(context, DATABASE_NAME, null, DATABASE_VERSION);
+	}
+
+	@Override
+	public void onCreate(SQLiteDatabase db) {
+		db.execSQL("PRAGMA foreign_keys=ON;");
+		db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID
+				+ " TEXT PRIMARY KEY," + Account.USERNAME + " TEXT,"
+				+ Account.SERVER + " TEXT," + Account.PASSWORD + " TEXT,"
+				+ Account.ROSTERVERSION + " TEXT," + Account.OPTIONS
+				+ " NUMBER, " + Account.AVATAR + " TEXT, " + Account.KEYS
+				+ " TEXT)");
+		db.execSQL("create table " + Conversation.TABLENAME + " ("
+				+ Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
+				+ " TEXT, " + Conversation.CONTACT + " TEXT, "
+				+ Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACTJID
+				+ " TEXT, " + Conversation.CREATED + " NUMBER, "
+				+ Conversation.STATUS + " NUMBER, " + Conversation.MODE
+				+ " NUMBER, " + Conversation.ATTRIBUTES + " TEXT, FOREIGN KEY("
+				+ Conversation.ACCOUNT + ") REFERENCES " + Account.TABLENAME
+				+ "(" + Account.UUID + ") ON DELETE CASCADE);");
+		db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
+				+ " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, "
+				+ Message.TIME_SENT + " NUMBER, " + Message.COUNTERPART
+				+ " TEXT, " + Message.TRUE_COUNTERPART + " TEXT,"
+				+ Message.BODY + " TEXT, " + Message.ENCRYPTION + " NUMBER, "
+				+ Message.STATUS + " NUMBER," + Message.TYPE + " NUMBER, "
+				+ Message.RELATIVE_FILE_PATH + " TEXT, "
+				+ Message.SERVER_MSG_ID + " TEXT, "
+				+ Message.REMOTE_MSG_ID + " TEXT, FOREIGN KEY("
+				+ Message.CONVERSATION + ") REFERENCES "
+				+ Conversation.TABLENAME + "(" + Conversation.UUID
+				+ ") ON DELETE CASCADE);");
+
+		db.execSQL(CREATE_CONTATCS_STATEMENT);
+	}
+
+	@Override
+	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+		if (oldVersion < 2 && newVersion >= 2) {
+			db.execSQL("update " + Account.TABLENAME + " set "
+					+ Account.OPTIONS + " = " + Account.OPTIONS + " | 8");
+		}
+		if (oldVersion < 3 && newVersion >= 3) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.TYPE + " NUMBER");
+		}
+		if (oldVersion < 5 && newVersion >= 5) {
+			db.execSQL("DROP TABLE " + Contact.TABLENAME);
+			db.execSQL(CREATE_CONTATCS_STATEMENT);
+			db.execSQL("UPDATE " + Account.TABLENAME + " SET "
+					+ Account.ROSTERVERSION + " = NULL");
+		}
+		if (oldVersion < 6 && newVersion >= 6) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.TRUE_COUNTERPART + " TEXT");
+		}
+		if (oldVersion < 7 && newVersion >= 7) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.REMOTE_MSG_ID + " TEXT");
+			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+					+ Contact.AVATAR + " TEXT");
+			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN "
+					+ Account.AVATAR + " TEXT");
+		}
+		if (oldVersion < 8 && newVersion >= 8) {
+			db.execSQL("ALTER TABLE " + Conversation.TABLENAME + " ADD COLUMN "
+					+ Conversation.ATTRIBUTES + " TEXT");
+		}
+        if (oldVersion < 9 && newVersion >= 9) {
+            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+                    + Contact.LAST_TIME + " NUMBER");
+            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+                    + Contact.LAST_PRESENCE + " TEXT");
+        }
+		if (oldVersion < 10 && newVersion >= 10) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.RELATIVE_FILE_PATH + " TEXT");
+		}
+		if (oldVersion < 11 && newVersion >= 11) {
+			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
+					+ Contact.GROUPS + " TEXT");
+			db.execSQL("delete from "+Contact.TABLENAME);
+			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
+		}
+		if (oldVersion < 12 && newVersion >= 12) {
+			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
+					+ Message.SERVER_MSG_ID + " TEXT");
+		}
+		if (oldVersion < 13 && newVersion >= 13) {
+			db.execSQL("delete from "+Contact.TABLENAME);
+			db.execSQL("update "+Account.TABLENAME+" set "+Account.ROSTERVERSION+" = NULL");
+		}
+	}
+
+	public static synchronized DatabaseBackend getInstance(Context context) {
+		if (instance == null) {
+			instance = new DatabaseBackend(context);
+		}
+		return instance;
+	}
+
+	public void createConversation(Conversation conversation) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
+	}
+
+	public void createMessage(Message message) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		db.insert(Message.TABLENAME, null, message.getContentValues());
+	}
+
+	public void createAccount(Account account) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		db.insert(Account.TABLENAME, null, account.getContentValues());
+	}
+
+	public void createContact(Contact contact) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		db.insert(Contact.TABLENAME, null, contact.getContentValues());
+	}
+
+	public int getConversationCount() {
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor = db.rawQuery("select count(uuid) as count from "
+				+ Conversation.TABLENAME + " where " + Conversation.STATUS
+				+ "=" + Conversation.STATUS_AVAILABLE, null);
+		cursor.moveToFirst();
+		int count = cursor.getInt(0);
+		cursor.close();
+		return count;
+	}
+
+	public CopyOnWriteArrayList<Conversation> getConversations(int status) {
+		CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<>();
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = { Integer.toString(status) };
+		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
+				+ " where " + Conversation.STATUS + " = ? order by "
+				+ Conversation.CREATED + " desc", selectionArgs);
+		while (cursor.moveToNext()) {
+			list.add(Conversation.fromCursor(cursor));
+		}
+		cursor.close();
+		return list;
+	}
+
+	public ArrayList<Message> getMessages(Conversation conversations, int limit) {
+		return getMessages(conversations, limit, -1);
+	}
+
+	public ArrayList<Message> getMessages(Conversation conversation, int limit,
+			long timestamp) {
+		ArrayList<Message> list = new ArrayList<>();
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor;
+		if (timestamp == -1) {
+			String[] selectionArgs = { conversation.getUuid() };
+			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
+					+ "=?", selectionArgs, null, null, Message.TIME_SENT
+					+ " DESC", String.valueOf(limit));
+		} else {
+			String[] selectionArgs = { conversation.getUuid(),
+					Long.toString(timestamp) };
+			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
+					+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
+					null, null, Message.TIME_SENT + " DESC",
+					String.valueOf(limit));
+		}
+		if (cursor.getCount() > 0) {
+			cursor.moveToLast();
+			do {
+				Message message = Message.fromCursor(cursor);
+				message.setConversation(conversation);
+				list.add(message);
+			} while (cursor.moveToPrevious());
+		}
+		cursor.close();
+		return list;
+	}
+
+	public Conversation findConversation(final Account account, final Jid contactJid) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = { account.getUuid(),
+				contactJid.toBareJid().toString() + "/%",
+				contactJid.toBareJid().toString()
+				};
+		Cursor cursor = db.query(Conversation.TABLENAME, null,
+				Conversation.ACCOUNT + "=? AND (" + Conversation.CONTACTJID
+						+ " like ? OR "+Conversation.CONTACTJID+"=?)", selectionArgs, null, null, null);
+		if (cursor.getCount() == 0)
+			return null;
+		cursor.moveToFirst();
+		Conversation conversation = Conversation.fromCursor(cursor);
+		cursor.close();
+		return conversation;
+	}
+
+	public void updateConversation(final Conversation conversation) {
+		final SQLiteDatabase db = this.getWritableDatabase();
+		final String[] args = { conversation.getUuid() };
+		db.update(Conversation.TABLENAME, conversation.getContentValues(),
+				Conversation.UUID + "=?", args);
+	}
+
+	public List<Account> getAccounts() {
+		List<Account> list = new ArrayList<>();
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
+				null, null);
+		while (cursor.moveToNext()) {
+			list.add(Account.fromCursor(cursor));
+		}
+		cursor.close();
+		return list;
+	}
+
+	public void updateAccount(Account account) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = { account.getUuid() };
+		db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
+				+ "=?", args);
+	}
+
+	public void deleteAccount(Account account) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = { account.getUuid() };
+		db.delete(Account.TABLENAME, Account.UUID + "=?", args);
+	}
+
+	public boolean hasEnabledAccounts() {
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor = db.rawQuery("select count(" + Account.UUID + ")  from "
+				+ Account.TABLENAME + " where not options & (1 <<1)", null);
+		try {
+			cursor.moveToFirst();
+			int count = cursor.getInt(0);
+			cursor.close();
+			return (count > 0);
+		} catch (SQLiteCantOpenDatabaseException e) {
+			return true; // better safe than sorry
+		} catch (RuntimeException e) {
+			return true; // better safe than sorry
+		}
+	}
+
+	@Override
+	public SQLiteDatabase getWritableDatabase() {
+		SQLiteDatabase db = super.getWritableDatabase();
+		db.execSQL("PRAGMA foreign_keys=ON;");
+		return db;
+	}
+
+	public void updateMessage(Message message) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = { message.getUuid() };
+		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
+				+ "=?", args);
+	}
+
+	public void readRoster(Roster roster) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor;
+		String args[] = { roster.getAccount().getUuid() };
+		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?",
+				args, null, null, null);
+		while (cursor.moveToNext()) {
+			roster.initContact(Contact.fromCursor(cursor));
+		}
+		cursor.close();
+	}
+
+	public void writeRoster(final Roster roster) {
+		final Account account = roster.getAccount();
+		final SQLiteDatabase db = this.getWritableDatabase();
+		for (Contact contact : roster.getContacts()) {
+			if (contact.getOption(Contact.Options.IN_ROSTER)) {
+				db.insert(Contact.TABLENAME, null, contact.getContentValues());
+			} else {
+				String where = Contact.ACCOUNT + "=? AND " + Contact.JID + "=?";
+				String[] whereArgs = { account.getUuid(), contact.getJid().toString() };
+				db.delete(Contact.TABLENAME, where, whereArgs);
+			}
+		}
+		account.setRosterVersion(roster.getVersion());
+		updateAccount(account);
+	}
+
+	public void deleteMessage(Message message) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = { message.getUuid() };
+		db.delete(Message.TABLENAME, Message.UUID + "=?", args);
+	}
+
+	public void deleteMessagesInConversation(Conversation conversation) {
+		SQLiteDatabase db = this.getWritableDatabase();
+		String[] args = { conversation.getUuid() };
+		db.delete(Message.TABLENAME, Message.CONVERSATION + "=?", args);
+	}
+
+	public Conversation findConversationByUuid(String conversationUuid) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = { conversationUuid };
+		Cursor cursor = db.query(Conversation.TABLENAME, null,
+				Conversation.UUID + "=?", selectionArgs, null, null, null);
+		if (cursor.getCount() == 0) {
+			return null;
+		}
+		cursor.moveToFirst();
+		Conversation conversation = Conversation.fromCursor(cursor);
+		cursor.close();
+		return conversation;
+	}
+
+	public Message findMessageByUuid(String messageUuid) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = { messageUuid };
+		Cursor cursor = db.query(Message.TABLENAME, null, Message.UUID + "=?",
+				selectionArgs, null, null, null);
+		if (cursor.getCount() == 0) {
+			return null;
+		}
+		cursor.moveToFirst();
+		Message message = Message.fromCursor(cursor);
+		cursor.close();
+		return message;
+	}
+
+	public Account findAccountByUuid(String accountUuid) {
+		SQLiteDatabase db = this.getReadableDatabase();
+		String[] selectionArgs = { accountUuid };
+		Cursor cursor = db.query(Account.TABLENAME, null, Account.UUID + "=?",
+				selectionArgs, null, null, null);
+		if (cursor.getCount() == 0) {
+			return null;
+		}
+		cursor.moveToFirst();
+		Account account = Account.fromCursor(cursor);
+		cursor.close();
+		return account;
+	}
+
+	public List<Message> getImageMessages(Conversation conversation) {
+		ArrayList<Message> list = new ArrayList<>();
+		SQLiteDatabase db = this.getReadableDatabase();
+		Cursor cursor;
+			String[] selectionArgs = { conversation.getUuid(), String.valueOf(Message.TYPE_IMAGE) };
+			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
+					+ "=? AND "+Message.TYPE+"=?", selectionArgs, null, null,null);
+		if (cursor.getCount() > 0) {
+			cursor.moveToLast();
+			do {
+				Message message = Message.fromCursor(cursor);
+				message.setConversation(conversation);
+				list.add(message);
+			} while (cursor.moveToPrevious());
+		}
+		cursor.close();
+		return list;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
new file mode 100644
index 00000000..e3bf58c7
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
@@ -0,0 +1,525 @@
+package de.thedevstack.conversationsplus.persistance;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.security.DigestOutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.RectF;
+import android.net.Uri;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.util.Base64;
+import android.util.Base64OutputStream;
+import android.util.Log;
+import android.webkit.MimeTypeMap;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.ExifHelper;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+
+public class FileBackend {
+
+	private static int IMAGE_SIZE = 1920;
+
+	private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
+			"yyyyMMdd_HHmmssSSS", Locale.US);
+
+	private XmppConnectionService mXmppConnectionService;
+
+	public FileBackend(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public DownloadableFile getFile(Message message) {
+		return getFile(message, true);
+	}
+
+	public DownloadableFile getFile(Message message, boolean decrypted) {
+		String path = message.getRelativeFilePath();
+		String extension;
+		if (path != null && !path.isEmpty()) {
+			String[] parts = path.split("\\.");
+			extension = "."+parts[parts.length - 1];
+		} else {
+			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_TEXT) {
+				extension = ".webp";
+			} else {
+				extension = "";
+			}
+			path = message.getUuid()+extension;
+		}
+		final boolean encrypted = !decrypted
+				&& (message.getEncryption() == Message.ENCRYPTION_PGP
+				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
+		if (encrypted) {
+			return new DownloadableFile(getConversationsFileDirectory()+message.getUuid()+extension+".pgp");
+		} else {
+			if (path.startsWith("/")) {
+				return new DownloadableFile(path);
+			} else {
+				if (message.getType() == Message.TYPE_FILE) {
+					return new DownloadableFile(getConversationsFileDirectory() + path);
+				} else {
+					return new DownloadableFile(getConversationsImageDirectory()+path);
+				}
+			}
+		}
+	}
+
+	public static String getConversationsFileDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
+	}
+
+	public static String getConversationsImageDirectory() {
+		return Environment.getExternalStoragePublicDirectory(
+			Environment.DIRECTORY_PICTURES).getAbsolutePath()
+			+ "/Conversations/";
+	}
+
+	public Bitmap resize(Bitmap originalBitmap, int size) {
+		int w = originalBitmap.getWidth();
+		int h = originalBitmap.getHeight();
+		if (Math.max(w, h) > size) {
+			int scalledW;
+			int scalledH;
+			if (w <= h) {
+				scalledW = (int) (w / ((double) h / size));
+				scalledH = size;
+			} else {
+				scalledW = size;
+				scalledH = (int) (h / ((double) w / size));
+			}
+			Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
+					scalledW, scalledH, true);
+			return scalledBitmap;
+		} else {
+			return originalBitmap;
+		}
+	}
+
+	public Bitmap rotate(Bitmap bitmap, int degree) {
+		int w = bitmap.getWidth();
+		int h = bitmap.getHeight();
+		Matrix mtx = new Matrix();
+		mtx.postRotate(degree);
+		return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
+	}
+
+	public String getOriginalPath(Uri uri) {
+		String path = null;
+		if (uri.getScheme().equals("file")) {
+			return uri.getPath();
+		} else if (uri.toString().startsWith("content://media/")) {
+			String[] projection = {MediaStore.MediaColumns.DATA};
+			Cursor metaCursor = mXmppConnectionService.getContentResolver().query(uri,
+					projection, null, null, null);
+			if (metaCursor != null) {
+				try {
+					if (metaCursor.moveToFirst()) {
+						path = metaCursor.getString(0);
+					}
+				} finally {
+					metaCursor.close();
+				}
+			}
+		}
+		return path;
+	}
+
+	public DownloadableFile copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
+		try {
+			Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
+			String mime = mXmppConnectionService.getContentResolver().getType(uri);
+			String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
+			message.setRelativeFilePath(message.getUuid() + "." + extension);
+			DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			OutputStream os = new FileOutputStream(file);
+			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(uri);
+			byte[] buffer = new byte[1024];
+            int length;
+            while ((length = is.read(buffer)) > 0) {
+				os.write(buffer, 0, length);
+            }
+			os.flush();
+			os.close();
+			is.close();
+			Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
+			return file;
+		} catch (FileNotFoundException e) {
+			throw new FileCopyException(R.string.error_file_not_found);
+		} catch (IOException e) {
+			throw new FileCopyException(R.string.error_io_exception);
+		}
+	}
+
+	public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
+			throws FileCopyException {
+		return this.copyImageToPrivateStorage(message, image, 0);
+	}
+
+	private DownloadableFile copyImageToPrivateStorage(Message message,
+			Uri image, int sampleSize) throws FileCopyException {
+		try {
+			InputStream is = mXmppConnectionService.getContentResolver()
+					.openInputStream(image);
+			DownloadableFile file = getFile(message);
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			Bitmap originalBitmap;
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			int inSampleSize = (int) Math.pow(2, sampleSize);
+			Log.d(Config.LOGTAG, "reading bitmap with sample size "
+					+ inSampleSize);
+			options.inSampleSize = inSampleSize;
+			originalBitmap = BitmapFactory.decodeStream(is, null, options);
+			is.close();
+			if (originalBitmap == null) {
+				throw new FileCopyException(R.string.error_not_an_image_file);
+			}
+			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
+			originalBitmap = null;
+			int rotation = getRotation(image);
+			if (rotation > 0) {
+				scalledBitmap = rotate(scalledBitmap, rotation);
+			}
+			OutputStream os = new FileOutputStream(file);
+			boolean success = scalledBitmap.compress(
+					Bitmap.CompressFormat.WEBP, 75, os);
+			if (!success) {
+				throw new FileCopyException(R.string.error_compressing_image);
+			}
+			os.flush();
+			os.close();
+			long size = file.getSize();
+			int width = scalledBitmap.getWidth();
+			int height = scalledBitmap.getHeight();
+			message.setBody(Long.toString(size) + ',' + width + ',' + height);
+			return file;
+		} catch (FileNotFoundException e) {
+			throw new FileCopyException(R.string.error_file_not_found);
+		} catch (IOException e) {
+			throw new FileCopyException(R.string.error_io_exception);
+		} catch (SecurityException e) {
+			throw new FileCopyException(
+					R.string.error_security_exception_during_image_copy);
+		} catch (OutOfMemoryError e) {
+			++sampleSize;
+			if (sampleSize <= 3) {
+				return copyImageToPrivateStorage(message, image, sampleSize);
+			} else {
+				throw new FileCopyException(R.string.error_out_of_memory);
+			}
+		}
+	}
+
+	private int getRotation(Uri image) {
+		try {
+			InputStream is = mXmppConnectionService.getContentResolver()
+					.openInputStream(image);
+			return ExifHelper.getOrientation(is);
+		} catch (FileNotFoundException e) {
+			return 0;
+		}
+	}
+
+	public Bitmap getImageFromMessage(Message message) {
+		return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
+	}
+
+	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
+			throws FileNotFoundException {
+		Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
+				message.getUuid());
+		if ((thumbnail == null) && (!cacheOnly)) {
+			File file = getFile(message);
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(file, size);
+			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
+					options);
+			if (fullsize == null) {
+				throw new FileNotFoundException();
+			}
+			thumbnail = resize(fullsize, size);
+			this.mXmppConnectionService.getBitmapCache().put(message.getUuid(),
+					thumbnail);
+		}
+		return thumbnail;
+	}
+
+	public Uri getTakePhotoUri() {
+		StringBuilder pathBuilder = new StringBuilder();
+		pathBuilder.append(Environment
+				.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
+		pathBuilder.append('/');
+		pathBuilder.append("Camera");
+		pathBuilder.append('/');
+		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date())
+				+ ".jpg");
+		Uri uri = Uri.parse("file://" + pathBuilder.toString());
+		File file = new File(uri.toString());
+		file.getParentFile().mkdirs();
+		return uri;
+	}
+
+	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
+		try {
+			Avatar avatar = new Avatar();
+			Bitmap bm = cropCenterSquare(image, size);
+			if (bm == null) {
+				return null;
+			}
+			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
+			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
+					mByteArrayOutputStream, Base64.DEFAULT);
+			MessageDigest digest = MessageDigest.getInstance("SHA-1");
+			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
+					mBase64OutputSttream, digest);
+			if (!bm.compress(format, 75, mDigestOutputStream)) {
+				return null;
+			}
+			mDigestOutputStream.flush();
+			mDigestOutputStream.close();
+			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
+			avatar.image = new String(mByteArrayOutputStream.toByteArray());
+			return avatar;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (IOException e) {
+			return null;
+		}
+	}
+
+	public boolean isAvatarCached(Avatar avatar) {
+		File file = new File(getAvatarPath(avatar.getFilename()));
+		return file.exists();
+	}
+
+	public boolean save(Avatar avatar) {
+		File file;
+		if (isAvatarCached(avatar)) {
+			file = new File(getAvatarPath(avatar.getFilename()));
+		} else {
+			String filename = getAvatarPath(avatar.getFilename());
+			file = new File(filename + ".tmp");
+			file.getParentFile().mkdirs();
+			try {
+				file.createNewFile();
+				FileOutputStream mFileOutputStream = new FileOutputStream(file);
+				MessageDigest digest = MessageDigest.getInstance("SHA-1");
+				digest.reset();
+				DigestOutputStream mDigestOutputStream = new DigestOutputStream(
+						mFileOutputStream, digest);
+				mDigestOutputStream.write(avatar.getImageAsBytes());
+				mDigestOutputStream.flush();
+				mDigestOutputStream.close();
+				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
+				if (sha1sum.equals(avatar.sha1sum)) {
+					file.renameTo(new File(filename));
+				} else {
+					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
+					file.delete();
+					return false;
+				}
+			} catch (FileNotFoundException e) {
+				return false;
+			} catch (IOException e) {
+				return false;
+			} catch (NoSuchAlgorithmException e) {
+				return false;
+			}
+		}
+		avatar.size = file.length();
+		return true;
+	}
+
+	public String getAvatarPath(String avatar) {
+		return mXmppConnectionService.getFilesDir().getAbsolutePath()
+				+ "/avatars/" + avatar;
+	}
+
+	public Uri getAvatarUri(String avatar) {
+		return Uri.parse("file:" + getAvatarPath(avatar));
+	}
+
+	public Bitmap cropCenterSquare(Uri image, int size) {
+		if (image == null) {
+			return null;
+		}
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image, size);
+			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			Bitmap input = BitmapFactory.decodeStream(is, null, options);
+			if (input == null) {
+				return null;
+			} else {
+				int rotation = getRotation(image);
+				if (rotation > 0) {
+					input = rotate(input, rotation);
+				}
+				return cropCenterSquare(input, size);
+			}
+		} catch (FileNotFoundException e) {
+			return null;
+		}
+	}
+
+	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
+		if (image == null) {
+			return null;
+		}
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image,Math.max(newHeight, newWidth));
+			InputStream is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			Bitmap source = BitmapFactory.decodeStream(is, null, options);
+
+			int sourceWidth = source.getWidth();
+			int sourceHeight = source.getHeight();
+			float xScale = (float) newWidth / sourceWidth;
+			float yScale = (float) newHeight / sourceHeight;
+			float scale = Math.max(xScale, yScale);
+			float scaledWidth = scale * sourceWidth;
+			float scaledHeight = scale * sourceHeight;
+			float left = (newWidth - scaledWidth) / 2;
+			float top = (newHeight - scaledHeight) / 2;
+
+			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
+			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, source.getConfig());
+			Canvas canvas = new Canvas(dest);
+			canvas.drawBitmap(source, null, targetRect, null);
+			return dest;
+		} catch (FileNotFoundException e) {
+			return null;
+		}
+
+	}
+
+	public Bitmap cropCenterSquare(Bitmap input, int size) {
+		int w = input.getWidth();
+		int h = input.getHeight();
+
+		float scale = Math.max((float) size / h, (float) size / w);
+
+		float outWidth = scale * w;
+		float outHeight = scale * h;
+		float left = (size - outWidth) / 2;
+		float top = (size - outHeight) / 2;
+		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
+
+		Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
+		Canvas canvas = new Canvas(output);
+		canvas.drawBitmap(input, null, target, null);
+		return output;
+	}
+
+	private int calcSampleSize(Uri image, int size) throws FileNotFoundException {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
+		return calcSampleSize(options, size);
+	}
+
+	private int calcSampleSize(File image, int size) {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
+		return calcSampleSize(options, size);
+	}
+
+	private int calcSampleSize(BitmapFactory.Options options, int size) {
+		int height = options.outHeight;
+		int width = options.outWidth;
+		int inSampleSize = 1;
+
+		if (height > size || width > size) {
+			int halfHeight = height / 2;
+			int halfWidth = width / 2;
+
+			while ((halfHeight / inSampleSize) > size
+					&& (halfWidth / inSampleSize) > size) {
+				inSampleSize *= 2;
+			}
+		}
+		return inSampleSize;
+	}
+
+	public Uri getJingleFileUri(Message message) {
+		File file = getFile(message);
+		return Uri.parse("file://" + file.getAbsolutePath());
+	}
+
+	public void updateFileParams(Message message) {
+		updateFileParams(message,null);
+	}
+
+	public void updateFileParams(Message message, URL url) {
+		DownloadableFile file = getFile(message);
+		if (message.getType() == Message.TYPE_IMAGE || file.getMimeType().startsWith("image/")) {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inJustDecodeBounds = true;
+			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+			int imageHeight = options.outHeight;
+			int imageWidth = options.outWidth;
+			if (url == null) {
+				message.setBody(Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
+			} else {
+				message.setBody(url.toString()+"|"+Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
+			}
+		} else {
+			message.setBody(Long.toString(file.getSize()));
+		}
+
+	}
+
+	public class FileCopyException extends Exception {
+		private static final long serialVersionUID = -1010013599132881427L;
+		private int resId;
+
+		public FileCopyException(int resId) {
+			this.resId = resId;
+		}
+
+		public int getResId() {
+			return resId;
+		}
+	}
+
+	public Bitmap getAvatar(String avatar, int size) {
+		if (avatar == null) {
+			return null;
+		}
+		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
+		if (bm == null) {
+			return null;
+		}
+		return bm;
+	}
+
+	public boolean isFileAvailable(Message message) {
+		return getFile(message).exists();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/persistance/OnPhoneContactsMerged.java b/src/main/java/de/thedevstack/conversationsplus/persistance/OnPhoneContactsMerged.java
new file mode 100644
index 00000000..cfbb6ef1
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/persistance/OnPhoneContactsMerged.java
@@ -0,0 +1,5 @@
+package de.thedevstack.conversationsplus.persistance;
+
+public interface OnPhoneContactsMerged {
+	public void phoneContactsMerged();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java
new file mode 100644
index 00000000..0dedc01d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/AbstractConnectionManager.java
@@ -0,0 +1,23 @@
+package de.thedevstack.conversationsplus.services;
+
+public class AbstractConnectionManager {
+	protected XmppConnectionService mXmppConnectionService;
+
+	public AbstractConnectionManager(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public XmppConnectionService getXmppConnectionService() {
+		return this.mXmppConnectionService;
+	}
+
+	public long getAutoAcceptFileSize() {
+		String config = this.mXmppConnectionService.getPreferences().getString(
+				"auto_accept_file_size", "524288");
+		try {
+			return Long.parseLong(config);
+		} catch (NumberFormatException e) {
+			return 524288;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java b/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java
new file mode 100644
index 00000000..7321fc08
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/AvatarService.java
@@ -0,0 +1,295 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.Typeface;
+import android.net.Uri;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Bookmark;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+
+public class AvatarService {
+
+	private static final int FG_COLOR = 0xFFFAFAFA;
+	private static final int TRANSPARENT = 0x00000000;
+	private static final int PLACEHOLDER_COLOR = 0xFF202020;
+
+	private static final String PREFIX_CONTACT = "contact";
+	private static final String PREFIX_CONVERSATION = "conversation";
+	private static final String PREFIX_ACCOUNT = "account";
+	private static final String PREFIX_GENERIC = "generic";
+
+	final private ArrayList<Integer> sizes = new ArrayList<>();
+
+	protected XmppConnectionService mXmppConnectionService = null;
+
+	public AvatarService(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	private Bitmap get(final Contact contact, final int size, boolean cachedOnly) {
+		final String KEY = key(contact, size);
+		Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
+		if (avatar != null || cachedOnly) {
+			return avatar;
+		}
+		if (contact.getProfilePhoto() != null) {
+			avatar = mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size);
+		}
+		if (avatar == null && contact.getAvatar() != null) {
+			avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatar(), size);
+		}
+		if (avatar == null) {
+            avatar = get(contact.getDisplayName(), size, cachedOnly);
+		}
+		this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
+		return avatar;
+	}
+
+	public void clear(Contact contact) {
+		synchronized (this.sizes) {
+			for (Integer size : sizes) {
+				this.mXmppConnectionService.getBitmapCache().remove(
+						key(contact, size));
+			}
+		}
+	}
+
+	private String key(Contact contact, int size) {
+		synchronized (this.sizes) {
+			if (!this.sizes.contains(size)) {
+				this.sizes.add(size);
+			}
+		}
+		return PREFIX_CONTACT + "_" + contact.getAccount().getJid().toBareJid() + "_"
+				+ contact.getJid() + "_" + String.valueOf(size);
+	}
+
+	public Bitmap get(ListItem item, int size) {
+		return get(item,size,false);
+	}
+
+	public Bitmap get(ListItem item, int size, boolean cachedOnly) {
+		if (item instanceof Contact) {
+			return get((Contact) item, size,cachedOnly);
+		} else if (item instanceof Bookmark) {
+			Bookmark bookmark = (Bookmark) item;
+			if (bookmark.getConversation() != null) {
+				return get(bookmark.getConversation(), size, cachedOnly);
+			} else {
+				return get(bookmark.getDisplayName(), size, cachedOnly);
+			}
+		} else {
+			return get(item.getDisplayName(), size, cachedOnly);
+		}
+	}
+
+	public Bitmap get(Conversation conversation, int size) {
+		return get(conversation,size,false);
+	}
+
+	public Bitmap get(Conversation conversation, int size, boolean cachedOnly) {
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			return get(conversation.getContact(), size, cachedOnly);
+		} else {
+			return get(conversation.getMucOptions(), size, cachedOnly);
+		}
+	}
+
+	public void clear(Conversation conversation) {
+		if (conversation.getMode() == Conversation.MODE_SINGLE) {
+			clear(conversation.getContact());
+		} else {
+			clear(conversation.getMucOptions());
+		}
+	}
+
+	private Bitmap get(MucOptions mucOptions, int size,  boolean cachedOnly) {
+		final String KEY = key(mucOptions, size);
+		Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
+		if (bitmap != null || cachedOnly) {
+			return bitmap;
+		}
+		final List<MucOptions.User> users = new ArrayList<>(mucOptions.getUsers());
+		int count = users.size();
+		bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(bitmap);
+		bitmap.eraseColor(TRANSPARENT);
+
+		if (count == 0) {
+			String name = mucOptions.getConversation().getName();
+			final String letter = name.isEmpty() ? "X" : name.substring(0,1);
+			final int color = UIHelper.getColorForName(name);
+			drawTile(canvas, letter, color, 0, 0, size, size);
+		} else if (count == 1) {
+			drawTile(canvas, users.get(0), 0, 0, size, size);
+		} else if (count == 2) {
+			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
+			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
+		} else if (count == 3) {
+			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
+			drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
+			drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
+					size);
+		} else if (count == 4) {
+			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
+			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
+			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
+			drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
+					size);
+		} else {
+			drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
+			drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
+			drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
+			drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
+					size, size);
+		}
+		this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
+		return bitmap;
+	}
+
+	public void clear(MucOptions options) {
+		synchronized (this.sizes) {
+			for (Integer size : sizes) {
+				this.mXmppConnectionService.getBitmapCache().remove(
+						key(options, size));
+			}
+		}
+	}
+
+	private String key(MucOptions options, int size) {
+		synchronized (this.sizes) {
+			if (!this.sizes.contains(size)) {
+				this.sizes.add(size);
+			}
+		}
+		return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid()
+				+ "_" + String.valueOf(size);
+	}
+
+	public Bitmap get(Account account, int size) {
+		final String KEY = key(account, size);
+		Bitmap avatar = mXmppConnectionService.getBitmapCache().get(KEY);
+		if (avatar != null) {
+			return avatar;
+		}
+		avatar = mXmppConnectionService.getFileBackend().getAvatar(
+				account.getAvatar(), size);
+		if (avatar == null) {
+			avatar = get(account.getJid().toBareJid().toString(), size,false);
+		}
+		mXmppConnectionService.getBitmapCache().put(KEY, avatar);
+		return avatar;
+	}
+
+	public void clear(Account account) {
+		synchronized (this.sizes) {
+			for (Integer size : sizes) {
+				this.mXmppConnectionService.getBitmapCache().remove(
+						key(account, size));
+			}
+		}
+	}
+
+	private String key(Account account, int size) {
+		synchronized (this.sizes) {
+			if (!this.sizes.contains(size)) {
+				this.sizes.add(size);
+			}
+		}
+		return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
+				+ String.valueOf(size);
+	}
+
+	public Bitmap get(String name, int size) {
+		return get(name,size,false);
+	}
+
+	public Bitmap get(final String name, final int size, boolean cachedOnly) {
+		final String KEY = key(name, size);
+		Bitmap bitmap = mXmppConnectionService.getBitmapCache().get(KEY);
+		if (bitmap != null || cachedOnly) {
+			return bitmap;
+		}
+		bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(bitmap);
+		final String trimmedName = name.trim();
+		final String letter = trimmedName.isEmpty() ? "X" : trimmedName.substring(0,1);
+		final int color = UIHelper.getColorForName(name);
+		drawTile(canvas, letter, color, 0, 0, size, size);
+		mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
+		return bitmap;
+	}
+
+	private String key(String name, int size) {
+		synchronized (this.sizes) {
+			if (!this.sizes.contains(size)) {
+				this.sizes.add(size);
+			}
+		}
+		return PREFIX_GENERIC + "_" + name + "_" + String.valueOf(size);
+	}
+
+	private void drawTile(Canvas canvas, String letter, int tileColor,
+						  int left, int top, int right, int bottom) {
+		letter = letter.toUpperCase(Locale.getDefault());
+		Paint tilePaint = new Paint(), textPaint = new Paint();
+		tilePaint.setColor(tileColor);
+		textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
+		textPaint.setColor(FG_COLOR);
+		textPaint.setTypeface(Typeface.create("sans-serif-light",
+				Typeface.NORMAL));
+		textPaint.setTextSize((float) ((right - left) * 0.8));
+		Rect rect = new Rect();
+
+		canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
+		textPaint.getTextBounds(letter, 0, 1, rect);
+		float width = textPaint.measureText(letter);
+		canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
+				/ 2 + rect.height() / 2, textPaint);
+	}
+
+	private void drawTile(Canvas canvas, MucOptions.User user, int left,
+						  int top, int right, int bottom) {
+		Contact contact = user.getContact();
+		if (contact != null) {
+			Uri uri = null;
+			if (contact.getProfilePhoto() != null) {
+				uri = Uri.parse(contact.getProfilePhoto());
+			} else if (contact.getAvatar() != null) {
+				uri = mXmppConnectionService.getFileBackend().getAvatarUri(
+						contact.getAvatar());
+			}
+			if (uri != null) {
+				Bitmap bitmap = mXmppConnectionService.getFileBackend()
+						.cropCenter(uri, bottom - top, right - left);
+				if (bitmap != null) {
+					drawTile(canvas, bitmap, left, top, right, bottom);
+					return;
+				}
+			}
+		}
+		String name = contact != null ? contact.getDisplayName() : user.getName();
+		final String letter = name.isEmpty() ? "X" : name.substring(0,1);
+		final int color = UIHelper.getColorForName(name);
+		drawTile(canvas, letter, color, left, top, right, bottom);
+	}
+
+	private void drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop,
+						  int dstright, int dstbottom) {
+		Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
+		canvas.drawBitmap(bm, null, dst, null);
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java b/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java
new file mode 100644
index 00000000..4367dd1b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/EventReceiver.java
@@ -0,0 +1,24 @@
+package de.thedevstack.conversationsplus.services;
+
+import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class EventReceiver extends BroadcastReceiver {
+	@Override
+	public void onReceive(Context context, Intent intent) {
+		Intent mIntentForService = new Intent(context,
+				XmppConnectionService.class);
+		if (intent.getAction() != null) {
+			mIntentForService.setAction(intent.getAction());
+		} else {
+			mIntentForService.setAction("other");
+		}
+		if (intent.getAction().equals("ui")
+				|| DatabaseBackend.getInstance(context).hasEnabledAccounts()) {
+			context.startService(mIntentForService);
+		}
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
new file mode 100644
index 00000000..8a6d1929
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/MessageArchiveService.java
@@ -0,0 +1,371 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.util.Log;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.generator.AbstractGenerator;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnAdvancedStreamFeaturesLoaded;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class MessageArchiveService implements OnAdvancedStreamFeaturesLoaded {
+
+	private final XmppConnectionService mXmppConnectionService;
+
+	private final HashSet<Query> queries = new HashSet<Query>();
+	private final ArrayList<Query> pendingQueries = new ArrayList<Query>();
+
+	public enum PagingOrder {
+		NORMAL,
+		REVERSE
+	};
+
+	public MessageArchiveService(final XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public void catchup(final Account account) {
+		long startCatchup = getLastMessageTransmitted(account);
+		long endCatchup = account.getXmppConnection().getLastSessionEstablished();
+		if (startCatchup == 0) {
+			return;
+		} else if (endCatchup - startCatchup >= Config.MAM_MAX_CATCHUP) {
+			startCatchup = endCatchup - Config.MAM_MAX_CATCHUP;
+			List<Conversation> conversations = mXmppConnectionService.getConversations();
+			for (Conversation conversation : conversations) {
+				if (conversation.getMode() == Conversation.MODE_SINGLE && conversation.getAccount() == account && startCatchup > conversation.getLastMessageTransmitted()) {
+					this.query(conversation,startCatchup);
+				}
+			}
+		}
+		final Query query = new Query(account, startCatchup, endCatchup);
+		this.queries.add(query);
+		this.execute(query);
+	}
+
+	private long getLastMessageTransmitted(final Account account) {
+		long timestamp = 0;
+		for(final Conversation conversation : mXmppConnectionService.getConversations()) {
+			if (conversation.getAccount() == account) {
+				long tmp = conversation.getLastMessageTransmitted();
+				if (tmp > timestamp) {
+					timestamp = tmp;
+				}
+			}
+		}
+		return timestamp;
+	}
+
+	public Query query(final Conversation conversation) {
+		return query(conversation,conversation.getAccount().getXmppConnection().getLastSessionEstablished());
+	}
+
+	public Query query(final Conversation conversation, long end) {
+		return this.query(conversation,conversation.getLastMessageTransmitted(),end);
+	}
+
+	public Query query(Conversation conversation, long start, long end) {
+		synchronized (this.queries) {
+			if (start > end) {
+				return null;
+			}
+			final Query query = new Query(conversation, start, end,PagingOrder.REVERSE);
+			this.queries.add(query);
+			this.execute(query);
+			return query;
+		}
+	}
+
+	public void executePendingQueries(final Account account) {
+		List<Query> pending = new ArrayList<>();
+		synchronized(this.pendingQueries) {
+			for(Iterator<Query> iterator = this.pendingQueries.iterator(); iterator.hasNext();) {
+				Query query = iterator.next();
+				if (query.getAccount() == account) {
+					pending.add(query);
+					iterator.remove();
+				}
+			}
+		}
+		for(Query query : pending) {
+			this.execute(query);
+		}
+	}
+
+	private void execute(final Query query) {
+		final Account account=  query.getAccount();
+		if (account.getStatus() == Account.State.ONLINE) {
+			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": running mam query " + query.toString());
+			IqPacket packet = this.mXmppConnectionService.getIqGenerator().queryMessageArchiveManagement(query);
+			this.mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE.ERROR) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": error executing mam: " + packet.toString());
+						finalizeQuery(query);
+					}
+				}
+			});
+		} else {
+			synchronized (this.pendingQueries) {
+				this.pendingQueries.add(query);
+			}
+		}
+	}
+
+	private void finalizeQuery(Query query) {
+		synchronized (this.queries) {
+			this.queries.remove(query);
+		}
+		final Conversation conversation = query.getConversation();
+		if (conversation != null) {
+			conversation.sort();
+			if (conversation.setLastMessageTransmitted(query.getEnd())) {
+				this.mXmppConnectionService.databaseBackend.updateConversation(conversation);
+			}
+			conversation.setHasMessagesLeftOnServer(query.getMessageCount() > 0);
+			if (query.hasCallback()) {
+				query.callback();
+			} else {
+				this.mXmppConnectionService.updateConversationUi();
+			}
+		} else {
+			for(Conversation tmp : this.mXmppConnectionService.getConversations()) {
+				if (tmp.getAccount() == query.getAccount()) {
+					tmp.sort();
+					if (tmp.setLastMessageTransmitted(query.getEnd())) {
+						this.mXmppConnectionService.databaseBackend.updateConversation(tmp);
+					}
+				}
+			}
+		}
+	}
+
+	public boolean queryInProgress(Conversation conversation, XmppConnectionService.OnMoreMessagesLoaded callback) {
+		synchronized (this.queries) {
+			for(Query query : queries) {
+				if (query.conversation == conversation) {
+					if (!query.hasCallback() && callback != null) {
+						query.setCallback(callback);
+					}
+					return true;
+				}
+			}
+			return false;
+		}
+	}
+
+	public void processFin(Element fin) {
+		if (fin == null) {
+			return;
+		}
+		Query query = findQuery(fin.getAttribute("queryid"));
+		if (query == null) {
+			return;
+		}
+		boolean complete = fin.getAttributeAsBoolean("complete");
+		Element set = fin.findChild("set","http://jabber.org/protocol/rsm");
+		Element last = set == null ? null : set.findChild("last");
+		Element first = set == null ? null : set.findChild("first");
+		Element relevant = query.getPagingOrder() == PagingOrder.NORMAL ? last : first;
+		boolean abort = (query.getStart() == 0 && query.getTotalCount() >= Config.PAGE_SIZE) || query.getTotalCount() >= Config.MAM_MAX_MESSAGES;
+		if (complete || relevant == null || abort) {
+			this.finalizeQuery(query);
+			Log.d(Config.LOGTAG,query.getAccount().getJid().toBareJid().toString()+": finished mam after "+query.getTotalCount()+" messages");
+		} else {
+			final Query nextQuery;
+			if (query.getPagingOrder() == PagingOrder.NORMAL) {
+				nextQuery = query.next(last == null ? null : last.getContent());
+			} else {
+				nextQuery = query.prev(first == null ? null : first.getContent());
+			}
+			this.execute(nextQuery);
+			this.finalizeQuery(query);
+			synchronized (this.queries) {
+				this.queries.remove(query);
+				this.queries.add(nextQuery);
+			}
+		}
+	}
+
+	public Query findQuery(String id) {
+		if (id == null) {
+			return null;
+		}
+		synchronized (this.queries) {
+			for(Query query : this.queries) {
+				if (query.getQueryId().equals(id)) {
+					return query;
+				}
+			}
+			return null;
+		}
+	}
+
+	@Override
+	public void onAdvancedStreamFeaturesAvailable(Account account) {
+		if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().mam()) {
+			this.catchup(account);
+		}
+	}
+
+	public class Query {
+		private int totalCount = 0;
+		private int messageCount = 0;
+		private long start;
+		private long end;
+		private String queryId;
+		private String reference = null;
+		private Account account;
+		private Conversation conversation;
+		private PagingOrder pagingOrder = PagingOrder.NORMAL;
+		private XmppConnectionService.OnMoreMessagesLoaded callback = null;
+
+
+		public Query(Conversation conversation, long start, long end) {
+			this(conversation.getAccount(), start, end);
+			this.conversation = conversation;
+		}
+
+		public Query(Conversation conversation, long start, long end, PagingOrder order) {
+			this(conversation,start,end);
+			this.pagingOrder = order;
+		}
+
+		public Query(Account account, long start, long end) {
+			this.account = account;
+			this.start = start;
+			this.end = end;
+			this.queryId = new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
+		}
+
+		private Query page(String reference) {
+			Query query = new Query(this.account,this.start,this.end);
+			query.reference = reference;
+			query.conversation = conversation;
+			query.totalCount = totalCount;
+			query.callback = callback;
+			return query;
+		}
+
+		public Query next(String reference) {
+			Query query = page(reference);
+			query.pagingOrder = PagingOrder.NORMAL;
+			return query;
+		}
+
+		public Query prev(String reference) {
+			Query query = page(reference);
+			query.pagingOrder = PagingOrder.REVERSE;
+			return query;
+		}
+
+		public String getReference() {
+			return reference;
+		}
+
+		public PagingOrder getPagingOrder() {
+			return this.pagingOrder;
+		}
+
+		public String getQueryId() {
+			return queryId;
+		}
+
+		public Jid getWith() {
+			return conversation == null ? null : conversation.getJid().toBareJid();
+		}
+
+		public boolean muc() {
+			return conversation != null && conversation.getMode() == Conversation.MODE_MULTI;
+		}
+
+		public long getStart() {
+			return start;
+		}
+
+		public void setCallback(XmppConnectionService.OnMoreMessagesLoaded callback) {
+			this.callback = callback;
+		}
+
+		public void callback() {
+			if (this.callback != null) {
+				this.callback.onMoreMessagesLoaded(messageCount,conversation);
+				if (messageCount == 0) {
+					this.callback.informUser(R.string.no_more_history_on_server);
+				}
+			}
+		}
+
+		public long getEnd() {
+			return end;
+		}
+
+		public Conversation getConversation() {
+			return conversation;
+		}
+
+		public Account getAccount() {
+			return this.account;
+		}
+
+		public void incrementTotalCount() {
+			this.totalCount++;
+		}
+
+		public void incrementMessageCount() {
+			this.messageCount++;
+		}
+
+		public int getTotalCount() {
+			return this.totalCount;
+		}
+
+		public int getMessageCount() {
+			return this.messageCount;
+		}
+
+		@Override
+		public String toString() {
+			StringBuilder builder = new StringBuilder();
+			if (this.muc()) {
+				builder.append("to="+this.getWith().toString());
+			} else {
+				builder.append("with=");
+				if (this.getWith() == null) {
+					builder.append("*");
+				} else {
+					builder.append(getWith().toString());
+				}
+			}
+			builder.append(", start=");
+			builder.append(AbstractGenerator.getTimestamp(this.start));
+			builder.append(", end=");
+			builder.append(AbstractGenerator.getTimestamp(this.end));
+			if (this.reference!=null) {
+				if (this.pagingOrder == PagingOrder.NORMAL) {
+					builder.append(", after=");
+				} else {
+					builder.append(", before=");
+				}
+				builder.append(this.reference);
+			}
+			return builder.toString();
+		}
+
+		public boolean hasCallback() {
+			return this.callback != null;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java b/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
new file mode 100644
index 00000000..50cc793b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
@@ -0,0 +1,557 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.annotation.SuppressLint;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Build;
+import android.os.PowerManager;
+import android.os.SystemClock;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.app.NotificationCompat.BigPictureStyle;
+import android.support.v4.app.NotificationCompat.Builder;
+import android.support.v4.app.TaskStackBuilder;
+import android.text.Html;
+import android.util.DisplayMetrics;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.io.FileNotFoundException;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.ui.ConversationActivity;
+import de.thedevstack.conversationsplus.ui.ManageAccountActivity;
+import de.thedevstack.conversationsplus.ui.TimePreference;
+import de.thedevstack.conversationsplus.utils.GeoHelper;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+
+public class NotificationService {
+
+	private final XmppConnectionService mXmppConnectionService;
+
+	private final LinkedHashMap<String, ArrayList<Message>> notifications = new LinkedHashMap<>();
+
+	public static final int NOTIFICATION_ID = 0x2342;
+	public static final int FOREGROUND_NOTIFICATION_ID = 0x8899;
+	public static final int ERROR_NOTIFICATION_ID = 0x5678;
+
+	private Conversation mOpenConversation;
+	private boolean mIsInForeground;
+	private long mLastNotification;
+
+	public NotificationService(final XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public boolean notify(final Message message) {
+		return (message.getStatus() == Message.STATUS_RECEIVED)
+			&& notificationsEnabled()
+			&& !message.getConversation().isMuted()
+			&& (message.getConversation().getMode() == Conversation.MODE_SINGLE
+					|| conferenceNotificationsEnabled()
+					|| wasHighlightedOrPrivate(message)
+				 );
+	}
+
+	public void notifyPebble(final Message message) {
+		final Intent i = new Intent("com.getpebble.action.SEND_NOTIFICATION");
+
+		final Conversation conversation = message.getConversation();
+		final JSONObject jsonData = new JSONObject(new HashMap<String, String>(2) {{
+			put("title", conversation.getName());
+			put("body", message.getBody());
+		}});
+		final String notificationData = new JSONArray().put(jsonData).toString();
+
+		i.putExtra("messageType", "PEBBLE_ALERT");
+		i.putExtra("sender", "Conversations"); /* XXX: Shouldn't be hardcoded, e.g., AbstractGenerator.APP_NAME); */
+		i.putExtra("notificationData", notificationData);
+
+		mXmppConnectionService.sendBroadcast(i);
+	}
+
+
+	public boolean notificationsEnabled() {
+		return mXmppConnectionService.getPreferences().getBoolean("show_notification", true);
+	}
+
+	public boolean isQuietHours() {
+		if (!mXmppConnectionService.getPreferences().getBoolean("enable_quiet_hours", false)) {
+			return false;
+		}
+		final long startTime = mXmppConnectionService.getPreferences().getLong("quiet_hours_start", TimePreference.DEFAULT_VALUE) % Config.MILLISECONDS_IN_DAY;
+		final long endTime = mXmppConnectionService.getPreferences().getLong("quiet_hours_end", TimePreference.DEFAULT_VALUE) % Config.MILLISECONDS_IN_DAY;
+		final long nowTime = Calendar.getInstance().getTimeInMillis() % Config.MILLISECONDS_IN_DAY;
+
+		if (endTime < startTime) {
+			return nowTime > startTime || nowTime < endTime;
+		} else {
+			return nowTime > startTime && nowTime < endTime;
+		}
+	}
+
+	public boolean conferenceNotificationsEnabled() {
+		return mXmppConnectionService.getPreferences().getBoolean("always_notify_in_conference", false);
+	}
+
+	@SuppressLint("NewApi")
+	@SuppressWarnings("deprecation")
+	private boolean isInteractive() {
+		final PowerManager pm = (PowerManager) mXmppConnectionService
+			.getSystemService(Context.POWER_SERVICE);
+
+		final boolean isScreenOn;
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+			isScreenOn = pm.isScreenOn();
+		} else {
+			isScreenOn = pm.isInteractive();
+		}
+
+		return isScreenOn;
+	}
+
+	public void push(final Message message) {
+		if (!notify(message)) {
+			return;
+		}
+
+		final boolean isScreenOn = isInteractive();
+
+		if (this.mIsInForeground && isScreenOn && this.mOpenConversation == message.getConversation()) {
+			return;
+		}
+
+		synchronized (notifications) {
+			final String conversationUuid = message.getConversationUuid();
+			if (notifications.containsKey(conversationUuid)) {
+				notifications.get(conversationUuid).add(message);
+			} else {
+				final ArrayList<Message> mList = new ArrayList<>();
+				mList.add(message);
+				notifications.put(conversationUuid, mList);
+			}
+			final Account account = message.getConversation().getAccount();
+			final boolean doNotify = (!(this.mIsInForeground && this.mOpenConversation == null) || !isScreenOn)
+				&& !account.inGracePeriod()
+				&& !this.inMiniGracePeriod(account);
+			updateNotification(doNotify);
+			if (doNotify) {
+				notifyPebble(message);
+			}
+		}
+	}
+
+	public void clear() {
+		synchronized (notifications) {
+			notifications.clear();
+			updateNotification(false);
+		}
+	}
+
+	public void clear(final Conversation conversation) {
+		synchronized (notifications) {
+			notifications.remove(conversation.getUuid());
+			updateNotification(false);
+		}
+	}
+
+	private void setNotificationColor(final Builder mBuilder) {
+		mBuilder.setColor(mXmppConnectionService.getResources().getColor(R.color.primary));
+	}
+
+	private void updateNotification(final boolean notify) {
+		final NotificationManager notificationManager = (NotificationManager) mXmppConnectionService
+			.getSystemService(Context.NOTIFICATION_SERVICE);
+		final SharedPreferences preferences = mXmppConnectionService.getPreferences();
+
+		final String ringtone = preferences.getString("notification_ringtone", null);
+		final boolean vibrate = preferences.getBoolean("vibrate_on_notification", true);
+
+		if (notifications.size() == 0) {
+			notificationManager.cancel(NOTIFICATION_ID);
+		} else {
+			if (notify) {
+				this.markLastNotification();
+			}
+			final Builder mBuilder;
+			if (notifications.size() == 1) {
+				mBuilder = buildSingleConversations(notify);
+			} else {
+				mBuilder = buildMultipleConversation();
+			}
+			if (notify && !isQuietHours()) {
+				if (vibrate) {
+					final int dat = 70;
+					final long[] pattern = {0, 3 * dat, dat, dat};
+					mBuilder.setVibrate(pattern);
+				}
+				if (ringtone != null) {
+					mBuilder.setSound(Uri.parse(ringtone));
+				}
+			}
+			if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+				mBuilder.setCategory(Notification.CATEGORY_MESSAGE);
+			}
+			setNotificationColor(mBuilder);
+			mBuilder.setDefaults(0);
+			mBuilder.setSmallIcon(R.drawable.ic_notification);
+			mBuilder.setDeleteIntent(createDeleteIntent());
+			mBuilder.setLights(Settings.LED_COLOR, 2000, 4000);
+			final Notification notification = mBuilder.build();
+			notificationManager.notify(NOTIFICATION_ID, notification);
+		}
+	}
+
+	private Builder buildMultipleConversation() {
+		final Builder mBuilder = new NotificationCompat.Builder(
+				mXmppConnectionService);
+		final NotificationCompat.InboxStyle style = new NotificationCompat.InboxStyle();
+		style.setBigContentTitle(notifications.size()
+				+ " "
+				+ mXmppConnectionService
+				.getString(R.string.unread_conversations));
+		final StringBuilder names = new StringBuilder();
+		Conversation conversation = null;
+		for (final ArrayList<Message> messages : notifications.values()) {
+			if (messages.size() > 0) {
+				conversation = messages.get(0).getConversation();
+				final String name = conversation.getName();
+				style.addLine(Html.fromHtml("<b>" + name + "</b> "
+							+ UIHelper.getMessagePreview(mXmppConnectionService,messages.get(0)).first));
+				names.append(name);
+				names.append(", ");
+			}
+		}
+		if (names.length() >= 2) {
+			names.delete(names.length() - 2, names.length());
+		}
+		mBuilder.setContentTitle(notifications.size()
+				+ " "
+				+ mXmppConnectionService
+				.getString(R.string.unread_conversations));
+		mBuilder.setContentText(names.toString());
+		mBuilder.setStyle(style);
+		if (conversation != null) {
+			mBuilder.setContentIntent(createContentIntent(conversation));
+		}
+		return mBuilder;
+	}
+
+	private Builder buildSingleConversations(final boolean notify) {
+		final Builder mBuilder = new NotificationCompat.Builder(
+				mXmppConnectionService);
+		final ArrayList<Message> messages = notifications.values().iterator().next();
+		if (messages.size() >= 1) {
+			final Conversation conversation = messages.get(0).getConversation();
+			mBuilder.setLargeIcon(mXmppConnectionService.getAvatarService()
+					.get(conversation, getPixel(64)));
+			mBuilder.setContentTitle(conversation.getName());
+			Message message;
+			if ((message = getImage(messages)) != null) {
+				modifyForImage(mBuilder, message, messages, notify);
+			} else {
+				modifyForTextOnly(mBuilder, messages, notify);
+			}
+			if ((message = getFirstDownloadableMessage(messages)) != null) {
+				mBuilder.addAction(
+						Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ?
+								R.drawable.ic_file_download_white_24dp : R.drawable.ic_action_download,
+						mXmppConnectionService.getResources().getString(R.string.download_x_file,
+							UIHelper.getFileDescriptionString(mXmppConnectionService, message)),
+						createDownloadIntent(message)
+						);
+			}
+			if ((message = getFirstLocationMessage(messages)) != null) {
+				mBuilder.addAction(R.drawable.ic_room_white_24dp,
+						mXmppConnectionService.getString(R.string.show_location),
+						createShowLocationIntent(message));
+			}
+			mBuilder.setContentIntent(createContentIntent(conversation));
+		}
+		return mBuilder;
+	}
+
+	private void modifyForImage(final Builder builder, final Message message,
+			final ArrayList<Message> messages, final boolean notify) {
+		try {
+			final Bitmap bitmap = mXmppConnectionService.getFileBackend()
+				.getThumbnail(message, getPixel(288), false);
+			final ArrayList<Message> tmp = new ArrayList<>();
+			for (final Message msg : messages) {
+				if (msg.getType() == Message.TYPE_TEXT
+						&& msg.getDownloadable() == null) {
+					tmp.add(msg);
+						}
+			}
+			final BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
+			bigPictureStyle.bigPicture(bitmap);
+			if (tmp.size() > 0) {
+				bigPictureStyle.setSummaryText(getMergedBodies(tmp));
+				builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService,tmp.get(0)).first);
+			} else {
+				builder.setContentText(mXmppConnectionService.getString(
+						R.string.received_x_file,
+						UIHelper.getFileDescriptionString(mXmppConnectionService,message)));
+			}
+			builder.setStyle(bigPictureStyle);
+		} catch (final FileNotFoundException e) {
+			modifyForTextOnly(builder, messages, notify);
+		}
+	}
+
+	private void modifyForTextOnly(final Builder builder,
+			final ArrayList<Message> messages, final boolean notify) {
+		builder.setStyle(new NotificationCompat.BigTextStyle().bigText(getMergedBodies(messages)));
+		builder.setContentText(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(0)).first);
+		if (notify) {
+			builder.setTicker(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(messages.size() - 1)).first);
+		}
+	}
+
+	private Message getImage(final Iterable<Message> messages) {
+		for (final Message message : messages) {
+			if (message.getType() == Message.TYPE_IMAGE
+					&& message.getDownloadable() == null
+					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
+				return message;
+					}
+		}
+		return null;
+	}
+
+	private Message getFirstDownloadableMessage(final Iterable<Message> messages) {
+		for (final Message message : messages) {
+			if ((message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) &&
+					message.getDownloadable() != null) {
+				return message;
+			}
+		}
+		return null;
+	}
+
+	private Message getFirstLocationMessage(final Iterable<Message> messages) {
+		for(final Message message : messages) {
+			if (GeoHelper.isGeoUri(message.getBody())) {
+				return message;
+			}
+		}
+		return null;
+	}
+
+	private CharSequence getMergedBodies(final ArrayList<Message> messages) {
+		final StringBuilder text = new StringBuilder();
+		for (int i = 0; i < messages.size(); ++i) {
+			text.append(UIHelper.getMessagePreview(mXmppConnectionService,messages.get(i)).first);
+			if (i != messages.size() - 1) {
+				text.append("\n");
+			}
+		}
+		return text.toString();
+	}
+
+	private PendingIntent createShowLocationIntent(final Message message) {
+		Iterable<Intent> intents = GeoHelper.createGeoIntentsFromMessage(message);
+		for(Intent intent : intents) {
+			if (intent.resolveActivity(mXmppConnectionService.getPackageManager()) != null) {
+				return PendingIntent.getActivity(mXmppConnectionService,18,intent,PendingIntent.FLAG_UPDATE_CURRENT);
+			}
+		}
+		return createOpenConversationsIntent();
+	}
+
+	private PendingIntent createContentIntent(final String conversationUuid, final String downloadMessageUuid) {
+		final TaskStackBuilder stackBuilder = TaskStackBuilder
+			.create(mXmppConnectionService);
+		stackBuilder.addParentStack(ConversationActivity.class);
+
+		final Intent viewConversationIntent = new Intent(mXmppConnectionService,
+				ConversationActivity.class);
+		if (downloadMessageUuid != null) {
+			viewConversationIntent.setAction(ConversationActivity.ACTION_DOWNLOAD);
+		} else {
+			viewConversationIntent.setAction(Intent.ACTION_VIEW);
+		}
+		if (conversationUuid != null) {
+			viewConversationIntent.putExtra(ConversationActivity.CONVERSATION, conversationUuid);
+			viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
+		}
+		if (downloadMessageUuid != null) {
+			viewConversationIntent.putExtra(ConversationActivity.MESSAGE, downloadMessageUuid);
+		}
+
+		stackBuilder.addNextIntent(viewConversationIntent);
+
+		return stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
+	}
+
+	private PendingIntent createDownloadIntent(final Message message) {
+		return createContentIntent(message.getConversationUuid(), message.getUuid());
+	}
+
+	private PendingIntent createContentIntent(final Conversation conversation) {
+		return createContentIntent(conversation.getUuid(), null);
+	}
+
+	private PendingIntent createDeleteIntent() {
+		final Intent intent = new Intent(mXmppConnectionService,
+				XmppConnectionService.class);
+		intent.setAction(XmppConnectionService.ACTION_CLEAR_NOTIFICATION);
+		return PendingIntent.getService(mXmppConnectionService, 0, intent, 0);
+	}
+
+	private PendingIntent createDisableForeground() {
+		final Intent intent = new Intent(mXmppConnectionService,
+				XmppConnectionService.class);
+		intent.setAction(XmppConnectionService.ACTION_DISABLE_FOREGROUND);
+		return PendingIntent.getService(mXmppConnectionService, 34, intent, 0);
+	}
+
+	private PendingIntent createTryAgainIntent() {
+		final Intent intent = new Intent(mXmppConnectionService, XmppConnectionService.class);
+		intent.setAction(XmppConnectionService.ACTION_TRY_AGAIN);
+		return PendingIntent.getService(mXmppConnectionService, 45, intent, 0);
+	}
+
+	private PendingIntent createDisableAccountIntent(final Account account) {
+		final Intent intent = new Intent(mXmppConnectionService,XmppConnectionService.class);
+		intent.setAction(XmppConnectionService.ACTION_DISABLE_ACCOUNT);
+		intent.putExtra("account",account.getJid().toBareJid().toString());
+		return PendingIntent.getService(mXmppConnectionService,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
+	}
+
+	private boolean wasHighlightedOrPrivate(final Message message) {
+		final String nick = message.getConversation().getMucOptions().getActualNick();
+		final Pattern highlight = generateNickHighlightPattern(nick);
+		if (message.getBody() == null || nick == null) {
+			return false;
+		}
+		final Matcher m = highlight.matcher(message.getBody());
+		return (m.find() || message.getType() == Message.TYPE_PRIVATE);
+	}
+
+	private static Pattern generateNickHighlightPattern(final String nick) {
+		// We expect a word boundary, i.e. space or start of string, followed by
+		// the
+		// nick (matched in case-insensitive manner), followed by optional
+		// punctuation (for example "bob: i disagree" or "how are you alice?"),
+		// followed by another word boundary.
+		return Pattern.compile("\\b" + nick + "\\p{Punct}?\\b",
+				Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
+	}
+
+	public void setOpenConversation(final Conversation conversation) {
+		this.mOpenConversation = conversation;
+	}
+
+	public void setIsInForeground(final boolean foreground) {
+		this.mIsInForeground = foreground;
+	}
+
+	private int getPixel(final int dp) {
+		final DisplayMetrics metrics = mXmppConnectionService.getResources()
+			.getDisplayMetrics();
+		return ((int) (dp * metrics.density));
+	}
+
+	private void markLastNotification() {
+		this.mLastNotification = SystemClock.elapsedRealtime();
+	}
+
+	private boolean inMiniGracePeriod(final Account account) {
+		final int miniGrace = account.getStatus() == Account.State.ONLINE ? Config.MINI_GRACE_PERIOD
+			: Config.MINI_GRACE_PERIOD * 2;
+		return SystemClock.elapsedRealtime() < (this.mLastNotification + miniGrace);
+	}
+
+	public Notification createForegroundNotification() {
+		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
+
+		mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.conversations_foreground_service));
+		mBuilder.setContentText(mXmppConnectionService.getString(R.string.touch_to_open_conversations));
+		mBuilder.setContentIntent(createOpenConversationsIntent());
+		mBuilder.setWhen(0);
+		mBuilder.setPriority(NotificationCompat.PRIORITY_MIN);
+		final int cancelIcon;
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+			mBuilder.setCategory(Notification.CATEGORY_SERVICE);
+			mBuilder.setSmallIcon(R.drawable.ic_import_export_white_48dp);
+			cancelIcon = R.drawable.ic_cancel_white_24dp;
+		} else {
+			mBuilder.setSmallIcon(R.drawable.ic_stat_communication_import_export);
+			cancelIcon = R.drawable.ic_action_cancel;
+		}
+		mBuilder.addAction(cancelIcon,
+				mXmppConnectionService.getString(R.string.disable_foreground_service),
+				createDisableForeground());
+		setNotificationColor(mBuilder);
+		return mBuilder.build();
+	}
+
+	private PendingIntent createOpenConversationsIntent() {
+		return PendingIntent.getActivity(mXmppConnectionService, 0, new Intent(mXmppConnectionService,ConversationActivity.class),0);
+	}
+
+	public void updateErrorNotification() {
+		final NotificationManager mNotificationManager = (NotificationManager) mXmppConnectionService.getSystemService(Context.NOTIFICATION_SERVICE);
+		final List<Account> errors = new ArrayList<>();
+		for (final Account account : mXmppConnectionService.getAccounts()) {
+			if (account.hasErrorStatus()) {
+				errors.add(account);
+			}
+		}
+		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
+		if (errors.size() == 0) {
+			mNotificationManager.cancel(ERROR_NOTIFICATION_ID);
+			return;
+		} else if (errors.size() == 1) {
+			mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.problem_connecting_to_account));
+			mBuilder.setContentText(errors.get(0).getJid().toBareJid().toString());
+		} else {
+			mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.problem_connecting_to_accounts));
+			mBuilder.setContentText(mXmppConnectionService.getString(R.string.touch_to_fix));
+		}
+		mBuilder.addAction(R.drawable.ic_autorenew_white_24dp,
+				mXmppConnectionService.getString(R.string.try_again),
+				createTryAgainIntent());
+		if (errors.size() == 1) {
+			mBuilder.addAction(R.drawable.ic_block_white_24dp,
+					mXmppConnectionService.getString(R.string.disable_account),
+					createDisableAccountIntent(errors.get(0)));
+		}
+		mBuilder.setOngoing(true);
+		//mBuilder.setLights(0xffffffff, 2000, 4000);
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+			mBuilder.setSmallIcon(R.drawable.ic_warning_white_36dp);
+		} else {
+			mBuilder.setSmallIcon(R.drawable.ic_stat_alert_warning);
+		}
+		final TaskStackBuilder stackBuilder = TaskStackBuilder.create(mXmppConnectionService);
+		stackBuilder.addParentStack(ConversationActivity.class);
+
+		final Intent manageAccountsIntent = new Intent(mXmppConnectionService,ManageAccountActivity.class);
+		stackBuilder.addNextIntent(manageAccountsIntent);
+
+		final PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
+
+		mBuilder.setContentIntent(resultPendingIntent);
+		mNotificationManager.notify(ERROR_NOTIFICATION_ID, mBuilder.build());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java b/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
new file mode 100644
index 00000000..3a78cac6
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
@@ -0,0 +1,2434 @@
+package de.thedevstack.conversationsplus.services;
+
+import android.annotation.SuppressLint;
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.database.ContentObserver;
+import android.graphics.Bitmap;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.net.Uri;
+import android.os.Binder;
+import android.os.Bundle;
+import android.os.FileObserver;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.os.SystemClock;
+import android.preference.PreferenceManager;
+import android.provider.ContactsContract;
+import android.util.Log;
+import android.util.LruCache;
+
+import net.java.otr4j.OtrException;
+import net.java.otr4j.session.Session;
+import net.java.otr4j.session.SessionID;
+import net.java.otr4j.session.SessionStatus;
+
+import org.openintents.openpgp.util.OpenPgpApi;
+import org.openintents.openpgp.util.OpenPgpServiceConnection;
+
+import java.math.BigInteger;
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import de.duenndns.ssl.MemorizingTrustManager;
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Blockable;
+import de.thedevstack.conversationsplus.entities.Bookmark;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.DownloadablePlaceholder;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.entities.MucOptions.OnRenameListener;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.generator.IqGenerator;
+import de.thedevstack.conversationsplus.generator.MessageGenerator;
+import de.thedevstack.conversationsplus.generator.PresenceGenerator;
+import de.thedevstack.conversationsplus.http.HttpConnectionManager;
+import de.thedevstack.conversationsplus.parser.IqParser;
+import de.thedevstack.conversationsplus.parser.MessageParser;
+import de.thedevstack.conversationsplus.parser.PresenceParser;
+import de.thedevstack.conversationsplus.persistance.DatabaseBackend;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.ui.UiCallback;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.ExceptionHelper;
+import de.thedevstack.conversationsplus.utils.OnPhoneContactsLoadedListener;
+import de.thedevstack.conversationsplus.utils.PRNGFixes;
+import de.thedevstack.conversationsplus.utils.PhoneHelper;
+import de.thedevstack.conversationsplus.utils.Xmlns;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnBindListener;
+import de.thedevstack.conversationsplus.xmpp.OnContactStatusChanged;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.OnMessageAcknowledged;
+import de.thedevstack.conversationsplus.xmpp.OnMessagePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.OnPresencePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.OnStatusChanged;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.forms.Data;
+import de.thedevstack.conversationsplus.xmpp.forms.Field;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.jingle.JingleConnectionManager;
+import de.thedevstack.conversationsplus.xmpp.jingle.OnJinglePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+
+public class XmppConnectionService extends Service implements OnPhoneContactsLoadedListener {
+
+	public static final String ACTION_CLEAR_NOTIFICATION = "clear_notification";
+	public static final String ACTION_DISABLE_FOREGROUND = "disable_foreground";
+	private static final String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
+	public static final String ACTION_TRY_AGAIN = "try_again";
+	public static final String ACTION_DISABLE_ACCOUNT = "disable_account";
+	private ContentObserver contactObserver = new ContentObserver(null) {
+		@Override
+		public void onChange(boolean selfChange) {
+			super.onChange(selfChange);
+			Intent intent = new Intent(getApplicationContext(),
+					XmppConnectionService.class);
+			intent.setAction(ACTION_MERGE_PHONE_CONTACTS);
+			startService(intent);
+		}
+	};
+	private final IBinder mBinder = new XmppConnectionBinder();
+	private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
+	private final FileObserver fileObserver = new FileObserver(
+			FileBackend.getConversationsImageDirectory()) {
+
+		@Override
+		public void onEvent(int event, String path) {
+			if (event == FileObserver.DELETE) {
+				markFileDeleted(path.split("\\.")[0]);
+			}
+		}
+	};
+	private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
+
+		@Override
+		public void onJinglePacketReceived(Account account, JinglePacket packet) {
+			mJingleConnectionManager.deliverPacket(account, packet);
+		}
+	};
+	private final OnBindListener mOnBindListener = new OnBindListener() {
+
+		@Override
+		public void onBind(final Account account) {
+			account.getRoster().clearPresences();
+			account.pendingConferenceJoins.clear();
+			account.pendingConferenceLeaves.clear();
+			fetchRosterFromServer(account);
+			fetchBookmarks(account);
+			sendPresence(account);
+			connectMultiModeConversations(account);
+			updateConversationUi();
+		}
+	};
+	private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
+
+		@Override
+		public void onMessageAcknowledged(Account account, String uuid) {
+			for (final Conversation conversation : getConversations()) {
+				if (conversation.getAccount() == account) {
+					Message message = conversation.findUnsentMessageWithUuid(uuid);
+					if (message != null) {
+						markMessage(message, Message.STATUS_SEND);
+						if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
+							databaseBackend.updateConversation(conversation);
+						}
+					}
+				}
+			}
+		}
+	};
+	private final IqGenerator mIqGenerator = new IqGenerator(this);
+	public DatabaseBackend databaseBackend;
+	public OnContactStatusChanged onContactStatusChanged = new OnContactStatusChanged() {
+
+		@Override
+		public void onContactStatusChanged(Contact contact, boolean online) {
+			Conversation conversation = find(getConversations(), contact);
+			if (conversation != null) {
+				if (online && contact.getPresences().size() > 1) {
+					conversation.endOtrIfNeeded();
+				} else {
+					conversation.resetOtrSession();
+				}
+				if (online && (contact.getPresences().size() == 1)) {
+					sendUnsentMessages(conversation);
+				}
+			}
+		}
+	};
+	private FileBackend fileBackend = new FileBackend(this);
+	private MemorizingTrustManager mMemorizingTrustManager;
+	private NotificationService mNotificationService = new NotificationService(
+			this);
+	private OnMessagePacketReceived mMessageParser = new MessageParser(this);
+	private OnPresencePacketReceived mPresenceParser = new PresenceParser(this);
+	private IqParser mIqParser = new IqParser(this);
+	private MessageGenerator mMessageGenerator = new MessageGenerator(this);
+	private PresenceGenerator mPresenceGenerator = new PresenceGenerator(this);
+	private List<Account> accounts;
+	private JingleConnectionManager mJingleConnectionManager = new JingleConnectionManager(
+			this);
+	private HttpConnectionManager mHttpConnectionManager = new HttpConnectionManager(
+			this);
+	private AvatarService mAvatarService = new AvatarService(this);
+	private MessageArchiveService mMessageArchiveService = new MessageArchiveService(this);
+	private OnConversationUpdate mOnConversationUpdate = null;
+	private Integer convChangedListenerCount = 0;
+	private OnAccountUpdate mOnAccountUpdate = null;
+	private OnStatusChanged statusListener = new OnStatusChanged() {
+
+		@Override
+		public void onStatusChanged(Account account) {
+			XmppConnection connection = account.getXmppConnection();
+			if (mOnAccountUpdate != null) {
+				mOnAccountUpdate.onAccountUpdate();
+			}
+			if (account.getStatus() == Account.State.ONLINE) {
+				for (Conversation conversation : account.pendingConferenceLeaves) {
+					leaveMuc(conversation);
+				}
+				for (Conversation conversation : account.pendingConferenceJoins) {
+					joinMuc(conversation);
+				}
+				mMessageArchiveService.executePendingQueries(account);
+				mJingleConnectionManager.cancelInTransmission();
+				List<Conversation> conversations = getConversations();
+				for (Conversation conversation : conversations) {
+					if (conversation.getAccount() == account) {
+						conversation.startOtrIfNeeded();
+						sendUnsentMessages(conversation);
+					}
+				}
+				if (connection != null && connection.getFeatures().csi()) {
+					if (checkListeners()) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid()
+								+ " sending csi//inactive");
+						connection.sendInactive();
+					} else {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid()
+								+ " sending csi//active");
+						connection.sendActive();
+					}
+				}
+				syncDirtyContacts(account);
+				scheduleWakeUpCall(Config.PING_MAX_INTERVAL,account.getUuid().hashCode());
+			} else if (account.getStatus() == Account.State.OFFLINE) {
+				resetSendingToWaiting(account);
+				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+					int timeToReconnect = mRandom.nextInt(50) + 10;
+					scheduleWakeUpCall(timeToReconnect,account.getUuid().hashCode());
+				}
+			} else if (account.getStatus() == Account.State.REGISTRATION_SUCCESSFUL) {
+				databaseBackend.updateAccount(account);
+				reconnectAccount(account, true);
+			} else if ((account.getStatus() != Account.State.CONNECTING)
+					&& (account.getStatus() != Account.State.NO_INTERNET)) {
+				if (connection != null) {
+					int next = connection.getTimeToNextAttempt();
+					Log.d(Config.LOGTAG, account.getJid().toBareJid()
+							+ ": error connecting account. try again in "
+							+ next + "s for the "
+							+ (connection.getAttempt() + 1) + " time");
+					scheduleWakeUpCall(next,account.getUuid().hashCode());
+				}
+					}
+			getNotificationService().updateErrorNotification();
+		}
+	};
+	private int accountChangedListenerCount = 0;
+	private OnRosterUpdate mOnRosterUpdate = null;
+	private OnUpdateBlocklist mOnUpdateBlocklist = null;
+	private int updateBlocklistListenerCount = 0;
+	private int rosterChangedListenerCount = 0;
+	private OnMucRosterUpdate mOnMucRosterUpdate = null;
+	private int mucRosterChangedListenerCount = 0;
+	private SecureRandom mRandom;
+	private OpenPgpServiceConnection pgpServiceConnection;
+	private PgpEngine mPgpEngine = null;
+	private WakeLock wakeLock;
+	private PowerManager pm;
+	private LruCache<String, Bitmap> mBitmapCache;
+	private Thread mPhoneContactMergerThread;
+
+	private boolean mRestoredFromDatabase = false;
+	public boolean areMessagesInitialized() {
+		return this.mRestoredFromDatabase;
+	}
+
+	public PgpEngine getPgpEngine() {
+		if (pgpServiceConnection.isBound()) {
+			if (this.mPgpEngine == null) {
+				this.mPgpEngine = new PgpEngine(new OpenPgpApi(
+							getApplicationContext(),
+							pgpServiceConnection.getService()), this);
+			}
+			return mPgpEngine;
+		} else {
+			return null;
+		}
+
+	}
+
+	public FileBackend getFileBackend() {
+		return this.fileBackend;
+	}
+
+	public AvatarService getAvatarService() {
+		return this.mAvatarService;
+	}
+
+	public void attachLocationToConversation(final Conversation conversation,
+											 final Uri uri,
+											 final UiCallback<Message> callback) {
+		int encryption = conversation.getNextEncryption(forceEncryption());
+		if (encryption == Message.ENCRYPTION_PGP) {
+			encryption = Message.ENCRYPTION_DECRYPTED;
+		}
+		Message message = new Message(conversation,uri.toString(),encryption);
+		if (conversation.getNextCounterpart() != null) {
+			message.setCounterpart(conversation.getNextCounterpart());
+		}
+		if (encryption == Message.ENCRYPTION_DECRYPTED) {
+			getPgpEngine().encrypt(message,callback);
+		} else {
+			callback.success(message);
+		}
+	}
+
+	public void attachFileToConversation(final Conversation conversation,
+			final Uri uri,
+			final UiCallback<Message> callback) {
+		final Message message;
+		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
+			message = new Message(conversation, "",
+					Message.ENCRYPTION_DECRYPTED);
+		} else {
+			message = new Message(conversation, "",
+					conversation.getNextEncryption(forceEncryption()));
+		}
+		message.setCounterpart(conversation.getNextCounterpart());
+		message.setType(Message.TYPE_FILE);
+		message.setStatus(Message.STATUS_OFFERED);
+		String path = getFileBackend().getOriginalPath(uri);
+		if (path!=null) {
+			message.setRelativeFilePath(path);
+			getFileBackend().updateFileParams(message);
+			if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+				getPgpEngine().encrypt(message, callback);
+			} else {
+				callback.success(message);
+			}
+		} else {
+			new Thread(new Runnable() {
+				@Override
+				public void run() {
+					try {
+						getFileBackend().copyFileToPrivateStorage(message, uri);
+						getFileBackend().updateFileParams(message);
+						if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+							getPgpEngine().encrypt(message, callback);
+						} else {
+							callback.success(message);
+						}
+					} catch (FileBackend.FileCopyException e) {
+						callback.error(e.getResId(),message);
+					}
+				}
+			}).start();
+
+		}
+	}
+
+	public void attachImageToConversation(final Conversation conversation,
+			final Uri uri, final UiCallback<Message> callback) {
+		final Message message;
+		if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
+			message = new Message(conversation, "",
+					Message.ENCRYPTION_DECRYPTED);
+		} else {
+			message = new Message(conversation, "",
+					conversation.getNextEncryption(forceEncryption()));
+		}
+		message.setCounterpart(conversation.getNextCounterpart());
+		message.setType(Message.TYPE_IMAGE);
+		message.setStatus(Message.STATUS_OFFERED);
+		new Thread(new Runnable() {
+
+			@Override
+			public void run() {
+				try {
+					getFileBackend().copyImageToPrivateStorage(message, uri);
+					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
+						getPgpEngine().encrypt(message, callback);
+					} else {
+						callback.success(message);
+					}
+				} catch (final FileBackend.FileCopyException e) {
+					callback.error(e.getResId(), message);
+				}
+			}
+		}).start();
+	}
+
+	public Conversation find(Bookmark bookmark) {
+		return find(bookmark.getAccount(), bookmark.getJid());
+	}
+
+	public Conversation find(final Account account, final Jid jid) {
+		return find(getConversations(), account, jid);
+	}
+
+	@Override
+	public int onStartCommand(Intent intent, int flags, int startId) {
+		final String action = intent == null ? null : intent.getAction();
+		if (action != null) {
+			switch (action) {
+				case ACTION_MERGE_PHONE_CONTACTS:
+					if (mRestoredFromDatabase) {
+						PhoneHelper.loadPhoneContacts(getApplicationContext(),
+								new CopyOnWriteArrayList<Bundle>(),
+								this);
+					}
+					return START_STICKY;
+				case Intent.ACTION_SHUTDOWN:
+					logoutAndSave();
+					return START_NOT_STICKY;
+				case ACTION_CLEAR_NOTIFICATION:
+					mNotificationService.clear();
+					break;
+				case ACTION_DISABLE_FOREGROUND:
+					getPreferences().edit().putBoolean("keep_foreground_service",false).commit();
+					toggleForegroundService();
+					break;
+				case ACTION_TRY_AGAIN:
+					for(Account account : accounts) {
+						if (account.hasErrorStatus()) {
+							final XmppConnection connection = account.getXmppConnection();
+							if (connection != null) {
+								connection.resetAttemptCount();
+							}
+						}
+					}
+					break;
+				case ACTION_DISABLE_ACCOUNT:
+					try {
+						String jid = intent.getStringExtra("account");
+						Account account = jid == null ? null : findAccountByJid(Jid.fromString(jid));
+						if (account != null) {
+							account.setOption(Account.OPTION_DISABLED,true);
+							updateAccount(account);
+						}
+					} catch (final InvalidJidException ignored) {
+						break;
+					}
+					break;
+			}
+		}
+		this.wakeLock.acquire();
+
+		for (Account account : accounts) {
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				if (!hasInternetConnection()) {
+					account.setStatus(Account.State.NO_INTERNET);
+					if (statusListener != null) {
+						statusListener.onStatusChanged(account);
+					}
+				} else {
+					if (account.getStatus() == Account.State.NO_INTERNET) {
+						account.setStatus(Account.State.OFFLINE);
+						if (statusListener != null) {
+							statusListener.onStatusChanged(account);
+						}
+					}
+					if (account.getStatus() == Account.State.ONLINE) {
+						long lastReceived = account.getXmppConnection().getLastPacketReceived();
+						long lastSent = account.getXmppConnection().getLastPingSent();
+						long pingInterval = "ui".equals(action) ? Config.PING_MIN_INTERVAL * 1000 : Config.PING_MAX_INTERVAL * 1000;
+						long msToNextPing = (Math.max(lastReceived,lastSent) + pingInterval) - SystemClock.elapsedRealtime();
+						if (lastSent > lastReceived && (lastSent +  Config.PING_TIMEOUT * 1000) < SystemClock.elapsedRealtime()) {
+							Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": ping timeout");
+							this.reconnectAccount(account, true);
+						} else if (msToNextPing <= 0) {
+							account.getXmppConnection().sendPing();
+							Log.d(Config.LOGTAG, account.getJid().toBareJid()+" send ping");
+							this.scheduleWakeUpCall(Config.PING_TIMEOUT,account.getUuid().hashCode());
+						} else {
+							this.scheduleWakeUpCall((int) (msToNextPing / 1000), account.getUuid().hashCode());
+						}
+					} else if (account.getStatus() == Account.State.OFFLINE) {
+						reconnectAccount(account,true);
+					} else if (account.getStatus() == Account.State.CONNECTING) {
+						long timeout = Config.CONNECT_TIMEOUT - ((SystemClock.elapsedRealtime() - account.getXmppConnection().getLastConnect()) / 1000);
+						if (timeout < 0) {
+							Log.d(Config.LOGTAG, account.getJid() + ": time out during connect reconnecting");
+							reconnectAccount(account, true);
+						} else {
+							scheduleWakeUpCall((int) timeout,account.getUuid().hashCode());
+						}
+					} else {
+						if (account.getXmppConnection().getTimeToNextAttempt() <= 0) {
+							reconnectAccount(account, true);
+						}
+					}
+
+				}
+				if (mOnAccountUpdate != null) {
+					mOnAccountUpdate.onAccountUpdate();
+				}
+			}
+		}
+		/*PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
+			if (!pm.isScreenOn()) {
+			removeStaleListeners();
+			}*/
+		if (wakeLock.isHeld()) {
+			try {
+				wakeLock.release();
+			} catch (final RuntimeException ignored) {
+			}
+		}
+		return START_STICKY;
+	}
+
+	public boolean hasInternetConnection() {
+		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
+			.getSystemService(Context.CONNECTIVITY_SERVICE);
+		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
+		return activeNetwork != null && activeNetwork.isConnected();
+	}
+
+    /**
+     * check whether we are allowed to download at the moment
+     */
+    public boolean isDownloadAllowedInConnection() {
+        if (Settings.DOWNLOAD_ONLY_WLAN) {
+            return isWifiConnected();
+        }
+        return true;
+    }
+
+    /**
+     * check whether wifi is connected
+     */
+    public boolean isWifiConnected() {
+        ConnectivityManager cm = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkInfo niWifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
+        return niWifi.isConnected();
+    }
+
+	@SuppressLint("TrulyRandom")
+	@Override
+	public void onCreate() {
+		ExceptionHelper.init(getApplicationContext());
+		PRNGFixes.apply();
+		this.mRandom = new SecureRandom();
+		this.mMemorizingTrustManager = new MemorizingTrustManager(
+				getApplicationContext());
+
+		final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+		final int cacheSize = maxMemory / 8;
+		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
+			@Override
+			protected int sizeOf(final String key, final Bitmap bitmap) {
+				return bitmap.getByteCount() / 1024;
+			}
+		};
+
+		this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
+		this.accounts = databaseBackend.getAccounts();
+
+		for (final Account account : this.accounts) {
+			account.initOtrEngine(this);
+		}
+		restoreFromDatabase();
+
+		getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
+		this.fileObserver.startWatching();
+		this.pgpServiceConnection = new OpenPgpServiceConnection(getApplicationContext(), "org.sufficientlysecure.keychain");
+		this.pgpServiceConnection.bindToService();
+
+		this.pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+		this.wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"XmppConnectionService");
+		toggleForegroundService();
+	}
+
+	public void toggleForegroundService() {
+		if (getPreferences().getBoolean("keep_foreground_service",false)) {
+			startForeground(NotificationService.FOREGROUND_NOTIFICATION_ID, this.mNotificationService.createForegroundNotification());
+		} else {
+			stopForeground(true);
+		}
+	}
+
+	@Override
+	public void onTaskRemoved(final Intent rootIntent) {
+		super.onTaskRemoved(rootIntent);
+		if (!getPreferences().getBoolean("keep_foreground_service",false)) {
+			this.logoutAndSave();
+		}
+	}
+
+	private void logoutAndSave() {
+		for (final Account account : accounts) {
+			databaseBackend.writeRoster(account.getRoster());
+			if (account.getXmppConnection() != null) {
+				disconnect(account, false);
+			}
+		}
+		Context context = getApplicationContext();
+		AlarmManager alarmManager = (AlarmManager) context
+			.getSystemService(Context.ALARM_SERVICE);
+		Intent intent = new Intent(context, EventReceiver.class);
+		alarmManager.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
+		Log.d(Config.LOGTAG, "good bye");
+		stopSelf();
+	}
+
+	protected void scheduleWakeUpCall(int seconds, int requestCode) {
+		final long timeToWake = SystemClock.elapsedRealtime() + (seconds + 1) * 1000;
+
+		Context context = getApplicationContext();
+		AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+
+		Intent intent = new Intent(context, EventReceiver.class);
+		intent.setAction("ping");
+		PendingIntent alarmIntent = PendingIntent.getBroadcast(context, requestCode, intent, 0);
+		alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, timeToWake, alarmIntent);
+	}
+
+	public XmppConnection createConnection(final Account account) {
+		final SharedPreferences sharedPref = getPreferences();
+		account.setResource(sharedPref.getString("resource", "mobile")
+				.toLowerCase(Locale.getDefault()));
+		final XmppConnection connection = new XmppConnection(account, this);
+		connection.setOnMessagePacketReceivedListener(this.mMessageParser);
+		connection.setOnStatusChangedListener(this.statusListener);
+		connection.setOnPresencePacketReceivedListener(this.mPresenceParser);
+		connection.setOnUnregisteredIqPacketReceivedListener(this.mIqParser);
+		connection.setOnJinglePacketReceivedListener(this.jingleListener);
+		connection.setOnBindListener(this.mOnBindListener);
+		connection.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
+		connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
+		return connection;
+	}
+
+	public void sendChatState(Conversation conversation) {
+		if (sendChatStates()) {
+			MessagePacket packet = mMessageGenerator.generateChatState(conversation);
+			sendMessagePacket(conversation.getAccount(), packet);
+		}
+	}
+
+	public void sendMessage(final Message message) {
+		final Account account = message.getConversation().getAccount();
+		account.deactivateGracePeriod();
+		final Conversation conv = message.getConversation();
+		MessagePacket packet = null;
+		boolean saveInDb = true;
+		boolean send = false;
+		if (account.getStatus() == Account.State.ONLINE
+				&& account.getXmppConnection() != null) {
+			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+				if (message.getCounterpart() != null) {
+					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+						if (!conv.hasValidOtrSession()) {
+							conv.startOtrSession(message.getCounterpart().getResourcepart(),true);
+							message.setStatus(Message.STATUS_WAITING);
+						} else if (conv.hasValidOtrSession()
+								&& conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
+							mJingleConnectionManager
+								.createNewConnection(message);
+								}
+					} else {
+						mJingleConnectionManager.createNewConnection(message);
+					}
+				} else {
+					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+						conv.startOtrIfNeeded();
+					}
+					message.setStatus(Message.STATUS_WAITING);
+				}
+			} else {
+				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+					if (!conv.hasValidOtrSession() && (message.getCounterpart() != null)) {
+						conv.startOtrSession(message.getCounterpart().getResourcepart(), true);
+						message.setStatus(Message.STATUS_WAITING);
+					} else if (conv.hasValidOtrSession()) {
+						if (conv.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED) {
+							packet = mMessageGenerator.generateOtrChat(message);
+							send = true;
+						} else {
+							message.setStatus(Message.STATUS_WAITING);
+							conv.startOtrIfNeeded();
+						}
+					} else {
+						message.setStatus(Message.STATUS_WAITING);
+					}
+				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+					message.getConversation().endOtrIfNeeded();
+					message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+						@Override
+						public void onMessageFound(Message message) {
+							markMessage(message,Message.STATUS_SEND_FAILED);
+						}
+					});
+					packet = mMessageGenerator.generatePgpChat(message);
+					send = true;
+				} else {
+					message.getConversation().endOtrIfNeeded();
+					message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+						@Override
+						public void onMessageFound(Message message) {
+							markMessage(message,Message.STATUS_SEND_FAILED);
+						}
+					});
+					packet = mMessageGenerator.generateChat(message);
+					send = true;
+				}
+			}
+			if (!account.getXmppConnection().getFeatures().sm()
+					&& conv.getMode() != Conversation.MODE_MULTI) {
+				message.setStatus(Message.STATUS_SEND);
+					}
+		} else {
+			message.setStatus(Message.STATUS_WAITING);
+			if (message.getType() == Message.TYPE_TEXT) {
+				if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+					String pgpBody = message.getEncryptedBody();
+					String decryptedBody = message.getBody();
+					message.setBody(pgpBody);
+					message.setEncryption(Message.ENCRYPTION_PGP);
+					databaseBackend.createMessage(message);
+					saveInDb = false;
+					message.setBody(decryptedBody);
+					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+				} else if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+					if (!conv.hasValidOtrSession()
+							&& message.getCounterpart() != null) {
+						conv.startOtrSession(message.getCounterpart().getResourcepart(), false);
+							}
+				}
+			}
+
+		}
+		conv.add(message);
+		if (saveInDb) {
+			if (message.getEncryption() == Message.ENCRYPTION_NONE
+					|| saveEncryptedMessages()) {
+				databaseBackend.createMessage(message);
+					}
+		}
+		if ((send) && (packet != null)) {
+			if (conv.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
+				if (this.sendChatStates()) {
+					packet.addChild(ChatState.toElement(conv.getOutgoingChatState()));
+				}
+			}
+			sendMessagePacket(account, packet);
+		}
+		updateConversationUi();
+	}
+
+	private void sendUnsentMessages(final Conversation conversation) {
+		conversation.findWaitingMessages(new Conversation.OnMessageFound() {
+
+			@Override
+			public void onMessageFound(Message message) {
+				resendMessage(message);
+			}
+		});
+	}
+
+	private void resendMessage(final Message message) {
+		Account account = message.getConversation().getAccount();
+		MessagePacket packet = null;
+		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+			Presences presences = message.getConversation().getContact()
+				.getPresences();
+			if (!message.getConversation().hasValidOtrSession()) {
+				if ((message.getCounterpart() != null)
+						&& (presences.has(message.getCounterpart().getResourcepart()))) {
+					message.getConversation().startOtrSession(message.getCounterpart().getResourcepart(), true);
+				} else {
+					if (presences.size() == 1) {
+						String presence = presences.asStringArray()[0];
+						message.getConversation().startOtrSession(presence, true);
+					}
+				}
+			} else {
+				if (message.getConversation().getOtrSession()
+						.getSessionStatus() == SessionStatus.ENCRYPTED) {
+					try {
+						message.setCounterpart(Jid.fromSessionID(message.getConversation().getOtrSession().getSessionID()));
+						if (message.getType() == Message.TYPE_TEXT) {
+							packet = mMessageGenerator.generateOtrChat(message,
+									true);
+						} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+							mJingleConnectionManager.createNewConnection(message);
+						}
+					} catch (final InvalidJidException ignored) {
+
+					}
+						}
+			}
+		} else if (message.getType() == Message.TYPE_TEXT) {
+			if (message.getEncryption() == Message.ENCRYPTION_NONE) {
+				packet = mMessageGenerator.generateChat(message, true);
+			} else if ((message.getEncryption() == Message.ENCRYPTION_DECRYPTED)
+					|| (message.getEncryption() == Message.ENCRYPTION_PGP)) {
+				packet = mMessageGenerator.generatePgpChat(message, true);
+					}
+		} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+			Contact contact = message.getConversation().getContact();
+			Presences presences = contact.getPresences();
+			if ((message.getCounterpart() != null)
+					&& (presences.has(message.getCounterpart().getResourcepart()))) {
+				markMessage(message, Message.STATUS_OFFERED);
+				mJingleConnectionManager.createNewConnection(message);
+			} else {
+				if (presences.size() == 1) {
+					String presence = presences.asStringArray()[0];
+					try {
+						message.setCounterpart(Jid.fromParts(contact.getJid().getLocalpart(), contact.getJid().getDomainpart(), presence));
+					} catch (InvalidJidException e) {
+						return;
+					}
+					markMessage(message, Message.STATUS_OFFERED);
+					mJingleConnectionManager.createNewConnection(message);
+				}
+			}
+		}
+		if (packet != null) {
+			if (!account.getXmppConnection().getFeatures().sm()
+					&& message.getConversation().getMode() != Conversation.MODE_MULTI) {
+				markMessage(message, Message.STATUS_SEND);
+			} else {
+				markMessage(message, Message.STATUS_UNSEND);
+			}
+			if (message.getConversation().setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
+				if (this.sendChatStates()) {
+					packet.addChild(ChatState.toElement(message.getConversation().getOutgoingChatState()));
+				}
+			}
+			sendMessagePacket(account, packet);
+		}
+	}
+
+	public void fetchRosterFromServer(final Account account) {
+		final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
+		if (!"".equals(account.getRosterVersion())) {
+			Log.d(Config.LOGTAG, account.getJid().toBareJid()
+					+ ": fetching roster version " + account.getRosterVersion());
+		} else {
+			Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": fetching roster");
+		}
+		iqPacket.query(Xmlns.ROSTER).setAttribute("ver",
+				account.getRosterVersion());
+		account.getXmppConnection().sendIqPacket(iqPacket, mIqParser);
+	}
+
+	public void fetchBookmarks(final Account account) {
+		final IqPacket iqPacket = new IqPacket(IqPacket.TYPE.GET);
+		final Element query = iqPacket.query("jabber:iq:private");
+		query.addChild("storage", "storage:bookmarks");
+		final OnIqPacketReceived callback = new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				final Element query = packet.query();
+				final List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
+				final Element storage = query.findChild("storage",
+						"storage:bookmarks");
+				if (storage != null) {
+					for (final Element item : storage.getChildren()) {
+						if (item.getName().equals("conference")) {
+							final Bookmark bookmark = Bookmark.parse(item, account);
+							bookmarks.add(bookmark);
+							Conversation conversation = find(bookmark);
+							if (conversation != null) {
+								conversation.setBookmark(bookmark);
+							} else if (bookmark.autojoin() && bookmark.getJid() != null) {
+								conversation = findOrCreateConversation(
+										account, bookmark.getJid(), true);
+								conversation.setBookmark(bookmark);
+								joinMuc(conversation);
+							}
+						}
+					}
+				}
+				account.setBookmarks(bookmarks);
+			}
+		};
+		sendIqPacket(account, iqPacket, callback);
+	}
+
+	public void pushBookmarks(Account account) {
+		IqPacket iqPacket = new IqPacket(IqPacket.TYPE.SET);
+		Element query = iqPacket.query("jabber:iq:private");
+		Element storage = query.addChild("storage", "storage:bookmarks");
+		for (Bookmark bookmark : account.getBookmarks()) {
+			storage.addChild(bookmark);
+		}
+		sendIqPacket(account, iqPacket, null);
+	}
+
+	public void onPhoneContactsLoaded(final List<Bundle> phoneContacts) {
+		if (mPhoneContactMergerThread != null) {
+			mPhoneContactMergerThread.interrupt();
+		}
+		mPhoneContactMergerThread = new Thread(new Runnable() {
+			@Override
+			public void run() {
+				Log.d(Config.LOGTAG,"start merging phone contacts with roster");
+				for (Account account : accounts) {
+					account.getRoster().clearSystemAccounts();
+					for (Bundle phoneContact : phoneContacts) {
+						if (Thread.interrupted()) {
+							Log.d(Config.LOGTAG,"interrupted merging phone contacts");
+							return;
+						}
+						Jid jid;
+						try {
+							jid = Jid.fromString(phoneContact.getString("jid"));
+						} catch (final InvalidJidException e) {
+							continue;
+						}
+						final Contact contact = account.getRoster().getContact(jid);
+						String systemAccount = phoneContact.getInt("phoneid")
+							+ "#"
+							+ phoneContact.getString("lookup");
+						contact.setSystemAccount(systemAccount);
+						contact.setPhotoUri(phoneContact.getString("photouri"));
+						getAvatarService().clear(contact);
+						contact.setSystemName(phoneContact.getString("displayname"));
+					}
+				}
+				Log.d(Config.LOGTAG,"finished merging phone contacts");
+				updateAccountUi();
+			}
+		});
+		mPhoneContactMergerThread.start();
+	}
+
+	private void restoreFromDatabase() {
+		synchronized (this.conversations) {
+			final Map<String, Account> accountLookupTable = new Hashtable<>();
+			for (Account account : this.accounts) {
+				accountLookupTable.put(account.getUuid(), account);
+			}
+			this.conversations.addAll(databaseBackend.getConversations(Conversation.STATUS_AVAILABLE));
+			for (Conversation conversation : this.conversations) {
+				Account account = accountLookupTable.get(conversation.getAccountUuid());
+				conversation.setAccount(account);
+			}
+			new Thread(new Runnable() {
+				@Override
+				public void run() {
+					Log.d(Config.LOGTAG,"restoring roster");
+					for(Account account : accounts) {
+						databaseBackend.readRoster(account.getRoster());
+					}
+					getBitmapCache().evictAll();
+					Looper.prepare();
+					PhoneHelper.loadPhoneContacts(getApplicationContext(),
+							new CopyOnWriteArrayList<Bundle>(),
+							XmppConnectionService.this);
+					Log.d(Config.LOGTAG,"restoring messages");
+					for (Conversation conversation : conversations) {
+						conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
+						checkDeletedFiles(conversation);
+					}
+					mRestoredFromDatabase = true;
+					Log.d(Config.LOGTAG,"restored all messages");
+					updateConversationUi();
+				}
+			}).start();
+		}
+	}
+
+	public List<Conversation> getConversations() {
+		return this.conversations;
+	}
+
+	private void checkDeletedFiles(Conversation conversation) {
+		conversation.findMessagesWithFiles(new Conversation.OnMessageFound() {
+
+			@Override
+			public void onMessageFound(Message message) {
+				if (!getFileBackend().isFileAvailable(message)) {
+					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+				}
+			}
+		});
+	}
+
+	private void markFileDeleted(String uuid) {
+		for (Conversation conversation : getConversations()) {
+			Message message = conversation.findMessageWithFileAndUuid(uuid);
+			if (message != null) {
+				if (!getFileBackend().isFileAvailable(message)) {
+					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+					updateConversationUi();
+				}
+				return;
+			}
+		}
+	}
+
+	public void populateWithOrderedConversations(final List<Conversation> list) {
+		populateWithOrderedConversations(list, true);
+	}
+
+	public void populateWithOrderedConversations(final List<Conversation> list, boolean includeConferences) {
+		list.clear();
+		if (includeConferences) {
+			list.addAll(getConversations());
+		} else {
+			for (Conversation conversation : getConversations()) {
+				if (conversation.getMode() == Conversation.MODE_SINGLE) {
+					list.add(conversation);
+				}
+			}
+		}
+		Collections.sort(list, new Comparator<Conversation>() {
+			@Override
+			public int compare(Conversation lhs, Conversation rhs) {
+				Message left = lhs.getLatestMessage();
+				Message right = rhs.getLatestMessage();
+				if (left.getTimeSent() > right.getTimeSent()) {
+					return -1;
+				} else if (left.getTimeSent() < right.getTimeSent()) {
+					return 1;
+				} else {
+					return 0;
+				}
+			}
+		});
+	}
+
+	public void loadMoreMessages(final Conversation conversation, final long timestamp, final OnMoreMessagesLoaded callback) {
+		Log.d(Config.LOGTAG,"load more messages for "+conversation.getName() + " prior to "+MessageGenerator.getTimestamp(timestamp));
+		if (XmppConnectionService.this.getMessageArchiveService().queryInProgress(conversation,callback)) {
+			return;
+		}
+		new Thread(new Runnable() {
+			@Override
+			public void run() {
+				final Account account = conversation.getAccount();
+				List<Message> messages = databaseBackend.getMessages(conversation, 50,timestamp);
+				if (messages.size() > 0) {
+					conversation.addAll(0, messages);
+					checkDeletedFiles(conversation);
+					callback.onMoreMessagesLoaded(messages.size(), conversation);
+				} else if (conversation.hasMessagesLeftOnServer()
+						&& account.isOnlineAndConnected()
+						&& account.getXmppConnection().getFeatures().mam()) {
+					MessageArchiveService.Query query = getMessageArchiveService().query(conversation,0,timestamp - 1);
+					if (query != null) {
+						query.setCallback(callback);
+					}
+					callback.informUser(R.string.fetching_history_from_server);
+				}
+			}
+		}).start();
+	}
+
+	public List<Account> getAccounts() {
+		return this.accounts;
+	}
+
+	public Conversation find(final Iterable<Conversation> haystack, final Contact contact) {
+		for (final Conversation conversation : haystack) {
+			if (conversation.getContact() == contact) {
+				return conversation;
+			}
+		}
+		return null;
+	}
+
+	public Conversation find(final Iterable<Conversation> haystack, final Account account, final Jid jid) {
+		if (jid == null) {
+			return null;
+		}
+		for (final Conversation conversation : haystack) {
+			if ((account == null || conversation.getAccount() == account)
+					&& (conversation.getJid().toBareJid().equals(jid.toBareJid()))) {
+				return conversation;
+			}
+		}
+		return null;
+	}
+
+	public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc) {
+		return this.findOrCreateConversation(account, jid, muc, null);
+	}
+
+	public Conversation findOrCreateConversation(final Account account, final Jid jid, final boolean muc, final MessageArchiveService.Query query) {
+		synchronized (this.conversations) {
+			Conversation conversation = find(account, jid);
+			if (conversation != null) {
+				return conversation;
+			}
+			conversation = databaseBackend.findConversation(account, jid);
+			if (conversation != null) {
+				conversation.setStatus(Conversation.STATUS_AVAILABLE);
+				conversation.setAccount(account);
+				if (muc) {
+					conversation.setMode(Conversation.MODE_MULTI);
+					conversation.setContactJid(jid);
+				} else {
+					conversation.setMode(Conversation.MODE_SINGLE);
+					conversation.setContactJid(jid.toBareJid());
+				}
+				conversation.setNextEncryption(-1);
+				conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
+				this.databaseBackend.updateConversation(conversation);
+			} else {
+				String conversationName;
+				Contact contact = account.getRoster().getContact(jid);
+				if (contact != null) {
+					conversationName = contact.getDisplayName();
+				} else {
+					conversationName = jid.getLocalpart();
+				}
+				if (muc) {
+					conversation = new Conversation(conversationName, account, jid,
+							Conversation.MODE_MULTI);
+				} else {
+					conversation = new Conversation(conversationName, account, jid.toBareJid(),
+							Conversation.MODE_SINGLE);
+				}
+				this.databaseBackend.createConversation(conversation);
+			}
+			if (account.getXmppConnection() != null
+					&& account.getXmppConnection().getFeatures().mam()
+					&& !muc) {
+				if (query == null) {
+					this.mMessageArchiveService.query(conversation);
+				} else {
+					if (query.getConversation() == null) {
+						this.mMessageArchiveService.query(conversation, query.getStart());
+					}
+				}
+			}
+			checkDeletedFiles(conversation);
+			this.conversations.add(conversation);
+			updateConversationUi();
+			return conversation;
+		}
+	}
+
+	public void archiveConversation(Conversation conversation) {
+		conversation.setStatus(Conversation.STATUS_ARCHIVED);
+		conversation.setNextEncryption(-1);
+		synchronized (this.conversations) {
+			if (conversation.getMode() == Conversation.MODE_MULTI) {
+				if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
+					Bookmark bookmark = conversation.getBookmark();
+					if (bookmark != null && bookmark.autojoin()) {
+						bookmark.setAutojoin(false);
+						pushBookmarks(bookmark.getAccount());
+					}
+				}
+				leaveMuc(conversation);
+			} else {
+				conversation.endOtrIfNeeded();
+			}
+			this.databaseBackend.updateConversation(conversation);
+			this.conversations.remove(conversation);
+			updateConversationUi();
+		}
+	}
+
+	public void createAccount(final Account account) {
+		account.initOtrEngine(this);
+		databaseBackend.createAccount(account);
+		this.accounts.add(account);
+		this.reconnectAccountInBackground(account);
+		updateAccountUi();
+	}
+
+	public void updateAccount(final Account account) {
+		this.statusListener.onStatusChanged(account);
+		databaseBackend.updateAccount(account);
+		reconnectAccount(account, false);
+		updateAccountUi();
+		getNotificationService().updateErrorNotification();
+	}
+
+	public void updateAccountPasswordOnServer(final Account account, final String newPassword, final OnAccountPasswordChanged callback) {
+		final IqPacket iq = getIqGenerator().generateSetPassword(account, newPassword);
+		sendIqPacket(account, iq, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					account.setPassword(newPassword);
+					databaseBackend.updateAccount(account);
+					callback.onPasswordChangeSucceeded();
+				} else {
+					callback.onPasswordChangeFailed();
+				}
+			}
+		});
+	}
+
+	public void deleteAccount(final Account account) {
+		synchronized (this.conversations) {
+			for (final Conversation conversation : conversations) {
+				if (conversation.getAccount() == account) {
+					if (conversation.getMode() == Conversation.MODE_MULTI) {
+						leaveMuc(conversation);
+					} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
+						conversation.endOtrIfNeeded();
+					}
+					conversations.remove(conversation);
+				}
+			}
+			if (account.getXmppConnection() != null) {
+				this.disconnect(account, true);
+			}
+			databaseBackend.deleteAccount(account);
+			this.accounts.remove(account);
+			updateAccountUi();
+			getNotificationService().updateErrorNotification();
+		}
+	}
+
+	public void setOnConversationListChangedListener(OnConversationUpdate listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnConversationUpdate = listener;
+			this.mNotificationService.setIsInForeground(true);
+			if (this.convChangedListenerCount < 2) {
+				this.convChangedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnConversationListChangedListener() {
+		synchronized (this) {
+			this.convChangedListenerCount--;
+			if (this.convChangedListenerCount <= 0) {
+				this.convChangedListenerCount = 0;
+				this.mOnConversationUpdate = null;
+				this.mNotificationService.setIsInForeground(false);
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
+	public void setOnAccountListChangedListener(OnAccountUpdate listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnAccountUpdate = listener;
+			if (this.accountChangedListenerCount < 2) {
+				this.accountChangedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnAccountListChangedListener() {
+		synchronized (this) {
+			this.accountChangedListenerCount--;
+			if (this.accountChangedListenerCount <= 0) {
+				this.mOnAccountUpdate = null;
+				this.accountChangedListenerCount = 0;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
+	public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnRosterUpdate = listener;
+			if (this.rosterChangedListenerCount < 2) {
+				this.rosterChangedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnRosterUpdateListener() {
+		synchronized (this) {
+			this.rosterChangedListenerCount--;
+			if (this.rosterChangedListenerCount <= 0) {
+				this.rosterChangedListenerCount = 0;
+				this.mOnRosterUpdate = null;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
+	public void setOnUpdateBlocklistListener(final OnUpdateBlocklist listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnUpdateBlocklist = listener;
+			if (this.updateBlocklistListenerCount < 2) {
+				this.updateBlocklistListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnUpdateBlocklistListener() {
+		synchronized (this) {
+			this.updateBlocklistListenerCount--;
+			if (this.updateBlocklistListenerCount <= 0) {
+				this.updateBlocklistListenerCount = 0;
+				this.mOnUpdateBlocklist = null;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
+	public void setOnMucRosterUpdateListener(OnMucRosterUpdate listener) {
+		synchronized (this) {
+			if (checkListeners()) {
+				switchToForeground();
+			}
+			this.mOnMucRosterUpdate = listener;
+			if (this.mucRosterChangedListenerCount < 2) {
+				this.mucRosterChangedListenerCount++;
+			}
+		}
+	}
+
+	public void removeOnMucRosterUpdateListener() {
+		synchronized (this) {
+			this.mucRosterChangedListenerCount--;
+			if (this.mucRosterChangedListenerCount <= 0) {
+				this.mucRosterChangedListenerCount = 0;
+				this.mOnMucRosterUpdate = null;
+				if (checkListeners()) {
+					switchToBackground();
+				}
+			}
+		}
+	}
+
+	private boolean checkListeners() {
+		return (this.mOnAccountUpdate == null
+				&& this.mOnConversationUpdate == null
+				&& this.mOnRosterUpdate == null
+				&& this.mOnUpdateBlocklist == null);
+	}
+
+	private void switchToForeground() {
+		for (Account account : getAccounts()) {
+			if (account.getStatus() == Account.State.ONLINE) {
+				XmppConnection connection = account.getXmppConnection();
+				if (connection != null && connection.getFeatures().csi()) {
+					connection.sendActive();
+				}
+			}
+		}
+		Log.d(Config.LOGTAG, "app switched into foreground");
+	}
+
+	private void switchToBackground() {
+		for (Account account : getAccounts()) {
+			if (account.getStatus() == Account.State.ONLINE) {
+				XmppConnection connection = account.getXmppConnection();
+				if (connection != null && connection.getFeatures().csi()) {
+					connection.sendInactive();
+				}
+			}
+		}
+		for(Conversation conversation : getConversations()) {
+			conversation.setIncomingChatState(ChatState.ACTIVE);
+		}
+		this.mNotificationService.setIsInForeground(false);
+		Log.d(Config.LOGTAG, "app switched into background");
+	}
+
+	private void connectMultiModeConversations(Account account) {
+		List<Conversation> conversations = getConversations();
+		for (Conversation conversation : conversations) {
+			if ((conversation.getMode() == Conversation.MODE_MULTI)
+					&& (conversation.getAccount() == account)) {
+				conversation.resetMucOptions();
+				joinMuc(conversation);
+			}
+		}
+	}
+
+	public void joinMuc(Conversation conversation) {
+		Account account = conversation.getAccount();
+		account.pendingConferenceJoins.remove(conversation);
+		account.pendingConferenceLeaves.remove(conversation);
+		if (account.getStatus() == Account.State.ONLINE) {
+			final String nick = conversation.getMucOptions().getProposedNick();
+			final Jid joinJid = conversation.getMucOptions().createJoinJid(nick);
+			if (joinJid == null) {
+				return; //safety net
+			}
+			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": joining conversation " + joinJid.toString());
+			PresencePacket packet = new PresencePacket();
+			packet.setFrom(conversation.getAccount().getJid());
+			packet.setTo(joinJid);
+			Element x = packet.addChild("x", "http://jabber.org/protocol/muc");
+			if (conversation.getMucOptions().getPassword() != null) {
+				x.addChild("password").setContent(conversation.getMucOptions().getPassword());
+			}
+			x.addChild("history").setAttribute("since", PresenceGenerator.getTimestamp(conversation.getLastMessageTransmitted()));
+			String sig = account.getPgpSignature();
+			if (sig != null) {
+				packet.addChild("status").setContent("online");
+				packet.addChild("x", "jabber:x:signed").setContent(sig);
+			}
+			sendPresencePacket(account, packet);
+			fetchConferenceConfiguration(conversation);
+			if (!joinJid.equals(conversation.getJid())) {
+				conversation.setContactJid(joinJid);
+				databaseBackend.updateConversation(conversation);
+			}
+			conversation.setHasMessagesLeftOnServer(false);
+		} else {
+			account.pendingConferenceJoins.add(conversation);
+		}
+	}
+
+	public void providePasswordForMuc(Conversation conversation, String password) {
+		if (conversation.getMode() == Conversation.MODE_MULTI) {
+			conversation.getMucOptions().setPassword(password);
+			if (conversation.getBookmark() != null) {
+				conversation.getBookmark().setAutojoin(true);
+				pushBookmarks(conversation.getAccount());
+			}
+			databaseBackend.updateConversation(conversation);
+			joinMuc(conversation);
+		}
+	}
+
+	public void renameInMuc(final Conversation conversation, final String nick, final UiCallback<Conversation> callback) {
+		final MucOptions options = conversation.getMucOptions();
+		final Jid joinJid = options.createJoinJid(nick);
+		if (options.online()) {
+			Account account = conversation.getAccount();
+			options.setOnRenameListener(new OnRenameListener() {
+
+				@Override
+				public void onSuccess() {
+					conversation.setContactJid(joinJid);
+					databaseBackend.updateConversation(conversation);
+					Bookmark bookmark = conversation.getBookmark();
+					if (bookmark != null) {
+						bookmark.setNick(nick);
+						pushBookmarks(bookmark.getAccount());
+					}
+					callback.success(conversation);
+				}
+
+				@Override
+				public void onFailure() {
+					callback.error(R.string.nick_in_use, conversation);
+				}
+			});
+
+			PresencePacket packet = new PresencePacket();
+			packet.setTo(joinJid);
+			packet.setFrom(conversation.getAccount().getJid());
+
+			String sig = account.getPgpSignature();
+			if (sig != null) {
+				packet.addChild("status").setContent("online");
+				packet.addChild("x", "jabber:x:signed").setContent(sig);
+			}
+			sendPresencePacket(account, packet);
+		} else {
+			conversation.setContactJid(joinJid);
+			databaseBackend.updateConversation(conversation);
+			if (conversation.getAccount().getStatus() == Account.State.ONLINE) {
+				Bookmark bookmark = conversation.getBookmark();
+				if (bookmark != null) {
+					bookmark.setNick(nick);
+					pushBookmarks(bookmark.getAccount());
+				}
+				joinMuc(conversation);
+			}
+		}
+	}
+
+	public void leaveMuc(Conversation conversation) {
+		Account account = conversation.getAccount();
+		account.pendingConferenceJoins.remove(conversation);
+		account.pendingConferenceLeaves.remove(conversation);
+		if (account.getStatus() == Account.State.ONLINE) {
+			PresencePacket packet = new PresencePacket();
+			packet.setTo(conversation.getJid());
+			packet.setFrom(conversation.getAccount().getJid());
+			packet.setAttribute("type", "unavailable");
+			sendPresencePacket(conversation.getAccount(), packet);
+			conversation.getMucOptions().setOffline();
+			conversation.deregisterWithBookmark();
+			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid()
+					+ ": leaving muc " + conversation.getJid());
+		} else {
+			account.pendingConferenceLeaves.add(conversation);
+		}
+	}
+
+	private String findConferenceServer(final Account account) {
+		String server;
+		if (account.getXmppConnection() != null) {
+			server = account.getXmppConnection().getMucServer();
+			if (server != null) {
+				return server;
+			}
+		}
+		for (Account other : getAccounts()) {
+			if (other != account && other.getXmppConnection() != null) {
+				server = other.getXmppConnection().getMucServer();
+				if (server != null) {
+					return server;
+				}
+			}
+		}
+		return null;
+	}
+
+	public void createAdhocConference(final Account account, final Iterable<Jid> jids, final UiCallback<Conversation> callback) {
+		Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": creating adhoc conference with " + jids.toString());
+		if (account.getStatus() == Account.State.ONLINE) {
+			try {
+				String server = findConferenceServer(account);
+				if (server == null) {
+					if (callback != null) {
+						callback.error(R.string.no_conference_server_found, null);
+					}
+					return;
+				}
+				String name = new BigInteger(75, getRNG()).toString(32);
+				Jid jid = Jid.fromParts(name, server, null);
+				final Conversation conversation = findOrCreateConversation(account, jid, true);
+				joinMuc(conversation);
+				Bundle options = new Bundle();
+				options.putString("muc#roomconfig_persistentroom", "1");
+				options.putString("muc#roomconfig_membersonly", "1");
+				options.putString("muc#roomconfig_publicroom", "0");
+				options.putString("muc#roomconfig_whois", "anyone");
+				pushConferenceConfiguration(conversation, options, new OnConferenceOptionsPushed() {
+					@Override
+					public void onPushSucceeded() {
+						for (Jid invite : jids) {
+							invite(conversation, invite);
+						}
+						if (callback != null) {
+							callback.success(conversation);
+						}
+					}
+
+					@Override
+					public void onPushFailed() {
+						if (callback != null) {
+							callback.error(R.string.conference_creation_failed, conversation);
+						}
+					}
+				});
+
+			} catch (InvalidJidException e) {
+				if (callback != null) {
+					callback.error(R.string.conference_creation_failed, null);
+				}
+			}
+		} else {
+			if (callback != null) {
+				callback.error(R.string.not_connected_try_again, null);
+			}
+		}
+	}
+
+	public void fetchConferenceConfiguration(final Conversation conversation) {
+		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
+		request.setTo(conversation.getJid().toBareJid());
+		request.query("http://jabber.org/protocol/disco#info");
+		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() != IqPacket.TYPE.ERROR) {
+					ArrayList<String> features = new ArrayList<>();
+					for (Element child : packet.query().getChildren()) {
+						if (child != null && child.getName().equals("feature")) {
+							String var = child.getAttribute("var");
+							if (var != null) {
+								features.add(var);
+							}
+						}
+					}
+					conversation.getMucOptions().updateFeatures(features);
+					updateConversationUi();
+				}
+			}
+		});
+	}
+
+	public void pushConferenceConfiguration(final Conversation conversation, final Bundle options, final OnConferenceOptionsPushed callback) {
+		IqPacket request = new IqPacket(IqPacket.TYPE.GET);
+		request.setTo(conversation.getJid().toBareJid());
+		request.query("http://jabber.org/protocol/muc#owner");
+		sendIqPacket(conversation.getAccount(), request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() != IqPacket.TYPE.ERROR) {
+					Data data = Data.parse(packet.query().findChild("x", "jabber:x:data"));
+					for (Field field : data.getFields()) {
+						if (options.containsKey(field.getName())) {
+							field.setValue(options.getString(field.getName()));
+						}
+					}
+					data.submit();
+					IqPacket set = new IqPacket(IqPacket.TYPE.SET);
+					set.setTo(conversation.getJid().toBareJid());
+					set.query("http://jabber.org/protocol/muc#owner").addChild(data);
+					sendIqPacket(account, set, new OnIqPacketReceived() {
+						@Override
+						public void onIqPacketReceived(Account account, IqPacket packet) {
+							if (packet.getType() == IqPacket.TYPE.RESULT) {
+								if (callback != null) {
+									callback.onPushSucceeded();
+								}
+							} else {
+								if (callback != null) {
+									callback.onPushFailed();
+								}
+							}
+						}
+					});
+				} else {
+					if (callback != null) {
+						callback.onPushFailed();
+					}
+				}
+			}
+		});
+	}
+
+	public void pushSubjectToConference(final Conversation conference, final String subject) {
+		MessagePacket packet = this.getMessageGenerator().conferenceSubject(conference, subject);
+		this.sendMessagePacket(conference.getAccount(), packet);
+		final MucOptions mucOptions = conference.getMucOptions();
+		final MucOptions.User self = mucOptions.getSelf();
+		if (!mucOptions.persistent() && self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
+			Bundle options = new Bundle();
+			options.putString("muc#roomconfig_persistentroom", "1");
+			this.pushConferenceConfiguration(conference, options, null);
+		}
+	}
+
+	public void changeAffiliationInConference(final Conversation conference, Jid user, MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {
+		final Jid jid = user.toBareJid();
+		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());
+		sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					callback.onAffiliationChangedSuccessful(jid);
+				} else {
+					callback.onAffiliationChangeFailed(jid, R.string.could_not_change_affiliation);
+				}
+			}
+		});
+	}
+
+	public void changeAffiliationsInConference(final Conversation conference, MucOptions.Affiliation before, MucOptions.Affiliation after) {
+		List<Jid> jids = new ArrayList<>();
+		for (MucOptions.User user : conference.getMucOptions().getUsers()) {
+			if (user.getAffiliation() == before) {
+				jids.add(user.getJid());
+			}
+		}
+		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jids, after.toString());
+		sendIqPacket(conference.getAccount(), request, null);
+	}
+
+	public void changeRoleInConference(final Conversation conference, final String nick, MucOptions.Role role, final OnRoleChanged callback) {
+		IqPacket request = this.mIqGenerator.changeRole(conference, nick, role.toString());
+		Log.d(Config.LOGTAG, request.toString());
+		sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				Log.d(Config.LOGTAG, packet.toString());
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					callback.onRoleChangedSuccessful(nick);
+				} else {
+					callback.onRoleChangeFailed(nick, R.string.could_not_change_role);
+				}
+			}
+		});
+	}
+
+	public void disconnect(Account account, boolean force) {
+		if ((account.getStatus() == Account.State.ONLINE)
+				|| (account.getStatus() == Account.State.DISABLED)) {
+			if (!force) {
+				List<Conversation> conversations = getConversations();
+				for (Conversation conversation : conversations) {
+					if (conversation.getAccount() == account) {
+						if (conversation.getMode() == Conversation.MODE_MULTI) {
+							leaveMuc(conversation);
+						} else {
+							if (conversation.endOtrIfNeeded()) {
+								Log.d(Config.LOGTAG, account.getJid().toBareJid()
+										+ ": ended otr session with "
+										+ conversation.getJid());
+							}
+						}
+					}
+				}
+			}
+			account.getXmppConnection().disconnect(force);
+		}
+	}
+
+	@Override
+	public IBinder onBind(Intent intent) {
+		return mBinder;
+	}
+
+	public void updateMessage(Message message) {
+		databaseBackend.updateMessage(message);
+		updateConversationUi();
+	}
+
+	protected void syncDirtyContacts(Account account) {
+		for (Contact contact : account.getRoster().getContacts()) {
+			if (contact.getOption(Contact.Options.DIRTY_PUSH)) {
+				pushContactToServer(contact);
+			}
+			if (contact.getOption(Contact.Options.DIRTY_DELETE)) {
+				deleteContactOnServer(contact);
+			}
+		}
+	}
+
+	public void createContact(Contact contact) {
+		SharedPreferences sharedPref = getPreferences();
+		boolean autoGrant = sharedPref.getBoolean("grant_new_contacts", true);
+		if (autoGrant) {
+			contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
+			contact.setOption(Contact.Options.ASKING);
+		}
+		pushContactToServer(contact);
+	}
+
+	public void onOtrSessionEstablished(Conversation conversation) {
+		final Account account = conversation.getAccount();
+		final Session otrSession = conversation.getOtrSession();
+		Log.d(Config.LOGTAG,
+				account.getJid().toBareJid() + " otr session established with "
+						+ conversation.getJid() + "/"
+						+ otrSession.getSessionID().getUserID());
+		conversation.findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+
+			@Override
+			public void onMessageFound(Message message) {
+				SessionID id = otrSession.getSessionID();
+				try {
+					message.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
+				} catch (InvalidJidException e) {
+					return;
+				}
+				if (message.getType() == Message.TYPE_TEXT) {
+					MessagePacket outPacket = mMessageGenerator.generateOtrChat(message, true);
+					if (outPacket != null) {
+						message.setStatus(Message.STATUS_SEND);
+						databaseBackend.updateMessage(message);
+						sendMessagePacket(account, outPacket);
+					}
+				} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+					mJingleConnectionManager.createNewConnection(message);
+				}
+				updateConversationUi();
+			}
+		});
+	}
+
+	public boolean renewSymmetricKey(Conversation conversation) {
+		Account account = conversation.getAccount();
+		byte[] symmetricKey = new byte[32];
+		this.mRandom.nextBytes(symmetricKey);
+		Session otrSession = conversation.getOtrSession();
+		if (otrSession != null) {
+			MessagePacket packet = new MessagePacket();
+			packet.setType(MessagePacket.TYPE_CHAT);
+			packet.setFrom(account.getJid());
+			packet.addChild("private", "urn:xmpp:carbons:2");
+			packet.addChild("no-copy", "urn:xmpp:hints");
+			packet.setAttribute("to", otrSession.getSessionID().getAccountID() + "/"
+					+ otrSession.getSessionID().getUserID());
+			try {
+				packet.setBody(otrSession
+						.transformSending(CryptoHelper.FILETRANSFER
+								+ CryptoHelper.bytesToHex(symmetricKey))[0]);
+				sendMessagePacket(account, packet);
+				conversation.setSymmetricKey(symmetricKey);
+				return true;
+			} catch (OtrException e) {
+				return false;
+			}
+		}
+		return false;
+	}
+
+	public void pushContactToServer(final Contact contact) {
+		contact.resetOption(Contact.Options.DIRTY_DELETE);
+		contact.setOption(Contact.Options.DIRTY_PUSH);
+		final Account account = contact.getAccount();
+		if (account.getStatus() == Account.State.ONLINE) {
+			final boolean ask = contact.getOption(Contact.Options.ASKING);
+			final boolean sendUpdates = contact
+					.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
+					&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
+			final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+			iq.query(Xmlns.ROSTER).addChild(contact.asElement());
+			account.getXmppConnection().sendIqPacket(iq, null);
+			if (sendUpdates) {
+				sendPresencePacket(account,
+						mPresenceGenerator.sendPresenceUpdatesTo(contact));
+			}
+			if (ask) {
+				sendPresencePacket(account,
+						mPresenceGenerator.requestPresenceUpdatesFrom(contact));
+			}
+		}
+	}
+
+	public void publishAvatar(final Account account,
+							  final Uri image,
+							  final UiCallback<Avatar> callback) {
+		final Bitmap.CompressFormat format = Config.AVATAR_FORMAT;
+		final int size = Config.AVATAR_SIZE;
+		final Avatar avatar = getFileBackend()
+				.getPepAvatar(image, size, format);
+		if (avatar != null) {
+			avatar.height = size;
+			avatar.width = size;
+			if (format.equals(Bitmap.CompressFormat.WEBP)) {
+				avatar.type = "image/webp";
+			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
+				avatar.type = "image/jpeg";
+			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
+				avatar.type = "image/png";
+			}
+			if (!getFileBackend().save(avatar)) {
+				callback.error(R.string.error_saving_avatar, avatar);
+				return;
+			}
+			final IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
+			this.sendIqPacket(account, packet, new OnIqPacketReceived() {
+
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket result) {
+					if (result.getType() == IqPacket.TYPE.RESULT) {
+						final IqPacket packet = XmppConnectionService.this.mIqGenerator
+								.publishAvatarMetadata(avatar);
+						sendIqPacket(account, packet, new OnIqPacketReceived() {
+
+							@Override
+							public void onIqPacketReceived(Account account,
+														   IqPacket result) {
+								if (result.getType() == IqPacket.TYPE.RESULT) {
+									if (account.setAvatar(avatar.getFilename())) {
+										databaseBackend.updateAccount(account);
+									}
+									callback.success(avatar);
+								} else {
+									callback.error(
+											R.string.error_publish_avatar_server_reject,
+											avatar);
+								}
+							}
+						});
+					} else {
+						callback.error(
+								R.string.error_publish_avatar_server_reject,
+								avatar);
+					}
+				}
+			});
+		} else {
+			callback.error(R.string.error_publish_avatar_converting, null);
+		}
+	}
+
+	public void fetchAvatar(Account account, Avatar avatar) {
+		fetchAvatar(account, avatar, null);
+	}
+
+	public void fetchAvatar(Account account, final Avatar avatar,
+							final UiCallback<Avatar> callback) {
+		IqPacket packet = this.mIqGenerator.retrieveAvatar(avatar);
+		sendIqPacket(account, packet, new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket result) {
+				final String ERROR = account.getJid().toBareJid()
+						+ ": fetching avatar for " + avatar.owner + " failed ";
+				if (result.getType() == IqPacket.TYPE.RESULT) {
+					avatar.image = mIqParser.avatarData(result);
+					if (avatar.image != null) {
+						if (getFileBackend().save(avatar)) {
+							if (account.getJid().toBareJid().equals(avatar.owner)) {
+								if (account.setAvatar(avatar.getFilename())) {
+									databaseBackend.updateAccount(account);
+								}
+								getAvatarService().clear(account);
+								updateConversationUi();
+								updateAccountUi();
+							} else {
+								Contact contact = account.getRoster()
+										.getContact(avatar.owner);
+								contact.setAvatar(avatar.getFilename());
+								getAvatarService().clear(contact);
+								updateConversationUi();
+								updateRosterUi();
+							}
+							if (callback != null) {
+								callback.success(avatar);
+							}
+							Log.d(Config.LOGTAG, account.getJid().toBareJid()
+									+ ": succesfully fetched avatar for "
+									+ avatar.owner);
+							return;
+						}
+					} else {
+
+						Log.d(Config.LOGTAG, ERROR + "(parsing error)");
+					}
+				} else {
+					Element error = result.findChild("error");
+					if (error == null) {
+						Log.d(Config.LOGTAG, ERROR + "(server error)");
+					} else {
+						Log.d(Config.LOGTAG, ERROR + error.toString());
+					}
+				}
+				if (callback != null) {
+					callback.error(0, null);
+				}
+
+			}
+		});
+	}
+
+	public void checkForAvatar(Account account,
+							   final UiCallback<Avatar> callback) {
+		IqPacket packet = this.mIqGenerator.retrieveAvatarMetaData(null);
+		this.sendIqPacket(account, packet, new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					Element pubsub = packet.findChild("pubsub",
+							"http://jabber.org/protocol/pubsub");
+					if (pubsub != null) {
+						Element items = pubsub.findChild("items");
+						if (items != null) {
+							Avatar avatar = Avatar.parseMetadata(items);
+							if (avatar != null) {
+								avatar.owner = account.getJid().toBareJid();
+								if (fileBackend.isAvatarCached(avatar)) {
+									if (account.setAvatar(avatar.getFilename())) {
+										databaseBackend.updateAccount(account);
+									}
+									getAvatarService().clear(account);
+									callback.success(avatar);
+								} else {
+									fetchAvatar(account, avatar, callback);
+								}
+								return;
+							}
+						}
+					}
+				}
+				callback.error(0, null);
+			}
+		});
+	}
+
+	public void deleteContactOnServer(Contact contact) {
+		contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
+		contact.resetOption(Contact.Options.DIRTY_PUSH);
+		contact.setOption(Contact.Options.DIRTY_DELETE);
+		Account account = contact.getAccount();
+		if (account.getStatus() == Account.State.ONLINE) {
+			IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+			Element item = iq.query(Xmlns.ROSTER).addChild("item");
+			item.setAttribute("jid", contact.getJid().toString());
+			item.setAttribute("subscription", "remove");
+			account.getXmppConnection().sendIqPacket(iq, null);
+		}
+	}
+
+	public void updateConversation(Conversation conversation) {
+		this.databaseBackend.updateConversation(conversation);
+	}
+
+	public void reconnectAccount(final Account account, final boolean force) {
+		synchronized (account) {
+			if (account.getXmppConnection() != null) {
+				disconnect(account, force);
+			}
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				if (account.getXmppConnection() == null) {
+					account.setXmppConnection(createConnection(account));
+				}
+				Thread thread = new Thread(account.getXmppConnection());
+				thread.start();
+				scheduleWakeUpCall(Config.CONNECT_TIMEOUT, account.getUuid().hashCode());
+			} else {
+				account.getRoster().clearPresences();
+				account.setXmppConnection(null);
+			}
+		}
+	}
+
+	public void reconnectAccountInBackground(final Account account) {
+		new Thread(new Runnable() {
+			@Override
+			public void run() {
+				reconnectAccount(account,false);
+			}
+		}).start();
+	}
+
+	public void invite(Conversation conversation, Jid contact) {
+		MessagePacket packet = mMessageGenerator.invite(conversation, contact);
+		sendMessagePacket(conversation.getAccount(), packet);
+	}
+
+	public void resetSendingToWaiting(Account account) {
+		for (Conversation conversation : getConversations()) {
+			if (conversation.getAccount() == account) {
+				conversation.findUnsentTextMessages(new Conversation.OnMessageFound() {
+
+					@Override
+					public void onMessageFound(Message message) {
+						markMessage(message, Message.STATUS_WAITING);
+					}
+				});
+			}
+		}
+	}
+
+	public Message markMessage(final Account account, final Jid recipient, final String uuid, final int status) {
+		if (uuid == null) {
+			return null;
+		}
+		for (Conversation conversation : getConversations()) {
+			if (conversation.getJid().toBareJid().equals(recipient) && conversation.getAccount() == account) {
+				final Message message = conversation.findSentMessageWithUuid(uuid);
+				if (message != null) {
+					markMessage(message, status);
+				}
+				return message;
+			}
+		}
+		return null;
+	}
+
+	public boolean markMessage(Conversation conversation, String uuid,
+							   int status) {
+		if (uuid == null) {
+			return false;
+		} else {
+			Message message = conversation.findSentMessageWithUuid(uuid);
+			if (message != null) {
+				markMessage(message, status);
+				return true;
+			} else {
+				return false;
+			}
+		}
+	}
+
+	public void markMessage(Message message, int status) {
+		if (status == Message.STATUS_SEND_FAILED
+				&& (message.getStatus() == Message.STATUS_SEND_RECEIVED || message
+				.getStatus() == Message.STATUS_SEND_DISPLAYED)) {
+			return;
+		}
+		message.setStatus(status);
+		databaseBackend.updateMessage(message);
+		updateConversationUi();
+	}
+
+	public SharedPreferences getPreferences() {
+		return PreferenceManager
+				.getDefaultSharedPreferences(getApplicationContext());
+	}
+
+	public boolean forceEncryption() {
+		return getPreferences().getBoolean("force_encryption", false);
+	}
+
+	public boolean sendChatStates() {
+		return getPreferences().getBoolean("chat_states", false);
+	}
+
+	public boolean saveEncryptedMessages() {
+		return !getPreferences().getBoolean("dont_save_encrypted", false);
+	}
+
+	public boolean indicateReceived() {
+		return getPreferences().getBoolean("indicate_received", false);
+	}
+
+	public int unreadCount() {
+		int count = 0;
+		for(Conversation conversation : getConversations()) {
+			count += conversation.unreadCount();
+		}
+		return count;
+	}
+
+	public void updateConversationUi() {
+		if (mOnConversationUpdate != null) {
+			mOnConversationUpdate.onConversationUpdate();
+		}
+	}
+
+	public void updateAccountUi() {
+		if (mOnAccountUpdate != null) {
+			mOnAccountUpdate.onAccountUpdate();
+		}
+	}
+
+	public void updateRosterUi() {
+		if (mOnRosterUpdate != null) {
+			mOnRosterUpdate.onRosterUpdate();
+		}
+	}
+
+	public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
+		if (mOnUpdateBlocklist != null) {
+			mOnUpdateBlocklist.OnUpdateBlocklist(status);
+		}
+	}
+
+	public void updateMucRosterUi() {
+		if (mOnMucRosterUpdate != null) {
+			mOnMucRosterUpdate.onMucRosterUpdate();
+		}
+	}
+
+	public Account findAccountByJid(final Jid accountJid) {
+		for (Account account : this.accounts) {
+			if (account.getJid().toBareJid().equals(accountJid.toBareJid())) {
+				return account;
+			}
+		}
+		return null;
+	}
+
+	public Conversation findConversationByUuid(String uuid) {
+		for (Conversation conversation : getConversations()) {
+			if (conversation.getUuid().equals(uuid)) {
+				return conversation;
+			}
+		}
+		return null;
+	}
+
+	public void markRead(final Conversation conversation) {
+		mNotificationService.clear(conversation);
+		conversation.markRead();
+	}
+
+	public void sendReadMarker(final Conversation conversation) {
+		final Message markable = conversation.getLatestMarkableMessage();
+		this.markRead(conversation);
+		if (Settings.CONFIRM_MESSAGE_READ && markable != null && markable.getRemoteMsgId() != null) {
+			Log.d(Config.LOGTAG, conversation.getAccount().getJid().toBareJid() + ": sending read marker to " + markable.getCounterpart().toString());
+			Account account = conversation.getAccount();
+			final Jid to = markable.getCounterpart();
+			MessagePacket packet = mMessageGenerator.confirm(account, to, markable.getRemoteMsgId());
+			this.sendMessagePacket(conversation.getAccount(), packet);
+		}
+		updateConversationUi();
+	}
+
+	public SecureRandom getRNG() {
+		return this.mRandom;
+	}
+
+	public MemorizingTrustManager getMemorizingTrustManager() {
+		return this.mMemorizingTrustManager;
+	}
+
+	public PowerManager getPowerManager() {
+		return this.pm;
+	}
+
+	public LruCache<String, Bitmap> getBitmapCache() {
+		return this.mBitmapCache;
+	}
+
+	public void syncRosterToDisk(final Account account) {
+		new Thread(new Runnable() {
+
+			@Override
+			public void run() {
+				databaseBackend.writeRoster(account.getRoster());
+			}
+		}).start();
+
+	}
+
+	public List<String> getKnownHosts() {
+		final List<String> hosts = new ArrayList<>();
+		for (final Account account : getAccounts()) {
+			if (!hosts.contains(account.getServer().toString())) {
+				hosts.add(account.getServer().toString());
+			}
+			for (final Contact contact : account.getRoster().getContacts()) {
+				if (contact.showInRoster()) {
+					final String server = contact.getServer().toString();
+					if (server != null && !hosts.contains(server)) {
+						hosts.add(server);
+					}
+				}
+			}
+		}
+		return hosts;
+	}
+
+	public List<String> getKnownConferenceHosts() {
+		final ArrayList<String> mucServers = new ArrayList<>();
+		for (final Account account : accounts) {
+			if (account.getXmppConnection() != null) {
+				final String server = account.getXmppConnection().getMucServer();
+				if (server != null && !mucServers.contains(server)) {
+					mucServers.add(server);
+				}
+			}
+		}
+		return mucServers;
+	}
+
+	public void sendMessagePacket(Account account, MessagePacket packet) {
+		XmppConnection connection = account.getXmppConnection();
+		if (connection != null) {
+			connection.sendMessagePacket(packet);
+		}
+	}
+
+	public void sendPresencePacket(Account account, PresencePacket packet) {
+		XmppConnection connection = account.getXmppConnection();
+		if (connection != null) {
+			connection.sendPresencePacket(packet);
+		}
+	}
+
+	public void sendIqPacket(final Account account, final IqPacket packet, final OnIqPacketReceived callback) {
+		final XmppConnection connection = account.getXmppConnection();
+		if (connection != null) {
+			connection.sendIqPacket(packet, callback);
+		}
+	}
+
+	public void sendPresence(final Account account) {
+		sendPresencePacket(account, mPresenceGenerator.sendPresence(account));
+	}
+
+	public MessageGenerator getMessageGenerator() {
+		return this.mMessageGenerator;
+	}
+
+	public PresenceGenerator getPresenceGenerator() {
+		return this.mPresenceGenerator;
+	}
+
+	public IqGenerator getIqGenerator() {
+		return this.mIqGenerator;
+	}
+
+	public IqParser getIqParser() {
+		return this.mIqParser;
+	}
+
+	public JingleConnectionManager getJingleConnectionManager() {
+		return this.mJingleConnectionManager;
+	}
+
+	public MessageArchiveService getMessageArchiveService() {
+		return this.mMessageArchiveService;
+	}
+
+	public List<Contact> findContacts(Jid jid) {
+		ArrayList<Contact> contacts = new ArrayList<>();
+		for (Account account : getAccounts()) {
+			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+				Contact contact = account.getRoster().getContactFromRoster(jid);
+				if (contact != null) {
+					contacts.add(contact);
+				}
+			}
+		}
+		return contacts;
+	}
+
+	public NotificationService getNotificationService() {
+		return this.mNotificationService;
+	}
+
+	public HttpConnectionManager getHttpConnectionManager() {
+		return this.mHttpConnectionManager;
+	}
+
+	public void resendFailedMessages(final Message message) {
+		final Collection<Message> messages = new ArrayList<>();
+		Message current = message;
+		while (current.getStatus() == Message.STATUS_SEND_FAILED) {
+			messages.add(current);
+			if (current.mergeable(current.next())) {
+				current = current.next();
+			} else {
+				break;
+			}
+		}
+		for (final Message msg : messages) {
+			markMessage(msg, Message.STATUS_WAITING);
+			this.resendMessage(msg);
+		}
+	}
+
+	public void clearConversationHistory(final Conversation conversation) {
+		conversation.clearMessages();
+		conversation.setHasMessagesLeftOnServer(false); //avoid messages getting loaded through mam
+		new Thread(new Runnable() {
+			@Override
+			public void run() {
+				databaseBackend.deleteMessagesInConversation(conversation);
+			}
+		}).start();
+	}
+
+	public void sendBlockRequest(final Blockable blockable) {
+		if (blockable != null && blockable.getBlockedJid() != null) {
+			final Jid jid = blockable.getBlockedJid();
+			this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetBlockRequest(jid), new OnIqPacketReceived() {
+
+				@Override
+				public void onIqPacketReceived(final Account account, final IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE.RESULT) {
+						account.getBlocklist().add(jid);
+						updateBlocklistUi(OnUpdateBlocklist.Status.BLOCKED);
+					}
+				}
+			});
+		}
+	}
+
+	public void sendUnblockRequest(final Blockable blockable) {
+		if (blockable != null && blockable.getJid() != null) {
+			final Jid jid = blockable.getBlockedJid();
+			this.sendIqPacket(blockable.getAccount(), getIqGenerator().generateSetUnblockRequest(jid), new OnIqPacketReceived() {
+				@Override
+				public void onIqPacketReceived(final Account account, final IqPacket packet) {
+					if (packet.getType() == IqPacket.TYPE.RESULT) {
+						account.getBlocklist().remove(jid);
+						updateBlocklistUi(OnUpdateBlocklist.Status.UNBLOCKED);
+					}
+				}
+			});
+		}
+	}
+
+	public interface OnMoreMessagesLoaded {
+		public void onMoreMessagesLoaded(int count, Conversation conversation);
+
+		public void informUser(int r);
+	}
+
+	public interface OnAccountPasswordChanged {
+		public void onPasswordChangeSucceeded();
+
+		public void onPasswordChangeFailed();
+	}
+
+	public interface OnAffiliationChanged {
+		public void onAffiliationChangedSuccessful(Jid jid);
+
+		public void onAffiliationChangeFailed(Jid jid, int resId);
+	}
+
+	public interface OnRoleChanged {
+		public void onRoleChangedSuccessful(String nick);
+
+		public void onRoleChangeFailed(String nick, int resid);
+	}
+
+	public interface OnConversationUpdate {
+		public void onConversationUpdate();
+	}
+
+	public interface OnAccountUpdate {
+		public void onAccountUpdate();
+	}
+
+	public interface OnRosterUpdate {
+		public void onRosterUpdate();
+	}
+
+	public interface OnMucRosterUpdate {
+		public void onMucRosterUpdate();
+	}
+
+	public interface OnConferenceOptionsPushed {
+		public void onPushSucceeded();
+
+		public void onPushFailed();
+	}
+
+	public class XmppConnectionBinder extends Binder {
+		public XmppConnectionService getService() {
+			return XmppConnectionService.this;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/AboutActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/AboutActivity.java
new file mode 100644
index 00000000..fd8a187a
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/AboutActivity.java
@@ -0,0 +1,15 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+import de.thedevstack.conversationsplus.R;
+
+public class AboutActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_about);
+    }
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/AboutPreference.java b/src/main/java/de/thedevstack/conversationsplus/ui/AboutPreference.java
new file mode 100644
index 00000000..c1fd4d67
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/AboutPreference.java
@@ -0,0 +1,32 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.content.Intent;
+import android.preference.Preference;
+import android.util.AttributeSet;
+
+import de.thedevstack.conversationsplus.utils.PhoneHelper;
+
+public class AboutPreference extends Preference {
+	public AboutPreference(final Context context, final AttributeSet attrs, final int defStyle) {
+		super(context, attrs, defStyle);
+		setSummary();
+	}
+
+	public AboutPreference(final Context context, final AttributeSet attrs) {
+		super(context, attrs);
+		setSummary();
+	}
+
+    @Override
+    protected void onClick() {
+        super.onClick();
+        final Intent intent = new Intent(getContext(), AboutActivity.class);
+        getContext().startActivity(intent);
+    }
+
+    private void setSummary() {
+		setSummary("Conversations+ " + PhoneHelper.getVersionName(getContext()));
+	}
+}
+
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/AbstractSearchableListItemActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/AbstractSearchableListItemActivity.java
new file mode 100644
index 00000000..b8e57f47
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/AbstractSearchableListItemActivity.java
@@ -0,0 +1,124 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.ArrayAdapter;
+import android.widget.EditText;
+import android.widget.ListView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.ui.adapter.ListItemAdapter;
+
+public abstract class AbstractSearchableListItemActivity extends XmppActivity {
+	private ListView mListView;
+	private final List<ListItem> listItems = new ArrayList<>();
+	private ArrayAdapter<ListItem> mListItemsAdapter;
+
+	private EditText mSearchEditText;
+
+	private final MenuItem.OnActionExpandListener mOnActionExpandListener = new MenuItem.OnActionExpandListener() {
+
+		@Override
+		public boolean onMenuItemActionExpand(final MenuItem item) {
+			mSearchEditText.post(new Runnable() {
+
+				@Override
+				public void run() {
+					mSearchEditText.requestFocus();
+					final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+					imm.showSoftInput(mSearchEditText,
+							InputMethodManager.SHOW_IMPLICIT);
+				}
+			});
+
+			return true;
+		}
+
+		@Override
+		public boolean onMenuItemActionCollapse(final MenuItem item) {
+			final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+			imm.hideSoftInputFromWindow(mSearchEditText.getWindowToken(),
+					InputMethodManager.HIDE_IMPLICIT_ONLY);
+			mSearchEditText.setText("");
+			filterContacts();
+			return true;
+		}
+	};
+
+	private final TextWatcher mSearchTextWatcher = new TextWatcher() {
+
+		@Override
+		public void afterTextChanged(final Editable editable) {
+			filterContacts(editable.toString());
+		}
+
+		@Override
+		public void beforeTextChanged(final CharSequence s, final int start, final int count,
+				final int after) {
+		}
+
+		@Override
+		public void onTextChanged(final CharSequence s, final int start, final int before,
+				final int count) {
+		}
+	};
+
+	public ListView getListView() {
+		return mListView;
+	}
+
+	public List<ListItem> getListItems() {
+		return listItems;
+	}
+
+	public EditText getSearchEditText() {
+		return mSearchEditText;
+	}
+
+	public ArrayAdapter<ListItem> getListItemAdapter() {
+		return mListItemsAdapter;
+	}
+
+	@Override
+	public void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_choose_contact);
+		mListView = (ListView) findViewById(R.id.choose_contact_list);
+		mListView.setFastScrollEnabled(true);
+		mListItemsAdapter = new ListItemAdapter(this, listItems);
+		mListView.setAdapter(mListItemsAdapter);
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		getMenuInflater().inflate(R.menu.choose_contact, menu);
+		final MenuItem menuSearchView = menu.findItem(R.id.action_search);
+		final View mSearchView = menuSearchView.getActionView();
+		mSearchEditText = (EditText) mSearchView
+			.findViewById(R.id.search_field);
+		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
+		menuSearchView.setOnActionExpandListener(mOnActionExpandListener);
+		return true;
+	}
+
+	protected void filterContacts() {
+		filterContacts(null);
+	}
+
+	protected abstract void filterContacts(final String needle);
+
+	@Override
+	void onBackendConnected() {
+		filterContacts();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/BlockContactDialog.java b/src/main/java/de/thedevstack/conversationsplus/ui/BlockContactDialog.java
new file mode 100644
index 00000000..589f565c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/BlockContactDialog.java
@@ -0,0 +1,41 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Blockable;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+
+public final class BlockContactDialog {
+	public static void show(final Context context,
+			final XmppConnectionService xmppConnectionService,
+			final Blockable blockable) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(context);
+		final boolean isBlocked = blockable.isBlocked();
+		builder.setNegativeButton(R.string.cancel, null);
+
+		if (blockable.getJid().isDomainJid() || blockable.getAccount().isBlocked(blockable.getJid().toDomainJid())) {
+			builder.setTitle(isBlocked ? R.string.action_unblock_domain : R.string.action_block_domain);
+			builder.setMessage(context.getResources().getString(isBlocked ? R.string.unblock_domain_text : R.string.block_domain_text,
+						blockable.getJid().toDomainJid()));
+		} else {
+			builder.setTitle(isBlocked ? R.string.action_unblock_contact : R.string.action_block_contact);
+			builder.setMessage(context.getResources().getString(isBlocked ? R.string.unblock_contact_text : R.string.block_contact_text,
+						blockable.getJid().toBareJid()));
+		}
+		builder.setPositiveButton(isBlocked ? R.string.unblock : R.string.block, new DialogInterface.OnClickListener() {
+
+			@Override
+			public void onClick(final DialogInterface dialog, final int which) {
+				if (isBlocked) {
+					xmppConnectionService.sendUnblockRequest(blockable);
+				} else {
+					xmppConnectionService.sendBlockRequest(blockable);
+				}
+			}
+		});
+		builder.create().show();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java
new file mode 100644
index 00000000..4e6d7701
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/BlocklistActivity.java
@@ -0,0 +1,75 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.os.Bundle;
+import android.text.Editable;
+import android.view.View;
+import android.widget.AdapterView;
+
+import java.util.Collections;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class BlocklistActivity extends AbstractSearchableListItemActivity implements OnUpdateBlocklist {
+
+	private Account account = null;
+
+	@Override
+	public void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+
+			@Override
+			public boolean onItemLongClick(final AdapterView<?> parent,
+					final View view,
+					final int position,
+					final long id) {
+				BlockContactDialog.show(parent.getContext(), xmppConnectionService,(Contact) getListItems().get(position));
+				return true;
+			}
+		});
+	}
+
+	@Override
+	public void onBackendConnected() {
+		for (final Account account : xmppConnectionService.getAccounts()) {
+			if (account.getJid().toString().equals(getIntent().getStringExtra("account"))) {
+				this.account = account;
+				break;
+			}
+		}
+		filterContacts();
+	}
+
+	@Override
+	protected void filterContacts(final String needle) {
+		getListItems().clear();
+		if (account != null) {
+			for (final Jid jid : account.getBlocklist()) {
+				final Contact contact = account.getRoster().getContact(jid);
+				if (contact.match(needle) && contact.isBlocked()) {
+					getListItems().add(contact);
+				}
+			}
+			Collections.sort(getListItems());
+		}
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				getListItemAdapter().notifyDataSetChanged();
+			}
+		});
+	}
+
+	@Override
+	public void OnUpdateBlocklist(final OnUpdateBlocklist.Status status) {
+		final Editable editable = getSearchEditText().getText();
+		if (editable != null) {
+			filterContacts(editable.toString());
+		} else {
+			filterContacts();
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java
new file mode 100644
index 00000000..9d6b50fc
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ChangePasswordActivity.java
@@ -0,0 +1,109 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class ChangePasswordActivity extends XmppActivity implements XmppConnectionService.OnAccountPasswordChanged {
+
+	private Button mChangePasswordButton;
+	private View.OnClickListener mOnChangePasswordButtonClicked = new View.OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			if (mAccount != null) {
+				final String currentPassword = mCurrentPassword.getText().toString();
+				final String newPassword = mNewPassword.getText().toString();
+				final String newPasswordConfirm = mNewPasswordConfirm.getText().toString();
+				if (!currentPassword.equals(mAccount.getPassword())) {
+					mCurrentPassword.requestFocus();
+					mCurrentPassword.setError(getString(R.string.account_status_unauthorized));
+				} else if (!newPassword.equals(newPasswordConfirm)) {
+                    mNewPasswordConfirm.requestFocus();
+                    mNewPasswordConfirm.setError(getString(R.string.passwords_do_not_match));
+                } else if (newPassword.isEmpty()) {
+                    mNewPassword.requestFocus();
+                    mNewPassword.setError(getString(R.string.password_should_not_be_empty));
+				} else if (newPassword.trim().isEmpty()) {
+					mNewPassword.requestFocus();
+					mNewPassword.setError(getString(R.string.password_should_not_contain_only_spaces));
+				} else {
+					mCurrentPassword.setError(null);
+					mNewPassword.setError(null);
+					mNewPasswordConfirm.setError(null);
+					xmppConnectionService.updateAccountPasswordOnServer(mAccount, newPassword, ChangePasswordActivity.this);
+					mChangePasswordButton.setEnabled(false);
+					mChangePasswordButton.setTextColor(getSecondaryTextColor());
+					mChangePasswordButton.setText(R.string.updating);
+				}
+			}
+		}
+	};
+	private EditText mCurrentPassword;
+	private EditText mNewPassword;
+	private EditText mNewPasswordConfirm;
+	private Account mAccount;
+
+	@Override
+	void onBackendConnected() {
+		try {
+			final String jid = getIntent() == null ? null : getIntent().getStringExtra("account");
+			if (jid != null) {
+				this.mAccount = xmppConnectionService.findAccountByJid(Jid.fromString(jid));
+			}
+		} catch (final InvalidJidException ignored) {
+
+		}
+
+	}
+
+	@Override
+	protected void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_change_password);
+		Button mCancelButton = (Button) findViewById(R.id.left_button);
+		mCancelButton.setOnClickListener(new View.OnClickListener() {
+			@Override
+			public void onClick(View view) {
+				finish();
+			}
+		});
+		this.mChangePasswordButton = (Button) findViewById(R.id.right_button);
+		this.mChangePasswordButton.setOnClickListener(this.mOnChangePasswordButtonClicked);
+		this.mCurrentPassword = (EditText) findViewById(R.id.current_password);
+		this.mNewPassword = (EditText) findViewById(R.id.new_password);
+		this.mNewPasswordConfirm = (EditText) findViewById(R.id.new_password_confirm);
+	}
+
+	@Override
+	public void onPasswordChangeSucceeded() {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(ChangePasswordActivity.this,R.string.password_changed,Toast.LENGTH_LONG).show();
+				finish();
+			}
+		});
+	}
+
+	@Override
+	public void onPasswordChangeFailed() {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				mNewPassword.setError(getString(R.string.could_not_change_password));
+				mChangePasswordButton.setEnabled(true);
+				mChangePasswordButton.setTextColor(getPrimaryTextColor());
+				mChangePasswordButton.setText(R.string.change_password);
+			}
+		});
+
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java
new file mode 100644
index 00000000..d51d23e1
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ChooseContactActivity.java
@@ -0,0 +1,152 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AbsListView.MultiChoiceModeListener;
+import android.widget.AdapterView;
+import android.widget.ListView;
+
+import java.util.Set;
+import java.util.HashSet;
+import java.util.Collections;
+import java.util.List;
+import java.util.ArrayList;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.ListItem;
+
+public class ChooseContactActivity extends AbstractSearchableListItemActivity {
+
+	private Set<Contact> selected;
+	private Set<String> filterContacts;
+
+	@Override
+	public void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		filterContacts = new HashSet<>();
+		String[] contacts = getIntent().getStringArrayExtra("filter_contacts");
+		if (contacts != null) {
+			Collections.addAll(filterContacts, contacts);
+		}
+
+		if (getIntent().getBooleanExtra("multiple", false)) {
+			getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
+			getListView().setMultiChoiceModeListener(new MultiChoiceModeListener() {
+
+				@Override
+				public  boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+					return false;
+				}
+
+				@Override
+				public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+					final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+					imm.hideSoftInputFromWindow(getSearchEditText().getWindowToken(),
+							InputMethodManager.HIDE_IMPLICIT_ONLY);
+					MenuInflater inflater = getMenuInflater();
+					inflater.inflate(R.menu.select_multiple, menu);
+					selected = new HashSet<Contact>();
+					return true;
+				}
+
+				@Override
+				public void onDestroyActionMode(ActionMode mode) {
+				}
+
+				@Override
+				public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+					switch(item.getItemId()) {
+						case R.id.selection_submit:
+							final Intent request = getIntent();
+							final Intent data = new Intent();
+							data.putExtra("conversation",
+									request.getStringExtra("conversation"));
+							String[] selection = getSelectedContactJids();
+							data.putExtra("contacts", selection);
+							data.putExtra("multiple", true);
+							setResult(RESULT_OK, data);
+							finish();
+							return true;
+					}
+					return false;
+				}
+
+				@Override
+				public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
+					Contact item = (Contact) getListItems().get(position);
+					if (checked) {
+						selected.add(item);
+					} else {
+						selected.remove(item);
+					}
+					int numSelected = selected.size();
+					MenuItem selectButton = mode.getMenu().findItem(R.id.selection_submit);
+					String buttonText = getResources().getQuantityString(R.plurals.select_contact,
+							numSelected, numSelected);
+					selectButton.setTitle(buttonText);
+				}
+			});
+		}
+
+		getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
+
+			@Override
+			public void onItemClick(final AdapterView<?> parent, final View view,
+					final int position, final long id) {
+				final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+				imm.hideSoftInputFromWindow(getSearchEditText().getWindowToken(),
+						InputMethodManager.HIDE_IMPLICIT_ONLY);
+				final Intent request = getIntent();
+				final Intent data = new Intent();
+				final ListItem mListItem = getListItems().get(position);
+				data.putExtra("contact", mListItem.getJid().toString());
+				String account = request.getStringExtra("account");
+				if (account == null && mListItem instanceof Contact) {
+					account = ((Contact) mListItem).getAccount().getJid().toBareJid().toString();
+				}
+				data.putExtra("account", account);
+				data.putExtra("conversation",
+						request.getStringExtra("conversation"));
+				data.putExtra("multiple", false);
+				setResult(RESULT_OK, data);
+				finish();
+			}
+		});
+
+	}
+
+	protected void filterContacts(final String needle) {
+		getListItems().clear();
+		for (final Account account : xmppConnectionService.getAccounts()) {
+			if (account.getStatus() != Account.State.DISABLED) {
+				for (final Contact contact : account.getRoster().getContacts()) {
+					if (contact.showInRoster() &&
+							!filterContacts.contains(contact.getJid().toBareJid().toString())
+							&& contact.match(needle)) {
+						getListItems().add(contact);
+					}
+				}
+			}
+		}
+		Collections.sort(getListItems());
+		getListItemAdapter().notifyDataSetChanged();
+	}
+
+	private String[] getSelectedContactJids() {
+		List<String> result = new ArrayList<>();
+		for (Contact contact : selected) {
+			result.add(contact.getJid().toString());
+		}
+		return result.toArray(new String[result.size()]);
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java
new file mode 100644
index 00000000..553e5c89
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConferenceDetailsActivity.java
@@ -0,0 +1,562 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.annotation.TargetApi;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.IntentSender.SendIntentException;
+import android.graphics.Bitmap;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.ContextMenu;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.openintents.openpgp.util.OpenPgpUtils;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Bookmark;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.entities.MucOptions.User;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnMucRosterUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnConversationUpdate;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class ConferenceDetailsActivity extends XmppActivity implements OnConversationUpdate, OnMucRosterUpdate, XmppConnectionService.OnAffiliationChanged, XmppConnectionService.OnRoleChanged, XmppConnectionService.OnConferenceOptionsPushed {
+	public static final String ACTION_VIEW_MUC = "view_muc";
+	private Conversation mConversation;
+	private OnClickListener inviteListener = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			inviteToConversation(mConversation);
+		}
+	};
+	private TextView mYourNick;
+	private ImageView mYourPhoto;
+	private ImageButton mEditNickButton;
+	private TextView mRoleAffiliaton;
+	private TextView mFullJid;
+	private TextView mAccountJid;
+	private LinearLayout membersView;
+	private LinearLayout mMoreDetails;
+	private TextView mConferenceType;
+	private ImageButton mChangeConferenceSettingsButton;
+	private Button mInviteButton;
+	private String uuid = null;
+	private User mSelectedUser = null;
+
+	private boolean mAdvancedMode = false;
+
+	private UiCallback<Conversation> renameCallback = new UiCallback<Conversation>() {
+		@Override
+		public void success(Conversation object) {
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					Toast.makeText(ConferenceDetailsActivity.this,getString(R.string.your_nick_has_been_changed),Toast.LENGTH_SHORT).show();
+					updateView();
+				}
+			});
+
+		}
+
+		@Override
+		public void error(final int errorCode, Conversation object) {
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					Toast.makeText(ConferenceDetailsActivity.this,getString(errorCode),Toast.LENGTH_SHORT).show();
+				}
+			});
+		}
+
+		@Override
+		public void userInputRequried(PendingIntent pi, Conversation object) {
+
+		}
+	};
+	private OnClickListener mChangeConferenceSettings = new OnClickListener() {
+		@Override
+		public void onClick(View v) {
+			final MucOptions mucOptions = mConversation.getMucOptions();
+			AlertDialog.Builder builder = new AlertDialog.Builder(ConferenceDetailsActivity.this);
+			builder.setTitle(R.string.conference_options);
+			String[] options = {getString(R.string.members_only),
+					getString(R.string.non_anonymous)};
+			final boolean[] values = new boolean[options.length];
+			values[0] = mucOptions.membersOnly();
+			values[1] = mucOptions.nonanonymous();
+			builder.setMultiChoiceItems(options,values,new DialogInterface.OnMultiChoiceClickListener() {
+				@Override
+				public void onClick(DialogInterface dialog, int which, boolean isChecked) {
+					values[which] = isChecked;
+				}
+			});
+			builder.setNegativeButton(R.string.cancel, null);
+			builder.setPositiveButton(R.string.confirm,new DialogInterface.OnClickListener() {
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					if (!mucOptions.membersOnly() && values[0]) {
+						xmppConnectionService.changeAffiliationsInConference(mConversation,
+								MucOptions.Affiliation.NONE,
+								MucOptions.Affiliation.MEMBER);
+					}
+					Bundle options = new Bundle();
+					options.putString("muc#roomconfig_membersonly", values[0] ? "1" : "0");
+					options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
+					options.putString("muc#roomconfig_persistentroom", "1");
+					xmppConnectionService.pushConferenceConfiguration(mConversation,
+							options,
+							ConferenceDetailsActivity.this);
+				}
+			});
+			builder.create().show();
+		}
+	};
+	private OnValueEdited onSubjectEdited = new OnValueEdited() {
+
+		@Override
+		public void onValueEdited(String value) {
+			xmppConnectionService.pushSubjectToConference(mConversation,value);
+		}
+	};
+
+	@Override
+	public void onConversationUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	public void onMucRosterUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		updateView();
+	}
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_muc_details);
+		mYourNick = (TextView) findViewById(R.id.muc_your_nick);
+		mYourPhoto = (ImageView) findViewById(R.id.your_photo);
+		mEditNickButton = (ImageButton) findViewById(R.id.edit_nick_button);
+		mFullJid = (TextView) findViewById(R.id.muc_jabberid);
+		membersView = (LinearLayout) findViewById(R.id.muc_members);
+		mAccountJid = (TextView) findViewById(R.id.details_account);
+		mMoreDetails = (LinearLayout) findViewById(R.id.muc_more_details);
+		mMoreDetails.setVisibility(View.GONE);
+		mChangeConferenceSettingsButton = (ImageButton) findViewById(R.id.change_conference_button);
+		mChangeConferenceSettingsButton.setOnClickListener(this.mChangeConferenceSettings);
+		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
+		mInviteButton = (Button) findViewById(R.id.invite);
+		mInviteButton.setOnClickListener(inviteListener);
+		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
+		if (getActionBar() != null) {
+			getActionBar().setHomeButtonEnabled(true);
+			getActionBar().setDisplayHomeAsUpEnabled(true);
+		}
+		mEditNickButton.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				quickEdit(mConversation.getMucOptions().getActualNick(),
+						new OnValueEdited() {
+
+							@Override
+							public void onValueEdited(String value) {
+								xmppConnectionService.renameInMuc(mConversation,value,renameCallback);
+							}
+						});
+			}
+		});
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem menuItem) {
+		switch (menuItem.getItemId()) {
+			case android.R.id.home:
+				finish();
+				break;
+			case R.id.action_edit_subject:
+				if (mConversation != null) {
+					quickEdit(mConversation.getName(),this.onSubjectEdited);
+				}
+				break;
+			case R.id.action_save_as_bookmark:
+				saveAsBookmark();
+				break;
+			case R.id.action_delete_bookmark:
+				deleteBookmark();
+				break;
+			case R.id.action_advanced_mode:
+				this.mAdvancedMode = !menuItem.isChecked();
+				menuItem.setChecked(this.mAdvancedMode);
+				invalidateOptionsMenu();
+				updateView();
+				break;
+		}
+		return super.onOptionsItemSelected(menuItem);
+	}
+
+	@Override
+	protected String getShareableUri() {
+		if (mConversation != null) {
+			return "xmpp:" + mConversation.getJid().toBareJid().toString() + "?join";
+		} else {
+			return "";
+		}
+	}
+
+	@Override
+	public boolean onPrepareOptionsMenu(Menu menu) {
+		MenuItem menuItemSaveBookmark = menu.findItem(R.id.action_save_as_bookmark);
+		MenuItem menuItemDeleteBookmark = menu.findItem(R.id.action_delete_bookmark);
+		MenuItem menuItemAdvancedMode = menu.findItem(R.id.action_advanced_mode);
+		menuItemAdvancedMode.setChecked(mAdvancedMode);
+		Account account = mConversation.getAccount();
+		if (account.hasBookmarkFor(mConversation.getJid().toBareJid())) {
+			menuItemSaveBookmark.setVisible(false);
+			menuItemDeleteBookmark.setVisible(true);
+		} else {
+			menuItemDeleteBookmark.setVisible(false);
+			menuItemSaveBookmark.setVisible(true);
+		}
+		return true;
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		getMenuInflater().inflate(R.menu.muc_details, menu);
+		return true;
+	}
+
+	@Override
+	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
+		Object tag = v.getTag();
+		if (tag instanceof User) {
+			getMenuInflater().inflate(R.menu.muc_details_context,menu);
+			final User user = (User) tag;
+			final User self = mConversation.getMucOptions().getSelf();
+			this.mSelectedUser = user;
+			String name;
+			if (user.getJid() != null) {
+				final Contact contact = user.getContact();
+				if (contact != null) {
+					name = contact.getDisplayName();
+				} else {
+					name = user.getJid().toBareJid().toString();
+				}
+				menu.setHeaderTitle(name);
+				MenuItem startConversation = menu.findItem(R.id.start_conversation);
+				MenuItem giveMembership = menu.findItem(R.id.give_membership);
+				MenuItem removeMembership = menu.findItem(R.id.remove_membership);
+				MenuItem giveAdminPrivileges = menu.findItem(R.id.give_admin_privileges);
+				MenuItem removeAdminPrivileges = menu.findItem(R.id.remove_admin_privileges);
+				MenuItem removeFromRoom = menu.findItem(R.id.remove_from_room);
+				MenuItem banFromConference = menu.findItem(R.id.ban_from_conference);
+				startConversation.setVisible(true);
+				if (self.getAffiliation().ranks(MucOptions.Affiliation.ADMIN) &&
+						self.getAffiliation().outranks(user.getAffiliation())) {
+					if (mAdvancedMode) {
+						if (user.getAffiliation() == MucOptions.Affiliation.NONE) {
+							giveMembership.setVisible(true);
+						} else {
+							removeMembership.setVisible(true);
+						}
+						banFromConference.setVisible(true);
+					} else {
+						removeFromRoom.setVisible(true);
+					}
+					if (user.getAffiliation() != MucOptions.Affiliation.ADMIN) {
+						giveAdminPrivileges.setVisible(true);
+					} else {
+						removeAdminPrivileges.setVisible(true);
+					}
+				}
+			}
+
+		}
+		super.onCreateContextMenu(menu,v,menuInfo);
+	}
+
+	@Override
+	public boolean onContextItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.start_conversation:
+				startConversation(mSelectedUser);
+				return true;
+			case R.id.give_admin_privileges:
+				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.ADMIN,this);
+				return true;
+			case R.id.give_membership:
+				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.MEMBER,this);
+				return true;
+			case R.id.remove_membership:
+				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.NONE,this);
+				return true;
+			case R.id.remove_admin_privileges:
+				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.MEMBER,this);
+				return true;
+			case R.id.remove_from_room:
+				removeFromRoom(mSelectedUser);
+				return true;
+			case R.id.ban_from_conference:
+				xmppConnectionService.changeAffiliationInConference(mConversation,mSelectedUser.getJid(), MucOptions.Affiliation.OUTCAST,this);
+				xmppConnectionService.changeRoleInConference(mConversation,mSelectedUser.getName(), MucOptions.Role.NONE,this);
+				return true;
+			default:
+				return super.onContextItemSelected(item);
+		}
+	}
+
+	private void removeFromRoom(final User user) {
+		if (mConversation.getMucOptions().membersOnly()) {
+			xmppConnectionService.changeAffiliationInConference(mConversation,user.getJid(), MucOptions.Affiliation.NONE,this);
+			xmppConnectionService.changeRoleInConference(mConversation,mSelectedUser.getName(), MucOptions.Role.NONE,ConferenceDetailsActivity.this);
+		} else {
+			AlertDialog.Builder builder = new AlertDialog.Builder(this);
+			builder.setTitle(R.string.ban_from_conference);
+			builder.setMessage(getString(R.string.removing_from_public_conference,user.getName()));
+			builder.setNegativeButton(R.string.cancel,null);
+			builder.setPositiveButton(R.string.ban_now,new DialogInterface.OnClickListener() {
+				@Override
+				public void onClick(DialogInterface dialog, int which) {
+					xmppConnectionService.changeAffiliationInConference(mConversation,user.getJid(), MucOptions.Affiliation.OUTCAST,ConferenceDetailsActivity.this);
+					xmppConnectionService.changeRoleInConference(mConversation,mSelectedUser.getName(), MucOptions.Role.NONE,ConferenceDetailsActivity.this);
+				}
+			});
+			builder.create().show();
+		}
+	}
+
+	protected void startConversation(User user) {
+		if (user.getJid() != null) {
+			Conversation conversation = xmppConnectionService.findOrCreateConversation(this.mConversation.getAccount(),user.getJid().toBareJid(),false);
+			switchToConversation(conversation);
+		}
+	}
+
+	protected void saveAsBookmark() {
+		Account account = mConversation.getAccount();
+		Bookmark bookmark = new Bookmark(account, mConversation.getJid().toBareJid());
+		if (!mConversation.getJid().isBareJid()) {
+			bookmark.setNick(mConversation.getJid().getResourcepart());
+		}
+		bookmark.setAutojoin(true);
+		account.getBookmarks().add(bookmark);
+		xmppConnectionService.pushBookmarks(account);
+		mConversation.setBookmark(bookmark);
+	}
+
+	protected void deleteBookmark() {
+		Account account = mConversation.getAccount();
+		Bookmark bookmark = mConversation.getBookmark();
+		bookmark.unregisterConversation();
+		account.getBookmarks().remove(bookmark);
+		xmppConnectionService.pushBookmarks(account);
+	}
+
+	@Override
+	void onBackendConnected() {
+		if (getIntent().getAction().equals(ACTION_VIEW_MUC)) {
+			this.uuid = getIntent().getExtras().getString("uuid");
+		}
+		if (uuid != null) {
+			this.mConversation = xmppConnectionService
+				.findConversationByUuid(uuid);
+			if (this.mConversation != null) {
+				updateView();
+			}
+		}
+	}
+
+	private void updateView() {
+		final MucOptions mucOptions = mConversation.getMucOptions();
+		final User self = mucOptions.getSelf();
+		mAccountJid.setText(getString(R.string.using_account, mConversation
+					.getAccount().getJid().toBareJid()));
+		mYourPhoto.setImageBitmap(avatarService().get(mConversation.getAccount(), getPixel(48)));
+		setTitle(mConversation.getName());
+		mFullJid.setText(mConversation.getJid().toBareJid().toString());
+		mYourNick.setText(mucOptions.getActualNick());
+		mRoleAffiliaton = (TextView) findViewById(R.id.muc_role);
+		if (mucOptions.online()) {
+			mMoreDetails.setVisibility(View.VISIBLE);
+			final String status = getStatus(self);
+			if (status != null) {
+				mRoleAffiliaton.setVisibility(View.VISIBLE);
+				mRoleAffiliaton.setText(status);
+			} else {
+				mRoleAffiliaton.setVisibility(View.GONE);
+			}
+			if (mucOptions.membersOnly()) {
+				mConferenceType.setText(R.string.private_conference);
+			} else {
+				mConferenceType.setText(R.string.public_conference);
+			}
+			if (self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
+				mChangeConferenceSettingsButton.setVisibility(View.VISIBLE);
+			} else {
+				mChangeConferenceSettingsButton.setVisibility(View.GONE);
+			}
+		}
+		LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+		membersView.removeAllViews();
+		final ArrayList<User> users = new ArrayList<>();
+		users.addAll(mConversation.getMucOptions().getUsers());
+		Collections.sort(users,new Comparator<User>() {
+			@Override
+			public int compare(User lhs, User rhs) {
+				return lhs.getName().compareToIgnoreCase(rhs.getName());
+			}
+		});
+		for (final User user : users) {
+			View view = inflater.inflate(R.layout.contact, membersView,false);
+			this.setListItemBackgroundOnView(view);
+			view.setOnClickListener(new OnClickListener() {
+				@Override
+				public void onClick(View view) {
+					highlightInMuc(mConversation, user.getName());
+				}
+			});
+			registerForContextMenu(view);
+			view.setTag(user);
+			TextView tvDisplayName = (TextView) view.findViewById(R.id.contact_display_name);
+			TextView tvKey = (TextView) view.findViewById(R.id.key);
+			TextView tvStatus = (TextView) view.findViewById(R.id.contact_jid);
+			if (mAdvancedMode && user.getPgpKeyId() != 0) {
+				tvKey.setVisibility(View.VISIBLE);
+				tvKey.setOnClickListener(new OnClickListener() {
+
+					@Override
+					public void onClick(View v) {
+						viewPgpKey(user);
+					}
+				});
+				tvKey.setText(OpenPgpUtils.convertKeyIdToHex(user.getPgpKeyId()));
+			}
+			Bitmap bm;
+			Contact contact = user.getContact();
+			if (contact != null) {
+				bm = avatarService().get(contact, getPixel(48));
+				tvDisplayName.setText(contact.getDisplayName());
+				tvStatus.setText(user.getName() + " \u2022 " + getStatus(user));
+			} else {
+				bm = avatarService().get(user.getName(), getPixel(48));
+				tvDisplayName.setText(user.getName());
+				tvStatus.setText(getStatus(user));
+
+			}
+			ImageView iv = (ImageView) view.findViewById(R.id.contact_photo);
+			iv.setImageBitmap(bm);
+			membersView.addView(view);
+			if (mConversation.getMucOptions().canInvite()) {
+				mInviteButton.setVisibility(View.VISIBLE);
+			} else {
+				mInviteButton.setVisibility(View.GONE);
+			}
+		}
+	}
+
+	private String getStatus(User user) {
+		if (mAdvancedMode) {
+			StringBuilder builder = new StringBuilder();
+			builder.append(getString(user.getAffiliation().getResId()));
+			builder.append(" (");
+			builder.append(getString(user.getRole().getResId()));
+			builder.append(')');
+			return builder.toString();
+		} else {
+			return getString(user.getAffiliation().getResId());
+		}
+	}
+
+	@SuppressWarnings("deprecation")
+	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+	private void setListItemBackgroundOnView(View view) {
+		int sdk = android.os.Build.VERSION.SDK_INT;
+		if (sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
+			view.setBackgroundDrawable(getResources().getDrawable(R.drawable.greybackground));
+		} else {
+			view.setBackground(getResources().getDrawable(R.drawable.greybackground));
+		}
+	}
+
+	private void viewPgpKey(User user) {
+		PgpEngine pgp = xmppConnectionService.getPgpEngine();
+		if (pgp != null) {
+			PendingIntent intent = pgp.getIntentForKey(
+					mConversation.getAccount(), user.getPgpKeyId());
+			if (intent != null) {
+				try {
+					startIntentSenderForResult(intent.getIntentSender(), 0,
+							null, 0, 0, 0);
+				} catch (SendIntentException ignored) {
+
+				}
+			}
+		}
+	}
+
+	@Override
+	public void onAffiliationChangedSuccessful(Jid jid) {
+
+	}
+
+	@Override
+	public void onAffiliationChangeFailed(Jid jid, int resId) {
+		displayToast(getString(resId,jid.toBareJid().toString()));
+	}
+
+	@Override
+	public void onRoleChangedSuccessful(String nick) {
+
+	}
+
+	@Override
+	public void onRoleChangeFailed(String nick, int resId) {
+		displayToast(getString(resId,nick));
+	}
+
+	@Override
+	public void onPushSucceeded() {
+		displayToast(getString(R.string.modified_conference_options));
+	}
+
+	@Override
+	public void onPushFailed() {
+		displayToast(getString(R.string.could_not_modify_conference_options));
+	}
+
+	private void displayToast(final String msg) {
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				Toast.makeText(ConferenceDetailsActivity.this,msg,Toast.LENGTH_SHORT).show();
+			}
+		});
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java
new file mode 100644
index 00000000..2edad444
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ContactDetailsActivity.java
@@ -0,0 +1,471 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentSender.SendIntentException;
+import android.content.SharedPreferences;
+import android.net.Uri;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.provider.ContactsContract.CommonDataKinds;
+import android.provider.ContactsContract.Contacts;
+import android.provider.ContactsContract.Intents;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.QuickContactBadge;
+import android.widget.TextView;
+
+import org.openintents.openpgp.util.OpenPgpUtils;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterUpdate;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class ContactDetailsActivity extends XmppActivity implements OnAccountUpdate, OnRosterUpdate, OnUpdateBlocklist {
+	public static final String ACTION_VIEW_CONTACT = "view_contact";
+
+	private Contact contact;
+	private DialogInterface.OnClickListener removeFromRoster = new DialogInterface.OnClickListener() {
+
+		@Override
+		public void onClick(DialogInterface dialog, int which) {
+			xmppConnectionService.deleteContactOnServer(contact);
+		}
+	};
+	private OnCheckedChangeListener mOnSendCheckedChange = new OnCheckedChangeListener() {
+
+		@Override
+		public void onCheckedChanged(CompoundButton buttonView,
+				boolean isChecked) {
+			if (isChecked) {
+				if (contact
+						.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
+					xmppConnectionService.sendPresencePacket(contact
+							.getAccount(),
+							xmppConnectionService.getPresenceGenerator()
+							.sendPresenceUpdatesTo(contact));
+				} else {
+					contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
+				}
+			} else {
+				contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
+				xmppConnectionService.sendPresencePacket(contact.getAccount(),
+						xmppConnectionService.getPresenceGenerator()
+						.stopPresenceUpdatesTo(contact));
+			}
+		}
+	};
+	private OnCheckedChangeListener mOnReceiveCheckedChange = new OnCheckedChangeListener() {
+
+		@Override
+		public void onCheckedChanged(CompoundButton buttonView,
+				boolean isChecked) {
+			if (isChecked) {
+				xmppConnectionService.sendPresencePacket(contact.getAccount(),
+						xmppConnectionService.getPresenceGenerator()
+						.requestPresenceUpdatesFrom(contact));
+			} else {
+				xmppConnectionService.sendPresencePacket(contact.getAccount(),
+						xmppConnectionService.getPresenceGenerator()
+						.stopPresenceUpdatesFrom(contact));
+			}
+		}
+	};
+	private Jid accountJid;
+	private Jid contactJid;
+	private TextView contactJidTv;
+	private TextView accountJidTv;
+	private TextView lastseen;
+	private CheckBox send;
+	private CheckBox receive;
+	private Button addContactButton;
+	private QuickContactBadge badge;
+	private LinearLayout keys;
+	private LinearLayout tags;
+	private boolean showDynamicTags;
+
+	private DialogInterface.OnClickListener addToPhonebook = new DialogInterface.OnClickListener() {
+
+		@Override
+		public void onClick(DialogInterface dialog, int which) {
+			Intent intent = new Intent(Intent.ACTION_INSERT_OR_EDIT);
+			intent.setType(Contacts.CONTENT_ITEM_TYPE);
+			intent.putExtra(Intents.Insert.IM_HANDLE, contact.getJid().toString());
+			intent.putExtra(Intents.Insert.IM_PROTOCOL,
+					CommonDataKinds.Im.PROTOCOL_JABBER);
+			intent.putExtra("finishActivityOnSaveCompleted", true);
+			ContactDetailsActivity.this.startActivityForResult(intent, 0);
+		}
+	};
+
+	private OnClickListener onBadgeClick = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			AlertDialog.Builder builder = new AlertDialog.Builder(
+					ContactDetailsActivity.this);
+			builder.setTitle(getString(R.string.action_add_phone_book));
+			builder.setMessage(getString(R.string.add_phone_book_text,
+						contact.getJid()));
+			builder.setNegativeButton(getString(R.string.cancel), null);
+			builder.setPositiveButton(getString(R.string.add), addToPhonebook);
+			builder.create().show();
+		}
+	};
+
+	@Override
+	public void onRosterUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	public void onAccountUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		invalidateOptionsMenu();
+		populateView();
+	}
+
+	@Override
+	protected String getShareableUri() {
+		if (contact != null) {
+			return contact.getShareableUri();
+		} else {
+			return "";
+		}
+	}
+
+	@Override
+	protected void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		if (getIntent().getAction().equals(ACTION_VIEW_CONTACT)) {
+			try {
+				this.accountJid = Jid.fromString(getIntent().getExtras().getString("account"));
+			} catch (final InvalidJidException ignored) {
+			}
+			try {
+				this.contactJid = Jid.fromString(getIntent().getExtras().getString("contact"));
+			} catch (final InvalidJidException ignored) {
+			}
+		}
+		setContentView(R.layout.activity_contact_details);
+
+		contactJidTv = (TextView) findViewById(R.id.details_contactjid);
+		accountJidTv = (TextView) findViewById(R.id.details_account);
+		lastseen = (TextView) findViewById(R.id.details_lastseen);
+		send = (CheckBox) findViewById(R.id.details_send_presence);
+		receive = (CheckBox) findViewById(R.id.details_receive_presence);
+		badge = (QuickContactBadge) findViewById(R.id.details_contact_badge);
+		addContactButton = (Button) findViewById(R.id.add_contact_button);
+		addContactButton.setOnClickListener(new OnClickListener() {
+			@Override
+			public void onClick(View view) {
+				showAddToRosterDialog(contact);
+			}
+		});
+		keys = (LinearLayout) findViewById(R.id.details_contact_keys);
+		tags = (LinearLayout) findViewById(R.id.tags);
+		if (getActionBar() != null) {
+			getActionBar().setHomeButtonEnabled(true);
+			getActionBar().setDisplayHomeAsUpEnabled(true);
+		}
+
+		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+		this.showDynamicTags = preferences.getBoolean("show_dynamic_tags",false);
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem menuItem) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		switch (menuItem.getItemId()) {
+			case android.R.id.home:
+				finish();
+				break;
+			case R.id.action_delete_contact:
+				builder.setTitle(getString(R.string.action_delete_contact))
+					.setMessage(
+							getString(R.string.remove_contact_text,
+								contact.getJid()))
+					.setPositiveButton(getString(R.string.delete),
+							removeFromRoster).create().show();
+				break;
+			case R.id.action_edit_contact:
+				if (contact.getSystemAccount() == null) {
+					quickEdit(contact.getDisplayName(), new OnValueEdited() {
+
+						@Override
+						public void onValueEdited(String value) {
+							contact.setServerName(value);
+							ContactDetailsActivity.this.xmppConnectionService
+								.pushContactToServer(contact);
+							populateView();
+						}
+					});
+				} else {
+					Intent intent = new Intent(Intent.ACTION_EDIT);
+					String[] systemAccount = contact.getSystemAccount().split("#");
+					long id = Long.parseLong(systemAccount[0]);
+					Uri uri = Contacts.getLookupUri(id, systemAccount[1]);
+					intent.setDataAndType(uri, Contacts.CONTENT_ITEM_TYPE);
+					intent.putExtra("finishActivityOnSaveCompleted", true);
+					startActivity(intent);
+				}
+				break;
+			case R.id.action_block:
+				BlockContactDialog.show(this, xmppConnectionService, contact);
+				break;
+			case R.id.action_unblock:
+				BlockContactDialog.show(this, xmppConnectionService, contact);
+				break;
+		}
+		return super.onOptionsItemSelected(menuItem);
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		getMenuInflater().inflate(R.menu.contact_details, menu);
+		MenuItem block = menu.findItem(R.id.action_block);
+		MenuItem unblock = menu.findItem(R.id.action_unblock);
+		MenuItem edit = menu.findItem(R.id.action_edit_contact);
+		MenuItem delete = menu.findItem(R.id.action_delete_contact);
+		final XmppConnection connection = contact.getAccount().getXmppConnection();
+		if (connection != null && connection.getFeatures().blocking()) {
+			if (this.contact.isBlocked()) {
+				menu.findItem(R.id.action_block).setVisible(false);
+			} else {
+				menu.findItem(R.id.action_unblock).setVisible(false);
+			}
+		} else {
+			menu.findItem(R.id.action_unblock).setVisible(false);
+			menu.findItem(R.id.action_block).setVisible(false);
+		}
+		if (!contact.showInRoster()) {
+			edit.setVisible(false);
+			delete.setVisible(false);
+		}
+		return true;
+	}
+
+	private void populateView() {
+		setTitle(contact.getDisplayName());
+		if (contact.showInRoster()) {
+			send.setVisibility(View.VISIBLE);
+			receive.setVisibility(View.VISIBLE);
+			addContactButton.setVisibility(View.GONE);
+			send.setOnCheckedChangeListener(null);
+			receive.setOnCheckedChangeListener(null);
+
+			if (contact.getOption(Contact.Options.FROM)) {
+				send.setText(R.string.send_presence_updates);
+				send.setChecked(true);
+			} else if (contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
+				send.setChecked(false);
+				send.setText(R.string.send_presence_updates);
+			} else {
+				send.setText(R.string.preemptively_grant);
+				if (contact.getOption(Contact.Options.PREEMPTIVE_GRANT)) {
+					send.setChecked(true);
+				} else {
+					send.setChecked(false);
+				}
+			}
+			if (contact.getOption(Contact.Options.TO)) {
+				receive.setText(R.string.receive_presence_updates);
+				receive.setChecked(true);
+			} else {
+				receive.setText(R.string.ask_for_presence_updates);
+				if (contact.getOption(Contact.Options.ASKING)) {
+					receive.setChecked(true);
+				} else {
+					receive.setChecked(false);
+				}
+			}
+			if (contact.getAccount().isOnlineAndConnected()) {
+				receive.setEnabled(true);
+				send.setEnabled(true);
+			} else {
+				receive.setEnabled(false);
+				send.setEnabled(false);
+			}
+
+			send.setOnCheckedChangeListener(this.mOnSendCheckedChange);
+			receive.setOnCheckedChangeListener(this.mOnReceiveCheckedChange);
+		} else {
+			addContactButton.setVisibility(View.VISIBLE);
+			send.setVisibility(View.GONE);
+			receive.setVisibility(View.GONE);
+		}
+
+		if (contact.isBlocked() && !this.showDynamicTags) {
+			lastseen.setText(R.string.contact_blocked);
+		} else {
+			lastseen.setText(UIHelper.lastseen(getApplicationContext(), contact.lastseen.time));
+		}
+
+		if (contact.getPresences().size() > 1) {
+			contactJidTv.setText(contact.getJid() + " ("
+					+ contact.getPresences().size() + ")");
+		} else {
+			contactJidTv.setText(contact.getJid().toString());
+		}
+		accountJidTv.setText(getString(R.string.using_account, contact
+					.getAccount().getJid().toBareJid()));
+		prepareContactBadge(badge, contact);
+		if (contact.getSystemAccount() == null) {
+			badge.setOnClickListener(onBadgeClick);
+		}
+
+		keys.removeAllViews();
+		boolean hasKeys = false;
+		LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+		for(final String otrFingerprint : contact.getOtrFingerprints()) {
+			hasKeys = true;
+			View view = inflater.inflate(R.layout.contact_key, keys, false);
+			TextView key = (TextView) view.findViewById(R.id.key);
+			TextView keyType = (TextView) view.findViewById(R.id.key_type);
+			ImageButton remove = (ImageButton) view
+				.findViewById(R.id.button_remove);
+			remove.setVisibility(View.VISIBLE);
+			keyType.setText("OTR Fingerprint");
+			key.setText(CryptoHelper.prettifyFingerprint(otrFingerprint));
+			keys.addView(view);
+			remove.setOnClickListener(new OnClickListener() {
+
+				@Override
+				public void onClick(View v) {
+					confirmToDeleteFingerprint(otrFingerprint);
+				}
+			});
+		}
+		if (contact.getPgpKeyId() != 0) {
+			hasKeys = true;
+			View view = inflater.inflate(R.layout.contact_key, keys, false);
+			TextView key = (TextView) view.findViewById(R.id.key);
+			TextView keyType = (TextView) view.findViewById(R.id.key_type);
+			keyType.setText("PGP Key ID");
+			key.setText(OpenPgpUtils.convertKeyIdToHex(contact.getPgpKeyId()));
+			view.setOnClickListener(new OnClickListener() {
+
+				@Override
+				public void onClick(View v) {
+					PgpEngine pgp = ContactDetailsActivity.this.xmppConnectionService
+						.getPgpEngine();
+					if (pgp != null) {
+						PendingIntent intent = pgp.getIntentForKey(contact);
+						if (intent != null) {
+							try {
+								startIntentSenderForResult(
+										intent.getIntentSender(), 0, null, 0,
+										0, 0);
+							} catch (SendIntentException e) {
+
+							}
+						}
+					}
+				}
+			});
+			keys.addView(view);
+		}
+		if (hasKeys) {
+			keys.setVisibility(View.VISIBLE);
+		} else {
+			keys.setVisibility(View.GONE);
+		}
+
+		List<ListItem.Tag> tagList = contact.getTags();
+		if (tagList.size() == 0 || !this.showDynamicTags) {
+			tags.setVisibility(View.GONE);
+		} else {
+			tags.setVisibility(View.VISIBLE);
+			tags.removeAllViewsInLayout();
+			for(final ListItem.Tag tag : tagList) {
+				final TextView tv = (TextView) inflater.inflate(R.layout.list_item_tag,tags,false);
+				tv.setText(tag.getName());
+				tv.setBackgroundColor(tag.getColor());
+				tags.addView(tv);
+			}
+		}
+	}
+
+	private void prepareContactBadge(QuickContactBadge badge, Contact contact) {
+		if (contact.getSystemAccount() != null) {
+			String[] systemAccount = contact.getSystemAccount().split("#");
+			long id = Long.parseLong(systemAccount[0]);
+			badge.assignContactUri(Contacts.getLookupUri(id, systemAccount[1]));
+		}
+		badge.setImageBitmap(avatarService().get(contact, getPixel(72)));
+	}
+
+	protected void confirmToDeleteFingerprint(final String fingerprint) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.delete_fingerprint);
+		builder.setMessage(R.string.sure_delete_fingerprint);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.delete,
+				new android.content.DialogInterface.OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						if (contact.deleteOtrFingerprint(fingerprint)) {
+							populateView();
+							xmppConnectionService.syncRosterToDisk(contact.getAccount());
+						}
+					}
+
+				});
+		builder.create().show();
+	}
+
+	@Override
+	public void onBackendConnected() {
+		if ((accountJid != null) && (contactJid != null)) {
+			Account account = xmppConnectionService
+				.findAccountByJid(accountJid);
+			if (account == null) {
+				return;
+			}
+			this.contact = account.getRoster().getContact(contactJid);
+			populateView();
+		}
+	}
+
+	@Override
+	public void OnUpdateBlocklist(final Status status) {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				invalidateOptionsMenu();
+				populateView();
+			}
+		});
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
new file mode 100644
index 00000000..123be06f
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
@@ -0,0 +1,1115 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.annotation.SuppressLint;
+import android.app.ActionBar;
+import android.app.AlertDialog;
+import android.app.FragmentTransaction;
+import android.app.PendingIntent;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.content.IntentSender.SendIntentException;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.provider.MediaStore;
+import android.support.v4.widget.SlidingPaneLayout;
+import android.support.v4.widget.SlidingPaneLayout.PanelSlideListener;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
+import android.widget.ListView;
+import android.widget.PopupMenu;
+import android.widget.PopupMenu.OnMenuItemClickListener;
+import android.widget.Toast;
+
+import net.java.otr4j.session.SessionStatus;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Blockable;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnConversationUpdate;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterUpdate;
+import de.thedevstack.conversationsplus.ui.adapter.ConversationAdapter;
+import de.thedevstack.conversationsplus.utils.ExceptionHelper;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+
+public class ConversationActivity extends XmppActivity
+	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist {
+
+	public static final String ACTION_DOWNLOAD = "eu.siacs.conversations.action.DOWNLOAD";
+
+	public static final String VIEW_CONVERSATION = "viewConversation";
+	public static final String CONVERSATION = "conversationUuid";
+	public static final String MESSAGE = "messageUuid";
+	public static final String TEXT = "text";
+	public static final String NICK = "nick";
+
+	public static final int REQUEST_SEND_MESSAGE = 0x0201;
+	public static final int REQUEST_DECRYPT_PGP = 0x0202;
+	public static final int REQUEST_ENCRYPT_MESSAGE = 0x0207;
+	private static final int ATTACHMENT_CHOICE_CHOOSE_IMAGE = 0x0301;
+	private static final int ATTACHMENT_CHOICE_TAKE_PHOTO = 0x0302;
+	private static final int ATTACHMENT_CHOICE_CHOOSE_FILE = 0x0303;
+	private static final int ATTACHMENT_CHOICE_RECORD_VOICE = 0x0304;
+	private static final int ATTACHMENT_CHOICE_LOCATION = 0x0305;
+	private static final String STATE_OPEN_CONVERSATION = "state_open_conversation";
+	private static final String STATE_PANEL_OPEN = "state_panel_open";
+	private static final String STATE_PENDING_URI = "state_pending_uri";
+
+	private String mOpenConverstaion = null;
+	private boolean mPanelOpen = true;
+	private Uri mPendingImageUri = null;
+	private Uri mPendingFileUri = null;
+	private Uri mPendingGeoUri = null;
+
+	private View mContentView;
+
+	private List<Conversation> conversationList = new ArrayList<>();
+	private Conversation mSelectedConversation = null;
+	private ListView listView;
+	private ConversationFragment mConversationFragment;
+
+	private ArrayAdapter<Conversation> listAdapter;
+
+	private Toast prepareFileToast;
+
+	private boolean mActivityPaused = false;
+	private boolean mRedirected = true;
+
+	public Conversation getSelectedConversation() {
+		return this.mSelectedConversation;
+	}
+
+	public void setSelectedConversation(Conversation conversation) {
+		this.mSelectedConversation = conversation;
+	}
+
+	public void showConversationsOverview() {
+		if (mContentView instanceof SlidingPaneLayout) {
+			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
+			mSlidingPaneLayout.openPane();
+		}
+	}
+
+	@Override
+	protected String getShareableUri() {
+		Conversation conversation = getSelectedConversation();
+		if (conversation != null) {
+			return conversation.getAccount().getShareableUri();
+		} else {
+			return "";
+		}
+	}
+
+	public void hideConversationsOverview() {
+		if (mContentView instanceof SlidingPaneLayout) {
+			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
+			mSlidingPaneLayout.closePane();
+		}
+	}
+
+	public boolean isConversationsOverviewHideable() {
+		if (mContentView instanceof SlidingPaneLayout) {
+			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
+			return mSlidingPaneLayout.isSlideable();
+		} else {
+			return false;
+		}
+	}
+
+	public boolean isConversationsOverviewVisable() {
+		if (mContentView instanceof SlidingPaneLayout) {
+			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
+			return mSlidingPaneLayout.isOpen();
+		} else {
+			return true;
+		}
+	}
+
+	@Override
+	protected void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		if (savedInstanceState != null) {
+            mOpenConverstaion = savedInstanceState.getString(STATE_OPEN_CONVERSATION, null);
+            mPanelOpen = savedInstanceState.getBoolean(STATE_PANEL_OPEN, true);
+            String pending = savedInstanceState.getString(STATE_PENDING_URI, null);
+            if (pending != null) {
+                mPendingImageUri = Uri.parse(pending);
+            }
+		}
+
+		setContentView(R.layout.fragment_conversations_overview);
+
+		this.mConversationFragment = new ConversationFragment();
+		FragmentTransaction transaction = getFragmentManager().beginTransaction();
+		transaction.replace(R.id.selected_conversation, this.mConversationFragment, "conversation");
+		transaction.commit();
+
+		listView = (ListView) findViewById(R.id.list);
+		this.listAdapter = new ConversationAdapter(this, conversationList);
+		listView.setAdapter(this.listAdapter);
+
+		if (getActionBar() != null) {
+			getActionBar().setDisplayHomeAsUpEnabled(false);
+			getActionBar().setHomeButtonEnabled(false);
+		}
+
+		listView.setOnItemClickListener(new OnItemClickListener() {
+
+			@Override
+			public void onItemClick(AdapterView<?> arg0, View clickedView,
+					int position, long arg3) {
+				if (getSelectedConversation() != conversationList.get(position)) {
+					setSelectedConversation(conversationList.get(position));
+					ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
+				}
+				hideConversationsOverview();
+				openConversation();
+			}
+		});
+		mContentView = findViewById(R.id.content_view_spl);
+		if (mContentView == null) {
+			mContentView = findViewById(R.id.content_view_ll);
+		}
+		if (mContentView instanceof SlidingPaneLayout) {
+			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
+			mSlidingPaneLayout.setParallaxDistance(150);
+			mSlidingPaneLayout
+				.setShadowResource(R.drawable.es_slidingpane_shadow);
+			mSlidingPaneLayout.setSliderFadeColor(0);
+			mSlidingPaneLayout.setPanelSlideListener(new PanelSlideListener() {
+
+				@Override
+				public void onPanelOpened(View arg0) {
+					updateActionBarTitle();
+					invalidateOptionsMenu();
+					hideKeyboard();
+					if (xmppConnectionServiceBound) {
+						xmppConnectionService.getNotificationService()
+							.setOpenConversation(null);
+					}
+					closeContextMenu();
+				}
+
+				@Override
+				public void onPanelClosed(View arg0) {
+					openConversation();
+				}
+
+				@Override
+				public void onPanelSlide(View arg0, float arg1) {
+					// TODO Auto-generated method stub
+
+				}
+			});
+		}
+	}
+
+	@Override
+	public void switchToConversation(Conversation conversation) {
+		setSelectedConversation(conversation);
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
+				openConversation();
+			}
+		});
+	}
+
+	private void updateActionBarTitle() {
+		updateActionBarTitle(isConversationsOverviewHideable() && !isConversationsOverviewVisable());
+	}
+
+	private void updateActionBarTitle(boolean titleShouldBeName) {
+		final ActionBar ab = getActionBar();
+		final Conversation conversation = getSelectedConversation();
+		if (ab != null) {
+			if (titleShouldBeName && conversation != null) {
+				ab.setDisplayHomeAsUpEnabled(true);
+				ab.setHomeButtonEnabled(true);
+				if (conversation.getMode() == Conversation.MODE_SINGLE || useSubjectToIdentifyConference()) {
+					ab.setTitle(conversation.getName());
+				} else {
+					ab.setTitle(conversation.getJid().toBareJid().toString());
+				}
+			} else {
+				ab.setDisplayHomeAsUpEnabled(false);
+				ab.setHomeButtonEnabled(false);
+				ab.setTitle(R.string.app_name);
+			}
+		}
+	}
+
+	private void openConversation() {
+		this.updateActionBarTitle();
+		this.invalidateOptionsMenu();
+		if (xmppConnectionServiceBound) {
+			final Conversation conversation = getSelectedConversation();
+			xmppConnectionService.getNotificationService().setOpenConversation(conversation);
+			sendReadMarkerIfNecessary(conversation);
+		}
+		listAdapter.notifyDataSetChanged();
+	}
+
+	public void sendReadMarkerIfNecessary(final Conversation conversation) {
+		if (!mActivityPaused && conversation != null) {
+			if (!conversation.isRead()) {
+				xmppConnectionService.sendReadMarker(conversation);
+			} else {
+				xmppConnectionService.markRead(conversation);
+			}
+		}
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		getMenuInflater().inflate(R.menu.conversations, menu);
+		final MenuItem menuSecure = menu.findItem(R.id.action_security);
+		final MenuItem menuArchive = menu.findItem(R.id.action_archive);
+		final MenuItem menuMucDetails = menu.findItem(R.id.action_muc_details);
+		final MenuItem menuContactDetails = menu.findItem(R.id.action_contact_details);
+		final MenuItem menuAttach = menu.findItem(R.id.action_attach_file);
+		final MenuItem menuClearHistory = menu.findItem(R.id.action_clear_history);
+		final MenuItem menuAdd = menu.findItem(R.id.action_add);
+		final MenuItem menuInviteContact = menu.findItem(R.id.action_invite);
+		final MenuItem menuMute = menu.findItem(R.id.action_mute);
+		final MenuItem menuUnmute = menu.findItem(R.id.action_unmute);
+
+		if (isConversationsOverviewVisable() && isConversationsOverviewHideable()) {
+			menuArchive.setVisible(false);
+			menuMucDetails.setVisible(false);
+			menuContactDetails.setVisible(false);
+			menuSecure.setVisible(false);
+			menuInviteContact.setVisible(false);
+			menuAttach.setVisible(false);
+			menuClearHistory.setVisible(false);
+			menuMute.setVisible(false);
+			menuUnmute.setVisible(false);
+		} else {
+			menuAdd.setVisible(!isConversationsOverviewHideable());
+			if (this.getSelectedConversation() != null) {
+				if (this.getSelectedConversation().getLatestMessage()
+						.getEncryption() != Message.ENCRYPTION_NONE) {
+					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+						menuSecure.setIcon(R.drawable.ic_lock_outline_white_48dp);
+					} else {
+						menuSecure.setIcon(R.drawable.ic_action_secure);
+					}
+				}
+				if (this.getSelectedConversation().getMode() == Conversation.MODE_MULTI) {
+					menuContactDetails.setVisible(false);
+					menuAttach.setVisible(false);
+					menuInviteContact.setVisible(getSelectedConversation().getMucOptions().canInvite());
+				} else {
+					menuMucDetails.setVisible(false);
+				}
+				if (this.getSelectedConversation().isMuted()) {
+					menuMute.setVisible(false);
+				} else {
+					menuUnmute.setVisible(false);
+				}
+			}
+		}
+		return true;
+	}
+
+	private void selectPresenceToAttachFile(final int attachmentChoice, final int encryption) {
+		if (attachmentChoice == ATTACHMENT_CHOICE_LOCATION && encryption != Message.ENCRYPTION_OTR) {
+			getSelectedConversation().setNextCounterpart(null);
+			Intent intent = new Intent("eu.siacs.conversations.location.request");
+			startActivityForResult(intent,attachmentChoice);
+		} else {
+			selectPresence(getSelectedConversation(), new OnPresenceSelected() {
+
+				@Override
+				public void onPresenceSelected() {
+					Intent intent = new Intent();
+					boolean chooser = false;
+					switch (attachmentChoice) {
+						case ATTACHMENT_CHOICE_CHOOSE_IMAGE:
+							intent.setAction(Intent.ACTION_GET_CONTENT);
+							intent.setType("image/*");
+							chooser = true;
+							break;
+						case ATTACHMENT_CHOICE_TAKE_PHOTO:
+							mPendingImageUri = xmppConnectionService.getFileBackend().getTakePhotoUri();
+							intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
+							intent.putExtra(MediaStore.EXTRA_OUTPUT, mPendingImageUri);
+							break;
+						case ATTACHMENT_CHOICE_CHOOSE_FILE:
+							chooser = true;
+							intent.setType("*/*");
+							intent.addCategory(Intent.CATEGORY_OPENABLE);
+							intent.setAction(Intent.ACTION_GET_CONTENT);
+							break;
+						case ATTACHMENT_CHOICE_RECORD_VOICE:
+							intent.setAction(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
+							break;
+						case ATTACHMENT_CHOICE_LOCATION:
+							intent.setAction("eu.siacs.conversations.location.request");
+							break;
+					}
+					if (intent.resolveActivity(getPackageManager()) != null) {
+						if (chooser) {
+							startActivityForResult(
+									Intent.createChooser(intent, getString(R.string.perform_action_with)),
+									attachmentChoice);
+						} else {
+							startActivityForResult(intent, attachmentChoice);
+						}
+					}
+				}
+			});
+		}
+	}
+
+	private void attachFile(final int attachmentChoice) {
+		final Conversation conversation = getSelectedConversation();
+		final int encryption = conversation.getNextEncryption(forceEncryption());
+		if (encryption == Message.ENCRYPTION_PGP) {
+			if (hasPgp()) {
+				if (conversation.getContact().getPgpKeyId() != 0) {
+					xmppConnectionService.getPgpEngine().hasKey(
+							conversation.getContact(),
+							new UiCallback<Contact>() {
+
+								@Override
+								public void userInputRequried(PendingIntent pi,
+										Contact contact) {
+									ConversationActivity.this.runIntent(pi,attachmentChoice);
+								}
+
+								@Override
+								public void success(Contact contact) {
+									selectPresenceToAttachFile(attachmentChoice,encryption);
+								}
+
+								@Override
+								public void error(int error, Contact contact) {
+									displayErrorDialog(error);
+								}
+							});
+				} else {
+					final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
+						.findFragmentByTag("conversation");
+					if (fragment != null) {
+						fragment.showNoPGPKeyDialog(false,
+								new OnClickListener() {
+
+									@Override
+									public void onClick(DialogInterface dialog,
+											int which) {
+										conversation
+											.setNextEncryption(Message.ENCRYPTION_NONE);
+										xmppConnectionService.databaseBackend
+											.updateConversation(conversation);
+										selectPresenceToAttachFile(attachmentChoice,Message.ENCRYPTION_NONE);
+									}
+								});
+					}
+				}
+			} else {
+				showInstallPgpDialog();
+			}
+		} else {
+			selectPresenceToAttachFile(attachmentChoice,encryption);
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		if (item.getItemId() == android.R.id.home) {
+			showConversationsOverview();
+			return true;
+		} else if (item.getItemId() == R.id.action_add) {
+			startActivity(new Intent(this, StartConversationActivity.class));
+			return true;
+		} else if (getSelectedConversation() != null) {
+			switch (item.getItemId()) {
+				case R.id.action_attach_file:
+					attachFileDialog();
+					break;
+				case R.id.action_archive:
+					this.endConversation(getSelectedConversation());
+					break;
+				case R.id.action_contact_details:
+					switchToContactDetails(getSelectedConversation().getContact());
+					break;
+				case R.id.action_muc_details:
+					Intent intent = new Intent(this,
+							ConferenceDetailsActivity.class);
+					intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
+					intent.putExtra("uuid", getSelectedConversation().getUuid());
+					startActivity(intent);
+					break;
+				case R.id.action_invite:
+					inviteToConversation(getSelectedConversation());
+					break;
+				case R.id.action_security:
+					selectEncryptionDialog(getSelectedConversation());
+					break;
+				case R.id.action_clear_history:
+					clearHistoryDialog(getSelectedConversation());
+					break;
+				case R.id.action_mute:
+					muteConversationDialog(getSelectedConversation());
+					break;
+				case R.id.action_unmute:
+					unmuteConversation(getSelectedConversation());
+					break;
+				case R.id.action_block:
+					BlockContactDialog.show(this, xmppConnectionService, getSelectedConversation());
+					break;
+				case R.id.action_unblock:
+					BlockContactDialog.show(this, xmppConnectionService, getSelectedConversation());
+					break;
+				default:
+					break;
+			}
+			return super.onOptionsItemSelected(item);
+		} else {
+			return super.onOptionsItemSelected(item);
+		}
+	}
+
+	public void endConversation(Conversation conversation) {
+		showConversationsOverview();
+		xmppConnectionService.archiveConversation(conversation);
+		if (conversationList.size() > 0) {
+			setSelectedConversation(conversationList.get(0));
+			this.mConversationFragment.reInit(getSelectedConversation());
+		} else {
+			setSelectedConversation(null);
+		}
+	}
+
+	@SuppressLint("InflateParams")
+	protected void clearHistoryDialog(final Conversation conversation) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(getString(R.string.clear_conversation_history));
+		View dialogView = getLayoutInflater().inflate(
+				R.layout.dialog_clear_history, null);
+		final CheckBox endConversationCheckBox = (CheckBox) dialogView
+			.findViewById(R.id.end_conversation_checkbox);
+		builder.setView(dialogView);
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton(getString(R.string.delete_messages),
+				new OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						ConversationActivity.this.xmppConnectionService.clearConversationHistory(conversation);
+						if (endConversationCheckBox.isChecked()) {
+							endConversation(conversation);
+						} else {
+							updateConversationList();
+							ConversationActivity.this.mConversationFragment.updateMessages();
+						}
+					}
+				});
+		builder.create().show();
+	}
+
+	protected void attachFileDialog() {
+		View menuAttachFile = findViewById(R.id.action_attach_file);
+		if (menuAttachFile == null) {
+			return;
+		}
+		PopupMenu attachFilePopup = new PopupMenu(this, menuAttachFile);
+		attachFilePopup.inflate(R.menu.attachment_choices);
+		if (new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION).resolveActivity(getPackageManager()) == null) {
+			attachFilePopup.getMenu().findItem(R.id.attach_record_voice).setVisible(false);
+		}
+		if (new Intent("eu.siacs.conversations.location.request").resolveActivity(getPackageManager()) == null) {
+			attachFilePopup.getMenu().findItem(R.id.attach_location).setVisible(false);
+		}
+		attachFilePopup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
+
+			@Override
+			public boolean onMenuItemClick(MenuItem item) {
+				switch (item.getItemId()) {
+					case R.id.attach_choose_picture:
+						attachFile(ATTACHMENT_CHOICE_CHOOSE_IMAGE);
+						break;
+					case R.id.attach_take_picture:
+						attachFile(ATTACHMENT_CHOICE_TAKE_PHOTO);
+						break;
+					case R.id.attach_choose_file:
+						attachFile(ATTACHMENT_CHOICE_CHOOSE_FILE);
+						break;
+					case R.id.attach_record_voice:
+						attachFile(ATTACHMENT_CHOICE_RECORD_VOICE);
+						break;
+					case R.id.attach_location:
+						attachFile(ATTACHMENT_CHOICE_LOCATION);
+						break;
+				}
+				return false;
+			}
+		});
+		attachFilePopup.show();
+	}
+
+	public void verifyOtrSessionDialog(final Conversation conversation, View view) {
+		if (!conversation.hasValidOtrSession() || conversation.getOtrSession().getSessionStatus() != SessionStatus.ENCRYPTED) {
+			Toast.makeText(this, R.string.otr_session_not_started, Toast.LENGTH_LONG).show();
+			return;
+		}
+		if (view == null) {
+			return;
+		}
+		PopupMenu popup = new PopupMenu(this, view);
+		popup.inflate(R.menu.verification_choices);
+		popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
+			@Override
+			public boolean onMenuItemClick(MenuItem menuItem) {
+				Intent intent = new Intent(ConversationActivity.this, VerifyOTRActivity.class);
+				intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
+				intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
+				intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
+				switch (menuItem.getItemId()) {
+					case R.id.scan_fingerprint:
+						intent.putExtra("mode",VerifyOTRActivity.MODE_SCAN_FINGERPRINT);
+						break;
+					case R.id.ask_question:
+						intent.putExtra("mode",VerifyOTRActivity.MODE_ASK_QUESTION);
+						break;
+					case R.id.manual_verification:
+						intent.putExtra("mode",VerifyOTRActivity.MODE_MANUAL_VERIFICATION);
+						break;
+				}
+				startActivity(intent);
+				return true;
+			}
+		});
+		popup.show();
+	}
+
+	protected void selectEncryptionDialog(final Conversation conversation) {
+		View menuItemView = findViewById(R.id.action_security);
+		if (menuItemView == null) {
+			return;
+		}
+		PopupMenu popup = new PopupMenu(this, menuItemView);
+		final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
+			.findFragmentByTag("conversation");
+		if (fragment != null) {
+			popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
+
+				@Override
+				public boolean onMenuItemClick(MenuItem item) {
+					switch (item.getItemId()) {
+						case R.id.encryption_choice_none:
+							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
+							item.setChecked(true);
+							break;
+						case R.id.encryption_choice_otr:
+							conversation.setNextEncryption(Message.ENCRYPTION_OTR);
+							item.setChecked(true);
+							break;
+						case R.id.encryption_choice_pgp:
+							if (hasPgp()) {
+								if (conversation.getAccount().getKeys()
+										.has("pgp_signature")) {
+									conversation
+										.setNextEncryption(Message.ENCRYPTION_PGP);
+									item.setChecked(true);
+								} else {
+									announcePgp(conversation.getAccount(),
+											conversation);
+								}
+							} else {
+								showInstallPgpDialog();
+							}
+							break;
+						default:
+							conversation.setNextEncryption(Message.ENCRYPTION_NONE);
+							break;
+					}
+					xmppConnectionService.databaseBackend
+						.updateConversation(conversation);
+					fragment.updateChatMsgHint();
+					return true;
+				}
+			});
+			popup.inflate(R.menu.encryption_choices);
+			MenuItem otr = popup.getMenu().findItem(R.id.encryption_choice_otr);
+			MenuItem none = popup.getMenu().findItem(
+					R.id.encryption_choice_none);
+			if (conversation.getMode() == Conversation.MODE_MULTI) {
+				otr.setEnabled(false);
+			} else {
+				if (forceEncryption()) {
+					none.setVisible(false);
+				}
+			}
+			switch (conversation.getNextEncryption(forceEncryption())) {
+				case Message.ENCRYPTION_NONE:
+					none.setChecked(true);
+					break;
+				case Message.ENCRYPTION_OTR:
+					otr.setChecked(true);
+					break;
+				case Message.ENCRYPTION_PGP:
+					popup.getMenu().findItem(R.id.encryption_choice_pgp)
+						.setChecked(true);
+					break;
+				default:
+					popup.getMenu().findItem(R.id.encryption_choice_none)
+						.setChecked(true);
+					break;
+			}
+			popup.show();
+		}
+	}
+
+	protected void muteConversationDialog(final Conversation conversation) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.disable_notifications);
+		final int[] durations = getResources().getIntArray(
+				R.array.mute_options_durations);
+		builder.setItems(R.array.mute_options_descriptions,
+				new OnClickListener() {
+
+					@Override
+					public void onClick(final DialogInterface dialog, final int which) {
+						final long till;
+						if (durations[which] == -1) {
+							till = Long.MAX_VALUE;
+						} else {
+							till = System.currentTimeMillis() + (durations[which] * 1000);
+						}
+						conversation.setMutedTill(till);
+						ConversationActivity.this.xmppConnectionService.databaseBackend
+							.updateConversation(conversation);
+						updateConversationList();
+						ConversationActivity.this.mConversationFragment.updateMessages();
+						invalidateOptionsMenu();
+					}
+				});
+		builder.create().show();
+	}
+
+	public void unmuteConversation(final Conversation conversation) {
+		conversation.setMutedTill(0);
+		this.xmppConnectionService.databaseBackend.updateConversation(conversation);
+		updateConversationList();
+		ConversationActivity.this.mConversationFragment.updateMessages();
+		invalidateOptionsMenu();
+	}
+
+	@Override
+	public void onBackPressed() {
+		if (!isConversationsOverviewVisable()) {
+			showConversationsOverview();
+		} else {
+			moveTaskToBack(true);
+		}
+	}
+
+	@Override
+	protected void onNewIntent(final Intent intent) {
+		if (xmppConnectionServiceBound) {
+			if (intent != null && VIEW_CONVERSATION.equals(intent.getType())) {
+				handleViewConversationIntent(intent);
+			}
+		} else {
+			setIntent(intent);
+		}
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		this.mRedirected = false;
+		if (this.xmppConnectionServiceBound) {
+			this.onBackendConnected();
+		}
+		if (conversationList.size() >= 1) {
+			this.onConversationUpdate();
+		}
+	}
+
+	@Override
+	public void onPause() {
+		super.onPause();
+		this.mActivityPaused = true;
+		if (this.xmppConnectionServiceBound) {
+			this.xmppConnectionService.getNotificationService().setIsInForeground(false);
+		}
+	}
+
+	@Override
+	public void onResume() {
+		super.onResume();
+		final int theme = findTheme();
+		final boolean usingEnterKey = usingEnterKey();
+		if (this.mTheme != theme || usingEnterKey != mUsingEnterKey) {
+			recreate();
+		}
+		this.mActivityPaused = false;
+		if (this.xmppConnectionServiceBound) {
+			this.xmppConnectionService.getNotificationService().setIsInForeground(true);
+		}
+
+		if (!isConversationsOverviewVisable() || !isConversationsOverviewHideable()) {
+			sendReadMarkerIfNecessary(getSelectedConversation());
+		}
+
+	}
+
+	@Override
+	public void onSaveInstanceState(final Bundle savedInstanceState) {
+		Conversation conversation = getSelectedConversation();
+		if (conversation != null) {
+			savedInstanceState.putString(STATE_OPEN_CONVERSATION,
+					conversation.getUuid());
+		}
+		savedInstanceState.putBoolean(STATE_PANEL_OPEN,
+				isConversationsOverviewVisable());
+		if (this.mPendingImageUri != null) {
+			savedInstanceState.putString(STATE_PENDING_URI, this.mPendingImageUri.toString());
+		}
+		super.onSaveInstanceState(savedInstanceState);
+	}
+
+	@Override
+	void onBackendConnected() {
+		this.xmppConnectionService.getNotificationService().setIsInForeground(true);
+		updateConversationList();
+		if (xmppConnectionService.getAccounts().size() == 0) {
+			if (!mRedirected) {
+				this.mRedirected = true;
+				startActivity(new Intent(this, EditAccountActivity.class));
+				finish();
+			}
+		} else if (conversationList.size() <= 0) {
+			if (!mRedirected) {
+				this.mRedirected = true;
+				Intent intent = new Intent(this, StartConversationActivity.class);
+				intent.putExtra("init",true);
+				startActivity(intent);
+				finish();
+			}
+		} else if (getIntent() != null && VIEW_CONVERSATION.equals(getIntent().getType())) {
+			handleViewConversationIntent(getIntent());
+		} else if (selectConversationByUuid(mOpenConverstaion)) {
+			if (mPanelOpen) {
+				showConversationsOverview();
+			} else {
+				if (isConversationsOverviewHideable()) {
+					openConversation();
+				}
+			}
+			this.mConversationFragment.reInit(getSelectedConversation());
+			mOpenConverstaion = null;
+		} else if (getSelectedConversation() != null) {
+			this.mConversationFragment.reInit(getSelectedConversation());
+		} else {
+			showConversationsOverview();
+			mPendingImageUri = null;
+			mPendingFileUri = null;
+			mPendingGeoUri = null;
+			setSelectedConversation(conversationList.get(0));
+			this.mConversationFragment.reInit(getSelectedConversation());
+		}
+
+		if (mPendingImageUri != null) {
+			attachImageToConversation(getSelectedConversation(),mPendingImageUri);
+			mPendingImageUri = null;
+		} else if (mPendingFileUri != null) {
+			attachFileToConversation(getSelectedConversation(),mPendingFileUri);
+			mPendingFileUri = null;
+		} else if (mPendingGeoUri != null) {
+			attachLocationToConversation(getSelectedConversation(),mPendingGeoUri);
+			mPendingGeoUri = null;
+		}
+		ExceptionHelper.checkForCrash(this, this.xmppConnectionService);
+		setIntent(new Intent());
+	}
+
+	private void handleViewConversationIntent(final Intent intent) {
+		final String uuid = (String) intent.getExtras().get(CONVERSATION);
+		final String downloadUuid = (String) intent.getExtras().get(MESSAGE);
+		final String text = intent.getExtras().getString(TEXT, "");
+		final String nick = intent.getExtras().getString(NICK, null);
+		if (selectConversationByUuid(uuid)) {
+			this.mConversationFragment.reInit(getSelectedConversation());
+			if (nick != null) {
+				this.mConversationFragment.highlightInConference(nick);
+			} else {
+				this.mConversationFragment.appendText(text);
+			}
+			hideConversationsOverview();
+			openConversation();
+			if (mContentView instanceof SlidingPaneLayout) {
+				updateActionBarTitle(true); //fixes bug where slp isn't properly closed yet
+			}
+			if (downloadUuid != null) {
+				final Message message = mSelectedConversation.findMessageWithFileAndUuid(downloadUuid);
+				if (message != null) {
+					mConversationFragment.messageListAdapter.startDownloadable(message);
+				}
+			}
+		}
+	}
+
+	private boolean selectConversationByUuid(String uuid) {
+		if (uuid == null) {
+			return false;
+		}
+		for (Conversation aConversationList : conversationList) {
+			if (aConversationList.getUuid().equals(uuid)) {
+				setSelectedConversation(aConversationList);
+				return true;
+			}
+		}
+		return false;
+	}
+
+	@Override
+	protected void unregisterListeners() {
+		super.unregisterListeners();
+		xmppConnectionService.getNotificationService().setOpenConversation(null);
+	}
+
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode,
+			final Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (resultCode == RESULT_OK) {
+			if (requestCode == REQUEST_DECRYPT_PGP) {
+				mConversationFragment.hideSnackbar();
+				mConversationFragment.updateMessages();
+			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
+				mPendingImageUri = data.getData();
+				if (xmppConnectionServiceBound) {
+					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
+					mPendingImageUri = null;
+				}
+			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_FILE || requestCode == ATTACHMENT_CHOICE_RECORD_VOICE) {
+				mPendingFileUri = data.getData();
+				if (xmppConnectionServiceBound) {
+					attachFileToConversation(getSelectedConversation(),mPendingFileUri);
+					mPendingFileUri = null;
+				}
+			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO && mPendingImageUri != null) {
+				if (xmppConnectionServiceBound) {
+					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
+					mPendingImageUri = null;
+				}
+				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+				intent.setData(mPendingImageUri);
+				sendBroadcast(intent);
+			} else if (requestCode == ATTACHMENT_CHOICE_LOCATION) {
+				double latitude = data.getDoubleExtra("latitude",0);
+				double longitude = data.getDoubleExtra("longitude",0);
+				this.mPendingGeoUri = Uri.parse("geo:"+String.valueOf(latitude)+","+String.valueOf(longitude));
+				if (xmppConnectionServiceBound) {
+					attachLocationToConversation(getSelectedConversation(), mPendingGeoUri);
+					this.mPendingGeoUri = null;
+				}
+			}
+		} else {
+			if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
+				mPendingImageUri = null;
+			}
+		}
+	}
+
+	private void attachLocationToConversation(Conversation conversation, Uri uri) {
+		xmppConnectionService.attachLocationToConversation(conversation,uri, new UiCallback<Message>() {
+
+			@Override
+			public void success(Message message) {
+				xmppConnectionService.sendMessage(message);
+			}
+
+			@Override
+			public void error(int errorCode, Message object) {
+
+			}
+
+			@Override
+			public void userInputRequried(PendingIntent pi, Message object) {
+
+			}
+		});
+	}
+
+	private void attachFileToConversation(Conversation conversation, Uri uri) {
+		prepareFileToast = Toast.makeText(getApplicationContext(),
+				getText(R.string.preparing_file), Toast.LENGTH_LONG);
+		prepareFileToast.show();
+		xmppConnectionService.attachFileToConversation(conversation,uri, new UiCallback<Message>() {
+			@Override
+			public void success(Message message) {
+				hidePrepareFileToast();
+				xmppConnectionService.sendMessage(message);
+			}
+
+			@Override
+			public void error(int errorCode, Message message) {
+				displayErrorDialog(errorCode);
+			}
+
+			@Override
+			public void userInputRequried(PendingIntent pi, Message message) {
+
+			}
+		});
+	}
+
+	private void attachImageToConversation(Conversation conversation, Uri uri) {
+		prepareFileToast = Toast.makeText(getApplicationContext(),
+				getText(R.string.preparing_image), Toast.LENGTH_LONG);
+		prepareFileToast.show();
+		xmppConnectionService.attachImageToConversation(conversation, uri,
+				new UiCallback<Message>() {
+
+					@Override
+					public void userInputRequried(PendingIntent pi,
+							Message object) {
+						hidePrepareFileToast();
+					}
+
+					@Override
+					public void success(Message message) {
+						xmppConnectionService.sendMessage(message);
+					}
+
+					@Override
+					public void error(int error, Message message) {
+						hidePrepareFileToast();
+						displayErrorDialog(error);
+					}
+				});
+	}
+
+	private void hidePrepareFileToast() {
+		if (prepareFileToast != null) {
+			runOnUiThread(new Runnable() {
+
+				@Override
+				public void run() {
+					prepareFileToast.cancel();
+				}
+			});
+		}
+	}
+
+	public void updateConversationList() {
+		xmppConnectionService
+			.populateWithOrderedConversations(conversationList);
+		listAdapter.notifyDataSetChanged();
+	}
+
+	public void runIntent(PendingIntent pi, int requestCode) {
+		try {
+			this.startIntentSenderForResult(pi.getIntentSender(), requestCode,
+					null, 0, 0, 0);
+		} catch (final SendIntentException ignored) {
+		}
+	}
+
+	public void encryptTextMessage(Message message) {
+		xmppConnectionService.getPgpEngine().encrypt(message,
+				new UiCallback<Message>() {
+
+					@Override
+					public void userInputRequried(PendingIntent pi,
+							Message message) {
+						ConversationActivity.this.runIntent(pi,
+								ConversationActivity.REQUEST_SEND_MESSAGE);
+					}
+
+					@Override
+					public void success(Message message) {
+						message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+						xmppConnectionService.sendMessage(message);
+					}
+
+					@Override
+					public void error(int error, Message message) {
+
+					}
+				});
+	}
+
+	public boolean forceEncryption() {
+		return getPreferences().getBoolean("force_encryption", false);
+	}
+
+	public boolean indicateReceived() {
+		return getPreferences().getBoolean("indicate_received", false);
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		updateConversationList();
+		if (xmppConnectionService != null && xmppConnectionService.getAccounts().size() == 0) {
+			if (!mRedirected) {
+				this.mRedirected = true;
+				startActivity(new Intent(this, EditAccountActivity.class));
+				finish();
+			}
+		} else if (conversationList.size() == 0) {
+			if (!mRedirected) {
+				this.mRedirected = true;
+				Intent intent = new Intent(this, StartConversationActivity.class);
+				intent.putExtra("init",true);
+				startActivity(intent);
+				finish();
+			}
+		} else {
+			ConversationActivity.this.mConversationFragment.updateMessages();
+			updateActionBarTitle();
+		}
+	}
+
+	@Override
+	public void onAccountUpdate() {
+		this.refreshUi();
+	}
+
+	@Override
+	public void onConversationUpdate() {
+		this.refreshUi();
+	}
+
+	@Override
+	public void onRosterUpdate() {
+		this.refreshUi();
+	}
+
+	@Override
+	public void OnUpdateBlocklist(Status status) {
+		this.refreshUi();
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				invalidateOptionsMenu();
+			}
+		});
+	}
+
+	public void unblockConversation(final Blockable conversation) {
+		xmppConnectionService.sendUnblockRequest(conversation);
+	}
+
+	public boolean enterIsSend() {
+		return getPreferences().getBoolean("enter_is_send",false);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
new file mode 100644
index 00000000..ea62a288
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
@@ -0,0 +1,1185 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.AlertDialog;
+import android.app.Fragment;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentSender;
+import android.content.IntentSender.SendIntentException;
+import android.os.Bundle;
+import android.text.InputType;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.Gravity;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AbsListView;
+import android.widget.AbsListView.OnScrollListener;
+import android.widget.AdapterView;
+import android.widget.AdapterView.AdapterContextMenuInfo;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.ListView;
+import android.widget.PopupWindow;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+import android.widget.Toast;
+
+import net.java.otr4j.session.SessionStatus;
+
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.crypto.PgpEngine;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.DownloadablePlaceholder;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.ui.XmppActivity.OnPresenceSelected;
+import de.thedevstack.conversationsplus.ui.XmppActivity.OnValueEdited;
+import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter;
+import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureClicked;
+import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
+import de.thedevstack.conversationsplus.utils.GeoHelper;
+import de.thedevstack.conversationsplus.xmpp.chatstate.ChatState;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import github.ankushsachdeva.emojicon.EmojiconGridView;
+import github.ankushsachdeva.emojicon.EmojiconsPopup;
+import github.ankushsachdeva.emojicon.emoji.Emojicon;
+
+public class ConversationFragment extends Fragment implements EditMessage.KeyboardListener {
+
+	protected Conversation conversation;
+	private OnClickListener leaveMuc = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			activity.endConversation(conversation);
+		}
+	};
+	private OnClickListener joinMuc = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			activity.xmppConnectionService.joinMuc(conversation);
+		}
+	};
+	private OnClickListener enterPassword = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			MucOptions muc = conversation.getMucOptions();
+			String password = muc.getPassword();
+			if (password == null) {
+				password = "";
+			}
+			activity.quickPasswordEdit(password, new OnValueEdited() {
+
+				@Override
+				public void onValueEdited(String value) {
+					activity.xmppConnectionService.providePasswordForMuc(
+							conversation, value);
+				}
+			});
+		}
+	};
+	protected ListView messagesView;
+	final protected List<Message> messageList = new ArrayList<>();
+	protected MessageAdapter messageListAdapter;
+	private EditMessage mEditMessage;
+	private ImageButton mSendButton;
+    private ImageView mEmojButton;
+    private View mRootView;
+    private EmojiconsPopup mEmojPopup;
+	private RelativeLayout snackbar;
+	private TextView snackbarMessage;
+	private TextView snackbarAction;
+	private boolean messagesLoaded = true;
+	private Toast messageLoaderToast;
+
+	private OnScrollListener mOnScrollListener = new OnScrollListener() {
+
+		@Override
+		public void onScrollStateChanged(AbsListView view, int scrollState) {
+			// TODO Auto-generated method stub
+
+		}
+
+		@Override
+		public void onScroll(AbsListView view, int firstVisibleItem,
+				int visibleItemCount, int totalItemCount) {
+			synchronized (ConversationFragment.this.messageList) {
+				if (firstVisibleItem < 5 && messagesLoaded && messageList.size() > 0) {
+					long timestamp = ConversationFragment.this.messageList.get(0).getTimeSent();
+					messagesLoaded = false;
+					activity.xmppConnectionService.loadMoreMessages(conversation, timestamp, new XmppConnectionService.OnMoreMessagesLoaded() {
+						@Override
+						public void onMoreMessagesLoaded(final int count, Conversation conversation) {
+							if (ConversationFragment.this.conversation != conversation) {
+								return;
+							}
+							activity.runOnUiThread(new Runnable() {
+								@Override
+								public void run() {
+									final int oldPosition = messagesView.getFirstVisiblePosition();
+									View v = messagesView.getChildAt(0);
+									final int pxOffset = (v == null) ? 0 : v.getTop();
+									ConversationFragment.this.conversation.populateWithMessages(ConversationFragment.this.messageList);
+									updateStatusMessages();
+									messageListAdapter.notifyDataSetChanged();
+									if (count != 0) {
+										final int newPosition = oldPosition + count;
+										int offset = 0;
+										try {
+											Message tmpMessage = messageList.get(newPosition);
+
+											while(tmpMessage.wasMergedIntoPrevious()) {
+												offset++;
+												tmpMessage = tmpMessage.prev();
+											}
+										} catch (final IndexOutOfBoundsException ignored) {
+
+										}
+										messagesView.setSelectionFromTop(newPosition - offset, pxOffset);
+										messagesLoaded = true;
+										if (messageLoaderToast != null) {
+											messageLoaderToast.cancel();
+										}
+									}
+								}
+							});
+						}
+
+						@Override
+						public void informUser(final int resId) {
+
+							activity.runOnUiThread(new Runnable() {
+								@Override
+								public void run() {
+									if (messageLoaderToast != null) {
+										messageLoaderToast.cancel();
+									}
+									if (ConversationFragment.this.conversation != conversation) {
+										return;
+									}
+									messageLoaderToast = Toast.makeText(activity,resId,Toast.LENGTH_LONG);
+									messageLoaderToast.show();
+								}
+							});
+
+						}
+					});
+
+				}
+			}
+		}
+	};
+	private IntentSender askForPassphraseIntent = null;
+	protected OnClickListener clickToDecryptListener = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			if (activity.hasPgp() && askForPassphraseIntent != null) {
+				try {
+					getActivity().startIntentSenderForResult(
+							askForPassphraseIntent,
+							ConversationActivity.REQUEST_DECRYPT_PGP, null, 0,
+							0, 0);
+					askForPassphraseIntent = null;
+				} catch (SendIntentException e) {
+					//
+				}
+			}
+		}
+	};
+	protected OnClickListener clickToVerify = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			activity.verifyOtrSessionDialog(conversation,v);
+		}
+	};
+	private ConcurrentLinkedQueue<Message> mEncryptedMessages = new ConcurrentLinkedQueue<>();
+	private boolean mDecryptJobRunning = false;
+	private OnEditorActionListener mEditorActionListener = new OnEditorActionListener() {
+
+		@Override
+		public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+			if (actionId == EditorInfo.IME_ACTION_SEND) {
+				InputMethodManager imm = (InputMethodManager) v.getContext()
+					.getSystemService(Context.INPUT_METHOD_SERVICE);
+				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
+				sendMessage();
+				return true;
+			} else {
+				return false;
+			}
+		}
+	};
+	private OnClickListener mSendButtonListener = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			sendMessage();
+		}
+	};
+	private OnClickListener clickToMuc = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			Intent intent = new Intent(getActivity(),
+					ConferenceDetailsActivity.class);
+			intent.setAction(ConferenceDetailsActivity.ACTION_VIEW_MUC);
+			intent.putExtra("uuid", conversation.getUuid());
+			startActivity(intent);
+		}
+	};
+	private ConversationActivity activity;
+	private Message selectedMessage;
+
+	private void sendMessage() {
+		if (this.conversation == null) {
+			return;
+		}
+		if (mEditMessage.getText().length() < 1) {
+			if (this.conversation.getMode() == Conversation.MODE_MULTI) {
+				conversation.setNextCounterpart(null);
+				updateChatMsgHint();
+			}
+			return;
+		}
+		Message message = new Message(conversation, mEditMessage.getText()
+				.toString(), conversation.getNextEncryption(activity
+					.forceEncryption()));
+		if (conversation.getMode() == Conversation.MODE_MULTI) {
+			if (conversation.getNextCounterpart() != null) {
+				message.setCounterpart(conversation.getNextCounterpart());
+				message.setType(Message.TYPE_PRIVATE);
+				conversation.setNextCounterpart(null);
+			}
+		}
+		if (conversation.getNextEncryption(activity.forceEncryption()) == Message.ENCRYPTION_OTR) {
+			sendOtrMessage(message);
+		} else if (conversation.getNextEncryption(activity.forceEncryption()) == Message.ENCRYPTION_PGP) {
+			sendPgpMessage(message);
+		} else {
+			sendPlainTextMessage(message);
+		}
+	}
+
+	public void updateChatMsgHint() {
+		if (conversation.getMode() == Conversation.MODE_MULTI
+				&& conversation.getNextCounterpart() != null) {
+			this.mEditMessage.setHint(getString(
+						R.string.send_private_message_to,
+						conversation.getNextCounterpart().getResourcepart()));
+		} else {
+			switch (conversation.getNextEncryption(activity.forceEncryption())) {
+				case Message.ENCRYPTION_NONE:
+					mEditMessage
+						.setHint(getString(R.string.send_plain_text_message));
+					break;
+				case Message.ENCRYPTION_OTR:
+					mEditMessage.setHint(getString(R.string.send_otr_message));
+					break;
+				case Message.ENCRYPTION_PGP:
+					mEditMessage.setHint(getString(R.string.send_pgp_message));
+					break;
+				default:
+					break;
+			}
+			getActivity().invalidateOptionsMenu();
+		}
+	}
+
+	private void setupIme() {
+		if (((ConversationActivity)getActivity()).usingEnterKey()) {
+			mEditMessage.setInputType(mEditMessage.getInputType() & (~InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE));
+		} else {
+			mEditMessage.setInputType(mEditMessage.getInputType() | InputType.TYPE_TEXT_VARIATION_SHORT_MESSAGE);
+		}
+	}
+
+	@Override
+	public View onCreateView(final LayoutInflater inflater,
+			ViewGroup container, Bundle savedInstanceState) {
+		final View view = inflater.inflate(R.layout.fragment_conversation,
+				container, false);
+		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
+		setupIme();
+		mEditMessage.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				if (activity != null) {
+					activity.hideConversationsOverview();
+				}
+			}
+		});
+		mEditMessage.setOnEditorActionListener(mEditorActionListener);
+
+        // Start of emojicon
+        mEmojButton = (ImageView) view.findViewById(R.id.emoji_btn);
+        mRootView = view.findViewById(R.id.textsend);
+
+        // Give the topmost view of your activity layout hierarchy. This will be used to measure soft keyboard height
+        mEmojPopup = new EmojiconsPopup(mRootView, this.getActivity());
+
+        //Will automatically set size according to the soft keyboard size
+        mEmojPopup.setSizeForSoftKeyboard();
+
+        //Set on emojicon click listener
+        mEmojPopup.setOnEmojiconClickedListener(new EmojiconGridView.OnEmojiconClickedListener() {
+
+            @Override
+            public void onEmojiconClicked(Emojicon emojicon) {
+                mEditMessage.append(emojicon.getEmoji());
+            }
+        });
+
+        //Set on backspace click listener
+        mEmojPopup.setOnEmojiconBackspaceClickedListener(new EmojiconsPopup.OnEmojiconBackspaceClickedListener() {
+
+            @Override
+            public void onEmojiconBackspaceClicked(View v) {
+                KeyEvent event = new KeyEvent(
+                        0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
+                mEditMessage.dispatchKeyEvent(event);
+            }
+        });
+
+        //If the emoji popup is dismissed, change emojiButton to smiley icon
+        mEmojPopup.setOnDismissListener(new PopupWindow.OnDismissListener() {
+
+            @Override
+            public void onDismiss() {
+                changeEmojiKeyboardIcon(mEmojButton, R.drawable.smiley);
+            }
+        });
+
+        //If the text keyboard closes, also dismiss the emoji popup
+        mEmojPopup.setOnSoftKeyboardOpenCloseListener(new EmojiconsPopup.OnSoftKeyboardOpenCloseListener() {
+
+            @Override
+            public void onKeyboardOpen(int keyBoardHeight) {
+
+            }
+
+            @Override
+            public void onKeyboardClose() {
+                if (mEmojPopup.isShowing())
+                    mEmojPopup.dismiss();
+            }
+        });
+
+        //On emoji clicked, add it to edittext
+        mEmojPopup.setOnEmojiconClickedListener(new EmojiconGridView.OnEmojiconClickedListener() {
+
+            @Override
+            public void onEmojiconClicked(Emojicon emojicon) {
+                mEditMessage.append(emojicon.getEmoji());
+            }
+        });
+
+        //On backspace clicked, emulate the KEYCODE_DEL key event
+        mEmojPopup.setOnEmojiconBackspaceClickedListener(new EmojiconsPopup.OnEmojiconBackspaceClickedListener() {
+
+            @Override
+            public void onEmojiconBackspaceClicked(View v) {
+                KeyEvent event = new KeyEvent(
+                        0, 0, 0, KeyEvent.KEYCODE_DEL, 0, 0, 0, 0, KeyEvent.KEYCODE_ENDCALL);
+                mEditMessage.dispatchKeyEvent(event);
+            }
+        });
+
+        // To toggle between text keyboard and emoji keyboard keyboard(Popup)
+        mEmojButton.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+
+                //If popup is not showing => emoji keyboard is not visible, we need to show it
+                if(!mEmojPopup.isShowing()){
+
+                    //If keyboard is visible, simply show the emoji popup
+                    if(mEmojPopup.isKeyBoardOpen()){
+                        mEmojPopup.showAtBottom();
+                        changeEmojiKeyboardIcon(mEmojButton, R.drawable.ic_action_keyboard);
+                    }
+
+                    //else, open the text keyboard first and immediately after that show the emoji popup
+                    else{
+                        mEditMessage.setFocusableInTouchMode(true);
+                        mEditMessage.requestFocus();
+                        mEmojPopup.showAtBottomPending();
+                        final InputMethodManager inputMethodManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
+                        inputMethodManager.showSoftInput(mEditMessage, InputMethodManager.SHOW_IMPLICIT);
+                        changeEmojiKeyboardIcon(mEmojButton, R.drawable.ic_action_keyboard);
+                    }
+                }
+
+                //If popup is showing, simply dismiss it to show the undelying text keyboard
+                else{
+                    mEmojPopup.dismiss();
+                }
+            }
+        });
+
+        // End of emojicon
+
+		mSendButton = (ImageButton) view.findViewById(R.id.textSendButton);
+		mSendButton.setOnClickListener(this.mSendButtonListener);
+
+		snackbar = (RelativeLayout) view.findViewById(R.id.snackbar);
+		snackbarMessage = (TextView) view.findViewById(R.id.snackbar_message);
+		snackbarAction = (TextView) view.findViewById(R.id.snackbar_action);
+
+		messagesView = (ListView) view.findViewById(R.id.messages_view);
+		messagesView.setOnScrollListener(mOnScrollListener);
+		messagesView.setTranscriptMode(ListView.TRANSCRIPT_MODE_NORMAL);
+		messageListAdapter = new MessageAdapter((ConversationActivity) getActivity(), this.messageList);
+		messageListAdapter.setOnContactPictureClicked(new OnContactPictureClicked() {
+
+			@Override
+			public void onContactPictureClicked(Message message) {
+				if (message.getStatus() <= Message.STATUS_RECEIVED) {
+					if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
+						if (message.getCounterpart() != null) {
+							if (!message.getCounterpart().isBareJid()) {
+								highlightInConference(message.getCounterpart().getResourcepart());
+							} else {
+								highlightInConference(message.getCounterpart().toString());
+							}
+						}
+					} else {
+						activity.switchToContactDetails(message.getContact());
+					}
+				} else {
+					Account account = message.getConversation().getAccount();
+					Intent intent = new Intent(activity, EditAccountActivity.class);
+					intent.putExtra("jid", account.getJid().toBareJid().toString());
+					startActivity(intent);
+				}
+			}
+		});
+		messageListAdapter
+			.setOnContactPictureLongClicked(new OnContactPictureLongClicked() {
+
+				@Override
+				public void onContactPictureLongClicked(Message message) {
+					if (message.getStatus() <= Message.STATUS_RECEIVED) {
+						if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
+							if (message.getCounterpart() != null) {
+								privateMessageWith(message.getCounterpart());
+							}
+						}
+					} else {
+						activity.showQrCode();
+					}
+				}
+			});
+		messagesView.setAdapter(messageListAdapter);
+
+		registerForContextMenu(messagesView);
+
+		return view;
+	}
+
+	@Override
+	public void onCreateContextMenu(ContextMenu menu, View v,
+			ContextMenuInfo menuInfo) {
+		synchronized (this.messageList) {
+			super.onCreateContextMenu(menu, v, menuInfo);
+			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
+			this.selectedMessage = this.messageList.get(acmi.position);
+			populateContextMenu(menu);
+		}
+	}
+
+	private void populateContextMenu(ContextMenu menu) {
+		final Message m = this.selectedMessage;
+		if (m.getType() != Message.TYPE_STATUS) {
+			activity.getMenuInflater().inflate(R.menu.message_context, menu);
+			menu.setHeaderTitle(R.string.message_options);
+			MenuItem copyText = menu.findItem(R.id.copy_text);
+			MenuItem shareWith = menu.findItem(R.id.share_with);
+			MenuItem sendAgain = menu.findItem(R.id.send_again);
+			MenuItem copyUrl = menu.findItem(R.id.copy_url);
+			MenuItem downloadImage = menu.findItem(R.id.download_image);
+			MenuItem cancelTransmission = menu.findItem(R.id.cancel_transmission);
+			if ((m.getType() != Message.TYPE_TEXT && m.getType() != Message.TYPE_PRIVATE)
+					|| m.getDownloadable() != null || GeoHelper.isGeoUri(m.getBody())) {
+				copyText.setVisible(false);
+			}
+			if ((m.getType() == Message.TYPE_TEXT
+					|| m.getType() == Message.TYPE_PRIVATE
+					|| m.getDownloadable() != null)
+				&& (!GeoHelper.isGeoUri(m.getBody()))) {
+				shareWith.setVisible(false);
+			}
+			if (m.getStatus() != Message.STATUS_SEND_FAILED) {
+				sendAgain.setVisible(false);
+			}
+			if (((m.getType() != Message.TYPE_IMAGE && m.getDownloadable() == null)
+					|| m.getImageParams().url == null) && !GeoHelper.isGeoUri(m.getBody())) {
+				copyUrl.setVisible(false);
+					}
+			if (m.getType() != Message.TYPE_TEXT
+					|| m.getDownloadable() != null
+					|| !m.bodyContainsDownloadable()) {
+				downloadImage.setVisible(false);
+					}
+			if (!((m.getDownloadable() != null && !(m.getDownloadable() instanceof DownloadablePlaceholder))
+						|| (m.isFileOrImage() && (m.getStatus() == Message.STATUS_WAITING
+								|| m.getStatus() == Message.STATUS_OFFERED)))) {
+				cancelTransmission.setVisible(false);
+								}
+		}
+	}
+
+	@Override
+	public boolean onContextItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.share_with:
+				shareWith(selectedMessage);
+				return true;
+			case R.id.copy_text:
+				copyText(selectedMessage);
+				return true;
+			case R.id.send_again:
+				resendMessage(selectedMessage);
+				return true;
+			case R.id.copy_url:
+				copyUrl(selectedMessage);
+				return true;
+			case R.id.download_image:
+				downloadImage(selectedMessage);
+				return true;
+			case R.id.cancel_transmission:
+				cancelTransmission(selectedMessage);
+				return true;
+			default:
+				return super.onContextItemSelected(item);
+		}
+	}
+
+	private void shareWith(Message message) {
+		Intent shareIntent = new Intent();
+		shareIntent.setAction(Intent.ACTION_SEND);
+		if (GeoHelper.isGeoUri(message.getBody())) {
+			shareIntent.putExtra(Intent.EXTRA_TEXT, message.getBody());
+			shareIntent.setType("text/plain");
+		} else {
+			shareIntent.putExtra(Intent.EXTRA_STREAM,
+					activity.xmppConnectionService.getFileBackend()
+							.getJingleFileUri(message));
+			shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+			String path = message.getRelativeFilePath();
+			String mime = path == null ? null : URLConnection.guessContentTypeFromName(path);
+			if (mime == null) {
+				mime = "image/webp";
+			}
+			shareIntent.setType(mime);
+		}
+		activity.startActivity(Intent.createChooser(shareIntent,getText(R.string.share_with)));
+	}
+
+	private void copyText(Message message) {
+		if (activity.copyTextToClipboard(message.getMergedBody(),
+					R.string.message_text)) {
+			Toast.makeText(activity, R.string.message_copied_to_clipboard,
+					Toast.LENGTH_SHORT).show();
+		}
+	}
+
+	private void resendMessage(Message message) {
+		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
+			DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
+			if (!file.exists()) {
+				Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
+				message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+				return;
+			}
+		}
+		activity.xmppConnectionService.resendFailedMessages(message);
+	}
+
+	private void copyUrl(Message message) {
+		final String url;
+		final int resId;
+		if (GeoHelper.isGeoUri(message.getBody())) {
+			resId = R.string.location;
+			url = message.getBody();
+		} else {
+			resId = R.string.image_url;
+			url = message.getImageParams().url.toString();
+		}
+		if (activity.copyTextToClipboard(url, resId)) {
+			Toast.makeText(activity, R.string.url_copied_to_clipboard,
+					Toast.LENGTH_SHORT).show();
+					}
+	}
+
+	private void downloadImage(Message message) {
+		activity.xmppConnectionService.getHttpConnectionManager()
+			.createNewConnection(message);
+	}
+
+	private void cancelTransmission(Message message) {
+		Downloadable downloadable = message.getDownloadable();
+		if (downloadable!=null) {
+			downloadable.cancel();
+		} else {
+			activity.xmppConnectionService.markMessage(message,Message.STATUS_SEND_FAILED);
+		}
+	}
+
+	protected void privateMessageWith(final Jid counterpart) {
+		this.mEditMessage.setText("");
+		this.conversation.setNextCounterpart(counterpart);
+		updateChatMsgHint();
+	}
+
+	protected void highlightInConference(String nick) {
+		String oldString = mEditMessage.getText().toString();
+		if (oldString.isEmpty() || mEditMessage.getSelectionStart() == 0) {
+			mEditMessage.getText().insert(0, nick + ": ");
+		} else {
+			if (mEditMessage.getText().charAt(
+						mEditMessage.getSelectionStart() - 1) != ' ') {
+				nick = " " + nick;
+						}
+			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
+					nick + " ");
+		}
+	}
+
+	@Override
+	public void onStop() {
+		mDecryptJobRunning = false;
+		super.onStop();
+		if (this.conversation != null) {
+			final String msg = mEditMessage.getText().toString();
+			this.conversation.setNextMessage(msg);
+			updateChatState(this.conversation,msg);
+		}
+	}
+
+	private void updateChatState(final Conversation conversation, final String msg) {
+		ChatState state = msg.length() == 0 ? Config.DEFAULT_CHATSTATE : ChatState.PAUSED;
+		Account.State status = conversation.getAccount().getStatus();
+		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(state)) {
+			activity.xmppConnectionService.sendChatState(conversation);
+		}
+	}
+
+	public void reInit(Conversation conversation) {
+		if (conversation == null) {
+			return;
+		}
+
+		this.activity = (ConversationActivity) getActivity();
+
+		if (this.conversation != null) {
+			final String msg = mEditMessage.getText().toString();
+			this.conversation.setNextMessage(msg);
+			if (this.conversation != conversation) {
+				updateChatState(this.conversation,msg);
+			}
+			this.conversation.trim();
+		}
+
+		this.askForPassphraseIntent = null;
+		this.conversation = conversation;
+		this.mDecryptJobRunning = false;
+		this.mEncryptedMessages.clear();
+		if (this.conversation.getMode() == Conversation.MODE_MULTI) {
+			this.conversation.setNextCounterpart(null);
+		}
+		this.mEditMessage.setKeyboardListener(null);
+		this.mEditMessage.setText("");
+		this.mEditMessage.append(this.conversation.getNextMessage());
+		this.mEditMessage.setKeyboardListener(this);
+		this.messagesView.setAdapter(messageListAdapter);
+		updateMessages();
+		this.messagesLoaded = true;
+		int size = this.messageList.size();
+		if (size > 0) {
+			messagesView.setSelection(size - 1);
+		}
+	}
+
+	private OnClickListener mUnblockClickListener = new OnClickListener() {
+		@Override
+		public void onClick(final View v) {
+			v.post(new Runnable() {
+				@Override
+				public void run() {
+					v.setVisibility(View.INVISIBLE);
+				}
+			});
+			if (conversation.isDomainBlocked()) {
+				BlockContactDialog.show(activity, activity.xmppConnectionService, conversation);
+			} else {
+				activity.unblockConversation(conversation);
+			}
+		}
+	};
+
+	private OnClickListener mAddBackClickListener = new OnClickListener() {
+
+		@Override
+		public void onClick(View v) {
+			final Contact contact = conversation == null ? null :conversation.getContact();
+			if (contact != null) {
+				activity.xmppConnectionService.createContact(contact);
+				activity.switchToContactDetails(contact);
+			}
+		}
+	};
+
+	private OnClickListener mUnmuteClickListener = new OnClickListener() {
+
+		@Override
+		public void onClick(final View v) {
+			activity.unmuteConversation(conversation);
+		}
+	};
+
+	private OnClickListener mAnswerSmpClickListener = new OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			Intent intent = new Intent(activity, VerifyOTRActivity.class);
+			intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
+			intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
+			intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
+			intent.putExtra("mode",VerifyOTRActivity.MODE_ANSWER_QUESTION);
+			startActivity(intent);
+		}
+	};
+
+	private void updateSnackBar(final Conversation conversation) {
+		final Account account = conversation.getAccount();
+		final Contact contact = conversation.getContact();
+		final int mode = conversation.getMode();
+		if (conversation.isBlocked()) {
+			showSnackbar(R.string.contact_blocked, R.string.unblock,this.mUnblockClickListener);
+		} else if (!contact.showInRoster() && contact.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
+			showSnackbar(R.string.contact_added_you, R.string.add_back,this.mAddBackClickListener);
+		} else if (mode == Conversation.MODE_MULTI
+				&&!conversation.getMucOptions().online()
+				&& account.getStatus() == Account.State.ONLINE) {
+			switch (conversation.getMucOptions().getError()) {
+				case MucOptions.ERROR_NICK_IN_USE:
+					showSnackbar(R.string.nick_in_use, R.string.edit, clickToMuc);
+					break;
+				case MucOptions.ERROR_UNKNOWN:
+					showSnackbar(R.string.conference_not_found, R.string.leave, leaveMuc);
+					break;
+				case MucOptions.ERROR_PASSWORD_REQUIRED:
+					showSnackbar(R.string.conference_requires_password, R.string.enter_password, enterPassword);
+					break;
+				case MucOptions.ERROR_BANNED:
+					showSnackbar(R.string.conference_banned, R.string.leave, leaveMuc);
+					break;
+				case MucOptions.ERROR_MEMBERS_ONLY:
+					showSnackbar(R.string.conference_members_only, R.string.leave, leaveMuc);
+					break;
+				case MucOptions.KICKED_FROM_ROOM:
+					showSnackbar(R.string.conference_kicked, R.string.join, joinMuc);
+					break;
+				default:
+					break;
+			}
+		} else if (askForPassphraseIntent != null ) {
+			showSnackbar(R.string.openpgp_messages_found,R.string.decrypt, clickToDecryptListener);
+		} else if (mode == Conversation.MODE_SINGLE
+				&& conversation.smpRequested()) {
+			showSnackbar(R.string.smp_requested, R.string.verify,this.mAnswerSmpClickListener);
+		} else if (mode == Conversation.MODE_SINGLE
+				&&conversation.hasValidOtrSession()
+				&& (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
+				&& (!conversation.isOtrFingerprintVerified())) {
+			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
+		} else if (conversation.isMuted()) {
+			showSnackbar(R.string.notifications_disabled, R.string.enable,this.mUnmuteClickListener);
+		} else {
+			hideSnackbar();
+		}
+	}
+
+	public void updateMessages() {
+		synchronized (this.messageList) {
+			if (getView() == null) {
+				return;
+			}
+			final ConversationActivity activity = (ConversationActivity) getActivity();
+			if (this.conversation != null) {
+				updateSnackBar(this.conversation);
+				final Contact contact = this.conversation.getContact();
+				if (this.conversation.isBlocked()) {
+
+				} else if (!contact.showInRoster()
+						&& contact
+						.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
+
+				} else if (conversation.getMode() == Conversation.MODE_SINGLE) {
+					makeFingerprintWarning();
+				} else if (!conversation.getMucOptions().online()
+						&& conversation.getAccount().getStatus() == Account.State.ONLINE) {
+
+				} else if (this.conversation.isMuted()) {
+
+				}
+				conversation.populateWithMessages(ConversationFragment.this.messageList);
+				for (final Message message : this.messageList) {
+					if (message.getEncryption() == Message.ENCRYPTION_PGP
+							&& (message.getStatus() == Message.STATUS_RECEIVED || message
+								.getStatus() >= Message.STATUS_SEND)
+							&& message.getDownloadable() == null) {
+						if (!mEncryptedMessages.contains(message)) {
+							mEncryptedMessages.add(message);
+						}
+							}
+				}
+				decryptNext();
+				updateStatusMessages();
+				this.messageListAdapter.notifyDataSetChanged();
+				updateChatMsgHint();
+				if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
+					activity.sendReadMarkerIfNecessary(conversation);
+				}
+				this.updateSendButton();
+			}
+		}
+	}
+
+	private void decryptNext() {
+		Message next = this.mEncryptedMessages.peek();
+		PgpEngine engine = activity.xmppConnectionService.getPgpEngine();
+
+		if (next != null && engine != null && !mDecryptJobRunning) {
+			mDecryptJobRunning = true;
+			engine.decrypt(next, new UiCallback<Message>() {
+
+				@Override
+				public void userInputRequried(PendingIntent pi, Message message) {
+					mDecryptJobRunning = false;
+					askForPassphraseIntent = pi.getIntentSender();
+					updateSnackBar(conversation);
+				}
+
+				@Override
+				public void success(Message message) {
+					mDecryptJobRunning = false;
+					try {
+						mEncryptedMessages.remove();
+					} catch (final NoSuchElementException ignored) {
+
+					}
+					activity.xmppConnectionService.updateMessage(message);
+				}
+
+				@Override
+				public void error(int error, Message message) {
+					message.setEncryption(Message.ENCRYPTION_DECRYPTION_FAILED);
+					mDecryptJobRunning = false;
+					try {
+						mEncryptedMessages.remove();
+					} catch (final NoSuchElementException ignored) {
+
+					}
+					activity.xmppConnectionService.updateConversationUi();
+				}
+			});
+		}
+	}
+
+	private void messageSent() {
+		int size = this.messageList.size();
+		messagesView.setSelection(size - 1);
+		mEditMessage.setText("");
+		updateChatMsgHint();
+	}
+
+	public void updateSendButton() {
+		Conversation c = this.conversation;
+		if (Settings.SHOW_ONLINE_STATUS && c != null
+				&& c.getAccount().getStatus() == Account.State.ONLINE) {
+			if (c.getMode() == Conversation.MODE_SINGLE) {
+				switch (c.getContact().getMostAvailableStatus()) {
+					case Presences.CHAT:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_online);
+						break;
+					case Presences.ONLINE:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_online);
+						break;
+					case Presences.AWAY:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_away);
+						break;
+					case Presences.XA:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_away);
+						break;
+					case Presences.DND:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_dnd);
+						break;
+					default:
+						this.mSendButton
+							.setImageResource(R.drawable.ic_action_send_now_offline);
+						break;
+				}
+			} else if (c.getMode() == Conversation.MODE_MULTI) {
+				if (c.getMucOptions().online()) {
+					this.mSendButton
+						.setImageResource(R.drawable.ic_action_send_now_online);
+				} else {
+					this.mSendButton
+						.setImageResource(R.drawable.ic_action_send_now_offline);
+				}
+			} else {
+				this.mSendButton
+					.setImageResource(R.drawable.ic_action_send_now_offline);
+			}
+		} else {
+			this.mSendButton
+				.setImageResource(R.drawable.ic_action_send_now_offline);
+		}
+	}
+
+	protected void updateStatusMessages() {
+		synchronized (this.messageList) {
+			if (conversation.getMode() == Conversation.MODE_SINGLE) {
+				ChatState state = conversation.getIncomingChatState();
+				if (state == ChatState.COMPOSING) {
+					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_is_typing, conversation.getName())));
+				} else if (state == ChatState.PAUSED) {
+					this.messageList.add(Message.createStatusMessage(conversation, getString(R.string.contact_has_stopped_typing, conversation.getName())));
+				} else {
+					for (int i = this.messageList.size() - 1; i >= 0; --i) {
+						if (this.messageList.get(i).getStatus() == Message.STATUS_RECEIVED) {
+							return;
+						} else {
+							if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
+								this.messageList.add(i + 1,
+										Message.createStatusMessage(conversation, getString(R.string.contact_has_read_up_to_this_point, conversation.getName())));
+								return;
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	protected void makeFingerprintWarning() {
+
+	}
+
+	protected void showSnackbar(final int message, final int action,
+			final OnClickListener clickListener) {
+		snackbar.setVisibility(View.VISIBLE);
+		snackbar.setOnClickListener(null);
+		snackbarMessage.setText(message);
+		snackbarMessage.setOnClickListener(null);
+		snackbarAction.setVisibility(View.VISIBLE);
+		snackbarAction.setText(action);
+		snackbarAction.setOnClickListener(clickListener);
+	}
+
+	protected void hideSnackbar() {
+		snackbar.setVisibility(View.GONE);
+	}
+
+	protected void sendPlainTextMessage(Message message) {
+		ConversationActivity activity = (ConversationActivity) getActivity();
+		activity.xmppConnectionService.sendMessage(message);
+		messageSent();
+	}
+
+	protected void sendPgpMessage(final Message message) {
+		final ConversationActivity activity = (ConversationActivity) getActivity();
+		final XmppConnectionService xmppService = activity.xmppConnectionService;
+		final Contact contact = message.getConversation().getContact();
+		if (activity.hasPgp()) {
+			if (conversation.getMode() == Conversation.MODE_SINGLE) {
+				if (contact.getPgpKeyId() != 0) {
+					xmppService.getPgpEngine().hasKey(contact,
+							new UiCallback<Contact>() {
+
+								@Override
+								public void userInputRequried(PendingIntent pi,
+										Contact contact) {
+									activity.runIntent(
+											pi,
+											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
+								}
+
+								@Override
+								public void success(Contact contact) {
+									messageSent();
+									activity.encryptTextMessage(message);
+								}
+
+								@Override
+								public void error(int error, Contact contact) {
+
+								}
+							});
+
+				} else {
+					showNoPGPKeyDialog(false,
+							new DialogInterface.OnClickListener() {
+
+								@Override
+								public void onClick(DialogInterface dialog,
+										int which) {
+									conversation
+										.setNextEncryption(Message.ENCRYPTION_NONE);
+									xmppService.databaseBackend
+										.updateConversation(conversation);
+									message.setEncryption(Message.ENCRYPTION_NONE);
+									xmppService.sendMessage(message);
+									messageSent();
+								}
+							});
+				}
+			} else {
+				if (conversation.getMucOptions().pgpKeysInUse()) {
+					if (!conversation.getMucOptions().everybodyHasKeys()) {
+						Toast warning = Toast
+							.makeText(getActivity(),
+									R.string.missing_public_keys,
+									Toast.LENGTH_LONG);
+						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
+						warning.show();
+					}
+					activity.encryptTextMessage(message);
+					messageSent();
+				} else {
+					showNoPGPKeyDialog(true,
+							new DialogInterface.OnClickListener() {
+
+								@Override
+								public void onClick(DialogInterface dialog,
+										int which) {
+									conversation
+										.setNextEncryption(Message.ENCRYPTION_NONE);
+									message.setEncryption(Message.ENCRYPTION_NONE);
+									xmppService.databaseBackend
+										.updateConversation(conversation);
+									xmppService.sendMessage(message);
+									messageSent();
+								}
+							});
+				}
+			}
+		} else {
+			activity.showInstallPgpDialog();
+		}
+	}
+
+	public void showNoPGPKeyDialog(boolean plural,
+			DialogInterface.OnClickListener listener) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		if (plural) {
+			builder.setTitle(getString(R.string.no_pgp_keys));
+			builder.setMessage(getText(R.string.contacts_have_no_pgp_keys));
+		} else {
+			builder.setTitle(getString(R.string.no_pgp_key));
+			builder.setMessage(getText(R.string.contact_has_no_pgp_key));
+		}
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton(getString(R.string.send_unencrypted),
+				listener);
+		builder.create().show();
+	}
+
+	protected void sendOtrMessage(final Message message) {
+		final ConversationActivity activity = (ConversationActivity) getActivity();
+		final XmppConnectionService xmppService = activity.xmppConnectionService;
+		activity.selectPresence(message.getConversation(),
+                new OnPresenceSelected() {
+
+                    @Override
+                    public void onPresenceSelected() {
+                        message.setCounterpart(conversation.getNextCounterpart());
+                        xmppService.sendMessage(message);
+                        messageSent();
+                    }
+                });
+	}
+
+	public void appendText(String text) {
+		String previous = this.mEditMessage.getText().toString();
+		if (previous.length() != 0 && !previous.endsWith(" ")) {
+			text = " " + text;
+		}
+		this.mEditMessage.append(text);
+	}
+
+	@Override
+	public boolean onEnterPressed() {
+		if (activity.enterIsSend()) {
+			sendMessage();
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	@Override
+	public void onTypingStarted() {
+		Account.State status = conversation.getAccount().getStatus();
+		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.COMPOSING)) {
+			activity.xmppConnectionService.sendChatState(conversation);
+		}
+	}
+
+	@Override
+	public void onTypingStopped() {
+		Account.State status = conversation.getAccount().getStatus();
+		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(ChatState.PAUSED)) {
+			activity.xmppConnectionService.sendChatState(conversation);
+		}
+	}
+
+	@Override
+	public void onTextDeleted() {
+		Account.State status = conversation.getAccount().getStatus();
+		if (status == Account.State.ONLINE && conversation.setOutgoingChatState(Config.DEFAULT_CHATSTATE)) {
+			activity.xmppConnectionService.sendChatState(conversation);
+		}
+	}
+
+    private void changeEmojiKeyboardIcon(ImageView iconToBeChanged, int drawableResourceId){
+        iconToBeChanged.setImageResource(drawableResourceId);
+    }
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java
new file mode 100644
index 00000000..0023d6ed
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/EditAccountActivity.java
@@ -0,0 +1,505 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.AutoCompleteTextView;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.RelativeLayout;
+import android.widget.TableLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.ui.adapter.KnownHostsAdapter;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xmpp.XmppConnection.Features;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+
+public class EditAccountActivity extends XmppActivity implements OnAccountUpdate{
+
+	private AutoCompleteTextView mAccountJid;
+	private EditText mPassword;
+	private EditText mPasswordConfirm;
+	private CheckBox mRegisterNew;
+	private Button mCancelButton;
+	private Button mSaveButton;
+	private TableLayout mMoreTable;
+
+	private LinearLayout mStats;
+	private TextView mServerInfoSm;
+	private TextView mServerInfoRosterVersion;
+	private TextView mServerInfoCarbons;
+	private TextView mServerInfoMam;
+	private TextView mServerInfoCSI;
+	private TextView mServerInfoBlocking;
+	private TextView mServerInfoPep;
+	private TextView mSessionEst;
+	private TextView mOtrFingerprint;
+	private ImageView mAvatar;
+	private RelativeLayout mOtrFingerprintBox;
+	private ImageButton mOtrFingerprintToClipboardButton;
+
+	private Jid jidToEdit;
+	private Account mAccount;
+
+	private boolean mFetchingAvatar = false;
+
+	private final OnClickListener mSaveButtonClickListener = new OnClickListener() {
+
+		@Override
+		public void onClick(final View v) {
+			if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
+				mAccount.setOption(Account.OPTION_DISABLED, false);
+				xmppConnectionService.updateAccount(mAccount);
+				return;
+			}
+			final boolean registerNewAccount = mRegisterNew.isChecked();
+			final Jid jid;
+			try {
+				jid = Jid.fromString(mAccountJid.getText().toString());
+			} catch (final InvalidJidException e) {
+				mAccountJid.setError(getString(R.string.invalid_jid));
+				mAccountJid.requestFocus();
+				return;
+			}
+			if (jid.isDomainJid()) {
+				mAccountJid.setError(getString(R.string.invalid_jid));
+				mAccountJid.requestFocus();
+				return;
+			}
+			final String password = mPassword.getText().toString();
+			final String passwordConfirm = mPasswordConfirm.getText().toString();
+			if (registerNewAccount) {
+				if (!password.equals(passwordConfirm)) {
+					mPasswordConfirm.setError(getString(R.string.passwords_do_not_match));
+					mPasswordConfirm.requestFocus();
+					return;
+				}
+			}
+			if (mAccount != null) {
+				try {
+					mAccount.setUsername(jid.hasLocalpart() ? jid.getLocalpart() : "");
+					mAccount.setServer(jid.getDomainpart());
+				} catch (final InvalidJidException ignored) {
+					return;
+				}
+				mAccountJid.setError(null);
+				mPasswordConfirm.setError(null);
+				mAccount.setPassword(password);
+				mAccount.setOption(Account.OPTION_REGISTER, registerNewAccount);
+				xmppConnectionService.updateAccount(mAccount);
+			} else {
+				try {
+					if (xmppConnectionService.findAccountByJid(Jid.fromString(mAccountJid.getText().toString())) != null) {
+						mAccountJid.setError(getString(R.string.account_already_exists));
+						mAccountJid.requestFocus();
+						return;
+					}
+				} catch (final InvalidJidException e) {
+					return;
+				}
+				mAccount = new Account(jid.toBareJid(), password);
+				mAccount.setOption(Account.OPTION_USETLS, true);
+				mAccount.setOption(Account.OPTION_USECOMPRESSION, true);
+				mAccount.setOption(Account.OPTION_REGISTER, registerNewAccount);
+				xmppConnectionService.createAccount(mAccount);
+			}
+			if (jidToEdit != null) {
+				finish();
+			} else {
+				updateSaveButton();
+				updateAccountInformation();
+			}
+
+		}
+	};
+	private final OnClickListener mCancelButtonClickListener = new OnClickListener() {
+
+		@Override
+		public void onClick(final View v) {
+			finish();
+		}
+	};
+	@Override
+	public void onAccountUpdate() {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				invalidateOptionsMenu();
+				if (mAccount != null
+						&& mAccount.getStatus() != Account.State.ONLINE
+						&& mFetchingAvatar) {
+					startActivity(new Intent(getApplicationContext(),
+								ManageAccountActivity.class));
+					finish();
+				} else if (jidToEdit == null && mAccount != null
+						&& mAccount.getStatus() == Account.State.ONLINE) {
+					if (!mFetchingAvatar) {
+						mFetchingAvatar = true;
+						xmppConnectionService.checkForAvatar(mAccount,
+								mAvatarFetchCallback);
+					}
+				} else {
+					updateSaveButton();
+				}
+				if (mAccount != null) {
+					updateAccountInformation();
+				}
+			}
+		});
+	}
+	private final UiCallback<Avatar> mAvatarFetchCallback = new UiCallback<Avatar>() {
+
+		@Override
+		public void userInputRequried(final PendingIntent pi, final Avatar avatar) {
+			finishInitialSetup(avatar);
+		}
+
+		@Override
+		public void success(final Avatar avatar) {
+			finishInitialSetup(avatar);
+		}
+
+		@Override
+		public void error(final int errorCode, final Avatar avatar) {
+			finishInitialSetup(avatar);
+		}
+	};
+	private final TextWatcher mTextWatcher = new TextWatcher() {
+
+		@Override
+		public void onTextChanged(final CharSequence s, final int start, final int before, final int count) {
+			updateSaveButton();
+		}
+
+		@Override
+		public void beforeTextChanged(final CharSequence s, final int start, final int count, final int after) {
+		}
+
+		@Override
+		public void afterTextChanged(final Editable s) {
+
+		}
+	};
+
+	private final OnClickListener mAvatarClickListener = new OnClickListener() {
+		@Override
+		public void onClick(final View view) {
+			if (mAccount != null) {
+				final Intent intent = new Intent(getApplicationContext(),
+						PublishProfilePictureActivity.class);
+				intent.putExtra("account", mAccount.getJid().toBareJid().toString());
+				startActivity(intent);
+			}
+		}
+	};
+
+	protected void finishInitialSetup(final Avatar avatar) {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				final Intent intent;
+				if (avatar != null) {
+					intent = new Intent(getApplicationContext(),
+							StartConversationActivity.class);
+					intent.putExtra("init",true);
+				} else {
+					intent = new Intent(getApplicationContext(),
+							PublishProfilePictureActivity.class);
+					intent.putExtra("account", mAccount.getJid().toBareJid().toString());
+					intent.putExtra("setup", true);
+				}
+				startActivity(intent);
+				finish();
+			}
+		});
+	}
+
+	protected void updateSaveButton() {
+		if (mAccount != null && (mAccount.getStatus() == Account.State.CONNECTING || mFetchingAvatar)) {
+			this.mSaveButton.setEnabled(false);
+			this.mSaveButton.setTextColor(getSecondaryTextColor());
+			this.mSaveButton.setText(R.string.account_status_connecting);
+		} else if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
+			this.mSaveButton.setEnabled(true);
+			this.mSaveButton.setTextColor(getPrimaryTextColor());
+			this.mSaveButton.setText(R.string.enable);
+		} else {
+			this.mSaveButton.setEnabled(true);
+			this.mSaveButton.setTextColor(getPrimaryTextColor());
+			if (jidToEdit != null) {
+				if (mAccount != null && mAccount.isOnlineAndConnected()) {
+					this.mSaveButton.setText(R.string.save);
+					if (!accountInfoEdited()) {
+						this.mSaveButton.setEnabled(false);
+						this.mSaveButton.setTextColor(getSecondaryTextColor());
+					}
+				} else {
+					this.mSaveButton.setText(R.string.connect);
+				}
+			} else {
+				this.mSaveButton.setText(R.string.next);
+			}
+		}
+	}
+
+	protected boolean accountInfoEdited() {
+		return (!this.mAccount.getJid().toBareJid().toString().equals(
+					this.mAccountJid.getText().toString()))
+			|| (!this.mAccount.getPassword().equals(
+						this.mPassword.getText().toString()));
+	}
+
+	@Override
+	protected String getShareableUri() {
+		if (mAccount!=null) {
+			return mAccount.getShareableUri();
+		} else {
+			return "";
+		}
+	}
+
+	@Override
+	protected void onCreate(final Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_edit_account);
+		this.mAccountJid = (AutoCompleteTextView) findViewById(R.id.account_jid);
+		this.mAccountJid.addTextChangedListener(this.mTextWatcher);
+		this.mPassword = (EditText) findViewById(R.id.account_password);
+		this.mPassword.addTextChangedListener(this.mTextWatcher);
+		this.mPasswordConfirm = (EditText) findViewById(R.id.account_password_confirm);
+		this.mAvatar = (ImageView) findViewById(R.id.avater);
+		this.mAvatar.setOnClickListener(this.mAvatarClickListener);
+		this.mRegisterNew = (CheckBox) findViewById(R.id.account_register_new);
+		this.mStats = (LinearLayout) findViewById(R.id.stats);
+		this.mSessionEst = (TextView) findViewById(R.id.session_est);
+		this.mServerInfoRosterVersion = (TextView) findViewById(R.id.server_info_roster_version);
+		this.mServerInfoCarbons = (TextView) findViewById(R.id.server_info_carbons);
+		this.mServerInfoMam = (TextView) findViewById(R.id.server_info_mam);
+		this.mServerInfoCSI = (TextView) findViewById(R.id.server_info_csi);
+		this.mServerInfoBlocking = (TextView) findViewById(R.id.server_info_blocking);
+		this.mServerInfoSm = (TextView) findViewById(R.id.server_info_sm);
+		this.mServerInfoPep = (TextView) findViewById(R.id.server_info_pep);
+		this.mOtrFingerprint = (TextView) findViewById(R.id.otr_fingerprint);
+		this.mOtrFingerprintBox = (RelativeLayout) findViewById(R.id.otr_fingerprint_box);
+		this.mOtrFingerprintToClipboardButton = (ImageButton) findViewById(R.id.action_copy_to_clipboard);
+		this.mSaveButton = (Button) findViewById(R.id.save_button);
+		this.mCancelButton = (Button) findViewById(R.id.cancel_button);
+		this.mSaveButton.setOnClickListener(this.mSaveButtonClickListener);
+		this.mCancelButton.setOnClickListener(this.mCancelButtonClickListener);
+		this.mMoreTable = (TableLayout) findViewById(R.id.server_info_more);
+		final OnCheckedChangeListener OnCheckedShowConfirmPassword = new OnCheckedChangeListener() {
+			@Override
+			public void onCheckedChanged(final CompoundButton buttonView,
+					final boolean isChecked) {
+				if (isChecked) {
+					mPasswordConfirm.setVisibility(View.VISIBLE);
+				} else {
+					mPasswordConfirm.setVisibility(View.GONE);
+				}
+				updateSaveButton();
+			}
+		};
+		this.mRegisterNew.setOnCheckedChangeListener(OnCheckedShowConfirmPassword);
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		super.onCreateOptionsMenu(menu);
+		getMenuInflater().inflate(R.menu.editaccount, menu);
+		final MenuItem showQrCode = menu.findItem(R.id.action_show_qr_code);
+		final MenuItem showBlocklist = menu.findItem(R.id.action_show_block_list);
+		final MenuItem showMoreInfo = menu.findItem(R.id.action_server_info_show_more);
+		final MenuItem changePassword = menu.findItem(R.id.action_change_password_on_server);
+		if (mAccount != null && mAccount.isOnlineAndConnected()) {
+			if (!mAccount.getXmppConnection().getFeatures().blocking()) {
+				showBlocklist.setVisible(false);
+			}
+			if (!mAccount.getXmppConnection().getFeatures().register()) {
+				changePassword.setVisible(false);
+			}
+		} else {
+			showQrCode.setVisible(false);
+			showBlocklist.setVisible(false);
+			showMoreInfo.setVisible(false);
+			changePassword.setVisible(false);
+		}
+		return true;
+	}
+
+	@Override
+	protected void onStart() {
+		super.onStart();
+		if (getIntent() != null) {
+			try {
+				this.jidToEdit = Jid.fromString(getIntent().getStringExtra("jid"));
+			} catch (final InvalidJidException | NullPointerException ignored) {
+				this.jidToEdit = null;
+			}
+			if (this.jidToEdit != null) {
+				this.mRegisterNew.setVisibility(View.GONE);
+				if (getActionBar() != null) {
+					getActionBar().setTitle(getString(R.string.account_details));
+				}
+			} else {
+				this.mAvatar.setVisibility(View.GONE);
+				if (getActionBar() != null) {
+					getActionBar().setTitle(R.string.action_add_account);
+				}
+			}
+		}
+	}
+
+	@Override
+	protected void onBackendConnected() {
+		final KnownHostsAdapter mKnownHostsAdapter = new KnownHostsAdapter(this,
+				android.R.layout.simple_list_item_1,
+				xmppConnectionService.getKnownHosts());
+		if (this.jidToEdit != null) {
+			this.mAccount = xmppConnectionService.findAccountByJid(jidToEdit);
+			updateAccountInformation();
+		} else if (this.xmppConnectionService.getAccounts().size() == 0) {
+			if (getActionBar() != null) {
+				getActionBar().setDisplayHomeAsUpEnabled(false);
+				getActionBar().setDisplayShowHomeEnabled(false);
+				getActionBar().setHomeButtonEnabled(false);
+			}
+			this.mCancelButton.setEnabled(false);
+			this.mCancelButton.setTextColor(getSecondaryTextColor());
+		}
+		this.mAccountJid.setAdapter(mKnownHostsAdapter);
+		updateSaveButton();
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.action_show_block_list:
+				final Intent showBlocklistIntent = new Intent(this, BlocklistActivity.class);
+				showBlocklistIntent.putExtra("account", mAccount.getJid().toString());
+				startActivity(showBlocklistIntent);
+				break;
+			case R.id.action_server_info_show_more:
+				mMoreTable.setVisibility(item.isChecked() ? View.GONE : View.VISIBLE);
+				item.setChecked(!item.isChecked());
+				break;
+			case R.id.action_change_password_on_server:
+				final Intent changePasswordIntent = new Intent(this, ChangePasswordActivity.class);
+				changePasswordIntent.putExtra("account", mAccount.getJid().toString());
+				startActivity(changePasswordIntent);
+				break;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	private void updateAccountInformation() {
+		this.mAccountJid.setText(this.mAccount.getJid().toBareJid().toString());
+		this.mPassword.setText(this.mAccount.getPassword());
+		if (this.jidToEdit != null) {
+			this.mAvatar.setVisibility(View.VISIBLE);
+			this.mAvatar.setImageBitmap(avatarService().get(this.mAccount, getPixel(72)));
+		}
+		if (this.mAccount.isOptionSet(Account.OPTION_REGISTER)) {
+			this.mRegisterNew.setVisibility(View.VISIBLE);
+			this.mRegisterNew.setChecked(true);
+			this.mPasswordConfirm.setText(this.mAccount.getPassword());
+		} else {
+			this.mRegisterNew.setVisibility(View.GONE);
+			this.mRegisterNew.setChecked(false);
+		}
+		if (this.mAccount.isOnlineAndConnected() && !this.mFetchingAvatar) {
+			this.mStats.setVisibility(View.VISIBLE);
+			this.mSessionEst.setText(UIHelper.readableTimeDifferenceFull(this, this.mAccount.getXmppConnection()
+						.getLastSessionEstablished()));
+			Features features = this.mAccount.getXmppConnection().getFeatures();
+			if (features.rosterVersioning()) {
+				this.mServerInfoRosterVersion.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoRosterVersion.setText(R.string.server_info_unavailable);
+			}
+			if (features.carbons()) {
+				this.mServerInfoCarbons.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoCarbons
+					.setText(R.string.server_info_unavailable);
+			}
+			if (features.mam()) {
+				this.mServerInfoMam.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoMam.setText(R.string.server_info_unavailable);
+			}
+			if (features.csi()) {
+				this.mServerInfoCSI.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoCSI.setText(R.string.server_info_unavailable);
+			}
+			if (features.blocking()) {
+				this.mServerInfoBlocking.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoBlocking.setText(R.string.server_info_unavailable);
+			}
+			if (features.sm()) {
+				this.mServerInfoSm.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoSm.setText(R.string.server_info_unavailable);
+			}
+			if (features.pubsub()) {
+				this.mServerInfoPep.setText(R.string.server_info_available);
+			} else {
+				this.mServerInfoPep.setText(R.string.server_info_unavailable);
+			}
+			final String fingerprint = this.mAccount.getOtrFingerprint();
+			if (fingerprint != null) {
+				this.mOtrFingerprintBox.setVisibility(View.VISIBLE);
+				this.mOtrFingerprint.setText(CryptoHelper.prettifyFingerprint(fingerprint));
+				this.mOtrFingerprintToClipboardButton
+					.setVisibility(View.VISIBLE);
+				this.mOtrFingerprintToClipboardButton
+					.setOnClickListener(new View.OnClickListener() {
+
+						@Override
+						public void onClick(final View v) {
+
+							if (copyTextToClipboard(fingerprint, R.string.otr_fingerprint)) {
+								Toast.makeText(
+										EditAccountActivity.this,
+										R.string.toast_message_otr_fingerprint,
+										Toast.LENGTH_SHORT).show();
+							}
+						}
+					});
+			} else {
+				this.mOtrFingerprintBox.setVisibility(View.GONE);
+			}
+		} else {
+			if (this.mAccount.errorStatus()) {
+				this.mAccountJid.setError(getString(this.mAccount.getStatus().getReadableId()));
+				this.mAccountJid.requestFocus();
+			} else {
+				this.mAccountJid.setError(null);
+			}
+			this.mStats.setVisibility(View.GONE);
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java b/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java
new file mode 100644
index 00000000..5c2e6164
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/EditMessage.java
@@ -0,0 +1,78 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.os.Handler;
+import android.util.AttributeSet;
+import android.view.KeyEvent;
+
+import de.thedevstack.conversationsplus.Config;
+import github.ankushsachdeva.emojicon.EmojiconEditText;
+
+public class EditMessage extends EmojiconEditText {
+
+	public EditMessage(Context context, AttributeSet attrs) {
+		super(context, attrs);
+	}
+
+	public EditMessage(Context context) {
+		super(context);
+	}
+
+	protected Handler mTypingHandler = new Handler();
+
+	protected Runnable mTypingTimeout = new Runnable() {
+		@Override
+		public void run() {
+			if (isUserTyping && keyboardListener != null) {
+				keyboardListener.onTypingStopped();
+				isUserTyping = false;
+			}
+		}
+	};
+
+	private boolean isUserTyping = false;
+
+	protected KeyboardListener keyboardListener;
+
+	@Override
+	public boolean onKeyDown(int keyCode, KeyEvent event) {
+		if (keyCode == KeyEvent.KEYCODE_ENTER) {
+			if (keyboardListener != null && keyboardListener.onEnterPressed()) {
+				return true;
+			}
+		}
+		return super.onKeyDown(keyCode, event);
+	}
+
+	@Override
+	public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
+		super.onTextChanged(text,start,lengthBefore,lengthAfter);
+		if (this.mTypingHandler != null && this.keyboardListener != null) {
+			this.mTypingHandler.removeCallbacks(mTypingTimeout);
+			this.mTypingHandler.postDelayed(mTypingTimeout, Config.TYPING_TIMEOUT * 1000);
+			final int length = text.length();
+			if (!isUserTyping && length > 0) {
+				this.isUserTyping = true;
+				this.keyboardListener.onTypingStarted();
+			} else if (length == 0) {
+				this.isUserTyping = false;
+				this.keyboardListener.onTextDeleted();
+			}
+		}
+	}
+
+	public void setKeyboardListener(KeyboardListener listener) {
+		this.keyboardListener = listener;
+		if (listener != null) {
+			this.isUserTyping = false;
+		}
+	}
+
+	public interface KeyboardListener {
+		public boolean onEnterPressed();
+		public void onTypingStarted();
+		public void onTypingStopped();
+		public void onTextDeleted();
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java
new file mode 100644
index 00000000..4f4282af
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ManageAccountActivity.java
@@ -0,0 +1,273 @@
+package de.thedevstack.conversationsplus.ui;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnAccountUpdate;
+import de.thedevstack.conversationsplus.ui.adapter.AccountAdapter;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.ContextMenu;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.widget.AdapterView;
+import android.widget.AdapterView.AdapterContextMenuInfo;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ListView;
+
+public class ManageAccountActivity extends XmppActivity implements OnAccountUpdate {
+
+	protected Account selectedAccount = null;
+
+	protected final List<Account> accountList = new ArrayList<>();
+	protected ListView accountListView;
+	protected AccountAdapter mAccountAdapter;
+
+	@Override
+	public void onAccountUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		synchronized (this.accountList) {
+			accountList.clear();
+			accountList.addAll(xmppConnectionService.getAccounts());
+		}
+		invalidateOptionsMenu();
+		mAccountAdapter.notifyDataSetChanged();
+	}
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+
+		super.onCreate(savedInstanceState);
+
+		setContentView(R.layout.manage_accounts);
+
+		accountListView = (ListView) findViewById(R.id.account_list);
+		this.mAccountAdapter = new AccountAdapter(this, accountList);
+		accountListView.setAdapter(this.mAccountAdapter);
+		accountListView.setOnItemClickListener(new OnItemClickListener() {
+
+			@Override
+			public void onItemClick(AdapterView<?> arg0, View view,
+					int position, long arg3) {
+				switchToAccount(accountList.get(position));
+			}
+		});
+		registerForContextMenu(accountListView);
+	}
+
+	@Override
+	public void onCreateContextMenu(ContextMenu menu, View v,
+			ContextMenuInfo menuInfo) {
+		super.onCreateContextMenu(menu, v, menuInfo);
+		ManageAccountActivity.this.getMenuInflater().inflate(
+				R.menu.manageaccounts_context, menu);
+		AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
+		this.selectedAccount = accountList.get(acmi.position);
+		if (this.selectedAccount.isOptionSet(Account.OPTION_DISABLED)) {
+			menu.findItem(R.id.mgmt_account_disable).setVisible(false);
+			menu.findItem(R.id.mgmt_account_announce_pgp).setVisible(false);
+			menu.findItem(R.id.mgmt_account_publish_avatar).setVisible(false);
+		} else {
+			menu.findItem(R.id.mgmt_account_enable).setVisible(false);
+		}
+		menu.setHeaderTitle(this.selectedAccount.getJid().toBareJid().toString());
+	}
+
+	@Override
+	void onBackendConnected() {
+		this.accountList.clear();
+		this.accountList.addAll(xmppConnectionService.getAccounts());
+		mAccountAdapter.notifyDataSetChanged();
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		getMenuInflater().inflate(R.menu.manageaccounts, menu);
+		MenuItem enableAll = menu.findItem(R.id.action_enable_all);
+		if (!accountsLeftToEnable()) {
+			enableAll.setVisible(false);
+		}
+		MenuItem disableAll = menu.findItem(R.id.action_disable_all);
+		if (!accountsLeftToDisable()) {
+			disableAll.setVisible(false);
+		}
+		return true;
+	}
+
+	@Override
+	public boolean onContextItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+		case R.id.mgmt_account_publish_avatar:
+			publishAvatar(selectedAccount);
+			return true;
+		case R.id.mgmt_account_disable:
+			disableAccount(selectedAccount);
+			return true;
+		case R.id.mgmt_account_enable:
+			enableAccount(selectedAccount);
+			return true;
+		case R.id.mgmt_account_delete:
+			deleteAccount(selectedAccount);
+			return true;
+		case R.id.mgmt_account_announce_pgp:
+			publishOpenPGPPublicKey(selectedAccount);
+			return true;
+		default:
+			return super.onContextItemSelected(item);
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.action_add_account:
+				startActivity(new Intent(getApplicationContext(),
+						EditAccountActivity.class));
+				break;
+			case R.id.action_disable_all:
+				disableAllAccounts();
+				break;
+			case R.id.action_enable_all:
+				enableAllAccounts();
+				break;
+			default:
+				break;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	public boolean onNavigateUp() {
+		if (xmppConnectionService.getConversations().size() == 0) {
+			Intent contactsIntent = new Intent(this,
+					StartConversationActivity.class);
+			contactsIntent.setFlags(
+			// if activity exists in stack, pop the stack and go back to it
+					Intent.FLAG_ACTIVITY_CLEAR_TOP |
+					// otherwise, make a new task for it
+							Intent.FLAG_ACTIVITY_NEW_TASK |
+							// don't use the new activity animation; finish
+							// animation runs instead
+							Intent.FLAG_ACTIVITY_NO_ANIMATION);
+			startActivity(contactsIntent);
+			finish();
+			return true;
+		} else {
+			return super.onNavigateUp();
+		}
+	}
+
+	private void publishAvatar(Account account) {
+		Intent intent = new Intent(getApplicationContext(),
+				PublishProfilePictureActivity.class);
+		intent.putExtra("account", account.getJid().toString());
+		startActivity(intent);
+	}
+
+	private void disableAllAccounts() {
+		List<Account> list = new ArrayList<>();
+		synchronized (this.accountList) {
+			for (Account account : this.accountList) {
+				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+					list.add(account);
+				}
+			}
+		}
+		for(Account account : list) {
+			disableAccount(account);
+		}
+	}
+
+	private boolean accountsLeftToDisable() {
+		synchronized (this.accountList) {
+			for (Account account : this.accountList) {
+				if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+					return true;
+				}
+			}
+			return false;
+		}
+	}
+
+	private boolean accountsLeftToEnable() {
+		synchronized (this.accountList) {
+			for (Account account : this.accountList) {
+				if (account.isOptionSet(Account.OPTION_DISABLED)) {
+					return true;
+				}
+			}
+			return false;
+		}
+	}
+
+	private void enableAllAccounts() {
+		List<Account> list = new ArrayList<>();
+		synchronized (this.accountList) {
+			for (Account account : this.accountList) {
+				if (account.isOptionSet(Account.OPTION_DISABLED)) {
+					list.add(account);
+				}
+			}
+		}
+		for(Account account : list) {
+			enableAccount(account);
+		}
+	}
+
+	private void disableAccount(Account account) {
+		account.setOption(Account.OPTION_DISABLED, true);
+		xmppConnectionService.updateAccount(account);
+	}
+
+	private void enableAccount(Account account) {
+		account.setOption(Account.OPTION_DISABLED, false);
+		xmppConnectionService.updateAccount(account);
+	}
+
+	private void publishOpenPGPPublicKey(Account account) {
+		if (ManageAccountActivity.this.hasPgp()) {
+			announcePgp(account, null);
+		} else {
+			this.showInstallPgpDialog();
+		}
+	}
+
+	private void deleteAccount(final Account account) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(
+				ManageAccountActivity.this);
+		builder.setTitle(getString(R.string.mgmt_account_are_you_sure));
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		builder.setMessage(getString(R.string.mgmt_account_delete_confirm_text));
+		builder.setPositiveButton(getString(R.string.delete),
+				new OnClickListener() {
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						xmppConnectionService.deleteAccount(account);
+						selectedAccount = null;
+					}
+				});
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.create().show();
+	}
+
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (resultCode == RESULT_OK) {
+			if (requestCode == REQUEST_ANNOUNCE_PGP) {
+				announcePgp(selectedAccount, null);
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java
new file mode 100644
index 00000000..852b5175
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/PublishProfilePictureActivity.java
@@ -0,0 +1,253 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnLongClickListener;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.utils.PhoneHelper;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.pep.Avatar;
+
+public class PublishProfilePictureActivity extends XmppActivity {
+
+	private static final int REQUEST_CHOOSE_FILE = 0xac23;
+
+	private ImageView avatar;
+	private TextView accountTextView;
+	private TextView hintOrWarning;
+	private TextView secondaryHint;
+	private Button cancelButton;
+	private Button publishButton;
+
+	private Uri avatarUri;
+	private Uri defaultUri;
+	private OnLongClickListener backToDefaultListener = new OnLongClickListener() {
+
+		@Override
+		public boolean onLongClick(View v) {
+			avatarUri = defaultUri;
+			loadImageIntoPreview(defaultUri);
+			return true;
+		}
+	};
+	private Account account;
+	private boolean support = false;
+	private boolean mInitialAccountSetup;
+	private UiCallback<Avatar> avatarPublication = new UiCallback<Avatar>() {
+
+		@Override
+		public void success(Avatar object) {
+			runOnUiThread(new Runnable() {
+
+				@Override
+				public void run() {
+					if (mInitialAccountSetup) {
+						Intent intent = new Intent(getApplicationContext(),
+								StartConversationActivity.class);
+						intent.putExtra("init",true);
+						startActivity(intent);
+					}
+					Toast.makeText(PublishProfilePictureActivity.this,
+							R.string.avatar_has_been_published,
+							Toast.LENGTH_SHORT).show();
+					finish();
+				}
+			});
+		}
+
+		@Override
+		public void error(final int errorCode, Avatar object) {
+			runOnUiThread(new Runnable() {
+
+				@Override
+				public void run() {
+					hintOrWarning.setText(errorCode);
+					hintOrWarning.setTextColor(getWarningTextColor());
+					publishButton.setText(R.string.publish);
+					enablePublishButton();
+				}
+			});
+
+		}
+
+		@Override
+		public void userInputRequried(PendingIntent pi, Avatar object) {
+		}
+	};
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_publish_profile_picture);
+		this.avatar = (ImageView) findViewById(R.id.account_image);
+		this.cancelButton = (Button) findViewById(R.id.cancel_button);
+		this.publishButton = (Button) findViewById(R.id.publish_button);
+		this.accountTextView = (TextView) findViewById(R.id.account);
+		this.hintOrWarning = (TextView) findViewById(R.id.hint_or_warning);
+		this.secondaryHint = (TextView) findViewById(R.id.secondary_hint);
+		this.publishButton.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				if (avatarUri != null) {
+					publishButton.setText(R.string.publishing);
+					disablePublishButton();
+					xmppConnectionService.publishAvatar(account, avatarUri,
+							avatarPublication);
+				}
+			}
+		});
+		this.cancelButton.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				if (mInitialAccountSetup) {
+					Intent intent = new Intent(getApplicationContext(),
+							StartConversationActivity.class);
+					intent.putExtra("init",true);
+					startActivity(intent);
+				}
+				finish();
+			}
+		});
+		this.avatar.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				Intent attachFileIntent = new Intent();
+				attachFileIntent.setType("image/*");
+				attachFileIntent.setAction(Intent.ACTION_GET_CONTENT);
+				Intent chooser = Intent.createChooser(attachFileIntent,
+						getString(R.string.attach_file));
+				startActivityForResult(chooser, REQUEST_CHOOSE_FILE);
+			}
+		});
+		this.defaultUri = PhoneHelper.getSefliUri(getApplicationContext());
+	}
+
+	@Override
+	protected void onActivityResult(int requestCode, int resultCode,
+			final Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (resultCode == RESULT_OK) {
+			if (requestCode == REQUEST_CHOOSE_FILE) {
+				this.avatarUri = data.getData();
+				if (xmppConnectionServiceBound) {
+					loadImageIntoPreview(this.avatarUri);
+				}
+			}
+		}
+	}
+
+	@Override
+	protected void onBackendConnected() {
+		if (getIntent() != null) {
+            Jid jid;
+            try {
+                jid = Jid.fromString(getIntent().getStringExtra("account"));
+            } catch (InvalidJidException e) {
+                jid = null;
+            }
+            if (jid != null) {
+				this.account = xmppConnectionService.findAccountByJid(jid);
+				if (this.account.getXmppConnection() != null) {
+					this.support = this.account.getXmppConnection()
+							.getFeatures().pubsub();
+				}
+				if (this.avatarUri == null) {
+					if (this.account.getAvatar() != null
+							|| this.defaultUri == null) {
+						this.avatar.setImageBitmap(avatarService().get(account,
+								getPixel(194)));
+						if (this.defaultUri != null) {
+							this.avatar
+									.setOnLongClickListener(this.backToDefaultListener);
+						} else {
+							this.secondaryHint.setVisibility(View.INVISIBLE);
+						}
+						if (!support) {
+							this.hintOrWarning
+									.setTextColor(getWarningTextColor());
+							this.hintOrWarning
+									.setText(R.string.error_publish_avatar_no_server_support);
+						}
+					} else {
+						this.avatarUri = this.defaultUri;
+						loadImageIntoPreview(this.defaultUri);
+						this.secondaryHint.setVisibility(View.INVISIBLE);
+					}
+				} else {
+					loadImageIntoPreview(avatarUri);
+				}
+				this.accountTextView.setText(this.account.getJid().toBareJid().toString());
+			}
+		}
+
+	}
+
+	@Override
+	protected void onStart() {
+		super.onStart();
+		if (getIntent() != null) {
+			this.mInitialAccountSetup = getIntent().getBooleanExtra("setup",
+					false);
+		}
+		if (this.mInitialAccountSetup) {
+			this.cancelButton.setText(R.string.skip);
+		}
+	}
+
+	protected void loadImageIntoPreview(Uri uri) {
+		Bitmap bm = xmppConnectionService.getFileBackend().cropCenterSquare(
+				uri, 384);
+		if (bm == null) {
+			disablePublishButton();
+			this.hintOrWarning.setTextColor(getWarningTextColor());
+			this.hintOrWarning
+					.setText(R.string.error_publish_avatar_converting);
+			return;
+		}
+		this.avatar.setImageBitmap(bm);
+		if (support) {
+			enablePublishButton();
+			this.publishButton.setText(R.string.publish);
+			this.hintOrWarning.setText(R.string.publish_avatar_explanation);
+			this.hintOrWarning.setTextColor(getPrimaryTextColor());
+		} else {
+			disablePublishButton();
+			this.hintOrWarning.setTextColor(getWarningTextColor());
+			this.hintOrWarning
+					.setText(R.string.error_publish_avatar_no_server_support);
+		}
+		if (this.defaultUri != null && uri.equals(this.defaultUri)) {
+			this.secondaryHint.setVisibility(View.INVISIBLE);
+			this.avatar.setOnLongClickListener(null);
+		} else if (this.defaultUri != null) {
+			this.secondaryHint.setVisibility(View.VISIBLE);
+			this.avatar.setOnLongClickListener(this.backToDefaultListener);
+		}
+	}
+
+	protected void enablePublishButton() {
+		this.publishButton.setEnabled(true);
+		this.publishButton.setTextColor(getPrimaryTextColor());
+	}
+
+	protected void disablePublishButton() {
+		this.publishButton.setEnabled(false);
+		this.publishButton.setTextColor(getSecondaryTextColor());
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
new file mode 100644
index 00000000..27e086ce
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
@@ -0,0 +1,92 @@
+package de.thedevstack.conversationsplus.ui;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Locale;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.entities.Account;
+
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.ListPreference;
+import android.preference.PreferenceManager;
+
+public class SettingsActivity extends XmppActivity implements
+		OnSharedPreferenceChangeListener {
+	private SettingsFragment mSettingsFragment;
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		mSettingsFragment = new SettingsFragment();
+		getFragmentManager().beginTransaction()
+				.replace(android.R.id.content, mSettingsFragment).commit();
+	}
+
+	@Override
+	void onBackendConnected() {
+
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		PreferenceManager.getDefaultSharedPreferences(this)
+				.registerOnSharedPreferenceChangeListener(this);
+		ListPreference resources = (ListPreference) mSettingsFragment
+				.findPreference("resource");
+		if (resources != null) {
+			ArrayList<CharSequence> entries = new ArrayList<CharSequence>(
+					Arrays.asList(resources.getEntries()));
+			entries.add(0, Build.MODEL);
+			resources.setEntries(entries.toArray(new CharSequence[entries
+					.size()]));
+			resources.setEntryValues(entries.toArray(new CharSequence[entries
+					.size()]));
+		}
+	}
+
+	@Override
+	public void onStop() {
+		super.onStop();
+		PreferenceManager.getDefaultSharedPreferences(this)
+				.unregisterOnSharedPreferenceChangeListener(this);
+	}
+
+	@Override
+	public void onSharedPreferenceChanged(SharedPreferences preferences,
+			String name) {
+        // need to synchronize the settings class first
+        Settings.synchronizeSettingsClassWithPreferences(getPreferences(), name);
+        switch (name) {
+            case "resource":
+                String resource = preferences.getString("resource", "mobile")
+                        .toLowerCase(Locale.US);
+                if (xmppConnectionServiceBound) {
+                    for (Account account : xmppConnectionService.getAccounts()) {
+                        account.setResource(resource);
+                        if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+                            xmppConnectionService.reconnectAccountInBackground(account);
+                        }
+                    }
+                }
+                break;
+            case "keep_foreground_service":
+                xmppConnectionService.toggleForegroundService();
+                break;
+			case "confirm_messages_list":
+				if (xmppConnectionServiceBound) {
+					for (Account account : xmppConnectionService.getAccounts()) {
+						if (!account.isOptionSet(Account.OPTION_DISABLED)) {
+							xmppConnectionService.sendPresence(account);
+						}
+					}
+				}
+				break;
+        }
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/SettingsFragment.java b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsFragment.java
new file mode 100644
index 00000000..a549ff94
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/SettingsFragment.java
@@ -0,0 +1,65 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.Dialog;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+
+import de.thedevstack.conversationsplus.R;
+
+public class SettingsFragment extends PreferenceFragment {
+
+	//http://stackoverflow.com/questions/16374820/action-bar-home-button-not-functional-with-nested-preferencescreen/16800527#16800527
+	private void initializeActionBar(PreferenceScreen preferenceScreen) {
+		final Dialog dialog = preferenceScreen.getDialog();
+
+		if (dialog != null) {
+			View homeBtn = dialog.findViewById(android.R.id.home);
+
+			if (homeBtn != null) {
+				View.OnClickListener dismissDialogClickListener = new View.OnClickListener() {
+					@Override
+					public void onClick(View v) {
+						dialog.dismiss();
+					}
+				};
+
+				ViewParent homeBtnContainer = homeBtn.getParent();
+
+				if (homeBtnContainer instanceof FrameLayout) {
+					ViewGroup containerParent = (ViewGroup) homeBtnContainer.getParent();
+					if (containerParent instanceof LinearLayout) {
+						((LinearLayout) containerParent).setOnClickListener(dismissDialogClickListener);
+					} else {
+						((FrameLayout) homeBtnContainer).setOnClickListener(dismissDialogClickListener);
+					}
+				} else {
+					homeBtn.setOnClickListener(dismissDialogClickListener);
+				}
+			}
+		}
+	}
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		// Load the preferences from an XML resource
+		addPreferencesFromResource(R.xml.preferences);
+	}
+
+	@Override
+	public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
+		super.onPreferenceTreeClick(preferenceScreen, preference);
+		if (preference instanceof PreferenceScreen) {
+			initializeActionBar((PreferenceScreen) preference);
+		}
+		return false;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java
new file mode 100644
index 00000000..f6a7b4c5
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/ShareWithActivity.java
@@ -0,0 +1,219 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ListView;
+import android.widget.Toast;
+
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.ui.adapter.ConversationAdapter;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class ShareWithActivity extends XmppActivity {
+
+	private class Share {
+		public Uri uri;
+		public boolean image;
+		public String account;
+		public String contact;
+		public String text;
+	}
+
+	private Share share;
+
+	private static final int REQUEST_START_NEW_CONVERSATION = 0x0501;
+	private ListView mListView;
+	private List<Conversation> mConversations = new ArrayList<>();
+
+	private UiCallback<Message> attachFileCallback = new UiCallback<Message>() {
+
+		@Override
+		public void userInputRequried(PendingIntent pi, Message object) {
+			// TODO Auto-generated method stub
+
+		}
+
+		@Override
+		public void success(Message message) {
+			xmppConnectionService.sendMessage(message);
+		}
+
+		@Override
+		public void error(int errorCode, Message object) {
+			// TODO Auto-generated method stub
+
+		}
+	};
+
+	protected void onActivityResult(int requestCode, int resultCode,
+			final Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (requestCode == REQUEST_START_NEW_CONVERSATION
+				&& resultCode == RESULT_OK) {
+			share.contact = data.getStringExtra("contact");
+			share.account = data.getStringExtra("account");
+			Log.d(Config.LOGTAG, "contact: " + share.contact + " account:"
+					+ share.account);
+		}
+		if (xmppConnectionServiceBound && share != null
+				&& share.contact != null && share.account != null) {
+			share();
+		}
+	}
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		if (getActionBar() != null) {
+			getActionBar().setDisplayHomeAsUpEnabled(false);
+			getActionBar().setHomeButtonEnabled(false);
+		}
+
+		setContentView(R.layout.share_with);
+		setTitle(getString(R.string.title_activity_sharewith));
+
+		mListView = (ListView) findViewById(R.id.choose_conversation_list);
+		ConversationAdapter mAdapter = new ConversationAdapter(this,
+				this.mConversations);
+		mListView.setAdapter(mAdapter);
+		mListView.setOnItemClickListener(new OnItemClickListener() {
+
+			@Override
+			public void onItemClick(AdapterView<?> arg0, View arg1,
+					int position, long arg3) {
+				Conversation conversation = mConversations.get(position);
+				if (conversation.getMode() == Conversation.MODE_SINGLE
+						|| share.uri == null) {
+					share(mConversations.get(position));
+				}
+			}
+		});
+
+		this.share = new Share();
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		getMenuInflater().inflate(R.menu.share_with, menu);
+		return true;
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		switch (item.getItemId()) {
+		case R.id.action_add:
+			final Intent intent = new Intent(getApplicationContext(),
+					ChooseContactActivity.class);
+			startActivityForResult(intent, REQUEST_START_NEW_CONVERSATION);
+			return true;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	public void onStart() {
+		final String type = getIntent().getType();
+		final Uri uri = getIntent().getParcelableExtra(Intent.EXTRA_STREAM);
+		if (type != null && uri != null && !type.equalsIgnoreCase("text/plain")) {
+			this.share.uri = uri;
+			this.share.image = type.startsWith("image/") || isImage(uri);
+		} else {
+			this.share.text = getIntent().getStringExtra(Intent.EXTRA_TEXT);
+		}
+		if (xmppConnectionServiceBound) {
+			xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uri == null);
+		}
+		super.onStart();
+	}
+
+	protected boolean isImage(Uri uri) {
+		try {
+			String guess = URLConnection.guessContentTypeFromName(uri.toString());
+			return (guess != null && guess.startsWith("image/"));
+		} catch (final StringIndexOutOfBoundsException ignored) {
+			return false;
+		}
+	}
+
+	@Override
+	void onBackendConnected() {
+		if (xmppConnectionServiceBound && share != null
+				&& share.contact != null && share.account != null) {
+			share();
+			return;
+		}
+		xmppConnectionService.populateWithOrderedConversations(mConversations,
+				this.share != null && this.share.uri == null);
+	}
+
+	private void share() {
+        Account account;
+        try {
+            account = xmppConnectionService.findAccountByJid(Jid.fromString(share.account));
+        } catch (final InvalidJidException e) {
+            account = null;
+        }
+        if (account == null) {
+			return;
+		}
+        final Conversation conversation;
+        try {
+            conversation = xmppConnectionService
+                    .findOrCreateConversation(account, Jid.fromString(share.contact), false);
+        } catch (final InvalidJidException e) {
+            return;
+        }
+        share(conversation);
+	}
+
+	private void share(final Conversation conversation) {
+		if (share.uri != null) {
+			selectPresence(conversation, new OnPresenceSelected() {
+				@Override
+				public void onPresenceSelected() {
+					if (share.image) {
+						Toast.makeText(getApplicationContext(),
+								getText(R.string.preparing_image),
+								Toast.LENGTH_LONG).show();
+						ShareWithActivity.this.xmppConnectionService
+							.attachImageToConversation(conversation, share.uri,
+									attachFileCallback);
+					} else {
+						Toast.makeText(getApplicationContext(),
+								getText(R.string.preparing_file),
+								Toast.LENGTH_LONG).show();
+						ShareWithActivity.this.xmppConnectionService
+							.attachFileToConversation(conversation, share.uri,
+									attachFileCallback);
+					}
+					switchToConversation(conversation, null, true);
+					finish();
+				}
+			});
+
+		} else {
+			switchToConversation(conversation, this.share.text, true);
+			finish();
+		}
+
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
new file mode 100644
index 00000000..c0500375
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
@@ -0,0 +1,819 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
+import android.app.ActionBar;
+import android.app.ActionBar.Tab;
+import android.app.ActionBar.TabListener;
+import android.app.AlertDialog;
+import android.app.Fragment;
+import android.app.FragmentTransaction;
+import android.app.ListFragment;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.net.Uri;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.support.v13.app.FragmentPagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.util.Log;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.KeyEvent;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AdapterView;
+import android.widget.AdapterView.AdapterContextMenuInfo;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.AutoCompleteTextView;
+import android.widget.CheckBox;
+import android.widget.Checkable;
+import android.widget.EditText;
+import android.widget.ListView;
+import android.widget.Spinner;
+
+import com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentResult;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Blockable;
+import de.thedevstack.conversationsplus.entities.Bookmark;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.OnRosterUpdate;
+import de.thedevstack.conversationsplus.ui.adapter.KnownHostsAdapter;
+import de.thedevstack.conversationsplus.ui.adapter.ListItemAdapter;
+import de.thedevstack.conversationsplus.utils.XmppUri;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class StartConversationActivity extends XmppActivity implements OnRosterUpdate, OnUpdateBlocklist {
+
+	public int conference_context_id;
+	public int contact_context_id;
+	private Tab mContactsTab;
+	private Tab mConferencesTab;
+	private ViewPager mViewPager;
+	private MyListFragment mContactsListFragment = new MyListFragment();
+	private List<ListItem> contacts = new ArrayList<>();
+	private ArrayAdapter<ListItem> mContactsAdapter;
+	private MyListFragment mConferenceListFragment = new MyListFragment();
+	private List<ListItem> conferences = new ArrayList<ListItem>();
+	private ArrayAdapter<ListItem> mConferenceAdapter;
+	private List<String> mActivatedAccounts = new ArrayList<String>();
+	private List<String> mKnownHosts;
+	private List<String> mKnownConferenceHosts;
+	private Invite mPendingInvite = null;
+	private Menu mOptionsMenu;
+	private EditText mSearchEditText;
+	private MenuItem.OnActionExpandListener mOnActionExpandListener = new MenuItem.OnActionExpandListener() {
+
+		@Override
+		public boolean onMenuItemActionExpand(MenuItem item) {
+			mSearchEditText.post(new Runnable() {
+
+				@Override
+				public void run() {
+					mSearchEditText.requestFocus();
+					InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+					imm.showSoftInput(mSearchEditText,
+							InputMethodManager.SHOW_IMPLICIT);
+				}
+			});
+
+			return true;
+		}
+
+		@Override
+		public boolean onMenuItemActionCollapse(MenuItem item) {
+			InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+			imm.hideSoftInputFromWindow(mSearchEditText.getWindowToken(),
+					InputMethodManager.HIDE_IMPLICIT_ONLY);
+			mSearchEditText.setText("");
+			filter(null);
+			return true;
+		}
+	};
+	private boolean mHideOfflineContacts = false;
+	private TabListener mTabListener = new TabListener() {
+
+		@Override
+		public void onTabUnselected(Tab tab, FragmentTransaction ft) {
+			return;
+		}
+
+		@Override
+		public void onTabSelected(Tab tab, FragmentTransaction ft) {
+			mViewPager.setCurrentItem(tab.getPosition());
+			onTabChanged();
+		}
+
+		@Override
+		public void onTabReselected(Tab tab, FragmentTransaction ft) {
+			return;
+		}
+	};
+	private ViewPager.SimpleOnPageChangeListener mOnPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
+		@Override
+		public void onPageSelected(int position) {
+			if (getActionBar() != null) {
+				getActionBar().setSelectedNavigationItem(position);
+			}
+			onTabChanged();
+		}
+	};
+	private TextWatcher mSearchTextWatcher = new TextWatcher() {
+
+		@Override
+		public void afterTextChanged(Editable editable) {
+			filter(editable.toString());
+		}
+
+		@Override
+		public void beforeTextChanged(CharSequence s, int start, int count,
+				int after) {
+		}
+
+		@Override
+		public void onTextChanged(CharSequence s, int start, int before,
+				int count) {
+		}
+	};
+	private MenuItem mMenuSearchView;
+	private ListItemAdapter.OnTagClickedListener mOnTagClickedListener = new ListItemAdapter.OnTagClickedListener() {
+		@Override
+		public void onTagClicked(String tag) {
+			if (mMenuSearchView != null) {
+				mMenuSearchView.expandActionView();
+				mSearchEditText.setText("");
+				mSearchEditText.append(tag);
+				filter(tag);
+			}
+		}
+	};
+	private String mInitialJid;
+
+	@Override
+	public void onRosterUpdate() {
+		this.refreshUi();
+	}
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_start_conversation);
+		mViewPager = (ViewPager) findViewById(R.id.start_conversation_view_pager);
+		ActionBar actionBar = getActionBar();
+		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
+
+		mContactsTab = actionBar.newTab().setText(R.string.contacts)
+			.setTabListener(mTabListener);
+		mConferencesTab = actionBar.newTab().setText(R.string.conferences)
+			.setTabListener(mTabListener);
+		actionBar.addTab(mContactsTab);
+		actionBar.addTab(mConferencesTab);
+
+		mViewPager.setOnPageChangeListener(mOnPageChangeListener);
+		mViewPager.setAdapter(new FragmentPagerAdapter(getFragmentManager()) {
+
+			@Override
+			public int getCount() {
+				return 2;
+			}
+
+			@Override
+			public Fragment getItem(int position) {
+				if (position == 0) {
+					return mContactsListFragment;
+				} else {
+					return mConferenceListFragment;
+				}
+			}
+		});
+
+		mConferenceAdapter = new ListItemAdapter(this, conferences);
+		mConferenceListFragment.setListAdapter(mConferenceAdapter);
+		mConferenceListFragment.setContextMenu(R.menu.conference_context);
+		mConferenceListFragment
+			.setOnListItemClickListener(new OnItemClickListener() {
+
+				@Override
+				public void onItemClick(AdapterView<?> arg0, View arg1,
+						int position, long arg3) {
+					openConversationForBookmark(position);
+				}
+			});
+
+		mContactsAdapter = new ListItemAdapter(this, contacts);
+		((ListItemAdapter) mContactsAdapter).setOnTagClickedListener(this.mOnTagClickedListener);
+		mContactsListFragment.setListAdapter(mContactsAdapter);
+		mContactsListFragment.setContextMenu(R.menu.contact_context);
+		mContactsListFragment
+			.setOnListItemClickListener(new OnItemClickListener() {
+
+				@Override
+				public void onItemClick(AdapterView<?> arg0, View arg1,
+						int position, long arg3) {
+					openConversationForContact(position);
+				}
+			});
+
+		this.mHideOfflineContacts = getPreferences().getBoolean("hide_offline", false);
+
+	}
+
+	protected void openConversationForContact(int position) {
+		Contact contact = (Contact) contacts.get(position);
+		Conversation conversation = xmppConnectionService
+			.findOrCreateConversation(contact.getAccount(),
+					contact.getJid(), false);
+		switchToConversation(conversation);
+	}
+
+	protected void openConversationForContact() {
+		int position = contact_context_id;
+		openConversationForContact(position);
+	}
+
+	protected void openConversationForBookmark() {
+		openConversationForBookmark(conference_context_id);
+	}
+
+	protected void openConversationForBookmark(int position) {
+		Bookmark bookmark = (Bookmark) conferences.get(position);
+		Conversation conversation = xmppConnectionService
+			.findOrCreateConversation(bookmark.getAccount(),
+					bookmark.getJid(), true);
+		conversation.setBookmark(bookmark);
+		if (!conversation.getMucOptions().online()) {
+			xmppConnectionService.joinMuc(conversation);
+		}
+		if (!bookmark.autojoin()) {
+			bookmark.setAutojoin(true);
+			xmppConnectionService.pushBookmarks(bookmark.getAccount());
+		}
+		switchToConversation(conversation);
+	}
+
+	protected void openDetailsForContact() {
+		int position = contact_context_id;
+		Contact contact = (Contact) contacts.get(position);
+		switchToContactDetails(contact);
+	}
+
+	protected void toggleContactBlock() {
+		final int position = contact_context_id;
+		BlockContactDialog.show(this, xmppConnectionService, (Contact)contacts.get(position));
+	}
+
+	protected void deleteContact() {
+		final int position = contact_context_id;
+		final Contact contact = (Contact) contacts.get(position);
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setTitle(R.string.action_delete_contact);
+		builder.setMessage(getString(R.string.remove_contact_text,
+					contact.getJid()));
+		builder.setPositiveButton(R.string.delete, new OnClickListener() {
+
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				xmppConnectionService.deleteContactOnServer(contact);
+				filter(mSearchEditText.getText().toString());
+			}
+		});
+		builder.create().show();
+	}
+
+	protected void deleteConference() {
+		int position = conference_context_id;
+		final Bookmark bookmark = (Bookmark) conferences.get(position);
+
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setTitle(R.string.delete_bookmark);
+		builder.setMessage(getString(R.string.remove_bookmark_text,
+					bookmark.getJid()));
+		builder.setPositiveButton(R.string.delete, new OnClickListener() {
+
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				bookmark.unregisterConversation();
+				Account account = bookmark.getAccount();
+				account.getBookmarks().remove(bookmark);
+				xmppConnectionService.pushBookmarks(account);
+				filter(mSearchEditText.getText().toString());
+			}
+		});
+		builder.create().show();
+
+	}
+
+	@SuppressLint("InflateParams")
+	protected void showCreateContactDialog(final String prefilledJid, final String fingerprint) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.create_contact);
+		View dialogView = getLayoutInflater().inflate(R.layout.create_contact_dialog, null);
+		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
+		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
+		jid.setAdapter(new KnownHostsAdapter(this,android.R.layout.simple_list_item_1, mKnownHosts));
+		if (prefilledJid != null) {
+			jid.append(prefilledJid);
+			if (fingerprint!=null) {
+				jid.setFocusable(false);
+				jid.setFocusableInTouchMode(false);
+				jid.setClickable(false);
+				jid.setCursorVisible(false);
+			}
+		}
+		populateAccountSpinner(spinner);
+		builder.setView(dialogView);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.create, null);
+		final AlertDialog dialog = builder.create();
+		dialog.show();
+		dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(
+				new View.OnClickListener() {
+
+					@Override
+					public void onClick(final View v) {
+						if (!xmppConnectionServiceBound) {
+							return;
+						}
+						final Jid accountJid;
+						try {
+							accountJid = Jid.fromString((String) spinner.getSelectedItem());
+						} catch (final InvalidJidException e) {
+							return;
+						}
+						final Jid contactJid;
+						try {
+							contactJid = Jid.fromString(jid.getText().toString());
+						} catch (final InvalidJidException e) {
+							jid.setError(getString(R.string.invalid_jid));
+							return;
+						}
+						final Account account = xmppConnectionService
+							.findAccountByJid(accountJid);
+						if (account == null) {
+							dialog.dismiss();
+							return;
+						}
+						final Contact contact = account.getRoster().getContact(contactJid);
+						if (contact.showInRoster()) {
+							jid.setError(getString(R.string.contact_already_exists));
+						} else {
+							contact.addOtrFingerprint(fingerprint);
+							xmppConnectionService.createContact(contact);
+							dialog.dismiss();
+							switchToConversation(contact);
+						}
+					}
+				});
+
+	}
+
+	@SuppressLint("InflateParams")
+	protected void showJoinConferenceDialog(final String prefilledJid) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.join_conference);
+		final View dialogView = getLayoutInflater().inflate(R.layout.join_conference_dialog, null);
+		final Spinner spinner = (Spinner) dialogView.findViewById(R.id.account);
+		final AutoCompleteTextView jid = (AutoCompleteTextView) dialogView.findViewById(R.id.jid);
+		jid.setAdapter(new KnownHostsAdapter(this,android.R.layout.simple_list_item_1, mKnownConferenceHosts));
+		if (prefilledJid != null) {
+			jid.append(prefilledJid);
+		}
+		populateAccountSpinner(spinner);
+		final Checkable bookmarkCheckBox = (CheckBox) dialogView
+			.findViewById(R.id.bookmark);
+		builder.setView(dialogView);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.join, null);
+		final AlertDialog dialog = builder.create();
+		dialog.show();
+		dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(
+				new View.OnClickListener() {
+
+					@Override
+					public void onClick(final View v) {
+						if (!xmppConnectionServiceBound) {
+							return;
+						}
+						final Jid accountJid;
+						try {
+							accountJid = Jid.fromString((String) spinner.getSelectedItem());
+						} catch (final InvalidJidException e) {
+							return;
+						}
+						final Jid conferenceJid;
+						try {
+							conferenceJid = Jid.fromString(jid.getText().toString());
+						} catch (final InvalidJidException e) {
+							jid.setError(getString(R.string.invalid_jid));
+							return;
+						}
+						final Account account = xmppConnectionService
+							.findAccountByJid(accountJid);
+						if (account == null) {
+							dialog.dismiss();
+							return;
+						}
+						if (bookmarkCheckBox.isChecked()) {
+							if (account.hasBookmarkFor(conferenceJid)) {
+								jid.setError(getString(R.string.bookmark_already_exists));
+							} else {
+								final Bookmark bookmark = new Bookmark(account,conferenceJid.toBareJid());
+								bookmark.setAutojoin(true);
+								account.getBookmarks().add(bookmark);
+								xmppConnectionService
+									.pushBookmarks(account);
+								final Conversation conversation = xmppConnectionService
+									.findOrCreateConversation(account,
+											conferenceJid, true);
+								conversation.setBookmark(bookmark);
+								if (!conversation.getMucOptions().online()) {
+									xmppConnectionService
+										.joinMuc(conversation);
+								}
+								dialog.dismiss();
+								switchToConversation(conversation);
+							}
+						} else {
+							final Conversation conversation = xmppConnectionService
+								.findOrCreateConversation(account,
+										conferenceJid, true);
+							if (!conversation.getMucOptions().online()) {
+								xmppConnectionService.joinMuc(conversation);
+							}
+							dialog.dismiss();
+							switchToConversation(conversation);
+						}
+					}
+				});
+	}
+
+	protected void switchToConversation(Contact contact) {
+		Conversation conversation = xmppConnectionService
+			.findOrCreateConversation(contact.getAccount(),
+					contact.getJid(), false);
+		switchToConversation(conversation);
+	}
+
+	private void populateAccountSpinner(Spinner spinner) {
+		ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
+				android.R.layout.simple_spinner_item, mActivatedAccounts);
+		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+		spinner.setAdapter(adapter);
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		this.mOptionsMenu = menu;
+		getMenuInflater().inflate(R.menu.start_conversation, menu);
+		MenuItem menuCreateContact = menu.findItem(R.id.action_create_contact);
+		MenuItem menuCreateConference = menu.findItem(R.id.action_join_conference);
+		MenuItem menuHideOffline = menu.findItem(R.id.action_hide_offline);
+		menuHideOffline.setChecked(this.mHideOfflineContacts);
+		mMenuSearchView = menu.findItem(R.id.action_search);
+		mMenuSearchView.setOnActionExpandListener(mOnActionExpandListener);
+		View mSearchView = mMenuSearchView.getActionView();
+		mSearchEditText = (EditText) mSearchView
+			.findViewById(R.id.search_field);
+		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
+		if (getActionBar().getSelectedNavigationIndex() == 0) {
+			menuCreateConference.setVisible(false);
+		} else {
+			menuCreateContact.setVisible(false);
+		}
+		if (mInitialJid != null) {
+			mMenuSearchView.expandActionView();
+			mSearchEditText.append(mInitialJid);
+			filter(mInitialJid);
+		}
+		return true;
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.action_create_contact:
+				showCreateContactDialog(null,null);
+				return true;
+			case R.id.action_join_conference:
+				showJoinConferenceDialog(null);
+				return true;
+			case R.id.action_scan_qr_code:
+				new IntentIntegrator(this).initiateScan();
+				return true;
+			case R.id.action_hide_offline:
+				mHideOfflineContacts = !item.isChecked();
+				getPreferences().edit().putBoolean("hide_offline", mHideOfflineContacts).commit();
+				if (mSearchEditText != null) {
+					filter(mSearchEditText.getText().toString());
+				}
+				invalidateOptionsMenu();
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	public boolean onKeyUp(int keyCode, KeyEvent event) {
+		if (keyCode == KeyEvent.KEYCODE_SEARCH && !event.isLongPress()) {
+			mOptionsMenu.findItem(R.id.action_search).expandActionView();
+			return true;
+		}
+		return super.onKeyUp(keyCode, event);
+	}
+
+	@Override
+	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+		if ((requestCode & 0xFFFF) == IntentIntegrator.REQUEST_CODE) {
+			IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
+			if (scanResult != null && scanResult.getFormatName() != null) {
+				String data = scanResult.getContents();
+				Invite invite = new Invite(data);
+				if (xmppConnectionServiceBound) {
+					invite.invite();
+				} else if (invite.getJid() != null) {
+					this.mPendingInvite = invite;
+				} else {
+					this.mPendingInvite = null;
+				}
+			}
+		}
+		super.onActivityResult(requestCode, requestCode, intent);
+	}
+
+	@Override
+	protected void onBackendConnected() {
+		this.mActivatedAccounts.clear();
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (account.getStatus() != Account.State.DISABLED) {
+				this.mActivatedAccounts.add(account.getJid().toBareJid().toString());
+			}
+		}
+		final Intent intent = getIntent();
+		final ActionBar ab = getActionBar();
+		if (intent != null && intent.getBooleanExtra("init",false) && ab != null) {
+			ab.setDisplayShowHomeEnabled(false);
+			ab.setDisplayHomeAsUpEnabled(false);
+			ab.setHomeButtonEnabled(false);
+		}
+		this.mKnownHosts = xmppConnectionService.getKnownHosts();
+		this.mKnownConferenceHosts = xmppConnectionService.getKnownConferenceHosts();
+		if (this.mPendingInvite != null) {
+			mPendingInvite.invite();
+			this.mPendingInvite = null;
+		} else if (!handleIntent(getIntent())) {
+			if (mSearchEditText != null) {
+				filter(mSearchEditText.getText().toString());
+			} else {
+				filter(null);
+			}
+		}
+		setIntent(null);
+	}
+
+	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+	Invite getInviteJellyBean(NdefRecord record) {
+		return new Invite(record.toUri());
+	}
+
+	protected boolean handleIntent(Intent intent) {
+		if (intent == null || intent.getAction() == null) {
+			return false;
+		}
+		switch (intent.getAction()) {
+			case Intent.ACTION_SENDTO:
+			case Intent.ACTION_VIEW:
+				Log.d(Config.LOGTAG, "received uri=" + intent.getData());
+				return new Invite(intent.getData()).invite();
+			case NfcAdapter.ACTION_NDEF_DISCOVERED:
+				for (Parcelable message : getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)) {
+					if (message instanceof NdefMessage) {
+						Log.d(Config.LOGTAG, "received message=" + message);
+						for (NdefRecord record : ((NdefMessage) message).getRecords()) {
+							switch (record.getTnf()) {
+								case NdefRecord.TNF_WELL_KNOWN:
+									if (Arrays.equals(record.getType(), NdefRecord.RTD_URI)) {
+										if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+											return getInviteJellyBean(record).invite();
+										} else {
+											byte[] payload = record.getPayload();
+											if (payload[0] == 0) {
+												return new Invite(Uri.parse(new String(Arrays.copyOfRange(
+																	payload, 1, payload.length)))).invite();
+											}
+										}
+									}
+							}
+						}
+					}
+				}
+		}
+		return false;
+	}
+
+	private boolean handleJid(Invite invite) {
+		List<Contact> contacts = xmppConnectionService.findContacts(invite.getJid());
+		if (contacts.size() == 0) {
+			showCreateContactDialog(invite.getJid().toString(),invite.getFingerprint());
+			return false;
+		} else if (contacts.size() == 1) {
+			Contact contact = contacts.get(0);
+			if (invite.getFingerprint() != null) {
+				if (contact.addOtrFingerprint(invite.getFingerprint())) {
+					Log.d(Config.LOGTAG,"added new fingerprint");
+					xmppConnectionService.syncRosterToDisk(contact.getAccount());
+				}
+			}
+			switchToConversation(contact);
+			return true;
+		} else {
+			if (mMenuSearchView != null) {
+				mMenuSearchView.expandActionView();
+				mSearchEditText.setText("");
+				mSearchEditText.append(invite.getJid().toString());
+				filter(invite.getJid().toString());
+			} else {
+				mInitialJid = invite.getJid().toString();
+			}
+			return true;
+		}
+	}
+
+	protected void filter(String needle) {
+		if (xmppConnectionServiceBound) {
+			this.filterContacts(needle);
+			this.filterConferences(needle);
+		}
+	}
+
+	protected void filterContacts(String needle) {
+		this.contacts.clear();
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (account.getStatus() != Account.State.DISABLED) {
+				for (Contact contact : account.getRoster().getContacts()) {
+					if (contact.showInRoster() && contact.match(needle)
+							&& (!this.mHideOfflineContacts
+							|| contact.getPresences().getMostAvailableStatus() < Presences.OFFLINE)) {
+						this.contacts.add(contact);
+					}
+				}
+			}
+		}
+		Collections.sort(this.contacts);
+		mContactsAdapter.notifyDataSetChanged();
+	}
+
+	protected void filterConferences(String needle) {
+		this.conferences.clear();
+		for (Account account : xmppConnectionService.getAccounts()) {
+			if (account.getStatus() != Account.State.DISABLED) {
+				for (Bookmark bookmark : account.getBookmarks()) {
+					if (bookmark.match(needle)) {
+						this.conferences.add(bookmark);
+					}
+				}
+			}
+		}
+		Collections.sort(this.conferences);
+		mConferenceAdapter.notifyDataSetChanged();
+	}
+
+	private void onTabChanged() {
+		invalidateOptionsMenu();
+	}
+
+	@Override
+	public void OnUpdateBlocklist(final Status status) {
+		refreshUi();
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		if (mSearchEditText != null) {
+			filter(mSearchEditText.getText().toString());
+		}
+	}
+
+	public static class MyListFragment extends ListFragment {
+		private AdapterView.OnItemClickListener mOnItemClickListener;
+		private int mResContextMenu;
+
+		public void setContextMenu(final int res) {
+			this.mResContextMenu = res;
+		}
+
+		@Override
+		public void onListItemClick(final ListView l, final View v, final int position, final long id) {
+			if (mOnItemClickListener != null) {
+				mOnItemClickListener.onItemClick(l, v, position, id);
+			}
+		}
+
+		public void setOnListItemClickListener(AdapterView.OnItemClickListener l) {
+			this.mOnItemClickListener = l;
+		}
+
+		@Override
+		public void onViewCreated(final View view, final Bundle savedInstanceState) {
+			super.onViewCreated(view, savedInstanceState);
+			registerForContextMenu(getListView());
+			getListView().setFastScrollEnabled(true);
+		}
+
+		@Override
+		public void onCreateContextMenu(final ContextMenu menu, final View v,
+				final ContextMenuInfo menuInfo) {
+			super.onCreateContextMenu(menu, v, menuInfo);
+			final StartConversationActivity activity = (StartConversationActivity) getActivity();
+			activity.getMenuInflater().inflate(mResContextMenu, menu);
+			final AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
+			if (mResContextMenu == R.menu.conference_context) {
+				activity.conference_context_id = acmi.position;
+			} else {
+				activity.contact_context_id = acmi.position;
+				final Blockable contact = (Contact) activity.contacts.get(acmi.position);
+
+				final MenuItem blockUnblockItem = menu.findItem(R.id.context_contact_block_unblock);
+				if (blockUnblockItem != null) {
+					if (contact.isBlocked()) {
+						blockUnblockItem.setTitle(R.string.unblock_contact);
+					} else {
+						blockUnblockItem.setTitle(R.string.block_contact);
+					}
+				}
+			}
+		}
+
+		@Override
+		public boolean onContextItemSelected(final MenuItem item) {
+			StartConversationActivity activity = (StartConversationActivity) getActivity();
+			switch (item.getItemId()) {
+				case R.id.context_start_conversation:
+					activity.openConversationForContact();
+					break;
+				case R.id.context_contact_details:
+					activity.openDetailsForContact();
+					break;
+				case R.id.context_contact_block_unblock:
+					activity.toggleContactBlock();
+					break;
+				case R.id.context_delete_contact:
+					activity.deleteContact();
+					break;
+				case R.id.context_join_conference:
+					activity.openConversationForBookmark();
+					break;
+				case R.id.context_delete_conference:
+					activity.deleteConference();
+			}
+			return true;
+		}
+	}
+
+	private class Invite extends XmppUri {
+
+		public Invite(final Uri uri) {
+			super(uri);
+		}
+
+		public Invite(final String uri) {
+			super(uri);
+		}
+
+		boolean invite() {
+			if (jid != null) {
+				if (muc) {
+					showJoinConferenceDialog(jid);
+				} else {
+					return handleJid(this);
+				}
+			}
+			return false;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/TimePreference.java b/src/main/java/de/thedevstack/conversationsplus/ui/TimePreference.java
new file mode 100644
index 00000000..bfe7c8f4
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/TimePreference.java
@@ -0,0 +1,105 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.preference.DialogPreference;
+import android.preference.Preference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.TimePicker;
+
+import java.text.DateFormat;
+import java.util.Calendar;
+import java.util.Date;
+
+public class TimePreference extends DialogPreference implements Preference.OnPreferenceChangeListener {
+	private TimePicker picker = null;
+	public final static long DEFAULT_VALUE = 0;
+
+	public TimePreference(final Context context, final AttributeSet attrs) {
+		super(context, attrs, 0);
+		this.setOnPreferenceChangeListener(this);
+	}
+
+	protected void setTime(final long time) {
+		persistLong(time);
+		notifyDependencyChange(shouldDisableDependents());
+		notifyChanged();
+	}
+
+	protected void updateSummary(final long time) {
+		final DateFormat dateFormat = android.text.format.DateFormat.getTimeFormat(getContext());
+		final Date date = new Date(time);
+		setSummary(dateFormat.format(date.getTime()));
+	}
+
+	@Override
+	protected View onCreateDialogView() {
+		picker = new TimePicker(getContext());
+		picker.setIs24HourView(android.text.format.DateFormat.is24HourFormat(getContext()));
+		return picker;
+	}
+
+	protected Calendar getPersistedTime() {
+		final Calendar c = Calendar.getInstance();
+		c.setTimeInMillis(getPersistedLong(DEFAULT_VALUE));
+
+		return c;
+	}
+
+	@SuppressWarnings("NullableProblems")
+	@Override
+	protected void onBindDialogView(final View v) {
+		super.onBindDialogView(v);
+		final Calendar c = getPersistedTime();
+
+		picker.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
+		picker.setCurrentMinute(c.get(Calendar.MINUTE));
+	}
+
+	@Override
+	protected void onDialogClosed(final boolean positiveResult) {
+		super.onDialogClosed(positiveResult);
+
+		if (positiveResult) {
+			final Calendar c = Calendar.getInstance();
+			c.set(Calendar.MINUTE, picker.getCurrentMinute());
+			c.set(Calendar.HOUR_OF_DAY, picker.getCurrentHour());
+
+
+			if (!callChangeListener(c.getTimeInMillis())) {
+				return;
+			}
+
+			setTime(c.getTimeInMillis());
+		}
+	}
+
+	@Override
+	protected Object onGetDefaultValue(final TypedArray a, final int index) {
+		return a.getInteger(index, 0);
+	}
+
+	@Override
+	protected void onSetInitialValue(final boolean restorePersistedValue, final Object defaultValue) {
+		long time;
+		if (defaultValue == null) {
+			time = restorePersistedValue ? getPersistedLong(DEFAULT_VALUE) : DEFAULT_VALUE;
+		} else if (defaultValue instanceof Long) {
+			time = restorePersistedValue ? getPersistedLong((Long) defaultValue) : (Long) defaultValue;
+		} else if (defaultValue instanceof Calendar) {
+			time = restorePersistedValue ? getPersistedLong(((Calendar)defaultValue).getTimeInMillis()) : ((Calendar)defaultValue).getTimeInMillis();
+		} else {
+			time = restorePersistedValue ? getPersistedLong(DEFAULT_VALUE) : DEFAULT_VALUE;
+		}
+
+		setTime(time);
+		updateSummary(time);
+	}
+
+	@Override
+	public boolean onPreferenceChange(final Preference preference, final Object newValue) {
+		((TimePreference) preference).updateSummary((Long)newValue);
+		return true;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java b/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java
new file mode 100644
index 00000000..0d23d29e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/UiCallback.java
@@ -0,0 +1,11 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.PendingIntent;
+
+public interface UiCallback<T> {
+	public void success(T object);
+
+	public void error(int errorCode, T object);
+
+	public void userInputRequried(PendingIntent pi, T object);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java
new file mode 100644
index 00000000..9f867dd2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/VerifyOTRActivity.java
@@ -0,0 +1,446 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.app.ActionBar;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentResult;
+
+import net.java.otr4j.OtrException;
+import net.java.otr4j.session.Session;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.XmppUri;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class VerifyOTRActivity extends XmppActivity implements XmppConnectionService.OnConversationUpdate {
+
+	public static final String ACTION_VERIFY_CONTACT = "verify_contact";
+	public static final int MODE_SCAN_FINGERPRINT = - 0x0502;
+	public static final int MODE_ASK_QUESTION = 0x0503;
+	public static final int MODE_ANSWER_QUESTION = 0x0504;
+	public static final int MODE_MANUAL_VERIFICATION = 0x0505;
+
+	private LinearLayout mManualVerificationArea;
+	private LinearLayout mSmpVerificationArea;
+	private TextView mRemoteFingerprint;
+	private TextView mYourFingerprint;
+	private TextView mVerificationExplain;
+	private TextView mStatusMessage;
+	private TextView mSharedSecretHint;
+	private EditText mSharedSecretHintEditable;
+	private EditText mSharedSecretSecret;
+	private Button mLeftButton;
+	private Button mRightButton;
+	private Account mAccount;
+	private Conversation mConversation;
+	private int mode = MODE_MANUAL_VERIFICATION;
+	private XmppUri mPendingUri = null;
+
+	private DialogInterface.OnClickListener mVerifyFingerprintListener = new DialogInterface.OnClickListener() {
+
+		@Override
+		public void onClick(DialogInterface dialogInterface, int click) {
+			mConversation.verifyOtrFingerprint();
+			xmppConnectionService.syncRosterToDisk(mConversation.getAccount());
+			Toast.makeText(VerifyOTRActivity.this,R.string.verified,Toast.LENGTH_SHORT).show();
+			finish();
+		}
+	};
+
+	private View.OnClickListener mCreateSharedSecretListener = new View.OnClickListener() {
+		@Override
+		public void onClick(final View view) {
+			if (isAccountOnline()) {
+				final String question = mSharedSecretHintEditable.getText().toString();
+				final String secret = mSharedSecretSecret.getText().toString();
+				if (question.trim().isEmpty()) {
+					mSharedSecretHintEditable.requestFocus();
+					mSharedSecretHintEditable.setError(getString(R.string.shared_secret_hint_should_not_be_empty));
+				} else if (secret.trim().isEmpty()) {
+					mSharedSecretSecret.requestFocus();
+					mSharedSecretSecret.setError(getString(R.string.shared_secret_can_not_be_empty));
+				} else {
+					mSharedSecretSecret.setError(null);
+					mSharedSecretHintEditable.setError(null);
+					initSmp(question, secret);
+					updateView();
+				}
+			}
+		}
+	};
+	private View.OnClickListener mCancelSharedSecretListener = new View.OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			if (isAccountOnline()) {
+				abortSmp();
+				updateView();
+			}
+		}
+	};
+	private View.OnClickListener mRespondSharedSecretListener = new View.OnClickListener() {
+
+		@Override
+		public void onClick(View view) {
+			if (isAccountOnline()) {
+				final String question = mSharedSecretHintEditable.getText().toString();
+				final String secret = mSharedSecretSecret.getText().toString();
+				respondSmp(question, secret);
+				updateView();
+			}
+		}
+	};
+	private View.OnClickListener mRetrySharedSecretListener = new View.OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			mConversation.smp().status = Conversation.Smp.STATUS_NONE;
+			mConversation.smp().hint = null;
+			mConversation.smp().secret = null;
+			updateView();
+		}
+	};
+	private View.OnClickListener mFinishListener = new View.OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			mConversation.smp().status = Conversation.Smp.STATUS_NONE;
+			finish();
+		}
+	};
+
+	protected boolean initSmp(final String question, final String secret) {
+		final Session session = mConversation.getOtrSession();
+		if (session!=null) {
+			try {
+				session.initSmp(question, secret);
+				mConversation.smp().status = Conversation.Smp.STATUS_WE_REQUESTED;
+				mConversation.smp().secret = secret;
+				mConversation.smp().hint = question;
+				return true;
+			} catch (OtrException e) {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	protected boolean abortSmp() {
+		final Session session = mConversation.getOtrSession();
+		if (session!=null) {
+			try {
+				session.abortSmp();
+				mConversation.smp().status = Conversation.Smp.STATUS_NONE;
+				mConversation.smp().hint = null;
+				mConversation.smp().secret = null;
+				return true;
+			} catch (OtrException e) {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	protected boolean respondSmp(final String question, final String secret) {
+		final Session session = mConversation.getOtrSession();
+		if (session!=null) {
+			try {
+				session.respondSmp(question,secret);
+				return true;
+			} catch (OtrException e) {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
+
+	protected boolean verifyWithUri(XmppUri uri) {
+		Contact contact = mConversation.getContact();
+		if (this.mConversation.getContact().getJid().equals(uri.getJid()) && uri.getFingerprint() != null) {
+			contact.addOtrFingerprint(uri.getFingerprint());
+			Toast.makeText(this,R.string.verified,Toast.LENGTH_SHORT).show();
+			updateView();
+			xmppConnectionService.syncRosterToDisk(contact.getAccount());
+			return true;
+		} else {
+			Toast.makeText(this,R.string.could_not_verify_fingerprint,Toast.LENGTH_SHORT).show();
+			return false;
+		}
+	}
+
+	protected boolean isAccountOnline() {
+		if (this.mAccount.getStatus() != Account.State.ONLINE) {
+			Toast.makeText(this,R.string.not_connected_try_again,Toast.LENGTH_SHORT).show();
+			return false;
+		} else {
+			return true;
+		}
+	}
+
+	protected boolean handleIntent(Intent intent) {
+		if (intent != null && intent.getAction().equals(ACTION_VERIFY_CONTACT)) {
+			try {
+				this.mAccount = this.xmppConnectionService.findAccountByJid(Jid.fromString(intent.getExtras().getString("account")));
+			} catch (final InvalidJidException ignored) {
+				return false;
+			}
+			try {
+				this.mConversation = this.xmppConnectionService.find(this.mAccount,Jid.fromString(intent.getExtras().getString("contact")));
+				if (this.mConversation == null) {
+					return false;
+				}
+			} catch (final InvalidJidException ignored) {
+				return false;
+			}
+			this.mode = intent.getIntExtra("mode", MODE_MANUAL_VERIFICATION);
+			if (this.mode == MODE_SCAN_FINGERPRINT) {
+				new IntentIntegrator(this).initiateScan();
+				return false;
+			}
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	@Override
+	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+		if ((requestCode & 0xFFFF) == IntentIntegrator.REQUEST_CODE) {
+			IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
+			if (scanResult != null && scanResult.getFormatName() != null) {
+				String data = scanResult.getContents();
+				XmppUri uri = new XmppUri(data);
+				if (xmppConnectionServiceBound) {
+					verifyWithUri(uri);
+					finish();
+				} else {
+					this.mPendingUri = uri;
+				}
+			} else {
+				finish();
+			}
+		}
+		super.onActivityResult(requestCode, requestCode, intent);
+	}
+
+	@Override
+	protected void onBackendConnected() {
+		if (handleIntent(getIntent())) {
+			updateView();
+		} else if (mPendingUri!=null) {
+			verifyWithUri(mPendingUri);
+			finish();
+			mPendingUri = null;
+		}
+		setIntent(null);
+	}
+
+	protected void updateView() {
+		if (this.mConversation.hasValidOtrSession()) {
+			final ActionBar actionBar = getActionBar();
+			this.mVerificationExplain.setText(R.string.no_otr_session_found);
+			invalidateOptionsMenu();
+			switch(this.mode) {
+				case MODE_ASK_QUESTION:
+					if (actionBar != null ) {
+						actionBar.setTitle(R.string.ask_question);
+					}
+					this.updateViewAskQuestion();
+					break;
+				case MODE_ANSWER_QUESTION:
+					if (actionBar != null ) {
+						actionBar.setTitle(R.string.smp_requested);
+					}
+					this.updateViewAnswerQuestion();
+					break;
+				case MODE_MANUAL_VERIFICATION:
+				default:
+					if (actionBar != null ) {
+						actionBar.setTitle(R.string.manually_verify);
+					}
+					this.updateViewManualVerification();
+					break;
+			}
+		} else {
+			this.mManualVerificationArea.setVisibility(View.GONE);
+			this.mSmpVerificationArea.setVisibility(View.GONE);
+		}
+	}
+
+	protected void updateViewManualVerification() {
+		this.mVerificationExplain.setText(R.string.manual_verification_explanation);
+		this.mManualVerificationArea.setVisibility(View.VISIBLE);
+		this.mSmpVerificationArea.setVisibility(View.GONE);
+		this.mYourFingerprint.setText(CryptoHelper.prettifyFingerprint(this.mAccount.getOtrFingerprint()));
+		this.mRemoteFingerprint.setText(CryptoHelper.prettifyFingerprint(this.mConversation.getOtrFingerprint()));
+		if (this.mConversation.isOtrFingerprintVerified()) {
+			deactivateButton(this.mRightButton,R.string.verified);
+			activateButton(this.mLeftButton,R.string.cancel,this.mFinishListener);
+		} else {
+			activateButton(this.mLeftButton,R.string.cancel,this.mFinishListener);
+			activateButton(this.mRightButton,R.string.verify, new View.OnClickListener() {
+				@Override
+				public void onClick(View view) {
+					showManuallyVerifyDialog();
+				}
+			});
+		}
+	}
+
+	protected void updateViewAskQuestion() {
+		this.mManualVerificationArea.setVisibility(View.GONE);
+		this.mSmpVerificationArea.setVisibility(View.VISIBLE);
+		this.mVerificationExplain.setText(R.string.smp_explain_question);
+		final int smpStatus = this.mConversation.smp().status;
+		switch (smpStatus) {
+			case Conversation.Smp.STATUS_WE_REQUESTED:
+				this.mStatusMessage.setVisibility(View.GONE);
+				this.mSharedSecretHintEditable.setVisibility(View.VISIBLE);
+				this.mSharedSecretSecret.setVisibility(View.VISIBLE);
+				this.mSharedSecretHintEditable.setText(this.mConversation.smp().hint);
+				this.mSharedSecretSecret.setText(this.mConversation.smp().secret);
+				this.activateButton(this.mLeftButton, R.string.cancel, this.mCancelSharedSecretListener);
+				this.deactivateButton(this.mRightButton, R.string.in_progress);
+				break;
+			case Conversation.Smp.STATUS_FAILED:
+				this.mStatusMessage.setVisibility(View.GONE);
+				this.mSharedSecretHintEditable.setVisibility(View.VISIBLE);
+				this.mSharedSecretSecret.setVisibility(View.VISIBLE);
+				this.mSharedSecretSecret.requestFocus();
+				this.mSharedSecretSecret.setError(getString(R.string.secrets_do_not_match));
+				this.deactivateButton(this.mLeftButton, R.string.cancel);
+				this.activateButton(this.mRightButton, R.string.try_again, this.mRetrySharedSecretListener);
+				break;
+			case Conversation.Smp.STATUS_VERIFIED:
+				this.mSharedSecretHintEditable.setText("");
+				this.mSharedSecretHintEditable.setVisibility(View.GONE);
+				this.mSharedSecretSecret.setText("");
+				this.mSharedSecretSecret.setVisibility(View.GONE);
+				this.mStatusMessage.setVisibility(View.VISIBLE);
+				this.deactivateButton(this.mLeftButton, R.string.cancel);
+				this.activateButton(this.mRightButton, R.string.finish, this.mFinishListener);
+				break;
+			default:
+				this.mStatusMessage.setVisibility(View.GONE);
+				this.mSharedSecretHintEditable.setVisibility(View.VISIBLE);
+				this.mSharedSecretSecret.setVisibility(View.VISIBLE);
+				this.activateButton(this.mLeftButton,R.string.cancel,this.mFinishListener);
+				this.activateButton(this.mRightButton, R.string.ask_question, this.mCreateSharedSecretListener);
+				break;
+		}
+	}
+
+	protected void updateViewAnswerQuestion() {
+		this.mManualVerificationArea.setVisibility(View.GONE);
+		this.mSmpVerificationArea.setVisibility(View.VISIBLE);
+		this.mVerificationExplain.setText(R.string.smp_explain_answer);
+		this.mSharedSecretHintEditable.setVisibility(View.GONE);
+		this.mSharedSecretHint.setVisibility(View.VISIBLE);
+		this.deactivateButton(this.mLeftButton, R.string.cancel);
+		final int smpStatus = this.mConversation.smp().status;
+		switch (smpStatus) {
+			case Conversation.Smp.STATUS_CONTACT_REQUESTED:
+				this.mStatusMessage.setVisibility(View.GONE);
+				this.mSharedSecretHint.setText(this.mConversation.smp().hint);
+				this.activateButton(this.mRightButton,R.string.respond,this.mRespondSharedSecretListener);
+				break;
+			case Conversation.Smp.STATUS_VERIFIED:
+				this.mSharedSecretHintEditable.setText("");
+				this.mSharedSecretHintEditable.setVisibility(View.GONE);
+				this.mSharedSecretHint.setVisibility(View.GONE);
+				this.mSharedSecretSecret.setText("");
+				this.mSharedSecretSecret.setVisibility(View.GONE);
+				this.mStatusMessage.setVisibility(View.VISIBLE);
+				this.activateButton(this.mRightButton, R.string.finish, this.mFinishListener);
+				break;
+			case Conversation.Smp.STATUS_FAILED:
+			default:
+				this.mSharedSecretSecret.requestFocus();
+				this.mSharedSecretSecret.setError(getString(R.string.secrets_do_not_match));
+				this.activateButton(this.mRightButton,R.string.finish,this.mFinishListener);
+				break;
+		}
+	}
+
+	protected void activateButton(Button button, int text, View.OnClickListener listener) {
+		button.setEnabled(true);
+		button.setTextColor(getPrimaryTextColor());
+		button.setText(text);
+		button.setOnClickListener(listener);
+	}
+
+	protected void deactivateButton(Button button, int text) {
+		button.setEnabled(false);
+		button.setTextColor(getSecondaryTextColor());
+		button.setText(text);
+		button.setOnClickListener(null);
+	}
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_verify_otr);
+		this.mRemoteFingerprint = (TextView) findViewById(R.id.remote_fingerprint);
+		this.mYourFingerprint = (TextView) findViewById(R.id.your_fingerprint);
+		this.mLeftButton = (Button) findViewById(R.id.left_button);
+		this.mRightButton = (Button) findViewById(R.id.right_button);
+		this.mVerificationExplain = (TextView) findViewById(R.id.verification_explanation);
+		this.mStatusMessage = (TextView) findViewById(R.id.status_message);
+		this.mSharedSecretSecret = (EditText) findViewById(R.id.shared_secret_secret);
+		this.mSharedSecretHintEditable = (EditText) findViewById(R.id.shared_secret_hint_editable);
+		this.mSharedSecretHint = (TextView) findViewById(R.id.shared_secret_hint);
+		this.mManualVerificationArea = (LinearLayout) findViewById(R.id.manual_verification_area);
+		this.mSmpVerificationArea = (LinearLayout) findViewById(R.id.smp_verification_area);
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		super.onCreateOptionsMenu(menu);
+		getMenuInflater().inflate(R.menu.verify_otr, menu);
+		return true;
+	}
+
+	private void showManuallyVerifyDialog() {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.manually_verify);
+		builder.setMessage(R.string.are_you_sure_verify_fingerprint);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.verify, mVerifyFingerprintListener);
+		builder.create().show();
+	}
+
+	@Override
+	protected String getShareableUri() {
+		if (mAccount!=null) {
+			return mAccount.getShareableUri();
+		} else {
+			return "";
+		}
+	}
+
+	public void onConversationUpdate() {
+		refreshUi();
+	}
+
+	@Override
+	protected void refreshUiReal() {
+		updateView();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java b/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java
new file mode 100644
index 00000000..6c1f0439
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/XmppActivity.java
@@ -0,0 +1,957 @@
+package de.thedevstack.conversationsplus.ui;
+
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
+import android.app.ActionBar;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.AlertDialog.Builder;
+import android.app.PendingIntent;
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.content.IntentSender.SendIntentException;
+import android.content.ServiceConnection;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.Point;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcEvent;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.SystemClock;
+import android.preference.PreferenceManager;
+import android.text.InputType;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.BitMatrix;
+import com.google.zxing.qrcode.QRCodeWriter;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
+import net.java.otr4j.session.SessionID;
+
+import java.io.FileNotFoundException;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.MucOptions;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.services.AvatarService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.services.XmppConnectionService.XmppConnectionBinder;
+import de.thedevstack.conversationsplus.utils.ExceptionHelper;
+import de.thedevstack.conversationsplus.xmpp.OnUpdateBlocklist;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public abstract class XmppActivity extends Activity {
+
+	protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
+	protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
+
+	public XmppConnectionService xmppConnectionService;
+	public boolean xmppConnectionServiceBound = false;
+	protected boolean registeredListeners = false;
+
+	protected int mPrimaryTextColor;
+	protected int mSecondaryTextColor;
+	protected int mSecondaryBackgroundColor;
+	protected int mColorRed;
+	protected int mColorOrange;
+	protected int mColorGreen;
+	protected int mPrimaryColor;
+
+	protected boolean mUseSubject = true;
+
+	private DisplayMetrics metrics;
+	protected int mTheme;
+	protected boolean mUsingEnterKey = false;
+
+	private long mLastUiRefresh = 0;
+	private Handler mRefreshUiHandler = new Handler();
+	private Runnable mRefreshUiRunnable = new Runnable() {
+		@Override
+		public void run() {
+			mLastUiRefresh = SystemClock.elapsedRealtime();
+			refreshUiReal();
+		}
+	};
+
+
+	protected void refreshUi() {
+		final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
+		if (diff > Config.REFRESH_UI_INTERVAL) {
+			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
+			runOnUiThread(mRefreshUiRunnable);
+		} else {
+			final long next = Config.REFRESH_UI_INTERVAL - diff;
+			mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
+			mRefreshUiHandler.postDelayed(mRefreshUiRunnable,next);
+		}
+	}
+
+	protected void refreshUiReal() {
+
+	};
+
+	protected interface OnValueEdited {
+		public void onValueEdited(String value);
+	}
+
+	public interface OnPresenceSelected {
+		public void onPresenceSelected();
+	}
+
+	protected ServiceConnection mConnection = new ServiceConnection() {
+
+		@Override
+		public void onServiceConnected(ComponentName className, IBinder service) {
+			XmppConnectionBinder binder = (XmppConnectionBinder) service;
+			xmppConnectionService = binder.getService();
+			xmppConnectionServiceBound = true;
+			if (!registeredListeners && shouldRegisterListeners()) {
+				registerListeners();
+				registeredListeners = true;
+			}
+			onBackendConnected();
+		}
+
+		@Override
+		public void onServiceDisconnected(ComponentName arg0) {
+			xmppConnectionServiceBound = false;
+		}
+	};
+
+	@Override
+	protected void onStart() {
+		super.onStart();
+		if (!xmppConnectionServiceBound) {
+			connectToBackend();
+		} else {
+			if (!registeredListeners) {
+				this.registerListeners();
+				this.registeredListeners = true;
+			}
+			this.onBackendConnected();
+		}
+	}
+
+	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
+	protected boolean shouldRegisterListeners() {
+		if  (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+			return !isDestroyed() && !isFinishing();
+		} else {
+			return !isFinishing();
+		}
+	}
+
+	public void connectToBackend() {
+		Intent intent = new Intent(this, XmppConnectionService.class);
+		intent.setAction("ui");
+		startService(intent);
+		bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
+	}
+
+	@Override
+	protected void onStop() {
+		super.onStop();
+		if (xmppConnectionServiceBound) {
+			if (registeredListeners) {
+				this.unregisterListeners();
+				this.registeredListeners = false;
+			}
+			unbindService(mConnection);
+			xmppConnectionServiceBound = false;
+		}
+	}
+
+	protected void hideKeyboard() {
+		InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+		View focus = getCurrentFocus();
+
+		if (focus != null) {
+
+			inputManager.hideSoftInputFromWindow(focus.getWindowToken(),
+					InputMethodManager.HIDE_NOT_ALWAYS);
+		}
+	}
+
+	public boolean hasPgp() {
+		return xmppConnectionService.getPgpEngine() != null;
+	}
+
+	public void showInstallPgpDialog() {
+		Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(getString(R.string.openkeychain_required));
+		builder.setIconAttribute(android.R.attr.alertDialogIcon);
+		builder.setMessage(getText(R.string.openkeychain_required_long));
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setNeutralButton(getString(R.string.restart),
+				new OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						if (xmppConnectionServiceBound) {
+							unbindService(mConnection);
+							xmppConnectionServiceBound = false;
+						}
+						stopService(new Intent(XmppActivity.this,
+									XmppConnectionService.class));
+						finish();
+					}
+				});
+		builder.setPositiveButton(getString(R.string.install),
+				new OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						Uri uri = Uri
+							.parse("market://details?id=org.sufficientlysecure.keychain");
+						Intent marketIntent = new Intent(Intent.ACTION_VIEW,
+								uri);
+						PackageManager manager = getApplicationContext()
+							.getPackageManager();
+						List<ResolveInfo> infos = manager
+							.queryIntentActivities(marketIntent, 0);
+						if (infos.size() > 0) {
+							startActivity(marketIntent);
+						} else {
+							uri = Uri.parse("http://www.openkeychain.org/");
+							Intent browserIntent = new Intent(
+									Intent.ACTION_VIEW, uri);
+							startActivity(browserIntent);
+						}
+						finish();
+					}
+				});
+		builder.create().show();
+	}
+
+	abstract void onBackendConnected();
+
+	protected void registerListeners() {
+		if (this instanceof XmppConnectionService.OnConversationUpdate) {
+			this.xmppConnectionService.setOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
+		}
+		if (this instanceof XmppConnectionService.OnAccountUpdate) {
+			this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
+		}
+		if (this instanceof XmppConnectionService.OnRosterUpdate) {
+			this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
+		}
+		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
+			this.xmppConnectionService.setOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
+		}
+		if (this instanceof OnUpdateBlocklist) {
+			this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
+		}
+	}
+
+	protected void unregisterListeners() {
+		if (this instanceof XmppConnectionService.OnConversationUpdate) {
+			this.xmppConnectionService.removeOnConversationListChangedListener();
+		}
+		if (this instanceof XmppConnectionService.OnAccountUpdate) {
+			this.xmppConnectionService.removeOnAccountListChangedListener();
+		}
+		if (this instanceof XmppConnectionService.OnRosterUpdate) {
+			this.xmppConnectionService.removeOnRosterUpdateListener();
+		}
+		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
+			this.xmppConnectionService.removeOnMucRosterUpdateListener();
+		}
+		if (this instanceof OnUpdateBlocklist) {
+			this.xmppConnectionService.removeOnUpdateBlocklistListener();
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
+		switch (item.getItemId()) {
+			case R.id.action_settings:
+				startActivity(new Intent(this, SettingsActivity.class));
+				break;
+			case R.id.action_accounts:
+				startActivity(new Intent(this, ManageAccountActivity.class));
+				break;
+			case android.R.id.home:
+				finish();
+				break;
+			case R.id.action_show_qr_code:
+				showQrCode();
+				break;
+		}
+		return super.onOptionsItemSelected(item);
+	}
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		metrics = getResources().getDisplayMetrics();
+		ExceptionHelper.init(getApplicationContext());
+		mPrimaryTextColor = getResources().getColor(R.color.primarytext);
+		mSecondaryTextColor = getResources().getColor(R.color.secondarytext);
+		mColorRed = getResources().getColor(R.color.red);
+		mColorOrange = getResources().getColor(R.color.orange);
+		mColorGreen = getResources().getColor(R.color.green);
+		mPrimaryColor = getResources().getColor(R.color.primary);
+		mSecondaryBackgroundColor = getResources().getColor(R.color.secondarybackground);
+		this.mTheme = findTheme();
+		setTheme(this.mTheme);
+		this.mUsingEnterKey = usingEnterKey();
+		mUseSubject = getPreferences().getBoolean("use_subject", true);
+		
+        Settings.initSettingsClassWithPreferences(getPreferences());
+		
+		final ActionBar ab = getActionBar();
+		if (ab!=null) {
+			ab.setDisplayHomeAsUpEnabled(true);
+		}
+	}
+
+	protected boolean usingEnterKey() {
+		return getPreferences().getBoolean("display_enter_key", false);
+	}
+
+	protected SharedPreferences getPreferences() {
+		return PreferenceManager
+			.getDefaultSharedPreferences(getApplicationContext());
+	}
+
+	public boolean useSubjectToIdentifyConference() {
+		return mUseSubject;
+	}
+
+	public void switchToConversation(Conversation conversation) {
+		switchToConversation(conversation, null, false);
+	}
+
+	public void switchToConversation(Conversation conversation, String text,
+			boolean newTask) {
+		switchToConversation(conversation,text,null,newTask);
+	}
+
+	public void highlightInMuc(Conversation conversation, String nick) {
+		switchToConversation(conversation,null,nick,false);
+	}
+
+	private void switchToConversation(Conversation conversation, String text, String nick, boolean newTask) {
+		Intent viewConversationIntent = new Intent(this,
+				ConversationActivity.class);
+		viewConversationIntent.setAction(Intent.ACTION_VIEW);
+		viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
+				conversation.getUuid());
+		if (text != null) {
+			viewConversationIntent.putExtra(ConversationActivity.TEXT, text);
+		}
+		if (nick != null) {
+			viewConversationIntent.putExtra(ConversationActivity.NICK, nick);
+		}
+		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
+		if (newTask) {
+			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
+					| Intent.FLAG_ACTIVITY_NEW_TASK
+					| Intent.FLAG_ACTIVITY_SINGLE_TOP);
+		} else {
+			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
+					| Intent.FLAG_ACTIVITY_CLEAR_TOP);
+		}
+		startActivity(viewConversationIntent);
+		finish();
+	}
+
+	public void switchToContactDetails(Contact contact) {
+		Intent intent = new Intent(this, ContactDetailsActivity.class);
+		intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
+		intent.putExtra("account", contact.getAccount().getJid().toBareJid().toString());
+		intent.putExtra("contact", contact.getJid().toString());
+		startActivity(intent);
+	}
+
+	public void switchToAccount(Account account) {
+		Intent intent = new Intent(this, EditAccountActivity.class);
+		intent.putExtra("jid", account.getJid().toBareJid().toString());
+		startActivity(intent);
+	}
+
+	protected void inviteToConversation(Conversation conversation) {
+		Intent intent = new Intent(getApplicationContext(),
+				ChooseContactActivity.class);
+		List<String> contacts = new ArrayList<>();
+		if (conversation.getMode() == Conversation.MODE_MULTI) {
+			for (MucOptions.User user : conversation.getMucOptions().getUsers()) {
+				Jid jid = user.getJid();
+				if (jid != null) {
+					contacts.add(jid.toBareJid().toString());
+				}
+			}
+		} else {
+			contacts.add(conversation.getJid().toBareJid().toString());
+		}
+		intent.putExtra("filter_contacts", contacts.toArray(new String[contacts.size()]));
+		intent.putExtra("conversation", conversation.getUuid());
+		intent.putExtra("multiple", true);
+		startActivityForResult(intent, REQUEST_INVITE_TO_CONVERSATION);
+	}
+
+	protected void announcePgp(Account account, final Conversation conversation) {
+		xmppConnectionService.getPgpEngine().generateSignature(account,
+				"online", new UiCallback<Account>() {
+
+					@Override
+					public void userInputRequried(PendingIntent pi,
+							Account account) {
+						try {
+							startIntentSenderForResult(pi.getIntentSender(),
+									REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
+						} catch (final SendIntentException ignored) {
+						}
+					}
+
+					@Override
+					public void success(Account account) {
+						xmppConnectionService.databaseBackend
+							.updateAccount(account);
+						xmppConnectionService.sendPresence(account);
+						if (conversation != null) {
+							conversation
+								.setNextEncryption(Message.ENCRYPTION_PGP);
+							xmppConnectionService.databaseBackend
+								.updateConversation(conversation);
+						}
+					}
+
+					@Override
+					public void error(int error, Account account) {
+						displayErrorDialog(error);
+					}
+				});
+	}
+
+	protected void displayErrorDialog(final int errorCode) {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				AlertDialog.Builder builder = new AlertDialog.Builder(
+						XmppActivity.this);
+				builder.setIconAttribute(android.R.attr.alertDialogIcon);
+				builder.setTitle(getString(R.string.error));
+				builder.setMessage(errorCode);
+				builder.setNeutralButton(R.string.accept, null);
+				builder.create().show();
+			}
+		});
+
+	}
+
+	protected void showAddToRosterDialog(final Conversation conversation) {
+		showAddToRosterDialog(conversation.getContact());
+	}
+
+	protected void showAddToRosterDialog(final Contact contact) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(contact.getJid().toString());
+		builder.setMessage(getString(R.string.not_in_roster));
+		builder.setNegativeButton(getString(R.string.cancel), null);
+		builder.setPositiveButton(getString(R.string.add_contact),
+				new DialogInterface.OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						final Jid jid = contact.getJid();
+						Account account = contact.getAccount();
+						Contact contact = account.getRoster().getContact(jid);
+						xmppConnectionService.createContact(contact);
+					}
+				});
+		builder.create().show();
+	}
+
+	private void showAskForPresenceDialog(final Contact contact) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(contact.getJid().toString());
+		builder.setMessage(R.string.request_presence_updates);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.request_now,
+				new DialogInterface.OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						if (xmppConnectionServiceBound) {
+							xmppConnectionService.sendPresencePacket(contact
+									.getAccount(), xmppConnectionService
+									.getPresenceGenerator()
+									.requestPresenceUpdatesFrom(contact));
+						}
+					}
+				});
+		builder.create().show();
+	}
+
+	private void warnMutalPresenceSubscription(final Conversation conversation,
+			final OnPresenceSelected listener) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(conversation.getContact().getJid().toString());
+		builder.setMessage(R.string.without_mutual_presence_updates);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.setPositiveButton(R.string.ignore, new OnClickListener() {
+
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				conversation.setNextCounterpart(null);
+				if (listener != null) {
+					listener.onPresenceSelected();
+				}
+			}
+		});
+		builder.create().show();
+	}
+
+	protected void quickEdit(String previousValue, OnValueEdited callback) {
+		quickEdit(previousValue, callback, false);
+	}
+
+	protected void quickPasswordEdit(String previousValue,
+			OnValueEdited callback) {
+		quickEdit(previousValue, callback, true);
+	}
+
+	@SuppressLint("InflateParams")
+	private void quickEdit(final String previousValue,
+			final OnValueEdited callback, boolean password) {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		View view = getLayoutInflater().inflate(R.layout.quickedit, null);
+		final EditText editor = (EditText) view.findViewById(R.id.editor);
+		OnClickListener mClickListener = new OnClickListener() {
+
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				String value = editor.getText().toString();
+				if (!previousValue.equals(value) && value.trim().length() > 0) {
+					callback.onValueEdited(value);
+				}
+			}
+		};
+		if (password) {
+			editor.setInputType(InputType.TYPE_CLASS_TEXT
+					| InputType.TYPE_TEXT_VARIATION_PASSWORD);
+			editor.setHint(R.string.password);
+			builder.setPositiveButton(R.string.accept, mClickListener);
+		} else {
+			builder.setPositiveButton(R.string.edit, mClickListener);
+		}
+		editor.requestFocus();
+		editor.setText(previousValue);
+		builder.setView(view);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.create().show();
+	}
+
+	public void selectPresence(final Conversation conversation,
+			final OnPresenceSelected listener) {
+		final Contact contact = conversation.getContact();
+		if (conversation.hasValidOtrSession()) {
+			SessionID id = conversation.getOtrSession().getSessionID();
+			Jid jid;
+			try {
+				jid = Jid.fromString(id.getAccountID() + "/" + id.getUserID());
+			} catch (InvalidJidException e) {
+				jid = null;
+			}
+			conversation.setNextCounterpart(jid);
+			listener.onPresenceSelected();
+		} else 	if (!contact.showInRoster()) {
+			showAddToRosterDialog(conversation);
+		} else {
+			Presences presences = contact.getPresences();
+			if (presences.size() == 0) {
+				if (!contact.getOption(Contact.Options.TO)
+						&& !contact.getOption(Contact.Options.ASKING)
+						&& contact.getAccount().getStatus() == Account.State.ONLINE) {
+					showAskForPresenceDialog(contact);
+				} else if (!contact.getOption(Contact.Options.TO)
+						|| !contact.getOption(Contact.Options.FROM)) {
+					warnMutalPresenceSubscription(conversation, listener);
+				} else {
+					conversation.setNextCounterpart(null);
+					listener.onPresenceSelected();
+				}
+			} else if (presences.size() == 1) {
+				String presence = presences.asStringArray()[0];
+				try {
+					conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence));
+				} catch (InvalidJidException e) {
+					conversation.setNextCounterpart(null);
+				}
+				listener.onPresenceSelected();
+			} else {
+				final StringBuilder presence = new StringBuilder();
+				AlertDialog.Builder builder = new AlertDialog.Builder(this);
+				builder.setTitle(getString(R.string.choose_presence));
+				final String[] presencesArray = presences.asStringArray();
+				int preselectedPresence = 0;
+				for (int i = 0; i < presencesArray.length; ++i) {
+					if (presencesArray[i].equals(contact.lastseen.presence)) {
+						preselectedPresence = i;
+						break;
+					}
+				}
+				presence.append(presencesArray[preselectedPresence]);
+				builder.setSingleChoiceItems(presencesArray,
+						preselectedPresence,
+						new DialogInterface.OnClickListener() {
+
+							@Override
+							public void onClick(DialogInterface dialog,
+									int which) {
+								presence.delete(0, presence.length());
+								presence.append(presencesArray[which]);
+							}
+						});
+				builder.setNegativeButton(R.string.cancel, null);
+				builder.setPositiveButton(R.string.ok, new OnClickListener() {
+
+					@Override
+					public void onClick(DialogInterface dialog, int which) {
+						try {
+							conversation.setNextCounterpart(Jid.fromParts(contact.getJid().getLocalpart(),contact.getJid().getDomainpart(),presence.toString()));
+						} catch (InvalidJidException e) {
+							conversation.setNextCounterpart(null);
+						}
+						listener.onPresenceSelected();
+					}
+				});
+				builder.create().show();
+			}
+		}
+	}
+
+	protected void onActivityResult(int requestCode, int resultCode,
+			final Intent data) {
+		super.onActivityResult(requestCode, resultCode, data);
+		if (requestCode == REQUEST_INVITE_TO_CONVERSATION
+				&& resultCode == RESULT_OK) {
+			try {
+				String conversationUuid = data.getStringExtra("conversation");
+				Conversation conversation = xmppConnectionService
+					.findConversationByUuid(conversationUuid);
+				List<Jid> jids = new ArrayList<Jid>();
+				if (data.getBooleanExtra("multiple", false)) {
+					String[] toAdd = data.getStringArrayExtra("contacts");
+					for (String item : toAdd) {
+						jids.add(Jid.fromString(item));
+					}
+				} else {
+					jids.add(Jid.fromString(data.getStringExtra("contact")));
+				}
+
+				if (conversation.getMode() == Conversation.MODE_MULTI) {
+					for (Jid jid : jids) {
+						xmppConnectionService.invite(conversation, jid);
+					}
+				} else {
+					jids.add(conversation.getJid().toBareJid());
+					xmppConnectionService.createAdhocConference(conversation.getAccount(), jids, adhocCallback);
+				}
+			} catch (final InvalidJidException ignored) {
+
+			}
+		}
+	}
+
+	private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
+		@Override
+		public void success(final Conversation conversation) {
+			switchToConversation(conversation);
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					Toast.makeText(XmppActivity.this,R.string.conference_created,Toast.LENGTH_LONG).show();
+				}
+			});
+		}
+
+		@Override
+		public void error(final int errorCode, Conversation object) {
+			runOnUiThread(new Runnable() {
+				@Override
+				public void run() {
+					Toast.makeText(XmppActivity.this,errorCode,Toast.LENGTH_LONG).show();
+				}
+			});
+		}
+
+		@Override
+		public void userInputRequried(PendingIntent pi, Conversation object) {
+
+		}
+	};
+
+	public int getSecondaryTextColor() {
+		return this.mSecondaryTextColor;
+	}
+
+	public int getPrimaryTextColor() {
+		return this.mPrimaryTextColor;
+	}
+
+	public int getWarningTextColor() {
+		return this.mColorRed;
+	}
+
+	public int getPrimaryColor() {
+		return this.mPrimaryColor;
+	}
+
+	public int getOnlineColor() {
+		return this.mColorGreen;
+	}
+	
+	public int getSecondaryBackgroundColor() {
+		return this.mSecondaryBackgroundColor;
+	}
+
+	public int getPixel(int dp) {
+		DisplayMetrics metrics = getResources().getDisplayMetrics();
+		return ((int) (dp * metrics.density));
+	}
+
+	public boolean copyTextToClipboard(String text, int labelResId) {
+		ClipboardManager mClipBoardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+		String label = getResources().getString(labelResId);
+		if (mClipBoardManager != null) {
+			ClipData mClipData = ClipData.newPlainText(label, text);
+			mClipBoardManager.setPrimaryClip(mClipData);
+			return true;
+		}
+		return false;
+	}
+
+	protected void registerNdefPushMessageCallback() {
+		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
+		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
+			nfcAdapter.setNdefPushMessageCallback(new NfcAdapter.CreateNdefMessageCallback() {
+				@Override
+				public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
+					return new NdefMessage(new NdefRecord[]{
+						NdefRecord.createUri(getShareableUri()),
+							NdefRecord.createApplicationRecord("eu.siacs.conversations")
+					});
+				}
+			}, this);
+		}
+	}
+
+	protected void unregisterNdefPushMessageCallback() {
+		NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
+		if (nfcAdapter != null && nfcAdapter.isEnabled()) {
+			nfcAdapter.setNdefPushMessageCallback(null,this);
+		}
+	}
+
+	protected String getShareableUri() {
+		return null;
+	}
+
+	@Override
+	public void onResume() {
+		super.onResume();
+		if (this.getShareableUri()!=null) {
+			this.registerNdefPushMessageCallback();
+		}
+	}
+
+	protected int findTheme() {
+		if (getPreferences().getBoolean("use_larger_font", false)) {
+			return R.style.ConversationsTheme_LargerText;
+		} else {
+			return R.style.ConversationsTheme;
+		}
+	}
+
+	@Override
+	public void onPause() {
+		super.onPause();
+		this.unregisterNdefPushMessageCallback();
+	}
+
+	protected void showQrCode() {
+		String uri = getShareableUri();
+		if (uri!=null) {
+			Point size = new Point();
+			getWindowManager().getDefaultDisplay().getSize(size);
+			final int width = (size.x < size.y ? size.x : size.y);
+			Bitmap bitmap = createQrCodeBitmap(uri, width);
+			ImageView view = new ImageView(this);
+			view.setImageBitmap(bitmap);
+			AlertDialog.Builder builder = new AlertDialog.Builder(this);
+			builder.setView(view);
+			builder.create().show();
+		}
+	}
+
+	protected Bitmap createQrCodeBitmap(String input, int size) {
+		Log.d(Config.LOGTAG,"qr code requested size: "+size);
+		try {
+			final QRCodeWriter QR_CODE_WRITER = new QRCodeWriter();
+			final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
+			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
+			final BitMatrix result = QR_CODE_WRITER.encode(input, BarcodeFormat.QR_CODE, size, size, hints);
+			final int width = result.getWidth();
+			final int height = result.getHeight();
+			final int[] pixels = new int[width * height];
+			for (int y = 0; y < height; y++) {
+				final int offset = y * width;
+				for (int x = 0; x < width; x++) {
+					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
+				}
+			}
+			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+			Log.d(Config.LOGTAG,"output size: "+width+"x"+height);
+			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+			return bitmap;
+		} catch (final WriterException e) {
+			return null;
+		}
+	}
+
+	public AvatarService avatarService() {
+		return xmppConnectionService.getAvatarService();
+	}
+
+	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
+		private final WeakReference<ImageView> imageViewReference;
+		private Message message = null;
+
+		public BitmapWorkerTask(ImageView imageView) {
+			imageViewReference = new WeakReference<>(imageView);
+		}
+
+		@Override
+		protected Bitmap doInBackground(Message... params) {
+			message = params[0];
+			try {
+				return xmppConnectionService.getFileBackend().getThumbnail(
+						message, (int) (metrics.density * 288), false);
+			} catch (FileNotFoundException e) {
+				return null;
+			}
+		}
+
+		@Override
+		protected void onPostExecute(Bitmap bitmap) {
+			if (bitmap != null) {
+				final ImageView imageView = imageViewReference.get();
+				if (imageView != null) {
+					imageView.setImageBitmap(bitmap);
+					imageView.setBackgroundColor(0x00000000);
+				}
+			}
+		}
+	}
+
+	public void loadBitmap(Message message, ImageView imageView) {
+		Bitmap bm;
+		try {
+			bm = xmppConnectionService.getFileBackend().getThumbnail(message,
+					(int) (metrics.density * 288), true);
+		} catch (FileNotFoundException e) {
+			bm = null;
+		}
+		if (bm != null) {
+			imageView.setImageBitmap(bm);
+			imageView.setBackgroundColor(0x00000000);
+		} else {
+			if (cancelPotentialWork(message, imageView)) {
+				imageView.setBackgroundColor(0xff333333);
+				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+				final AsyncDrawable asyncDrawable = new AsyncDrawable(
+						getResources(), null, task);
+				imageView.setImageDrawable(asyncDrawable);
+				try {
+					task.execute(message);
+				} catch (final RejectedExecutionException ignored) {
+				}
+			}
+		}
+	}
+
+	public static boolean cancelPotentialWork(Message message,
+			ImageView imageView) {
+		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+		if (bitmapWorkerTask != null) {
+			final Message oldMessage = bitmapWorkerTask.message;
+			if (oldMessage == null || message != oldMessage) {
+				bitmapWorkerTask.cancel(true);
+			} else {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+		if (imageView != null) {
+			final Drawable drawable = imageView.getDrawable();
+			if (drawable instanceof AsyncDrawable) {
+				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+				return asyncDrawable.getBitmapWorkerTask();
+			}
+		}
+		return null;
+	}
+
+	static class AsyncDrawable extends BitmapDrawable {
+		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
+
+		public AsyncDrawable(Resources res, Bitmap bitmap,
+				BitmapWorkerTask bitmapWorkerTask) {
+			super(res, bitmap);
+			bitmapWorkerTaskReference = new WeakReference<>(
+					bitmapWorkerTask);
+		}
+
+		public BitmapWorkerTask getBitmapWorkerTask() {
+			return bitmapWorkerTaskReference.get();
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
new file mode 100644
index 00000000..1dd855d9
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
@@ -0,0 +1,54 @@
+package de.thedevstack.conversationsplus.ui.adapter;
+
+import java.util.List;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.ui.XmppActivity;
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+public class AccountAdapter extends ArrayAdapter<Account> {
+
+	private XmppActivity activity;
+
+	public AccountAdapter(XmppActivity activity, List<Account> objects) {
+		super(activity, 0, objects);
+		this.activity = activity;
+	}
+
+	@Override
+	public View getView(int position, View view, ViewGroup parent) {
+		Account account = getItem(position);
+		if (view == null) {
+			LayoutInflater inflater = (LayoutInflater) getContext()
+					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+			view = inflater.inflate(R.layout.account_row, parent, false);
+		}
+		TextView jid = (TextView) view.findViewById(R.id.account_jid);
+		jid.setText(account.getJid().toBareJid().toString());
+		TextView statusView = (TextView) view.findViewById(R.id.account_status);
+		ImageView imageView = (ImageView) view.findViewById(R.id.account_image);
+		imageView.setImageBitmap(activity.avatarService().get(account,
+				activity.getPixel(48)));
+        statusView.setText(getContext().getString(account.getStatus().getReadableId()));
+        switch (account.getStatus()) {
+            case ONLINE:
+                statusView.setTextColor(activity.getOnlineColor());
+                break;
+            case DISABLED:
+            case CONNECTING:
+                statusView.setTextColor(activity.getSecondaryTextColor());
+                break;
+            default:
+                statusView.setTextColor(activity.getWarningTextColor());
+                break;
+        }
+		return view;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
new file mode 100644
index 00000000..cad9975b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
@@ -0,0 +1,224 @@
+package de.thedevstack.conversationsplus.ui.adapter;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
+import android.util.Pair;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.lang.ref.WeakReference;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Presences;
+import de.thedevstack.conversationsplus.ui.ConversationActivity;
+import de.thedevstack.conversationsplus.ui.XmppActivity;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import github.ankushsachdeva.emojicon.EmojiconTextView;
+
+public class ConversationAdapter extends ArrayAdapter<Conversation> {
+
+	private XmppActivity activity;
+
+	public ConversationAdapter(XmppActivity activity,
+			List<Conversation> conversations) {
+		super(activity, 0, conversations);
+		this.activity = activity;
+	}
+
+	@Override
+	public View getView(int position, View view, ViewGroup parent) {
+		if (view == null) {
+			LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+			view = inflater.inflate(R.layout.conversation_list_row,parent, false);
+		}
+		Conversation conversation = getItem(position);
+		if (this.activity instanceof ConversationActivity) {
+			ConversationActivity activity = (ConversationActivity) this.activity;
+			if (!activity.isConversationsOverviewHideable()) {
+				if (conversation == activity.getSelectedConversation()) {
+					view.setBackgroundColor(activity
+							.getSecondaryBackgroundColor());
+				} else {
+					view.setBackgroundColor(Color.TRANSPARENT);
+				}
+			} else {
+				view.setBackgroundColor(Color.TRANSPARENT);
+			}
+		}
+		TextView convName = (TextView) view.findViewById(R.id.conversation_name);
+		if (conversation.getMode() == Conversation.MODE_SINGLE || activity.useSubjectToIdentifyConference()) {
+			convName.setText(conversation.getName());
+		} else {
+			convName.setText(conversation.getJid().toBareJid().toString());
+		}
+		EmojiconTextView mLastMessage = (EmojiconTextView) view.findViewById(R.id.conversation_lastmsg);
+		TextView mTimestamp = (TextView) view.findViewById(R.id.conversation_lastupdate);
+		ImageView imagePreview = (ImageView) view.findViewById(R.id.conversation_lastimage);
+
+        if (Settings.SHOW_ONLINE_STATUS && conversation != null && conversation.getAccount().getStatus() == Account.State.ONLINE) {
+            TextView status = (TextView) view.findViewById(R.id.status);
+
+            String color = "#000000";
+            if (conversation.getMode() == Conversation.MODE_SINGLE) {
+                switch (conversation.getContact().getMostAvailableStatus()) {
+                    case Presences.ONLINE:
+                    case Presences.CHAT:
+                        color = "#259B23";
+                        break;
+                    case Presences.AWAY:
+                    case Presences.XA:
+                        color = "#FF9800";
+                        break;
+                    case Presences.DND:
+                        color = "#E51C23";
+                        break;
+                }
+            } else if (conversation.getMode() == Conversation.MODE_MULTI && conversation.getMucOptions().online()) {
+                color = "#259B23";
+            }
+            status.setBackgroundColor(Color.parseColor(color));
+        }
+
+		Message message = conversation.getLatestMessage();
+
+		if (!conversation.isRead()) {
+			convName.setTypeface(null, Typeface.BOLD);
+		} else {
+			convName.setTypeface(null, Typeface.NORMAL);
+		}
+
+		if (message.getImageParams().width > 0
+				&& (message.getDownloadable() == null
+				|| message.getDownloadable().getStatus() != Downloadable.STATUS_DELETED)) {
+			mLastMessage.setVisibility(View.GONE);
+			imagePreview.setVisibility(View.VISIBLE);
+			activity.loadBitmap(message, imagePreview);
+		} else {
+			Pair<String,Boolean> preview = UIHelper.getMessagePreview(activity,message);
+			mLastMessage.setVisibility(View.VISIBLE);
+			imagePreview.setVisibility(View.GONE);
+            boolean parseEmoticons = Settings.PARSE_EMOTICONS;
+            CharSequence msgText = parseEmoticons ? UIHelper.transformAsciiEmoticons(getContext(), preview.first) : preview.first;
+			mLastMessage.setText(msgText);
+			if (preview.second) {
+				if (conversation.isRead()) {
+					mLastMessage.setTypeface(null, Typeface.ITALIC);
+				} else {
+					mLastMessage.setTypeface(null,Typeface.BOLD_ITALIC);
+				}
+			} else {
+				if (conversation.isRead()) {
+					mLastMessage.setTypeface(null,Typeface.NORMAL);
+				} else {
+					mLastMessage.setTypeface(null,Typeface.BOLD);
+				}
+			}
+		}
+
+		mTimestamp.setText(UIHelper.readableTimeDifference(activity,conversation.getLatestMessage().getTimeSent()));
+		ImageView profilePicture = (ImageView) view.findViewById(R.id.conversation_image);
+		loadAvatar(conversation,profilePicture);
+
+		return view;
+	}
+
+	class BitmapWorkerTask extends AsyncTask<Conversation, Void, Bitmap> {
+		private final WeakReference<ImageView> imageViewReference;
+		private Conversation conversation = null;
+
+		public BitmapWorkerTask(ImageView imageView) {
+			imageViewReference = new WeakReference<>(imageView);
+		}
+
+		@Override
+		protected Bitmap doInBackground(Conversation... params) {
+			return activity.avatarService().get(params[0], activity.getPixel(56));
+		}
+
+		@Override
+		protected void onPostExecute(Bitmap bitmap) {
+			if (bitmap != null) {
+				final ImageView imageView = imageViewReference.get();
+				if (imageView != null) {
+					imageView.setImageBitmap(bitmap);
+					imageView.setBackgroundColor(0x00000000);
+				}
+			}
+		}
+	}
+
+	public void loadAvatar(Conversation conversation, ImageView imageView) {
+		if (cancelPotentialWork(conversation, imageView)) {
+			final Bitmap bm = activity.avatarService().get(conversation, activity.getPixel(56), true);
+			if (bm != null) {
+				imageView.setImageBitmap(bm);
+				imageView.setBackgroundColor(0x00000000);
+			} else {
+				imageView.setBackgroundColor(UIHelper.getColorForName(conversation.getName()));
+				imageView.setImageDrawable(null);
+				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
+				imageView.setImageDrawable(asyncDrawable);
+				try {
+					task.execute(conversation);
+				} catch (final RejectedExecutionException ignored) {
+				}
+			}
+		}
+	}
+
+	public static boolean cancelPotentialWork(Conversation conversation, ImageView imageView) {
+		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+		if (bitmapWorkerTask != null) {
+			final Conversation oldConversation = bitmapWorkerTask.conversation;
+			if (oldConversation == null || conversation != oldConversation) {
+				bitmapWorkerTask.cancel(true);
+			} else {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+		if (imageView != null) {
+			final Drawable drawable = imageView.getDrawable();
+			if (drawable instanceof AsyncDrawable) {
+				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+				return asyncDrawable.getBitmapWorkerTask();
+			}
+		}
+		return null;
+	}
+
+	static class AsyncDrawable extends BitmapDrawable {
+		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
+
+		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
+			super(res, bitmap);
+			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
+		}
+
+		public BitmapWorkerTask getBitmapWorkerTask() {
+			return bitmapWorkerTaskReference.get();
+		}
+	}
+}
+\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java
new file mode 100644
index 00000000..7bca0aa6
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/KnownHostsAdapter.java
@@ -0,0 +1,71 @@
+package de.thedevstack.conversationsplus.ui.adapter;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import android.content.Context;
+import android.widget.ArrayAdapter;
+import android.widget.Filter;
+
+public class KnownHostsAdapter extends ArrayAdapter<String> {
+	private ArrayList<String> domains;
+	private Filter domainFilter = new Filter() {
+
+		@Override
+		protected FilterResults performFiltering(CharSequence constraint) {
+			if (constraint != null) {
+				ArrayList<String> suggestions = new ArrayList<String>();
+				final String[] split = constraint.toString().split("@");
+				if (split.length == 1) {
+					for (String domain : domains) {
+						suggestions.add(split[0].toLowerCase(Locale
+								.getDefault()) + "@" + domain);
+					}
+				} else if (split.length == 2) {
+					for (String domain : domains) {
+						if (domain.contentEquals(split[1])) {
+							suggestions.clear();
+							break;
+						} else if (domain.contains(split[1])) {
+							suggestions.add(split[0].toLowerCase(Locale
+									.getDefault()) + "@" + domain);
+						}
+					}
+				} else {
+					return new FilterResults();
+				}
+				FilterResults filterResults = new FilterResults();
+				filterResults.values = suggestions;
+				filterResults.count = suggestions.size();
+				return filterResults;
+			} else {
+				return new FilterResults();
+			}
+		}
+
+		@Override
+		protected void publishResults(CharSequence constraint,
+				FilterResults results) {
+			ArrayList filteredList = (ArrayList) results.values;
+			if (results != null && results.count > 0) {
+				clear();
+				for (Object c : filteredList) {
+					add((String) c);
+				}
+				notifyDataSetChanged();
+			}
+		}
+	};
+
+	public KnownHostsAdapter(Context context, int viewResourceId,
+			List<String> mKnownHosts) {
+		super(context, viewResourceId, new ArrayList<String>());
+		domains = new ArrayList<String>(mKnownHosts);
+	}
+
+	@Override
+	public Filter getFilter() {
+		return domainFilter;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
new file mode 100644
index 00000000..e78d7f5c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
@@ -0,0 +1,181 @@
+package de.thedevstack.conversationsplus.ui.adapter;
+
+import java.lang.ref.WeakReference;
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.ListItem;
+import de.thedevstack.conversationsplus.ui.XmppActivity;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
+import android.preference.PreferenceManager;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+public class ListItemAdapter extends ArrayAdapter<ListItem> {
+
+	protected XmppActivity activity;
+	protected boolean showDynamicTags = false;
+	private View.OnClickListener onTagTvClick = new View.OnClickListener() {
+		@Override
+		public void onClick(View view) {
+			if (view instanceof  TextView && mOnTagClickedListener != null) {
+				TextView tv = (TextView) view;
+				final String tag = tv.getText().toString();
+				mOnTagClickedListener.onTagClicked(tag);
+			}
+		}
+	};
+	private OnTagClickedListener mOnTagClickedListener = null;
+
+	public ListItemAdapter(XmppActivity activity, List<ListItem> objects) {
+		super(activity, 0, objects);
+		this.activity = activity;
+		SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
+		this.showDynamicTags = preferences.getBoolean("show_dynamic_tags",false);
+	}
+
+	@Override
+	public View getView(int position, View view, ViewGroup parent) {
+		LayoutInflater inflater = (LayoutInflater) getContext()
+				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+		ListItem item = getItem(position);
+		if (view == null) {
+			view = inflater.inflate(R.layout.contact, parent, false);
+		}
+		TextView tvName = (TextView) view.findViewById(R.id.contact_display_name);
+		TextView tvJid = (TextView) view.findViewById(R.id.contact_jid);
+		ImageView picture = (ImageView) view.findViewById(R.id.contact_photo);
+		LinearLayout tagLayout = (LinearLayout) view.findViewById(R.id.tags);
+
+		List<ListItem.Tag> tags = item.getTags();
+		if (tags.size() == 0 || !this.showDynamicTags) {
+			tagLayout.setVisibility(View.GONE);
+		} else {
+			tagLayout.setVisibility(View.VISIBLE);
+			tagLayout.removeAllViewsInLayout();
+			for(ListItem.Tag tag : tags) {
+				TextView tv = (TextView) inflater.inflate(R.layout.list_item_tag,tagLayout,false);
+				tv.setText(tag.getName());
+				tv.setBackgroundColor(tag.getColor());
+				tv.setOnClickListener(this.onTagTvClick);
+				tagLayout.addView(tv);
+			}
+		}
+		final Jid jid = item.getJid();
+		if (jid != null) {
+			tvJid.setText(jid.toString());
+		} else {
+			tvJid.setText("");
+		}
+		tvName.setText(item.getDisplayName());
+		loadAvatar(item,picture);
+		return view;
+	}
+
+	public void setOnTagClickedListener(OnTagClickedListener listener) {
+		this.mOnTagClickedListener = listener;
+	}
+
+	public interface OnTagClickedListener {
+		public void onTagClicked(String tag);
+	}
+
+	class BitmapWorkerTask extends AsyncTask<ListItem, Void, Bitmap> {
+		private final WeakReference<ImageView> imageViewReference;
+		private ListItem item = null;
+
+		public BitmapWorkerTask(ImageView imageView) {
+			imageViewReference = new WeakReference<>(imageView);
+		}
+
+		@Override
+		protected Bitmap doInBackground(ListItem... params) {
+			return activity.avatarService().get(params[0], activity.getPixel(48));
+		}
+
+		@Override
+		protected void onPostExecute(Bitmap bitmap) {
+			if (bitmap != null) {
+				final ImageView imageView = imageViewReference.get();
+				if (imageView != null) {
+					imageView.setImageBitmap(bitmap);
+					imageView.setBackgroundColor(0x00000000);
+				}
+			}
+		}
+	}
+
+	public void loadAvatar(ListItem item, ImageView imageView) {
+		if (cancelPotentialWork(item, imageView)) {
+			final Bitmap bm = activity.avatarService().get(item,activity.getPixel(48),true);
+			if (bm != null) {
+				imageView.setImageBitmap(bm);
+				imageView.setBackgroundColor(0x00000000);
+			} else {
+				imageView.setBackgroundColor(UIHelper.getColorForName(item.getDisplayName()));
+				imageView.setImageDrawable(null);
+				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
+				imageView.setImageDrawable(asyncDrawable);
+				try {
+					task.execute(item);
+				} catch (final RejectedExecutionException ignored) {
+				}
+			}
+		}
+	}
+
+	public static boolean cancelPotentialWork(ListItem item, ImageView imageView) {
+		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+		if (bitmapWorkerTask != null) {
+			final ListItem oldItem = bitmapWorkerTask.item;
+			if (oldItem == null || item != oldItem) {
+				bitmapWorkerTask.cancel(true);
+			} else {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+		if (imageView != null) {
+			final Drawable drawable = imageView.getDrawable();
+			if (drawable instanceof AsyncDrawable) {
+				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+				return asyncDrawable.getBitmapWorkerTask();
+			}
+		}
+		return null;
+	}
+
+	static class AsyncDrawable extends BitmapDrawable {
+		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
+
+		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
+			super(res, bitmap);
+			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
+		}
+
+		public BitmapWorkerTask getBitmapWorkerTask() {
+			return bitmapWorkerTaskReference.get();
+		}
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
new file mode 100644
index 00000000..19b993cc
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
@@ -0,0 +1,603 @@
+package de.thedevstack.conversationsplus.ui.adapter;
+
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.graphics.Typeface;
+import android.net.Uri;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.style.ForegroundColorSpan;
+import android.text.style.StyleSpan;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnLongClickListener;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.util.List;
+
+import de.tzur.conversations.Settings;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Message.ImageParams;
+import de.thedevstack.conversationsplus.ui.ConversationActivity;
+import de.thedevstack.conversationsplus.utils.GeoHelper;
+import de.thedevstack.conversationsplus.utils.UIHelper;
+import github.ankushsachdeva.emojicon.EmojiconTextView;
+
+public class MessageAdapter extends ArrayAdapter<Message> {
+
+	private static final int SENT = 0;
+	private static final int RECEIVED = 1;
+	private static final int STATUS = 2;
+	private static final int NULL = 3;
+
+	private ConversationActivity activity;
+
+	private DisplayMetrics metrics;
+
+	private OnContactPictureClicked mOnContactPictureClickedListener;
+	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
+
+	private OnLongClickListener openContextMenu = new OnLongClickListener() {
+
+		@Override
+		public boolean onLongClick(View v) {
+			v.showContextMenu();
+			return true;
+		}
+	};
+
+	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
+		super(activity, 0, messages);
+		this.activity = activity;
+		metrics = getContext().getResources().getDisplayMetrics();
+	}
+
+	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
+		this.mOnContactPictureClickedListener = listener;
+	}
+
+	public void setOnContactPictureLongClicked(
+			OnContactPictureLongClicked listener) {
+		this.mOnContactPictureLongClickedListener = listener;
+			}
+
+	@Override
+	public int getViewTypeCount() {
+		return 4;
+	}
+
+	@Override
+	public int getItemViewType(int position) {
+		if (getItem(position).wasMergedIntoPrevious()) {
+			return NULL;
+		} else if (getItem(position).getType() == Message.TYPE_STATUS) {
+			return STATUS;
+		} else if (getItem(position).getStatus() <= Message.STATUS_RECEIVED) {
+			return RECEIVED;
+		} else {
+			return SENT;
+		}
+	}
+
+	private void displayStatus(ViewHolder viewHolder, Message message) {
+		String filesize = null;
+		String info = null;
+		boolean error = false;
+		if (viewHolder.indicatorReceived != null) {
+			viewHolder.indicatorReceived.setVisibility(View.GONE);
+		}
+		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
+			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
+		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getDownloadable() != null) {
+			ImageParams params = message.getImageParams();
+			if (params.size > (1.5 * 1024 * 1024)) {
+				filesize = params.size / (1024 * 1024)+ " MiB";
+			} else if (params.size > 0) {
+				filesize = params.size / 1024 + " KiB";
+			}
+			if (message.getDownloadable() != null && message.getDownloadable().getStatus() == Downloadable.STATUS_FAILED) {
+				error = true;
+			}
+		}
+		switch (message.getMergedStatus()) {
+			case Message.STATUS_WAITING:
+				info = getContext().getString(R.string.waiting);
+				break;
+			case Message.STATUS_UNSEND:
+				Downloadable d = message.getDownloadable();
+				if (d!=null) {
+					info = getContext().getString(R.string.sending_file,d.getProgress());
+				} else {
+					info = getContext().getString(R.string.sending);
+				}
+				break;
+			case Message.STATUS_OFFERED:
+				info = getContext().getString(R.string.offering);
+				break;
+			case Message.STATUS_SEND_RECEIVED:
+				if (activity.indicateReceived()) {
+					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
+				}
+				break;
+			case Message.STATUS_SEND_DISPLAYED:
+				if (activity.indicateReceived()) {
+					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
+				}
+				break;
+			case Message.STATUS_SEND_FAILED:
+				info = getContext().getString(R.string.send_failed);
+				error = true;
+				break;
+			default:
+				if (multiReceived) {
+					info = UIHelper.getMessageDisplayName(message);
+				}
+				break;
+		}
+		if (error) {
+			viewHolder.time.setTextColor(activity.getWarningTextColor());
+		} else {
+			viewHolder.time.setTextColor(activity.getSecondaryTextColor());
+		}
+		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
+			viewHolder.indicator.setVisibility(View.GONE);
+		} else {
+			viewHolder.indicator.setVisibility(View.VISIBLE);
+		}
+
+		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(),
+				message.getMergedTimeSent());
+		if (message.getStatus() <= Message.STATUS_RECEIVED) {
+			if ((filesize != null) && (info != null)) {
+				viewHolder.time.setText(filesize + " \u00B7 " + info);
+			} else if ((filesize == null) && (info != null)) {
+				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
+			} else if ((filesize != null) && (info == null)) {
+				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
+			} else {
+				viewHolder.time.setText(formatedTime);
+			}
+		} else {
+			if ((filesize != null) && (info != null)) {
+				viewHolder.time.setText(filesize + " \u00B7 " + info);
+			} else if ((filesize == null) && (info != null)) {
+				if (error) {
+					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
+				} else {
+					viewHolder.time.setText(info);
+				}
+			} else if ((filesize != null) && (info == null)) {
+				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
+			} else {
+				viewHolder.time.setText(formatedTime);
+			}
+		}
+	}
+
+	private void displayInfoMessage(ViewHolder viewHolder, String text) {
+		if (viewHolder.download_button != null) {
+			viewHolder.download_button.setVisibility(View.GONE);
+		}
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		viewHolder.messageBody.setText(text);
+		viewHolder.messageBody.setTextColor(activity.getSecondaryTextColor());
+		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
+		viewHolder.messageBody.setTextIsSelectable(false);
+	}
+
+	private void displayDecryptionFailed(ViewHolder viewHolder) {
+		if (viewHolder.download_button != null) {
+			viewHolder.download_button.setVisibility(View.GONE);
+		}
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		viewHolder.messageBody.setText(getContext().getString(
+					R.string.decryption_failed));
+		viewHolder.messageBody.setTextColor(activity.getWarningTextColor());
+		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
+		viewHolder.messageBody.setTextIsSelectable(false);
+	}
+
+	private void displayTextMessage(final ViewHolder viewHolder, final Message message) {
+		if (viewHolder.download_button != null) {
+			viewHolder.download_button.setVisibility(View.GONE);
+		}
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.VISIBLE);
+		if (message.getBody() != null) {
+			final String nick = UIHelper.getMessageDisplayName(message);
+			final String formattedBody = message.getMergedBody().replaceAll("^" + Message.ME_COMMAND,
+					nick + " ");
+			if (message.getType() != Message.TYPE_PRIVATE) {
+
+				if (message.hasMeCommand()) {
+					final Spannable span = new SpannableString(formattedBody);
+					span.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
+							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+					viewHolder.messageBody.setText(span);
+				} else {
+                    boolean parseEmoticons = Settings.PARSE_EMOTICONS;
+                    viewHolder.messageBody.setText(parseEmoticons ? UIHelper
+                            .transformAsciiEmoticons(getContext(), message.getMergedBody())
+                            : message.getMergedBody());
+				}
+			} else {
+				String privateMarker;
+				if (message.getStatus() <= Message.STATUS_RECEIVED) {
+					privateMarker = activity
+						.getString(R.string.private_message);
+				} else {
+					final String to;
+					if (message.getCounterpart() != null) {
+						to = message.getCounterpart().getResourcepart();
+					} else {
+						to = "";
+					}
+					privateMarker = activity.getString(R.string.private_message_to, to);
+				}
+				final Spannable span = new SpannableString(privateMarker + " "
+						+ formattedBody);
+				span.setSpan(new ForegroundColorSpan(activity
+							.getSecondaryTextColor()), 0, privateMarker
+						.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+				span.setSpan(new StyleSpan(Typeface.BOLD), 0,
+						privateMarker.length(),
+						Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+				if (message.hasMeCommand()) {
+					span.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarker.length() + 1,
+							privateMarker.length() + 1 + nick.length(),
+							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+				}
+				viewHolder.messageBody.setText(span);
+			}
+		} else {
+			viewHolder.messageBody.setText("");
+		}
+		viewHolder.messageBody.setTextColor(activity.getPrimaryTextColor());
+		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
+		viewHolder.messageBody.setTextIsSelectable(true);
+	}
+
+	private void displayDownloadableMessage(ViewHolder viewHolder,
+			final Message message, String text) {
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.GONE);
+		viewHolder.download_button.setVisibility(View.VISIBLE);
+		viewHolder.download_button.setText(text);
+		viewHolder.download_button.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				startDownloadable(message);
+			}
+		});
+		viewHolder.download_button.setOnLongClickListener(openContextMenu);
+	}
+
+	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.GONE);
+		viewHolder.download_button.setVisibility(View.VISIBLE);
+		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity,message)));
+		viewHolder.download_button.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				openDownloadable(message);
+			}
+		});
+		viewHolder.download_button.setOnLongClickListener(openContextMenu);
+	}
+
+	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.GONE);
+		viewHolder.download_button.setVisibility(View.VISIBLE);
+		viewHolder.download_button.setText(R.string.show_location);
+		viewHolder.download_button.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				showLocation(message);
+			}
+		});
+		viewHolder.download_button.setOnLongClickListener(openContextMenu);
+	}
+
+	private void displayImageMessage(ViewHolder viewHolder,
+			final Message message) {
+		if (viewHolder.download_button != null) {
+			viewHolder.download_button.setVisibility(View.GONE);
+		}
+		viewHolder.messageBody.setVisibility(View.GONE);
+		viewHolder.image.setVisibility(View.VISIBLE);
+		ImageParams params = message.getImageParams();
+		double target = metrics.density * 288;
+		int scalledW;
+		int scalledH;
+		if (params.width <= params.height) {
+			scalledW = (int) (params.width / ((double) params.height / target));
+			scalledH = (int) target;
+		} else {
+			scalledW = (int) target;
+			scalledH = (int) (params.height / ((double) params.width / target));
+		}
+		viewHolder.image.setLayoutParams(new LinearLayout.LayoutParams(
+					scalledW, scalledH));
+		activity.loadBitmap(message, viewHolder.image);
+		viewHolder.image.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				Intent intent = new Intent(Intent.ACTION_VIEW);
+				intent.setDataAndType(activity.xmppConnectionService
+						.getFileBackend().getJingleFileUri(message), "image/*");
+				getContext().startActivity(intent);
+			}
+		});
+		viewHolder.image.setOnLongClickListener(openContextMenu);
+	}
+
+	@Override
+	public View getView(int position, View view, ViewGroup parent) {
+		final Message message = getItem(position);
+		final Conversation conversation = message.getConversation();
+		final Account account = conversation.getAccount();
+		final int type = getItemViewType(position);
+		ViewHolder viewHolder;
+		if (view == null) {
+			viewHolder = new ViewHolder();
+			switch (type) {
+				case NULL:
+					view = activity.getLayoutInflater().inflate(
+							R.layout.message_null, parent, false);
+					break;
+				case SENT:
+					view = activity.getLayoutInflater().inflate(
+							R.layout.message_sent, parent, false);
+					viewHolder.message_box = (LinearLayout) view
+						.findViewById(R.id.message_box);
+					viewHolder.contact_picture = (ImageView) view
+						.findViewById(R.id.message_photo);
+					viewHolder.download_button = (Button) view
+						.findViewById(R.id.download_button);
+					viewHolder.indicator = (ImageView) view
+						.findViewById(R.id.security_indicator);
+					viewHolder.image = (ImageView) view
+						.findViewById(R.id.message_image);
+					viewHolder.messageBody = (EmojiconTextView) view
+						.findViewById(R.id.message_body);
+					viewHolder.time = (TextView) view
+						.findViewById(R.id.message_time);
+					viewHolder.indicatorReceived = (ImageView) view
+						.findViewById(R.id.indicator_received);
+					break;
+				case RECEIVED:
+					view = activity.getLayoutInflater().inflate(
+							R.layout.message_received, parent, false);
+					viewHolder.message_box = (LinearLayout) view
+						.findViewById(R.id.message_box);
+					viewHolder.contact_picture = (ImageView) view
+						.findViewById(R.id.message_photo);
+					viewHolder.download_button = (Button) view
+						.findViewById(R.id.download_button);
+					viewHolder.indicator = (ImageView) view
+						.findViewById(R.id.security_indicator);
+					viewHolder.image = (ImageView) view
+						.findViewById(R.id.message_image);
+					viewHolder.messageBody = (EmojiconTextView) view
+						.findViewById(R.id.message_body);
+					viewHolder.time = (TextView) view
+						.findViewById(R.id.message_time);
+					viewHolder.indicatorReceived = (ImageView) view
+						.findViewById(R.id.indicator_received);
+					break;
+				case STATUS:
+					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
+					viewHolder.contact_picture = (ImageView) view.findViewById(R.id.message_photo);
+					viewHolder.status_message = (TextView) view.findViewById(R.id.status_message);
+					break;
+				default:
+					viewHolder = null;
+					break;
+			}
+			view.setTag(viewHolder);
+		} else {
+			viewHolder = (ViewHolder) view.getTag();
+			if (viewHolder == null) {
+				return view;
+			}
+		}
+
+		if (type == STATUS) {
+			if (conversation.getMode() == Conversation.MODE_SINGLE) {
+				viewHolder.contact_picture.setImageBitmap(activity
+						.avatarService().get(conversation.getContact(),
+							activity.getPixel(32)));
+				viewHolder.contact_picture.setAlpha(0.5f);
+				viewHolder.status_message.setText(message.getBody());
+			}
+			return view;
+		} else if (type == NULL) {
+			if (viewHolder.message_box != null) {
+				Log.e(Config.LOGTAG, "detected type=NULL but with wrong cached view");
+				view = activity.getLayoutInflater().inflate(R.layout.message_null, parent, false);
+				view.setTag(new ViewHolder());
+			}
+			if (position == getCount() - 1) {
+				view.getLayoutParams().height = 1;
+			} else {
+				view.getLayoutParams().height = 0;
+
+			}
+			view.setLayoutParams(view.getLayoutParams());
+			return view;
+		} else if (message.wasMergedIntoPrevious()) {
+			Log.e(Config.LOGTAG,"detected wasMergedIntoPrevious with wrong type");
+			return view;
+		} else if (viewHolder.messageBody == null || viewHolder.image == null) {
+			return view; //avoiding weird platform bugs
+		} else if (type == RECEIVED) {
+			Contact contact = message.getContact();
+			if (contact != null) {
+				viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(contact, activity.getPixel(48)));
+			} else if (conversation.getMode() == Conversation.MODE_MULTI) {
+				viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(
+						UIHelper.getMessageDisplayName(message),
+						activity.getPixel(48)));
+			}
+		} else if (type == SENT) {
+			viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(account, activity.getPixel(48)));
+		}
+
+		viewHolder.contact_picture
+			.setOnClickListener(new OnClickListener() {
+
+				@Override
+				public void onClick(View v) {
+					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
+						MessageAdapter.this.mOnContactPictureClickedListener
+							.onContactPictureClicked(message);
+					}
+
+				}
+			});
+		viewHolder.contact_picture
+			.setOnLongClickListener(new OnLongClickListener() {
+
+				@Override
+				public boolean onLongClick(View v) {
+					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
+						MessageAdapter.this.mOnContactPictureLongClickedListener
+							.onContactPictureLongClicked(message);
+						return true;
+					} else {
+						return false;
+					}
+				}
+			});
+
+		final Downloadable downloadable = message.getDownloadable();
+		if (downloadable != null && downloadable.getStatus() != Downloadable.STATUS_UPLOADING) {
+			if (downloadable.getStatus() == Downloadable.STATUS_OFFER) {
+				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
+			} else if (downloadable.getStatus() == Downloadable.STATUS_OFFER_CHECK_FILESIZE) {
+				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_image_filesize));
+			} else {
+				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first);
+			}
+		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
+			displayImageMessage(viewHolder, message);
+		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
+			if (message.getImageParams().width > 0) {
+				displayImageMessage(viewHolder,message);
+			} else {
+				displayOpenableMessage(viewHolder, message);
+			}
+		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+			if (activity.hasPgp()) {
+				displayInfoMessage(viewHolder,activity.getString(R.string.encrypted_message));
+			} else {
+				displayInfoMessage(viewHolder,
+						activity.getString(R.string.install_openkeychain));
+				if (viewHolder != null) {
+					viewHolder.message_box
+						.setOnClickListener(new OnClickListener() {
+
+							@Override
+							public void onClick(View v) {
+								activity.showInstallPgpDialog();
+							}
+						});
+				}
+			}
+		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
+			displayDecryptionFailed(viewHolder);
+		} else {
+			if (GeoHelper.isGeoUri(message.getBody())) {
+				displayLocationMessage(viewHolder,message);
+			} else {
+				displayTextMessage(viewHolder, message);
+			}
+		}
+
+		displayStatus(viewHolder, message);
+
+		return view;
+	}
+
+	public void startDownloadable(Message message) {
+		Downloadable downloadable = message.getDownloadable();
+		if (downloadable != null) {
+			if (!downloadable.start()) {
+				Toast.makeText(activity, R.string.not_connected_try_again,
+						Toast.LENGTH_SHORT).show();
+			}
+		}
+	}
+
+	public void openDownloadable(Message message) {
+		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
+		if (!file.exists()) {
+			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
+			return;
+		}
+		Intent openIntent = new Intent(Intent.ACTION_VIEW);
+		openIntent.setDataAndType(Uri.fromFile(file), file.getMimeType());
+		PackageManager manager = activity.getPackageManager();
+		List<ResolveInfo> infos = manager.queryIntentActivities(openIntent, 0);
+		if (infos.size() > 0) {
+			getContext().startActivity(openIntent);
+		} else {
+			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
+		}
+	}
+
+	public void showLocation(Message message) {
+		for(Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
+			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
+				getContext().startActivity(intent);
+				return;
+			}
+		}
+		Toast.makeText(activity,R.string.no_application_found_to_display_location,Toast.LENGTH_SHORT).show();
+	}
+
+	public interface OnContactPictureClicked {
+		public void onContactPictureClicked(Message message);
+	}
+
+	public interface OnContactPictureLongClicked {
+		public void onContactPictureLongClicked(Message message);
+	}
+
+	private static class ViewHolder {
+
+		protected LinearLayout message_box;
+		protected Button download_button;
+		protected ImageView image;
+		protected ImageView indicator;
+		protected ImageView indicatorReceived;
+		protected TextView time;
+		protected EmojiconTextView messageBody;
+		protected ImageView contact_picture;
+		protected TextView status_message;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
new file mode 100644
index 00000000..115ac190
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/CryptoHelper.java
@@ -0,0 +1,124 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.security.SecureRandom;
+import java.text.Normalizer;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+
+public final class CryptoHelper {
+	public static final String FILETRANSFER = "?FILETRANSFERv1:";
+	private final static char[] hexArray = "0123456789abcdef".toCharArray();
+	private final static char[] vowels = "aeiou".toCharArray();
+	private final static char[] consonants = "bcdfghjklmnpqrstvwxyz".toCharArray();
+	final public static byte[] ONE = new byte[] { 0, 0, 0, 1 };
+
+	public static String bytesToHex(byte[] bytes) {
+		char[] hexChars = new char[bytes.length * 2];
+		for (int j = 0; j < bytes.length; j++) {
+			int v = bytes[j] & 0xFF;
+			hexChars[j * 2] = hexArray[v >>> 4];
+			hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+		}
+		return new String(hexChars);
+	}
+
+	public static byte[] hexToBytes(String hexString) {
+		int len = hexString.length();
+		byte[] array = new byte[len / 2];
+		for (int i = 0; i < len; i += 2) {
+			array[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4) + Character
+					.digit(hexString.charAt(i + 1), 16));
+		}
+		return array;
+	}
+
+	public static String hexToString(final String hexString) {
+		return new String(hexToBytes(hexString));
+	}
+
+	public static byte[] concatenateByteArrays(byte[] a, byte[] b) {
+		byte[] result = new byte[a.length + b.length];
+		System.arraycopy(a, 0, result, 0, a.length);
+		System.arraycopy(b, 0, result, a.length, b.length);
+		return result;
+	}
+
+	public static String randomMucName(SecureRandom random) {
+		return randomWord(3, random) + "." + randomWord(7, random);
+	}
+
+	private static String randomWord(int lenght, SecureRandom random) {
+		StringBuilder builder = new StringBuilder(lenght);
+		for (int i = 0; i < lenght; ++i) {
+			if (i % 2 == 0) {
+				builder.append(consonants[random.nextInt(consonants.length)]);
+			} else {
+				builder.append(vowels[random.nextInt(vowels.length)]);
+			}
+		}
+		return builder.toString();
+	}
+
+	/**
+	 * Escapes usernames or passwords for SASL.
+	 */
+	public static String saslEscape(final String s) {
+		final StringBuilder sb = new StringBuilder((int) (s.length() * 1.1));
+		for (int i = 0; i < s.length(); i++) {
+			char c = s.charAt(i);
+			switch (c) {
+				case ',':
+					sb.append("=2C");
+					break;
+				case '=':
+					sb.append("=3D");
+					break;
+				default:
+					sb.append(c);
+					break;
+			}
+		}
+		return sb.toString();
+	}
+
+	public static String saslPrep(final String s) {
+		return Normalizer.normalize(s, Normalizer.Form.NFKC);
+	}
+
+	public static String prettifyFingerprint(String fingerprint) {
+		StringBuilder builder = new StringBuilder(fingerprint);
+		builder.insert(8, " ");
+		builder.insert(17, " ");
+		builder.insert(26, " ");
+		builder.insert(35, " ");
+		return builder.toString();
+	}
+
+	public static String[] getOrderedCipherSuites(final String[] platformSupportedCipherSuites) {
+		final Collection<String> cipherSuites = new LinkedHashSet<>(Arrays.asList(Config.ENABLED_CIPHERS));
+		final List<String> platformCiphers = Arrays.asList(platformSupportedCipherSuites);
+		cipherSuites.retainAll(platformCiphers);
+		cipherSuites.addAll(platformCiphers);
+		filterWeakCipherSuites(cipherSuites);
+		return cipherSuites.toArray(new String[cipherSuites.size()]);
+	}
+
+	private static void filterWeakCipherSuites(final Collection<String> cipherSuites) {
+		final Iterator<String> it = cipherSuites.iterator();
+		while (it.hasNext()) {
+			String cipherName = it.next();
+			// remove all ciphers with no or very weak encryption or no authentication
+			for (String weakCipherPattern : Config.WEAK_CIPHER_PATTERNS) {
+				if (cipherName.contains(weakCipherPattern)) {
+					it.remove();
+					break;
+				}
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
new file mode 100644
index 00000000..1eedfdfd
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/DNSHelper.java
@@ -0,0 +1,183 @@
+package de.thedevstack.conversationsplus.utils;
+
+import de.measite.minidns.Client;
+import de.measite.minidns.DNSMessage;
+import de.measite.minidns.Record;
+import de.measite.minidns.Record.TYPE;
+import de.measite.minidns.Record.CLASS;
+import de.measite.minidns.record.SRV;
+import de.measite.minidns.record.A;
+import de.measite.minidns.record.AAAA;
+import de.measite.minidns.record.Data;
+import de.measite.minidns.util.NameUtil;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.SocketTimeoutException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Random;
+import java.util.TreeMap;
+
+import android.os.Bundle;
+import android.util.Log;
+
+public class DNSHelper {
+	protected static Client client = new Client();
+
+	public static Bundle getSRVRecord(final Jid jid) throws IOException {
+        final String host = jid.getDomainpart();
+		String dns[] = client.findDNS();
+
+		if (dns != null) {
+			for (String dnsserver : dns) {
+				InetAddress ip = InetAddress.getByName(dnsserver);
+				Bundle b = queryDNS(host, ip);
+				if (b.containsKey("values")) {
+					return b;
+				} else if (b.containsKey("error")
+						&& "nosrv".equals(b.getString("error", null))) {
+					return b;
+				}
+			}
+		}
+		return queryDNS(host, InetAddress.getByName("8.8.8.8"));
+	}
+
+	public static Bundle queryDNS(String host, InetAddress dnsServer) {
+		Bundle bundle = new Bundle();
+		try {
+			String qname = "_xmpp-client._tcp." + host;
+			Log.d(Config.LOGTAG,
+					"using dns server: " + dnsServer.getHostAddress()
+							+ " to look up " + host);
+			DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN,
+					dnsServer.getHostAddress());
+
+			// How should we handle priorities and weight?
+			// Wikipedia has a nice article about priorities vs. weights:
+			// https://en.wikipedia.org/wiki/SRV_record#Provisioning_for_high_service_availability
+
+			// we bucket the SRV records based on priority, pick per priority
+			// a random order respecting the weight, and dump that priority by
+			// priority
+
+			TreeMap<Integer, ArrayList<SRV>> priorities = new TreeMap<>();
+			TreeMap<String, ArrayList<String>> ips4 = new TreeMap<>();
+			TreeMap<String, ArrayList<String>> ips6 = new TreeMap<>();
+
+			for (Record[] rrset : new Record[][] { message.getAnswers(),
+					message.getAdditionalResourceRecords() }) {
+				for (Record rr : rrset) {
+					Data d = rr.getPayload();
+					if (d instanceof SRV
+							&& NameUtil.idnEquals(qname, rr.getName())) {
+						SRV srv = (SRV) d;
+						if (!priorities.containsKey(srv.getPriority())) {
+							priorities.put(srv.getPriority(),
+									new ArrayList<SRV>(2));
+						}
+						priorities.get(srv.getPriority()).add(srv);
+					}
+					if (d instanceof A) {
+						A arecord = (A) d;
+						if (!ips4.containsKey(rr.getName())) {
+							ips4.put(rr.getName(), new ArrayList<String>(3));
+						}
+						ips4.get(rr.getName()).add(arecord.toString());
+					}
+					if (d instanceof AAAA) {
+						AAAA aaaa = (AAAA) d;
+						if (!ips6.containsKey(rr.getName())) {
+							ips6.put(rr.getName(), new ArrayList<String>(3));
+						}
+						ips6.get(rr.getName()).add("[" + aaaa.toString() + "]");
+					}
+				}
+			}
+
+			Random rnd = new Random();
+			ArrayList<SRV> result = new ArrayList<>(
+					priorities.size() * 2 + 1);
+			for (ArrayList<SRV> s : priorities.values()) {
+
+				// trivial case
+				if (s.size() <= 1) {
+					result.addAll(s);
+					continue;
+				}
+
+				long totalweight = 0l;
+				for (SRV srv : s) {
+					totalweight += srv.getWeight();
+				}
+
+				while (totalweight > 0l && s.size() > 0) {
+					long p = (rnd.nextLong() & 0x7fffffffffffffffl)
+							% totalweight;
+					int i = 0;
+					while (p > 0) {
+						p -= s.get(i++).getPriority();
+					}
+					i--;
+					// remove is expensive, but we have only a few entries
+					// anyway
+					SRV srv = s.remove(i);
+					totalweight -= srv.getWeight();
+					result.add(srv);
+				}
+
+				Collections.shuffle(s, rnd);
+				result.addAll(s);
+
+			}
+
+			if (result.size() == 0) {
+				bundle.putString("error", "nosrv");
+				return bundle;
+			}
+			ArrayList<Bundle> values = new ArrayList<>();
+			for (SRV srv : result) {
+				if (ips6.containsKey(srv.getName())) {
+					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips6));
+				}
+				if (ips4.containsKey(srv.getName())) {
+					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips4));
+				}
+				values.add(createNamePortBundle(srv.getName(),srv.getPort(),null));
+			}
+			bundle.putParcelableArrayList("values", values);
+		} catch (SocketTimeoutException e) {
+			bundle.putString("error", "timeout");
+		} catch (Exception e) {
+			bundle.putString("error", "unhandled");
+		}
+		return bundle;
+	}
+
+	private static Bundle createNamePortBundle(String name, int port, TreeMap<String, ArrayList<String>> ips) {
+		Bundle namePort = new Bundle();
+		namePort.putString("name", name);
+		namePort.putInt("port", port);
+		if (ips!=null) {
+			ArrayList<String> ip = ips.get(name);
+			Collections.shuffle(ip, new Random());
+			namePort.putString("ip", ip.get(0));
+		}
+		return namePort;
+	}
+
+	final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
+
+	public static String bytesToHex(byte[] bytes) {
+		char[] hexChars = new char[bytes.length * 2];
+		for (int j = 0; j < bytes.length; j++) {
+			int v = bytes[j] & 0xFF;
+			hexChars[j * 2] = hexArray[v >>> 4];
+			hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+		}
+		return new String(hexChars);
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java
new file mode 100644
index 00000000..256287f1
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHandler.java
@@ -0,0 +1,46 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.lang.Thread.UncaughtExceptionHandler;
+
+import android.content.Context;
+
+public class ExceptionHandler implements UncaughtExceptionHandler {
+
+	private UncaughtExceptionHandler defaultHandler;
+	private Context context;
+
+	public ExceptionHandler(Context context) {
+		this.context = context;
+		this.defaultHandler = Thread.getDefaultUncaughtExceptionHandler();
+	}
+
+	@Override
+	public void uncaughtException(Thread thread, Throwable ex) {
+		Writer result = new StringWriter();
+		PrintWriter printWriter = new PrintWriter(result);
+		ex.printStackTrace(printWriter);
+		String stacktrace = result.toString();
+		printWriter.close();
+		try {
+			OutputStream os = context.openFileOutput("stacktrace.txt",
+					Context.MODE_PRIVATE);
+			os.write(stacktrace.getBytes());
+			os.flush();
+			os.close();
+		} catch (FileNotFoundException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		this.defaultHandler.uncaughtException(thread, ex);
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java
new file mode 100644
index 00000000..492c65d2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExceptionHelper.java
@@ -0,0 +1,119 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.DialogInterface.OnClickListener;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.preference.PreferenceManager;
+import android.text.format.DateUtils;
+import android.util.Log;
+
+public class ExceptionHelper {
+	public static void init(Context context) {
+		if (!(Thread.getDefaultUncaughtExceptionHandler() instanceof ExceptionHandler)) {
+			Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(
+					context));
+		}
+	}
+
+	public static void checkForCrash(Context context,
+			final XmppConnectionService service) {
+		try {
+			final SharedPreferences preferences = PreferenceManager
+					.getDefaultSharedPreferences(context);
+			boolean neverSend = preferences.getBoolean("never_send", false);
+			if (neverSend) {
+				return;
+			}
+			List<Account> accounts = service.getAccounts();
+			Account account = null;
+			for (int i = 0; i < accounts.size(); ++i) {
+				if (!accounts.get(i).isOptionSet(Account.OPTION_DISABLED)) {
+					account = accounts.get(i);
+					break;
+				}
+			}
+			if (account == null) {
+				return;
+			}
+			final Account finalAccount = account;
+			FileInputStream file = context.openFileInput("stacktrace.txt");
+			InputStreamReader inputStreamReader = new InputStreamReader(file);
+			BufferedReader stacktrace = new BufferedReader(inputStreamReader);
+			final StringBuilder report = new StringBuilder();
+			PackageManager pm = context.getPackageManager();
+			PackageInfo packageInfo = null;
+			try {
+				packageInfo = pm.getPackageInfo(context.getPackageName(), 0);
+				report.append("Version: " + packageInfo.versionName + '\n');
+				report.append("Last Update: "
+						+ DateUtils.formatDateTime(context,
+								packageInfo.lastUpdateTime,
+								DateUtils.FORMAT_SHOW_TIME
+										| DateUtils.FORMAT_SHOW_DATE) + '\n');
+			} catch (NameNotFoundException e) {
+			}
+			String line;
+			while ((line = stacktrace.readLine()) != null) {
+				report.append(line);
+				report.append('\n');
+			}
+			file.close();
+			context.deleteFile("stacktrace.txt");
+			AlertDialog.Builder builder = new AlertDialog.Builder(context);
+			builder.setTitle(context.getString(R.string.crash_report_title));
+			builder.setMessage(context.getText(R.string.crash_report_message));
+			builder.setPositiveButton(context.getText(R.string.send_now),
+					new OnClickListener() {
+
+						@Override
+						public void onClick(DialogInterface dialog, int which) {
+
+							Log.d(Config.LOGTAG, "using account="
+									+ finalAccount.getJid().toBareJid()
+									+ " to send in stack trace");
+                            Conversation conversation = null;
+                            try {
+                                conversation = service.findOrCreateConversation(finalAccount,
+                                        Jid.fromString("bugs@siacs.eu"), false);
+                            } catch (final InvalidJidException ignored) {
+                            }
+                            Message message = new Message(conversation, report
+									.toString(), Message.ENCRYPTION_NONE);
+							service.sendMessage(message);
+						}
+					});
+			builder.setNegativeButton(context.getText(R.string.send_never),
+					new OnClickListener() {
+
+						@Override
+						public void onClick(DialogInterface dialog, int which) {
+							preferences.edit().putBoolean("never_send", true)
+									.apply();
+						}
+					});
+			builder.create().show();
+		} catch (final IOException ignored) {
+        }
+
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java
new file mode 100644
index 00000000..13aff60d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/ExifHelper.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.thedevstack.conversationsplus.utils;
+
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class ExifHelper {
+    private static final String TAG = "CameraExif";
+
+    public static int getOrientation(InputStream is) {
+        if (is == null) {
+            return 0;
+        }
+
+        byte[] buf = new byte[8];
+        int length = 0;
+
+        // ISO/IEC 10918-1:1993(E)
+        while (read(is, buf, 2) && (buf[0] & 0xFF) == 0xFF) {
+            int marker = buf[1] & 0xFF;
+
+            // Check if the marker is a padding.
+            if (marker == 0xFF) {
+                continue;
+            }
+
+            // Check if the marker is SOI or TEM.
+            if (marker == 0xD8 || marker == 0x01) {
+                continue;
+            }
+            // Check if the marker is EOI or SOS.
+            if (marker == 0xD9 || marker == 0xDA) {
+                return 0;
+            }
+
+            // Get the length and check if it is reasonable.
+            if (!read(is, buf, 2)) {
+                return 0;
+            }
+            length = pack(buf, 0, 2, false);
+            if (length < 2) {
+                Log.e(TAG, "Invalid length");
+                return 0;
+            }
+            length -= 2;
+
+            // Break if the marker is EXIF in APP1.
+            if (marker == 0xE1 && length >= 6) {
+                if (!read(is, buf, 6)) return 0;
+                length -= 6;
+                if (pack(buf, 0, 4, false) == 0x45786966 &&
+                    pack(buf, 4, 2, false) == 0) {
+                    break;
+                }
+            }
+
+            // Skip other markers.
+            try {
+                is.skip(length);
+            } catch (IOException ex) {
+                return 0;
+            }
+            length = 0;
+        }
+
+        // JEITA CP-3451 Exif Version 2.2
+        if (length > 8) {
+            int offset = 0;
+            byte[] jpeg = new byte[length];
+            if (!read(is, jpeg, length)) {
+                return 0;
+            }
+
+            // Identify the byte order.
+            int tag = pack(jpeg, offset, 4, false);
+            if (tag != 0x49492A00 && tag != 0x4D4D002A) {
+                Log.e(TAG, "Invalid byte order");
+                return 0;
+            }
+            boolean littleEndian = (tag == 0x49492A00);
+
+            // Get the offset and check if it is reasonable.
+            int count = pack(jpeg, offset + 4, 4, littleEndian) + 2;
+            if (count < 10 || count > length) {
+                Log.e(TAG, "Invalid offset");
+                return 0;
+            }
+            offset += count;
+            length -= count;
+
+            // Get the count and go through all the elements.
+            count = pack(jpeg, offset - 2, 2, littleEndian);
+            while (count-- > 0 && length >= 12) {
+                // Get the tag and check if it is orientation.
+                tag = pack(jpeg, offset, 2, littleEndian);
+                if (tag == 0x0112) {
+                    // We do not really care about type and count, do we?
+                    int orientation = pack(jpeg, offset + 8, 2, littleEndian);
+                    switch (orientation) {
+                        case 1:
+                            return 0;
+                        case 3:
+                            return 180;
+                        case 6:
+                            return 90;
+                        case 8:
+                            return 270;
+                    }
+                    Log.i(TAG, "Unsupported orientation");
+                    return 0;
+                }
+                offset += 12;
+                length -= 12;
+            }
+        }
+
+        Log.i(TAG, "Orientation not found");
+        return 0;
+    }
+
+    private static int pack(byte[] bytes, int offset, int length,
+            boolean littleEndian) {
+        int step = 1;
+        if (littleEndian) {
+            offset += length - 1;
+            step = -1;
+        }
+
+        int value = 0;
+        while (length-- > 0) {
+            value = (value << 8) | (bytes[offset] & 0xFF);
+            offset += step;
+        }
+        return value;
+    }
+
+    private static boolean read(InputStream is, byte[] buf, int length) {
+        try {
+            return is.read(buf, 0, length) == length;
+        } catch (IOException ex) {
+            return false;
+        }
+    }
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/GeoHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/GeoHelper.java
new file mode 100644
index 00000000..87c16f8c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/GeoHelper.java
@@ -0,0 +1,71 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.content.Intent;
+import android.net.Uri;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Message;
+
+public class GeoHelper {
+	private static Pattern GEO_URI = Pattern.compile("geo:([\\-0-9.]+),([\\-0-9.]+)(?:,([\\-0-9.]+))?(?:\\?(.*))?", Pattern.CASE_INSENSITIVE);
+
+	public static boolean isGeoUri(String body) {
+		return body != null && GEO_URI.matcher(body).matches();
+	}
+
+	public static ArrayList<Intent> createGeoIntentsFromMessage(Message message) {
+		final ArrayList<Intent> intents = new ArrayList();
+		Matcher matcher = GEO_URI.matcher(message.getBody());
+		if (!matcher.matches()) {
+			return intents;
+		}
+		double latitude;
+		double longitude;
+		try {
+			latitude = Double.parseDouble(matcher.group(1));
+			if (latitude > 90.0 || latitude < -90.0) {
+				return intents;
+			}
+			longitude = Double.parseDouble(matcher.group(2));
+			if (longitude > 180.0 || longitude < -180.0) {
+				return intents;
+			}
+		} catch (NumberFormatException nfe) {
+			return intents;
+		}
+		final Conversation conversation = message.getConversation();
+		String label;
+		if (conversation.getMode() == Conversation.MODE_SINGLE && message.getStatus() == Message.STATUS_RECEIVED) {
+			try {
+				label = "(" + URLEncoder.encode(message.getConversation().getName(), "UTF-8") + ")";
+			} catch (UnsupportedEncodingException e) {
+				label = "";
+			}
+		} else {
+			label = "";
+		}
+
+		Intent locationPluginIntent = new Intent("eu.siacs.conversations.location.show");
+		locationPluginIntent.putExtra("latitude",latitude);
+		locationPluginIntent.putExtra("longitude",longitude);
+		if (conversation.getMode() == Conversation.MODE_SINGLE && message.getStatus() == Message.STATUS_RECEIVED) {
+			locationPluginIntent.putExtra("name",conversation.getName());
+		}
+		intents.add(locationPluginIntent);
+
+		Intent geoIntent = new Intent(Intent.ACTION_VIEW);
+		geoIntent.setData(Uri.parse("geo:" + String.valueOf(latitude) + "," + String.valueOf(longitude) + "?q=" + String.valueOf(latitude) + "," + String.valueOf(longitude) + label));
+		intents.add(geoIntent);
+
+		Intent httpIntent = new Intent(Intent.ACTION_VIEW);
+		httpIntent.setData(Uri.parse("https://maps.google.com/maps?q=loc:"+String.valueOf(latitude) + "," + String.valueOf(longitude) +label));
+		intents.add(httpIntent);
+		return intents;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java b/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java
new file mode 100644
index 00000000..e701d62b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/OnPhoneContactsLoadedListener.java
@@ -0,0 +1,9 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.util.List;
+
+import android.os.Bundle;
+
+public interface OnPhoneContactsLoadedListener {
+	public void onPhoneContactsLoaded(List<Bundle> phoneContacts);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/PRNGFixes.java b/src/main/java/de/thedevstack/conversationsplus/utils/PRNGFixes.java
new file mode 100644
index 00000000..78776aeb
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/PRNGFixes.java
@@ -0,0 +1,327 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.os.Build;
+import android.os.Process;
+import android.util.Log;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.security.NoSuchAlgorithmException;
+import java.security.Provider;
+import java.security.SecureRandom;
+import java.security.SecureRandomSpi;
+import java.security.Security;
+
+/**
+ * Fixes for the output of the default PRNG having low entropy.
+ * 
+ * The fixes need to be applied via {@link #apply()} before any use of Java
+ * Cryptography Architecture primitives. A good place to invoke them is in the
+ * application's {@code onCreate}.
+ */
+public final class PRNGFixes {
+
+	private static final int VERSION_CODE_JELLY_BEAN = 16;
+	private static final int VERSION_CODE_JELLY_BEAN_MR2 = 18;
+	private static final byte[] BUILD_FINGERPRINT_AND_DEVICE_SERIAL = getBuildFingerprintAndDeviceSerial();
+
+	/** Hidden constructor to prevent instantiation. */
+	private PRNGFixes() {
+	}
+
+	/**
+	 * Applies all fixes.
+	 * 
+	 * @throws SecurityException
+	 *             if a fix is needed but could not be applied.
+	 */
+	public static void apply() {
+		applyOpenSSLFix();
+		installLinuxPRNGSecureRandom();
+	}
+
+	/**
+	 * Applies the fix for OpenSSL PRNG having low entropy. Does nothing if the
+	 * fix is not needed.
+	 * 
+	 * @throws SecurityException
+	 *             if the fix is needed but could not be applied.
+	 */
+	private static void applyOpenSSLFix() throws SecurityException {
+		if ((Build.VERSION.SDK_INT < VERSION_CODE_JELLY_BEAN)
+				|| (Build.VERSION.SDK_INT > VERSION_CODE_JELLY_BEAN_MR2)) {
+			// No need to apply the fix
+			return;
+		}
+
+		try {
+			// Mix in the device- and invocation-specific seed.
+			Class.forName("org.apache.harmony.xnet.provider.jsse.NativeCrypto")
+					.getMethod("RAND_seed", byte[].class)
+					.invoke(null, generateSeed());
+
+			// Mix output of Linux PRNG into OpenSSL's PRNG
+			int bytesRead = (Integer) Class
+					.forName(
+							"org.apache.harmony.xnet.provider.jsse.NativeCrypto")
+					.getMethod("RAND_load_file", String.class, long.class)
+					.invoke(null, "/dev/urandom", 1024);
+			if (bytesRead != 1024) {
+				throw new IOException(
+						"Unexpected number of bytes read from Linux PRNG: "
+								+ bytesRead);
+			}
+		} catch (Exception e) {
+			throw new SecurityException("Failed to seed OpenSSL PRNG", e);
+		}
+	}
+
+	/**
+	 * Installs a Linux PRNG-backed {@code SecureRandom} implementation as the
+	 * default. Does nothing if the implementation is already the default or if
+	 * there is not need to install the implementation.
+	 * 
+	 * @throws SecurityException
+	 *             if the fix is needed but could not be applied.
+	 */
+	private static void installLinuxPRNGSecureRandom() throws SecurityException {
+		if (Build.VERSION.SDK_INT > VERSION_CODE_JELLY_BEAN_MR2) {
+			// No need to apply the fix
+			return;
+		}
+
+		// Install a Linux PRNG-based SecureRandom implementation as the
+		// default, if not yet installed.
+		Provider[] secureRandomProviders = Security
+				.getProviders("SecureRandom.SHA1PRNG");
+		if ((secureRandomProviders == null)
+				|| (secureRandomProviders.length < 1)
+				|| (!LinuxPRNGSecureRandomProvider.class
+						.equals(secureRandomProviders[0].getClass()))) {
+			Security.insertProviderAt(new LinuxPRNGSecureRandomProvider(), 1);
+		}
+
+		// Assert that new SecureRandom() and
+		// SecureRandom.getInstance("SHA1PRNG") return a SecureRandom backed
+		// by the Linux PRNG-based SecureRandom implementation.
+		SecureRandom rng1 = new SecureRandom();
+		if (!LinuxPRNGSecureRandomProvider.class.equals(rng1.getProvider()
+				.getClass())) {
+			throw new SecurityException(
+					"new SecureRandom() backed by wrong Provider: "
+							+ rng1.getProvider().getClass());
+		}
+
+		SecureRandom rng2;
+		try {
+			rng2 = SecureRandom.getInstance("SHA1PRNG");
+		} catch (NoSuchAlgorithmException e) {
+			throw new SecurityException("SHA1PRNG not available", e);
+		}
+		if (!LinuxPRNGSecureRandomProvider.class.equals(rng2.getProvider()
+				.getClass())) {
+			throw new SecurityException(
+					"SecureRandom.getInstance(\"SHA1PRNG\") backed by wrong"
+							+ " Provider: " + rng2.getProvider().getClass());
+		}
+	}
+
+	/**
+	 * {@code Provider} of {@code SecureRandom} engines which pass through all
+	 * requests to the Linux PRNG.
+	 */
+	private static class LinuxPRNGSecureRandomProvider extends Provider {
+
+		public LinuxPRNGSecureRandomProvider() {
+			super("LinuxPRNG", 1.0,
+					"A Linux-specific random number provider that uses"
+							+ " /dev/urandom");
+			// Although /dev/urandom is not a SHA-1 PRNG, some apps
+			// explicitly request a SHA1PRNG SecureRandom and we thus need to
+			// prevent them from getting the default implementation whose output
+			// may have low entropy.
+			put("SecureRandom.SHA1PRNG", LinuxPRNGSecureRandom.class.getName());
+			put("SecureRandom.SHA1PRNG ImplementedIn", "Software");
+		}
+	}
+
+	/**
+	 * {@link SecureRandomSpi} which passes all requests to the Linux PRNG (
+	 * {@code /dev/urandom}).
+	 */
+	public static class LinuxPRNGSecureRandom extends SecureRandomSpi {
+
+		/*
+		 * IMPLEMENTATION NOTE: Requests to generate bytes and to mix in a seed
+		 * are passed through to the Linux PRNG (/dev/urandom). Instances of
+		 * this class seed themselves by mixing in the current time, PID, UID,
+		 * build fingerprint, and hardware serial number (where available) into
+		 * Linux PRNG.
+		 * 
+		 * Concurrency: Read requests to the underlying Linux PRNG are
+		 * serialized (on sLock) to ensure that multiple threads do not get
+		 * duplicated PRNG output.
+		 */
+
+		private static final File URANDOM_FILE = new File("/dev/urandom");
+
+		private static final Object sLock = new Object();
+
+		/**
+		 * Input stream for reading from Linux PRNG or {@code null} if not yet
+		 * opened.
+		 * 
+		 * @GuardedBy("sLock")
+		 */
+		private static DataInputStream sUrandomIn;
+
+		/**
+		 * Output stream for writing to Linux PRNG or {@code null} if not yet
+		 * opened.
+		 * 
+		 * @GuardedBy("sLock")
+		 */
+		private static OutputStream sUrandomOut;
+
+		/**
+		 * Whether this engine instance has been seeded. This is needed because
+		 * each instance needs to seed itself if the client does not explicitly
+		 * seed it.
+		 */
+		private boolean mSeeded;
+
+		@Override
+		protected void engineSetSeed(byte[] bytes) {
+			try {
+				OutputStream out;
+				synchronized (sLock) {
+					out = getUrandomOutputStream();
+				}
+				out.write(bytes);
+				out.flush();
+			} catch (IOException e) {
+				// On a small fraction of devices /dev/urandom is not writable.
+				// Log and ignore.
+				Log.w(PRNGFixes.class.getSimpleName(),
+						"Failed to mix seed into " + URANDOM_FILE);
+			} finally {
+				mSeeded = true;
+			}
+		}
+
+		@Override
+		protected void engineNextBytes(byte[] bytes) {
+			if (!mSeeded) {
+				// Mix in the device- and invocation-specific seed.
+				engineSetSeed(generateSeed());
+			}
+
+			try {
+				DataInputStream in;
+				synchronized (sLock) {
+					in = getUrandomInputStream();
+				}
+				synchronized (in) {
+					in.readFully(bytes);
+				}
+			} catch (IOException e) {
+				throw new SecurityException("Failed to read from "
+						+ URANDOM_FILE, e);
+			}
+		}
+
+		@Override
+		protected byte[] engineGenerateSeed(int size) {
+			byte[] seed = new byte[size];
+			engineNextBytes(seed);
+			return seed;
+		}
+
+		private DataInputStream getUrandomInputStream() {
+			synchronized (sLock) {
+				if (sUrandomIn == null) {
+					// NOTE: Consider inserting a BufferedInputStream between
+					// DataInputStream and FileInputStream if you need higher
+					// PRNG output performance and can live with future PRNG
+					// output being pulled into this process prematurely.
+					try {
+						sUrandomIn = new DataInputStream(new FileInputStream(
+								URANDOM_FILE));
+					} catch (IOException e) {
+						throw new SecurityException("Failed to open "
+								+ URANDOM_FILE + " for reading", e);
+					}
+				}
+				return sUrandomIn;
+			}
+		}
+
+		private OutputStream getUrandomOutputStream() throws IOException {
+			synchronized (sLock) {
+				if (sUrandomOut == null) {
+					sUrandomOut = new FileOutputStream(URANDOM_FILE);
+				}
+				return sUrandomOut;
+			}
+		}
+	}
+
+	/**
+	 * Generates a device- and invocation-specific seed to be mixed into the
+	 * Linux PRNG.
+	 */
+	private static byte[] generateSeed() {
+		try {
+			ByteArrayOutputStream seedBuffer = new ByteArrayOutputStream();
+			DataOutputStream seedBufferOut = new DataOutputStream(seedBuffer);
+			seedBufferOut.writeLong(System.currentTimeMillis());
+			seedBufferOut.writeLong(System.nanoTime());
+			seedBufferOut.writeInt(Process.myPid());
+			seedBufferOut.writeInt(Process.myUid());
+			seedBufferOut.write(BUILD_FINGERPRINT_AND_DEVICE_SERIAL);
+			seedBufferOut.close();
+			return seedBuffer.toByteArray();
+		} catch (IOException e) {
+			throw new SecurityException("Failed to generate seed", e);
+		}
+	}
+
+	/**
+	 * Gets the hardware serial number of this device.
+	 * 
+	 * @return serial number or {@code null} if not available.
+	 */
+	private static String getDeviceSerialNumber() {
+		// We're using the Reflection API because Build.SERIAL is only available
+		// since API Level 9 (Gingerbread, Android 2.3).
+		try {
+			return (String) Build.class.getField("SERIAL").get(null);
+		} catch (Exception ignored) {
+			return null;
+		}
+	}
+
+	private static byte[] getBuildFingerprintAndDeviceSerial() {
+		StringBuilder result = new StringBuilder();
+		String fingerprint = Build.FINGERPRINT;
+		if (fingerprint != null) {
+			result.append(fingerprint);
+		}
+		String serial = getDeviceSerialNumber();
+		if (serial != null) {
+			result.append(serial);
+		}
+		try {
+			return result.toString().getBytes("UTF-8");
+		} catch (UnsupportedEncodingException e) {
+			throw new RuntimeException("UTF-8 encoding not supported");
+		}
+	}
+}
+\ No newline at end of file
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java
new file mode 100644
index 00000000..b49e2183
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/PhoneHelper.java
@@ -0,0 +1,107 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
+
+import android.content.Context;
+import android.content.CursorLoader;
+import android.content.Loader;
+import android.content.Loader.OnLoadCompleteListener;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.ContactsContract;
+import android.provider.ContactsContract.Profile;
+
+public class PhoneHelper {
+
+	public static void loadPhoneContacts(Context context,final List<Bundle> phoneContacts, final OnPhoneContactsLoadedListener listener) {
+		final String[] PROJECTION = new String[] { ContactsContract.Data._ID,
+				ContactsContract.Data.DISPLAY_NAME,
+				ContactsContract.Data.PHOTO_URI,
+				ContactsContract.Data.LOOKUP_KEY,
+				ContactsContract.CommonDataKinds.Im.DATA };
+
+		final String SELECTION = "(" + ContactsContract.Data.MIMETYPE + "=\""
+				+ ContactsContract.CommonDataKinds.Im.CONTENT_ITEM_TYPE
+				+ "\") AND (" + ContactsContract.CommonDataKinds.Im.PROTOCOL
+				+ "=\"" + ContactsContract.CommonDataKinds.Im.PROTOCOL_JABBER
+				+ "\")";
+
+		CursorLoader mCursorLoader = new CursorLoader(context,
+				ContactsContract.Data.CONTENT_URI, PROJECTION, SELECTION, null,
+				null);
+		mCursorLoader.registerListener(0, new OnLoadCompleteListener<Cursor>() {
+
+			@Override
+			public void onLoadComplete(Loader<Cursor> arg0, Cursor cursor) {
+				if (cursor == null) {
+					return;
+				}
+				while (cursor.moveToNext()) {
+					Bundle contact = new Bundle();
+					contact.putInt("phoneid", cursor.getInt(cursor
+							.getColumnIndex(ContactsContract.Data._ID)));
+					contact.putString(
+							"displayname",
+							cursor.getString(cursor
+									.getColumnIndex(ContactsContract.Data.DISPLAY_NAME)));
+					contact.putString("photouri", cursor.getString(cursor
+							.getColumnIndex(ContactsContract.Data.PHOTO_URI)));
+					contact.putString("lookup", cursor.getString(cursor
+							.getColumnIndex(ContactsContract.Data.LOOKUP_KEY)));
+
+					contact.putString(
+							"jid",
+							cursor.getString(cursor
+									.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA)));
+					phoneContacts.add(contact);
+				}
+				if (listener != null) {
+					listener.onPhoneContactsLoaded(phoneContacts);
+				}
+				cursor.close();
+			}
+		});
+		try {
+			mCursorLoader.startLoading();
+		} catch (RejectedExecutionException e) {
+			if (listener != null) {
+				listener.onPhoneContactsLoaded(phoneContacts);
+			}
+		}
+	}
+
+	public static Uri getSefliUri(Context context) {
+		String[] mProjection = new String[] { Profile._ID, Profile.PHOTO_URI };
+		Cursor mProfileCursor = context.getContentResolver().query(
+				Profile.CONTENT_URI, mProjection, null, null, null);
+
+		if (mProfileCursor == null || mProfileCursor.getCount() == 0) {
+			return null;
+		} else {
+			mProfileCursor.moveToFirst();
+			String uri = mProfileCursor.getString(1);
+			mProfileCursor.close();
+			if (uri == null) {
+				return null;
+			} else {
+				return Uri.parse(uri);
+			}
+		}
+	}
+
+	public static String getVersionName(Context context) {
+		final String packageName = context == null ? null : context.getPackageName();
+		if (packageName != null) {
+			try {
+				return context.getPackageManager().getPackageInfo(packageName, 0).versionName;
+			} catch (final PackageManager.NameNotFoundException e) {
+				return "unknown";
+			}
+		} else {
+			return "unknown";
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
new file mode 100644
index 00000000..bda3f770
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
@@ -0,0 +1,366 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.net.URLConnection;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.R;
+import de.thedevstack.conversationsplus.entities.Contact;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import android.content.Context;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+import android.text.Spannable.Factory;
+import android.text.style.ImageSpan;
+import android.text.Spannable;
+import android.util.Pair;
+
+public class UIHelper {
+	private static final int SHORT_DATE_FLAGS = DateUtils.FORMAT_SHOW_DATE
+		| DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL;
+	private static final int FULL_DATE_FLAGS = DateUtils.FORMAT_SHOW_TIME
+		| DateUtils.FORMAT_ABBREV_ALL | DateUtils.FORMAT_SHOW_DATE;
+
+	public static String readableTimeDifference(Context context, long time) {
+		return readableTimeDifference(context, time, false);
+	}
+
+	public static String readableTimeDifferenceFull(Context context, long time) {
+		return readableTimeDifference(context, time, true);
+	}
+
+	private static String readableTimeDifference(Context context, long time,
+			boolean fullDate) {
+		if (time == 0) {
+			return context.getString(R.string.just_now);
+		}
+		Date date = new Date(time);
+		long difference = (System.currentTimeMillis() - time) / 1000;
+		if (difference < 60) {
+			return context.getString(R.string.just_now);
+		} else if (difference < 60 * 2) {
+			return context.getString(R.string.minute_ago);
+		} else if (difference < 60 * 15) {
+			return context.getString(R.string.minutes_ago,
+					Math.round(difference / 60.0));
+		} else if (today(date)) {
+			java.text.DateFormat df = DateFormat.getTimeFormat(context);
+			return df.format(date);
+		} else {
+			if (fullDate) {
+				return DateUtils.formatDateTime(context, date.getTime(),
+						FULL_DATE_FLAGS);
+			} else {
+				return DateUtils.formatDateTime(context, date.getTime(),
+						SHORT_DATE_FLAGS);
+			}
+		}
+	}
+
+	private static boolean today(Date date) {
+		return sameDay(date,new Date(System.currentTimeMillis()));
+	}
+
+	public static boolean sameDay(long timestamp1, long timestamp2) {
+		return sameDay(new Date(timestamp1),new Date(timestamp2));
+	}
+
+	private static boolean sameDay(Date a, Date b) {
+		Calendar cal1 = Calendar.getInstance();
+		Calendar cal2 = Calendar.getInstance();
+		cal1.setTime(a);
+		cal2.setTime(b);
+		return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
+			&& cal1.get(Calendar.DAY_OF_YEAR) == cal2
+			.get(Calendar.DAY_OF_YEAR);
+	}
+
+	public static String lastseen(Context context, long time) {
+		if (time == 0) {
+			return context.getString(R.string.never_seen);
+		}
+		long difference = (System.currentTimeMillis() - time) / 1000;
+		if (difference < 60) {
+			return context.getString(R.string.last_seen_now);
+		} else if (difference < 60 * 2) {
+			return context.getString(R.string.last_seen_min);
+		} else if (difference < 60 * 60) {
+			return context.getString(R.string.last_seen_mins,
+					Math.round(difference / 60.0));
+		} else if (difference < 60 * 60 * 2) {
+			return context.getString(R.string.last_seen_hour);
+		} else if (difference < 60 * 60 * 24) {
+			return context.getString(R.string.last_seen_hours,
+					Math.round(difference / (60.0 * 60.0)));
+		} else if (difference < 60 * 60 * 48) {
+			return context.getString(R.string.last_seen_day);
+		} else {
+			return context.getString(R.string.last_seen_days,
+					Math.round(difference / (60.0 * 60.0 * 24.0)));
+		}
+	}
+
+	public static final Map<Pattern, Integer> ANDROID_EMOTICONS = new HashMap<Pattern, Integer>();
+
+	private static final Factory spannableFactory = Spannable.Factory
+			.getInstance();
+	
+	static {
+		addPattern(ANDROID_EMOTICONS, ":)", R.drawable.emo_im_happy);
+		addPattern(ANDROID_EMOTICONS, ":-)", R.drawable.emo_im_happy);
+		addPattern(ANDROID_EMOTICONS, ":(", R.drawable.emo_im_sad);
+		addPattern(ANDROID_EMOTICONS, ":-(", R.drawable.emo_im_sad);
+		addPattern(ANDROID_EMOTICONS, ";)", R.drawable.emo_im_winking);
+		addPattern(ANDROID_EMOTICONS, ";-)", R.drawable.emo_im_winking);
+		addPattern(ANDROID_EMOTICONS, ":P",
+				R.drawable.emo_im_tongue_sticking_out);
+		addPattern(ANDROID_EMOTICONS, ":-P",
+				R.drawable.emo_im_tongue_sticking_out);
+		addPattern(ANDROID_EMOTICONS, "=-O", R.drawable.emo_im_surprised);
+		addPattern(ANDROID_EMOTICONS, ":*", R.drawable.emo_im_kissing);
+		addPattern(ANDROID_EMOTICONS, ":-*", R.drawable.emo_im_kissing);
+		addPattern(ANDROID_EMOTICONS, ":O", R.drawable.emo_im_wtf);
+		addPattern(ANDROID_EMOTICONS, ":-O", R.drawable.emo_im_wtf);
+		addPattern(ANDROID_EMOTICONS, "B)", R.drawable.emo_im_cool);
+		addPattern(ANDROID_EMOTICONS, "B-)", R.drawable.emo_im_cool);
+		addPattern(ANDROID_EMOTICONS, "8)", R.drawable.emo_im_cool);
+		addPattern(ANDROID_EMOTICONS, "8-)", R.drawable.emo_im_cool);
+		addPattern(ANDROID_EMOTICONS, ":$", R.drawable.emo_im_money_mouth);
+		addPattern(ANDROID_EMOTICONS, ":-$", R.drawable.emo_im_money_mouth);
+		addPattern(ANDROID_EMOTICONS, ":-!", R.drawable.emo_im_foot_in_mouth);
+		addPattern(ANDROID_EMOTICONS, ":-[", R.drawable.emo_im_embarrassed);
+		addPattern(ANDROID_EMOTICONS, "O:)", R.drawable.emo_im_angel);
+		addPattern(ANDROID_EMOTICONS, "O:-)", R.drawable.emo_im_angel);
+		addPattern(ANDROID_EMOTICONS, ":\\", R.drawable.emo_im_undecided);
+		addPattern(ANDROID_EMOTICONS, ":-\\", R.drawable.emo_im_undecided);
+		addPattern(ANDROID_EMOTICONS, ":'(", R.drawable.emo_im_crying);
+		addPattern(ANDROID_EMOTICONS, ":D", R.drawable.emo_im_laughing);
+		addPattern(ANDROID_EMOTICONS, ":-D", R.drawable.emo_im_laughing);
+		addPattern(ANDROID_EMOTICONS, "O_o", R.drawable.emo_im_wtf);
+		addPattern(ANDROID_EMOTICONS, "o_O", R.drawable.emo_im_wtf);
+		addPattern(ANDROID_EMOTICONS, ">:O", R.drawable.emo_im_yelling);
+		addPattern(ANDROID_EMOTICONS, ">:0", R.drawable.emo_im_yelling);
+		addPattern(ANDROID_EMOTICONS, ":S", R.drawable.emo_im_lips_are_sealed);
+		addPattern(ANDROID_EMOTICONS, ":-S", R.drawable.emo_im_lips_are_sealed);
+		addPattern(ANDROID_EMOTICONS, "<3", R.drawable.emo_im_heart);
+	}
+ 
+	private static void addPattern(Map<Pattern, Integer> map, String smile,
+			int resource) {
+		map.put(Pattern.compile(Pattern.quote(smile)), resource);
+	}
+	
+	private static boolean getSmiledText(Context context, Spannable spannable) {
+		boolean hasChanges = false;
+		Map<Pattern, Integer> emoticons = ANDROID_EMOTICONS;
+		for (Entry<Pattern, Integer> entry : emoticons.entrySet()) {
+			Matcher matcher = entry.getKey().matcher(spannable);
+			while (matcher.find()) {
+				boolean set = true;
+				for (ImageSpan span : spannable.getSpans(matcher.start(),
+						matcher.end(), ImageSpan.class))
+					if (spannable.getSpanStart(span) >= matcher.start()
+							&& spannable.getSpanEnd(span) <= matcher.end())
+						spannable.removeSpan(span);
+					else {
+						set = false;
+						break;
+					}
+				if (set) {
+					spannable.setSpan(new ImageSpan(context, entry.getValue()),
+							matcher.start(), matcher.end(),
+							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+					hasChanges = true;
+				}
+			}
+		}
+		return hasChanges;
+	}
+
+	private final static class EmoticonPattern {
+		Pattern pattern;
+		String replacement;
+
+		EmoticonPattern(String ascii, int unicode) {
+			this.pattern = Pattern.compile("(?<=(^|\\s))" + ascii
+					+ "(?=(\\s|$))");
+			this.replacement = new String(new int[] { unicode, }, 0, 1);
+		}
+
+		String replaceAll(String body) {
+			return pattern.matcher(body).replaceAll(replacement);
+		}
+	}
+
+	private static final EmoticonPattern[] patterns = new EmoticonPattern[] {
+			new EmoticonPattern(":-?D", 0x1f600),
+			new EmoticonPattern("\\^\\^", 0x1f601),
+			new EmoticonPattern(":'D", 0x1f602),
+			new EmoticonPattern("\\]-?D", 0x1f608),
+			new EmoticonPattern(";-?\\)", 0x1f609),
+			new EmoticonPattern(":-?\\)", 0x1f60a),
+			new EmoticonPattern("[B8]-?\\)", 0x1f60e),
+			new EmoticonPattern(":-?\\|", 0x1f610),
+			new EmoticonPattern(":-?[/\\\\]", 0x1f615),
+			new EmoticonPattern(":-?\\*", 0x1f617),
+			new EmoticonPattern(":-?[Ppb]", 0x1f61b),
+			new EmoticonPattern(":-?\\(", 0x1f61e),
+			new EmoticonPattern(":-?[0Oo]", 0x1f62e),
+			new EmoticonPattern("\\\\o/", 0x1F631), };
+
+	public static String transformAsciiEmoticonsToUtf8(String body) {
+		if (body != null) {
+			for (EmoticonPattern p : patterns) {
+				body = p.replaceAll(body);
+			}
+		}
+		return body;
+	}
+
+	public static Spannable transformAsciiEmoticons(Context context, String body) {
+		Spannable spannable;
+		if (Config.UTF8_EMOTICONS) {
+			spannable = spannableFactory.newSpannable(transformAsciiEmoticonsToUtf8(body));
+		}
+		else {
+			spannable = spannableFactory.newSpannable(body);
+			getSmiledText(context, spannable);	
+		}
+		return spannable;
+	}
+
+	public static int getColorForName(String name) {
+		if (name.isEmpty()) {
+			return 0xFF202020;
+		}
+		int colors[] = {0xFFe91e63, 0xFF9c27b0, 0xFF673ab7, 0xFF3f51b5,
+			0xFF5677fc, 0xFF03a9f4, 0xFF00bcd4, 0xFF009688, 0xFFff5722,
+			0xFF795548, 0xFF607d8b};
+		return colors[(int) ((name.hashCode() & 0xffffffffl) % colors.length)];
+	}
+
+	public static Pair<String,Boolean> getMessagePreview(final Context context, final Message message) {
+		final Downloadable d = message.getDownloadable();
+		if (d != null ) {
+			switch (d.getStatus()) {
+				case Downloadable.STATUS_CHECKING:
+					return new Pair<>(context.getString(R.string.checking_image),true);
+				case Downloadable.STATUS_DOWNLOADING:
+					return new Pair<>(context.getString(R.string.receiving_x_file,
+									getFileDescriptionString(context,message),
+									d.getProgress()),true);
+				case Downloadable.STATUS_OFFER:
+				case Downloadable.STATUS_OFFER_CHECK_FILESIZE:
+					return new Pair<>(context.getString(R.string.x_file_offered_for_download,
+									getFileDescriptionString(context,message)),true);
+				case Downloadable.STATUS_DELETED:
+					return new Pair<>(context.getString(R.string.file_deleted),true);
+				case Downloadable.STATUS_FAILED:
+					return new Pair<>(context.getString(R.string.file_transmission_failed),true);
+				case Downloadable.STATUS_UPLOADING:
+					if (message.getStatus() == Message.STATUS_OFFERED) {
+						return new Pair<>(context.getString(R.string.offering_x_file,
+								getFileDescriptionString(context, message)), true);
+					} else {
+						return new Pair<>(context.getString(R.string.sending_x_file,
+								getFileDescriptionString(context, message)), true);
+					}
+				default:
+					return new Pair<>("",false);
+			}
+		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+			return new Pair<>(context.getString(R.string.encrypted_message_received),true);
+		} else if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
+			if (message.getStatus() == Message.STATUS_RECEIVED) {
+				return new Pair<>(context.getString(R.string.received_x_file,
+							getFileDescriptionString(context, message)), true);
+			} else {
+				return new Pair<>(getFileDescriptionString(context,message),true);
+			}
+		} else {
+			if (message.getBody().startsWith(Message.ME_COMMAND)) {
+				return new Pair<>(message.getBody().replaceAll("^" + Message.ME_COMMAND,
+						UIHelper.getMessageDisplayName(message) + " "), false);
+			} else if (GeoHelper.isGeoUri(message.getBody())) {
+				if (message.getStatus() == Message.STATUS_RECEIVED) {
+					return new Pair<>(context.getString(R.string.received_location),true);
+				} else {
+					return new Pair<>(context.getString(R.string.location), true);
+				}
+			} else{
+				return new Pair<>(message.getBody(), false);
+			}
+		}
+	}
+
+	public static String getFileDescriptionString(final Context context, final Message message) {
+		if (message.getType() == Message.TYPE_IMAGE) {
+			return context.getString(R.string.image);
+		}
+		final String path = message.getRelativeFilePath();
+		if (path == null) {
+			return "";
+		}
+		final String mime;
+		try {
+			mime = URLConnection.guessContentTypeFromName(path.replace("#",""));
+		} catch (final StringIndexOutOfBoundsException ignored) {
+			return context.getString(R.string.file);
+		}
+		if (mime == null) {
+			return context.getString(R.string.file);
+		} else if (mime.startsWith("audio/")) {
+			return context.getString(R.string.audio);
+		} else if(mime.startsWith("video/")) {
+			return context.getString(R.string.video);
+		} else if (mime.startsWith("image/")) {
+			return context.getString(R.string.image);
+		} else if (mime.contains("pdf")) {
+			return context.getString(R.string.pdf_document)	;
+		} else if (mime.contains("application/vnd.android.package-archive")) {
+			return context.getString(R.string.apk)	;
+		} else if (mime.contains("vcard")) {
+			return context.getString(R.string.vcard)	;
+		} else {
+			return mime;
+		}
+	}
+
+	public static String getMessageDisplayName(final Message message) {
+		if (message.getStatus() == Message.STATUS_RECEIVED) {
+			if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
+				return getDisplayedMucCounterpart(message.getCounterpart());
+			} else {
+				final Contact contact = message.getContact();
+				return contact != null ? contact.getDisplayName() : "";
+			}
+		} else {
+			if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
+				return getDisplayedMucCounterpart(message.getConversation().getJid());
+			} else {
+				final Jid jid = message.getConversation().getAccount().getJid();
+				return jid.hasLocalpart() ? jid.getLocalpart() : jid.toDomainJid().toString();
+			}
+		}
+	}
+
+	private static String getDisplayedMucCounterpart(final Jid counterpart) {
+		if (counterpart==null) {
+			return "";
+		} else if (!counterpart.isBareJid()) {
+			return counterpart.getResourcepart().trim();
+		} else {
+			return counterpart.toString().trim();
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/XmlHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/XmlHelper.java
new file mode 100644
index 00000000..1287f73f
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/XmlHelper.java
@@ -0,0 +1,12 @@
+package de.thedevstack.conversationsplus.utils;
+
+public class XmlHelper {
+	public static String encodeEntities(String content) {
+		content = content.replace("&", "&amp;");
+		content = content.replace("<", "&lt;");
+		content = content.replace(">", "&gt;");
+		content = content.replace("\"", "&quot;");
+		content = content.replace("'", "&apos;");
+		return content;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java b/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java
new file mode 100644
index 00000000..80718dec
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/Xmlns.java
@@ -0,0 +1,8 @@
+package de.thedevstack.conversationsplus.utils;
+
+public final class Xmlns {
+	public static final String BLOCKING = "urn:xmpp:blocking";
+	public static final String ROSTER = "jabber:iq:roster";
+	public static final String REGISTER = "jabber:iq:register";
+	public static final String BYTE_STREAMS = "http://jabber.org/protocol/bytestreams";
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/XmppUri.java b/src/main/java/de/thedevstack/conversationsplus/utils/XmppUri.java
new file mode 100644
index 00000000..5d3a2694
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/XmppUri.java
@@ -0,0 +1,85 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.net.Uri;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class XmppUri {
+
+	protected String jid;
+	protected boolean muc;
+	protected String fingerprint;
+
+	public XmppUri(String uri) {
+		try {
+			parse(Uri.parse(uri));
+		} catch (IllegalArgumentException e) {
+			try {
+				jid = Jid.fromString(uri).toBareJid().toString();
+			} catch (InvalidJidException e2) {
+				jid = null;
+			}
+		}
+	}
+
+	public XmppUri(Uri uri) {
+		parse(uri);
+	}
+
+	protected void parse(Uri uri) {
+		String scheme = uri.getScheme();
+		if ("xmpp".equalsIgnoreCase(scheme)) {
+			// sample: xmpp:jid@foo.com
+			muc = "join".equalsIgnoreCase(uri.getQuery());
+			if (uri.getAuthority() != null) {
+				jid = uri.getAuthority();
+			} else {
+				jid = uri.getSchemeSpecificPart().split("\\?")[0];
+			}
+			fingerprint = parseFingerprint(uri.getQuery());
+		} else if ("imto".equalsIgnoreCase(scheme)) {
+			// sample: imto://xmpp/jid@foo.com
+			try {
+				jid = URLDecoder.decode(uri.getEncodedPath(), "UTF-8").split("/")[1];
+			} catch (final UnsupportedEncodingException ignored) {
+				jid = null;
+			}
+		} else {
+			try {
+				jid = Jid.fromString(uri.toString()).toBareJid().toString();
+			} catch (final InvalidJidException ignored) {
+				jid = null;
+			}
+		}
+	}
+
+	protected  String parseFingerprint(String query) {
+		if (query == null) {
+			return null;
+		} else {
+			final String NEEDLE = "otr-fingerprint=";
+			int index = query.indexOf(NEEDLE);
+			if (index >= 0 && query.length() >= (NEEDLE.length() + index + 40)) {
+				return query.substring(index + NEEDLE.length(), index + NEEDLE.length() + 40);
+			} else {
+				return null;
+			}
+		}
+	}
+
+	public Jid getJid() {
+		try {
+			return this.jid == null ? null :Jid.fromString(this.jid.toLowerCase());
+		} catch (InvalidJidException e) {
+			return null;
+		}
+	}
+
+	public String getFingerprint() {
+		return this.fingerprint;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/Element.java b/src/main/java/de/thedevstack/conversationsplus/xml/Element.java
new file mode 100644
index 00000000..d0cb87f9
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/Element.java
@@ -0,0 +1,171 @@
+package de.thedevstack.conversationsplus.xml;
+
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.utils.XmlHelper;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class Element {
+	protected String name;
+	protected Hashtable<String, String> attributes = new Hashtable<>();
+	protected String content;
+	protected List<Element> children = new ArrayList<>();
+
+	public Element(String name) {
+		this.name = name;
+	}
+
+	public Element addChild(Element child) {
+		this.content = null;
+		children.add(child);
+		return child;
+	}
+
+	public Element addChild(String name) {
+		this.content = null;
+		Element child = new Element(name);
+		children.add(child);
+		return child;
+	}
+
+	public Element addChild(String name, String xmlns) {
+		this.content = null;
+		Element child = new Element(name);
+		child.setAttribute("xmlns", xmlns);
+		children.add(child);
+		return child;
+	}
+
+	public Element setContent(String content) {
+		this.content = content;
+		this.children.clear();
+		return this;
+	}
+
+	public Element findChild(String name) {
+		for (Element child : this.children) {
+			if (child.getName().equals(name)) {
+				return child;
+			}
+		}
+		return null;
+	}
+
+	public Element findChild(String name, String xmlns) {
+		for (Element child : this.children) {
+			if (child.getName().equals(name)
+					&& (child.getAttribute("xmlns").equals(xmlns))) {
+				return child;
+					}
+		}
+		return null;
+	}
+
+	public boolean hasChild(final String name) {
+		return findChild(name) != null;
+	}
+
+	public boolean hasChild(final String name, final String xmlns) {
+		return findChild(name, xmlns) != null;
+	}
+
+	public List<Element> getChildren() {
+		return this.children;
+	}
+
+	public Element setChildren(List<Element> children) {
+		this.children = children;
+		return this;
+	}
+
+	public String getContent() {
+		return content;
+	}
+
+	public Element setAttribute(String name, String value) {
+		if (name != null && value != null) {
+			this.attributes.put(name, value);
+		}
+		return this;
+	}
+
+	public Element setAttributes(Hashtable<String, String> attributes) {
+		this.attributes = attributes;
+		return this;
+	}
+
+	public String getAttribute(String name) {
+		if (this.attributes.containsKey(name)) {
+			return this.attributes.get(name);
+		} else {
+			return null;
+		}
+	}
+
+	public Jid getAttributeAsJid(String name) {
+		final String jid = this.getAttribute(name);
+		if (jid != null && !jid.isEmpty()) {
+			try {
+				return Jid.fromString(jid);
+			} catch (final InvalidJidException e) {
+				Log.e(Config.LOGTAG, "could not parse jid " + jid);
+				return null;
+			}
+		}
+		return null;
+	}
+
+	public Hashtable<String, String> getAttributes() {
+		return this.attributes;
+	}
+
+	public String toString() {
+		StringBuilder elementOutput = new StringBuilder();
+		if ((content == null) && (children.size() == 0)) {
+			Tag emptyTag = Tag.empty(name);
+			emptyTag.setAtttributes(this.attributes);
+			elementOutput.append(emptyTag.toString());
+		} else {
+			Tag startTag = Tag.start(name);
+			startTag.setAtttributes(this.attributes);
+			elementOutput.append(startTag);
+			if (content != null) {
+				elementOutput.append(XmlHelper.encodeEntities(content));
+			} else {
+				for (Element child : children) {
+					elementOutput.append(child.toString());
+				}
+			}
+			Tag endTag = Tag.end(name);
+			elementOutput.append(endTag);
+		}
+		return elementOutput.toString();
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void clearChildren() {
+		this.children.clear();
+	}
+
+	public void setAttribute(String name, long value) {
+		this.setAttribute(name, Long.toString(value));
+	}
+
+	public void setAttribute(String name, int value) {
+		this.setAttribute(name, Integer.toString(value));
+	}
+
+	public boolean getAttributeAsBoolean(String name) {
+		String attr = getAttribute(name);
+		return (attr != null && (attr.equalsIgnoreCase("true") || attr.equalsIgnoreCase("1")));
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/Tag.java b/src/main/java/de/thedevstack/conversationsplus/xml/Tag.java
new file mode 100644
index 00000000..84e37363
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/Tag.java
@@ -0,0 +1,104 @@
+package de.thedevstack.conversationsplus.xml;
+
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import de.thedevstack.conversationsplus.utils.XmlHelper;
+
+public class Tag {
+	public static final int NO = -1;
+	public static final int START = 0;
+	public static final int END = 1;
+	public static final int EMPTY = 2;
+
+	protected int type;
+	protected String name;
+	protected Hashtable<String, String> attributes = new Hashtable<String, String>();
+
+	protected Tag(int type, String name) {
+		this.type = type;
+		this.name = name;
+	}
+
+	public static Tag no(String text) {
+		return new Tag(NO, text);
+	}
+
+	public static Tag start(String name) {
+		return new Tag(START, name);
+	}
+
+	public static Tag end(String name) {
+		return new Tag(END, name);
+	}
+
+	public static Tag empty(String name) {
+		return new Tag(EMPTY, name);
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getAttribute(String attrName) {
+		return this.attributes.get(attrName);
+	}
+
+	public Tag setAttribute(String attrName, String attrValue) {
+		this.attributes.put(attrName, attrValue);
+		return this;
+	}
+
+	public Tag setAtttributes(Hashtable<String, String> attributes) {
+		this.attributes = attributes;
+		return this;
+	}
+
+	public boolean isStart(String needle) {
+		if (needle == null)
+			return false;
+		return (this.type == START) && (needle.equals(this.name));
+	}
+
+	public boolean isEnd(String needle) {
+		if (needle == null)
+			return false;
+		return (this.type == END) && (needle.equals(this.name));
+	}
+
+	public boolean isNo() {
+		return (this.type == NO);
+	}
+
+	public String toString() {
+		StringBuilder tagOutput = new StringBuilder();
+		tagOutput.append('<');
+		if (type == END) {
+			tagOutput.append('/');
+		}
+		tagOutput.append(name);
+		if (type != END) {
+			Set<Entry<String, String>> attributeSet = attributes.entrySet();
+			Iterator<Entry<String, String>> it = attributeSet.iterator();
+			while (it.hasNext()) {
+				Entry<String, String> entry = it.next();
+				tagOutput.append(' ');
+				tagOutput.append(entry.getKey());
+				tagOutput.append("=\"");
+				tagOutput.append(XmlHelper.encodeEntities(entry.getValue()));
+				tagOutput.append('"');
+			}
+		}
+		if (type == EMPTY) {
+			tagOutput.append('/');
+		}
+		tagOutput.append('>');
+		return tagOutput.toString();
+	}
+
+	public Hashtable<String, String> getAttributes() {
+		return this.attributes;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/TagWriter.java b/src/main/java/de/thedevstack/conversationsplus/xml/TagWriter.java
new file mode 100644
index 00000000..c0f028af
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/TagWriter.java
@@ -0,0 +1,114 @@
+package de.thedevstack.conversationsplus.xml;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class TagWriter {
+
+	private OutputStream plainOutputStream;
+	private OutputStreamWriter outputStream;
+	private boolean finshed = false;
+	private LinkedBlockingQueue<AbstractStanza> writeQueue = new LinkedBlockingQueue<AbstractStanza>();
+	private Thread asyncStanzaWriter = new Thread() {
+		private boolean shouldStop = false;
+
+		@Override
+		public void run() {
+			while (!shouldStop) {
+				if ((finshed) && (writeQueue.size() == 0)) {
+					return;
+				}
+				try {
+					AbstractStanza output = writeQueue.take();
+					if (outputStream == null) {
+						shouldStop = true;
+					} else {
+						outputStream.write(output.toString());
+						outputStream.flush();
+					}
+				} catch (IOException e) {
+					shouldStop = true;
+				} catch (InterruptedException e) {
+					shouldStop = true;
+				}
+			}
+		}
+	};
+
+	public TagWriter() {
+	}
+
+	public void setOutputStream(OutputStream out) throws IOException {
+		if (out == null) {
+			throw new IOException();
+		}
+		this.plainOutputStream = out;
+		this.outputStream = new OutputStreamWriter(out);
+	}
+
+	public OutputStream getOutputStream() throws IOException {
+		if (this.plainOutputStream == null) {
+			throw new IOException();
+		}
+		return this.plainOutputStream;
+	}
+
+	public TagWriter beginDocument() throws IOException {
+		if (outputStream == null) {
+			throw new IOException("output stream was null");
+		}
+		outputStream.write("<?xml version='1.0'?>");
+		outputStream.flush();
+		return this;
+	}
+
+	public TagWriter writeTag(Tag tag) throws IOException {
+		if (outputStream == null) {
+			throw new IOException("output stream was null");
+		}
+		outputStream.write(tag.toString());
+		outputStream.flush();
+		return this;
+	}
+
+	public TagWriter writeElement(Element element) throws IOException {
+		if (outputStream == null) {
+			throw new IOException("output stream was null");
+		}
+		outputStream.write(element.toString());
+		outputStream.flush();
+		return this;
+	}
+
+	public TagWriter writeStanzaAsync(AbstractStanza stanza) {
+		if (finshed) {
+			return this;
+		} else {
+			if (!asyncStanzaWriter.isAlive()) {
+				try {
+					asyncStanzaWriter.start();
+				} catch (IllegalThreadStateException e) {
+					// already started
+				}
+			}
+			writeQueue.add(stanza);
+			return this;
+		}
+	}
+
+	public void finish() {
+		this.finshed = true;
+	}
+
+	public boolean finished() {
+		return (this.writeQueue.size() == 0);
+	}
+
+	public boolean isActive() {
+		return outputStream != null;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java b/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java
new file mode 100644
index 00000000..d7f6edf5
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xml/XmlReader.java
@@ -0,0 +1,141 @@
+package de.thedevstack.conversationsplus.xml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import de.thedevstack.conversationsplus.Config;
+
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.util.Log;
+import android.util.Xml;
+
+public class XmlReader {
+	private XmlPullParser parser;
+	private PowerManager.WakeLock wakeLock;
+	private InputStream is;
+
+	public XmlReader(WakeLock wakeLock) {
+		this.parser = Xml.newPullParser();
+		try {
+			this.parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,
+					true);
+		} catch (XmlPullParserException e) {
+			Log.d(Config.LOGTAG, "error setting namespace feature on parser");
+		}
+		this.wakeLock = wakeLock;
+	}
+
+	public void setInputStream(InputStream inputStream) throws IOException {
+		if (inputStream == null) {
+			throw new IOException();
+		}
+		this.is = inputStream;
+		try {
+			parser.setInput(new InputStreamReader(this.is));
+		} catch (XmlPullParserException e) {
+			throw new IOException("error resetting parser");
+		}
+	}
+
+	public InputStream getInputStream() throws IOException {
+		if (this.is == null) {
+			throw new IOException();
+		}
+		return is;
+	}
+
+	public void reset() throws IOException {
+		if (this.is == null) {
+			throw new IOException();
+		}
+		try {
+			parser.setInput(new InputStreamReader(this.is));
+		} catch (XmlPullParserException e) {
+			throw new IOException("error resetting parser");
+		}
+	}
+
+	public Tag readTag() throws XmlPullParserException, IOException {
+		if (wakeLock.isHeld()) {
+			try {
+				wakeLock.release();
+			} catch (RuntimeException re) {
+			}
+		}
+		try {
+			while (this.is != null
+					&& parser.next() != XmlPullParser.END_DOCUMENT) {
+				wakeLock.acquire();
+				if (parser.getEventType() == XmlPullParser.START_TAG) {
+					Tag tag = Tag.start(parser.getName());
+					for (int i = 0; i < parser.getAttributeCount(); ++i) {
+						tag.setAttribute(parser.getAttributeName(i),
+								parser.getAttributeValue(i));
+					}
+					String xmlns = parser.getNamespace();
+					if (xmlns != null) {
+						tag.setAttribute("xmlns", xmlns);
+					}
+					return tag;
+				} else if (parser.getEventType() == XmlPullParser.END_TAG) {
+					Tag tag = Tag.end(parser.getName());
+					return tag;
+				} else if (parser.getEventType() == XmlPullParser.TEXT) {
+					Tag tag = Tag.no(parser.getText());
+					return tag;
+				}
+			}
+			if (wakeLock.isHeld()) {
+				try {
+					wakeLock.release();
+				} catch (RuntimeException re) {
+				}
+			}
+		} catch (ArrayIndexOutOfBoundsException e) {
+			throw new IOException(
+					"xml parser mishandled ArrayIndexOufOfBounds", e);
+		} catch (StringIndexOutOfBoundsException e) {
+			throw new IOException(
+					"xml parser mishandled StringIndexOufOfBounds", e);
+		} catch (NullPointerException e) {
+			throw new IOException("xml parser mishandled NullPointerException",
+					e);
+		} catch (IndexOutOfBoundsException e) {
+			throw new IOException("xml parser mishandled IndexOutOfBound", e);
+		}
+		return null;
+	}
+
+	public Element readElement(Tag currentTag) throws XmlPullParserException,
+			IOException {
+		Element element = new Element(currentTag.getName());
+		element.setAttributes(currentTag.getAttributes());
+		Tag nextTag = this.readTag();
+		if (nextTag == null) {
+			throw new IOException("unterupted mid tag");
+		}
+		if (nextTag.isNo()) {
+			element.setContent(nextTag.getName());
+			nextTag = this.readTag();
+			if (nextTag == null) {
+				throw new IOException("unterupted mid tag");
+			}
+		}
+		while (!nextTag.isEnd(element.getName())) {
+			if (!nextTag.isNo()) {
+				Element child = this.readElement(nextTag);
+				element.addChild(child);
+			}
+			nextTag = this.readTag();
+			if (nextTag == null) {
+				throw new IOException("unterupted mid tag");
+			}
+		}
+		return element;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnAdvancedStreamFeaturesLoaded.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnAdvancedStreamFeaturesLoaded.java
new file mode 100644
index 00000000..0692232c
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnAdvancedStreamFeaturesLoaded.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+
+public interface OnAdvancedStreamFeaturesLoaded {
+	public void onAdvancedStreamFeaturesAvailable(final Account account);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnBindListener.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnBindListener.java
new file mode 100644
index 00000000..274511e0
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnBindListener.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+
+public interface OnBindListener {
+	public void onBind(Account account);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnContactStatusChanged.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnContactStatusChanged.java
new file mode 100644
index 00000000..009b33df
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnContactStatusChanged.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Contact;
+
+public interface OnContactStatusChanged {
+	public void onContactStatusChanged(final Contact contact, final boolean online);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnIqPacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnIqPacketReceived.java
new file mode 100644
index 00000000..df0178c6
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnIqPacketReceived.java
@@ -0,0 +1,8 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public interface OnIqPacketReceived extends PacketReceived {
+	public void onIqPacketReceived(Account account, IqPacket packet);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessageAcknowledged.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessageAcknowledged.java
new file mode 100644
index 00000000..7cfa557d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessageAcknowledged.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+
+public interface OnMessageAcknowledged {
+	public void onMessageAcknowledged(Account account, String id);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessagePacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessagePacketReceived.java
new file mode 100644
index 00000000..47649a18
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnMessagePacketReceived.java
@@ -0,0 +1,8 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+
+public interface OnMessagePacketReceived extends PacketReceived {
+	public void onMessagePacketReceived(Account account, MessagePacket packet);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnPresencePacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnPresencePacketReceived.java
new file mode 100644
index 00000000..70b0ccd2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnPresencePacketReceived.java
@@ -0,0 +1,8 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+
+public interface OnPresencePacketReceived extends PacketReceived {
+	public void onPresencePacketReceived(Account account, PresencePacket packet);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnStatusChanged.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnStatusChanged.java
new file mode 100644
index 00000000..c8478bbb
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnStatusChanged.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import de.thedevstack.conversationsplus.entities.Account;
+
+public interface OnStatusChanged {
+	public void onStatusChanged(Account account);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/OnUpdateBlocklist.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnUpdateBlocklist.java
new file mode 100644
index 00000000..ea7b8c62
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/OnUpdateBlocklist.java
@@ -0,0 +1,13 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+public interface OnUpdateBlocklist {
+	// Use an enum instead of a boolean to make sure we don't run into the boolean trap
+	// (`onUpdateBlocklist(true)' doesn't read well, and could be confusing).
+	public static enum Status {
+		BLOCKED,
+		UNBLOCKED
+	}
+
+	@SuppressWarnings("MethodNameSameAsClassName")
+	public void OnUpdateBlocklist(final Status status);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/PacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/PacketReceived.java
new file mode 100644
index 00000000..6274aaa2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/PacketReceived.java
@@ -0,0 +1,5 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+public abstract interface PacketReceived {
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java
new file mode 100644
index 00000000..039d8375
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/XmppConnection.java
@@ -0,0 +1,1125 @@
+package de.thedevstack.conversationsplus.xmpp;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.os.SystemClock;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import android.util.Pair;
+import android.util.SparseArray;
+
+import org.apache.http.conn.ssl.StrictHostnameVerifier;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.xmlpull.v1.XmlPullParserException;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.math.BigInteger;
+import java.net.ConnectException;
+import java.net.IDN;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.X509TrustManager;
+
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.crypto.sasl.DigestMd5;
+import de.thedevstack.conversationsplus.crypto.sasl.Plain;
+import de.thedevstack.conversationsplus.crypto.sasl.SaslMechanism;
+import de.thedevstack.conversationsplus.crypto.sasl.ScramSha1;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.generator.IqGenerator;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.utils.DNSHelper;
+import de.thedevstack.conversationsplus.utils.Xmlns;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xml.Tag;
+import de.thedevstack.conversationsplus.xml.TagWriter;
+import de.thedevstack.conversationsplus.xml.XmlReader;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.jingle.OnJinglePacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.MessagePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.PresencePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.csi.ActivePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.csi.InactivePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt.AckPacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt.EnablePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt.RequestPacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt.ResumePacket;
+
+public class XmppConnection implements Runnable {
+
+	private static final int PACKET_IQ = 0;
+	private static final int PACKET_MESSAGE = 1;
+	private static final int PACKET_PRESENCE = 2;
+	private final Context applicationContext;
+	protected Account account;
+	private final WakeLock wakeLock;
+	private Socket socket;
+	private XmlReader tagReader;
+	private TagWriter tagWriter;
+	private final Features features = new Features(this);
+	private boolean shouldBind = true;
+	private boolean shouldAuthenticate = true;
+	private Element streamFeatures;
+	private final HashMap<String, List<String>> disco = new HashMap<>();
+
+	private String streamId = null;
+	private int smVersion = 3;
+	private final SparseArray<String> messageReceipts = new SparseArray<>();
+
+	private int stanzasReceived = 0;
+	private int stanzasSent = 0;
+	private long lastPacketReceived = 0;
+	private long lastPingSent = 0;
+	private long lastConnect = 0;
+	private long lastSessionStarted = 0;
+	private int attempt = 0;
+	private final Map<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
+	private OnPresencePacketReceived presenceListener = null;
+	private OnJinglePacketReceived jingleListener = null;
+	private OnIqPacketReceived unregisteredIqListener = null;
+	private OnMessagePacketReceived messageListener = null;
+	private OnStatusChanged statusListener = null;
+	private OnBindListener bindListener = null;
+	private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
+	private OnMessageAcknowledged acknowledgedListener = null;
+	private XmppConnectionService mXmppConnectionService = null;
+
+	private SaslMechanism saslMechanism;
+
+	public XmppConnection(final Account account, final XmppConnectionService service) {
+		this.account = account;
+		this.wakeLock = service.getPowerManager().newWakeLock(
+				PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
+		tagWriter = new TagWriter();
+		mXmppConnectionService = service;
+		applicationContext = service.getApplicationContext();
+	}
+
+	protected void changeStatus(final Account.State nextStatus) {
+		if (account.getStatus() != nextStatus) {
+			if ((nextStatus == Account.State.OFFLINE)
+					&& (account.getStatus() != Account.State.CONNECTING)
+					&& (account.getStatus() != Account.State.ONLINE)
+					&& (account.getStatus() != Account.State.DISABLED)) {
+				return;
+					}
+			if (nextStatus == Account.State.ONLINE) {
+				this.attempt = 0;
+			}
+			account.setStatus(nextStatus);
+			if (statusListener != null) {
+				statusListener.onStatusChanged(account);
+			}
+		}
+	}
+
+	protected void connect() {
+		Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
+		features.encryptionEnabled = false;
+		lastConnect = SystemClock.elapsedRealtime();
+		lastPingSent = SystemClock.elapsedRealtime();
+		this.attempt++;
+		try {
+			shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER);
+			tagReader = new XmlReader(wakeLock);
+			tagWriter = new TagWriter();
+			packetCallbacks.clear();
+			this.changeStatus(Account.State.CONNECTING);
+			final Bundle result = DNSHelper.getSRVRecord(account.getServer());
+			final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
+			if ("timeout".equals(result.getString("error"))) {
+				throw new IOException("timeout in dns");
+			} else if (values != null) {
+				int i = 0;
+				boolean socketError = true;
+				while (socketError && values.size() > i) {
+					final Bundle namePort = (Bundle) values.get(i);
+					try {
+						String srvRecordServer;
+						try {
+							srvRecordServer=IDN.toASCII(namePort.getString("name"));
+						} catch (final IllegalArgumentException e) {
+							// TODO: Handle me?`
+							srvRecordServer = "";
+						}
+						final int srvRecordPort = namePort.getInt("port");
+						final String srvIpServer = namePort.getString("ip");
+						final InetSocketAddress addr;
+						if (srvIpServer != null) {
+							addr = new InetSocketAddress(srvIpServer, srvRecordPort);
+							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+									+ ": using values from dns " + srvRecordServer
+									+ "[" + srvIpServer + "]:" + srvRecordPort);
+						} else {
+							addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
+							Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+									+ ": using values from dns "
+									+ srvRecordServer + ":" + srvRecordPort);
+						}
+						socket = new Socket();
+						socket.connect(addr, 20000);
+						socketError = false;
+					} catch (final UnknownHostException e) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
+						i++;
+					} catch (final IOException e) {
+						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
+						i++;
+					}
+				}
+				if (socketError) {
+					throw new UnknownHostException();
+				}
+			} else if (result.containsKey("error")
+					&& "nosrv".equals(result.getString("error", null))) {
+				socket = new Socket(account.getServer().getDomainpart(), 5222);
+			} else {
+				throw new IOException("timeout in dns");
+			}
+			final OutputStream out = socket.getOutputStream();
+			tagWriter.setOutputStream(out);
+			final InputStream in = socket.getInputStream();
+			tagReader.setInputStream(in);
+			tagWriter.beginDocument();
+			sendStartStream();
+			Tag nextTag;
+			while ((nextTag = tagReader.readTag()) != null) {
+				if (nextTag.isStart("stream")) {
+					processStream(nextTag);
+					break;
+				} else {
+					throw new IOException("unknown tag on connect");
+				}
+			}
+			if (socket.isConnected()) {
+				socket.close();
+			}
+		} catch (final UnknownHostException | ConnectException e) {
+			this.changeStatus(Account.State.SERVER_NOT_FOUND);
+		} catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
+			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
+			this.changeStatus(Account.State.OFFLINE);
+			this.attempt--; //don't count attempt when reconnecting instantly anyway
+		} finally {
+			if (wakeLock.isHeld()) {
+				try {
+					wakeLock.release();
+				} catch (final RuntimeException ignored) {
+				}
+			}
+		}
+	}
+
+	@Override
+	public void run() {
+		try {
+			if (socket != null) {
+				socket.close();
+			}
+		} catch (final IOException ignored) {
+
+		}
+		connect();
+	}
+
+	private void processStream(final Tag currentTag) throws XmlPullParserException,
+					IOException, NoSuchAlgorithmException {
+						Tag nextTag = tagReader.readTag();
+
+						while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
+							if (nextTag.isStart("error")) {
+								processStreamError(nextTag);
+							} else if (nextTag.isStart("features")) {
+								processStreamFeatures(nextTag);
+							} else if (nextTag.isStart("proceed")) {
+								switchOverToTls(nextTag);
+							} else if (nextTag.isStart("success")) {
+								final String challenge = tagReader.readElement(nextTag).getContent();
+								try {
+									saslMechanism.getResponse(challenge);
+								} catch (final SaslMechanism.AuthenticationException e) {
+									disconnect(true);
+									Log.e(Config.LOGTAG, String.valueOf(e));
+								}
+								Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
+								account.setKey(Account.PINNED_MECHANISM_KEY,
+										String.valueOf(saslMechanism.getPriority()));
+								tagReader.reset();
+								sendStartStream();
+								processStream(tagReader.readTag());
+								break;
+							} else if (nextTag.isStart("failure")) {
+								tagReader.readElement(nextTag);
+								changeStatus(Account.State.UNAUTHORIZED);
+							} else if (nextTag.isStart("challenge")) {
+								final String challenge = tagReader.readElement(nextTag).getContent();
+								final Element response = new Element("response");
+								response.setAttribute("xmlns",
+										"urn:ietf:params:xml:ns:xmpp-sasl");
+								try {
+									response.setContent(saslMechanism.getResponse(challenge));
+								} catch (final SaslMechanism.AuthenticationException e) {
+									// TODO: Send auth abort tag.
+									Log.e(Config.LOGTAG, e.toString());
+								}
+								tagWriter.writeElement(response);
+							} else if (nextTag.isStart("enabled")) {
+								final Element enabled = tagReader.readElement(nextTag);
+								if ("true".equals(enabled.getAttribute("resume"))) {
+									this.streamId = enabled.getAttribute("id");
+									Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+											+ ": stream managment(" + smVersion
+											+ ") enabled (resumable)");
+								} else {
+									Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+											+ ": stream managment(" + smVersion + ") enabled");
+								}
+								this.lastSessionStarted = SystemClock.elapsedRealtime();
+								this.stanzasReceived = 0;
+								final RequestPacket r = new RequestPacket(smVersion);
+								tagWriter.writeStanzaAsync(r);
+							} else if (nextTag.isStart("resumed")) {
+								lastPacketReceived = SystemClock.elapsedRealtime();
+								final Element resumed = tagReader.readElement(nextTag);
+								final String h = resumed.getAttribute("h");
+								try {
+									final int serverCount = Integer.parseInt(h);
+									if (serverCount != stanzasSent) {
+										Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+												+ ": session resumed with lost packages");
+										stanzasSent = serverCount;
+									} else {
+										Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+												+ ": session resumed");
+									}
+									if (acknowledgedListener != null) {
+										for (int i = 0; i < messageReceipts.size(); ++i) {
+											if (serverCount >= messageReceipts.keyAt(i)) {
+												acknowledgedListener.onMessageAcknowledged(
+														account, messageReceipts.valueAt(i));
+											}
+										}
+									}
+									messageReceipts.clear();
+								} catch (final NumberFormatException ignored) {
+								}
+								sendServiceDiscoveryInfo(account.getServer());
+								sendServiceDiscoveryItems(account.getServer());
+								sendInitialPing();
+							} else if (nextTag.isStart("r")) {
+								tagReader.readElement(nextTag);
+								final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
+								tagWriter.writeStanzaAsync(ack);
+							} else if (nextTag.isStart("a")) {
+								final Element ack = tagReader.readElement(nextTag);
+								lastPacketReceived = SystemClock.elapsedRealtime();
+								final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
+								final String msgId = this.messageReceipts.get(serverSequence);
+								if (msgId != null) {
+									if (this.acknowledgedListener != null) {
+										this.acknowledgedListener.onMessageAcknowledged(
+												account, msgId);
+									}
+									this.messageReceipts.remove(serverSequence);
+								}
+							} else if (nextTag.isStart("failed")) {
+								tagReader.readElement(nextTag);
+								Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
+								streamId = null;
+								if (account.getStatus() != Account.State.ONLINE) {
+									sendBindRequest();
+								}
+							} else if (nextTag.isStart("iq")) {
+								processIq(nextTag);
+							} else if (nextTag.isStart("message")) {
+								processMessage(nextTag);
+							} else if (nextTag.isStart("presence")) {
+								processPresence(nextTag);
+							}
+							nextTag = tagReader.readTag();
+						}
+						if (account.getStatus() == Account.State.ONLINE) {
+							account. setStatus(Account.State.OFFLINE);
+							if (statusListener != null) {
+								statusListener.onStatusChanged(account);
+							}
+						}
+	}
+
+	private void sendInitialPing() {
+		Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+		iq.setFrom(account.getJid());
+		iq.addChild("ping", "urn:xmpp:ping");
+		this.sendIqPacket(iq, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+						+ ": online with resource " + account.getResource());
+				changeStatus(Account.State.ONLINE);
+			}
+		});
+	}
+
+	private Element processPacket(final Tag currentTag, final int packetType)
+		throws XmlPullParserException, IOException {
+		Element element;
+		switch (packetType) {
+			case PACKET_IQ:
+				element = new IqPacket();
+				break;
+			case PACKET_MESSAGE:
+				element = new MessagePacket();
+				break;
+			case PACKET_PRESENCE:
+				element = new PresencePacket();
+				break;
+			default:
+				return null;
+		}
+		element.setAttributes(currentTag.getAttributes());
+		Tag nextTag = tagReader.readTag();
+		if (nextTag == null) {
+			throw new IOException("interrupted mid tag");
+		}
+		while (!nextTag.isEnd(element.getName())) {
+			if (!nextTag.isNo()) {
+				final Element child = tagReader.readElement(nextTag);
+				final String type = currentTag.getAttribute("type");
+				if (packetType == PACKET_IQ
+						&& "jingle".equals(child.getName())
+						&& ("set".equalsIgnoreCase(type) || "get"
+							.equalsIgnoreCase(type))) {
+					element = new JinglePacket();
+					element.setAttributes(currentTag.getAttributes());
+							}
+				element.addChild(child);
+			}
+			nextTag = tagReader.readTag();
+			if (nextTag == null) {
+				throw new IOException("interrupted mid tag");
+			}
+		}
+		++stanzasReceived;
+		lastPacketReceived = SystemClock.elapsedRealtime();
+		return element;
+	}
+
+	private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
+		final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
+
+		if (packet.getId() == null) {
+			return; // an iq packet without id is definitely invalid
+		}
+
+		if (packet instanceof JinglePacket) {
+			if (this.jingleListener != null) {
+				this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
+			}
+		} else {
+			if (packetCallbacks.containsKey(packet.getId())) {
+				final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
+				// Packets to the server should have responses from the server
+				if (packetCallbackDuple.first.toServer(account)) {
+					if (packet.fromServer(account)) {
+						packetCallbackDuple.second.onIqPacketReceived(account, packet);
+						packetCallbacks.remove(packet.getId());
+					} else {
+						Log.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
+					}
+				} else {
+					if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
+						packetCallbackDuple.second.onIqPacketReceived(account, packet);
+						packetCallbacks.remove(packet.getId());
+					} else {
+						Log.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
+					}
+				}
+			} else if (packet.getType() == IqPacket.TYPE.GET|| packet.getType() == IqPacket.TYPE.SET) {
+				this.unregisteredIqListener.onIqPacketReceived(account, packet);
+			}
+		}
+	}
+
+	private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
+		final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
+		this.messageListener.onMessagePacketReceived(account, packet);
+	}
+
+	private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
+		PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
+		this.presenceListener.onPresencePacketReceived(account, packet);
+	}
+
+	private void sendStartTLS() throws IOException {
+		final Tag startTLS = Tag.empty("starttls");
+		startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
+		tagWriter.writeTag(startTLS);
+	}
+
+	private SharedPreferences getPreferences() {
+		return PreferenceManager.getDefaultSharedPreferences(applicationContext);
+	}
+
+	private boolean enableLegacySSL() {
+		return getPreferences().getBoolean("enable_legacy_ssl", false);
+	}
+
+	private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
+		tagReader.readTag();
+		try {
+			final SSLContext sc = SSLContext.getInstance("TLS");
+			sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
+			final SSLSocketFactory factory = sc.getSocketFactory();
+			final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
+			final InetAddress address = socket == null ? null : socket.getInetAddress();
+
+			if (factory == null || address == null || verifier == null) {
+				throw new IOException("could not setup ssl");
+			}
+
+			final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
+
+			if (sslSocket == null) {
+				throw new IOException("could not initialize ssl socket");
+			}
+
+			final String[] supportProtocols;
+			final Collection<String> supportedProtocols = new LinkedList<>(
+					Arrays.asList(sslSocket.getSupportedProtocols()));
+			supportedProtocols.remove("SSLv3");
+			supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
+
+			sslSocket.setEnabledProtocols(supportProtocols);
+
+			final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+					sslSocket.getSupportedCipherSuites());
+			//Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
+			if (cipherSuites.length > 0) {
+				sslSocket.setEnabledCipherSuites(cipherSuites);
+			}
+
+			if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
+				disconnect(true);
+				changeStatus(Account.State.SECURITY_ERROR);
+			}
+			tagReader.setInputStream(sslSocket.getInputStream());
+			tagWriter.setOutputStream(sslSocket.getOutputStream());
+			sendStartStream();
+			Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
+			features.encryptionEnabled = true;
+			processStream(tagReader.readTag());
+			sslSocket.close();
+		} catch (final NoSuchAlgorithmException | KeyManagementException e1) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
+			disconnect(true);
+			changeStatus(Account.State.SECURITY_ERROR);
+		}
+	}
+
+	private void processStreamFeatures(final Tag currentTag)
+		throws XmlPullParserException, IOException {
+		this.streamFeatures = tagReader.readElement(currentTag);
+		if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
+			sendStartTLS();
+		} else if (this.streamFeatures.hasChild("register")
+				&& account.isOptionSet(Account.OPTION_REGISTER)
+				&& features.encryptionEnabled) {
+			sendRegistryRequest();
+		} else if (!this.streamFeatures.hasChild("register")
+				&& account.isOptionSet(Account.OPTION_REGISTER)) {
+			changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
+			disconnect(true);
+		} else if (this.streamFeatures.hasChild("mechanisms")
+				&& shouldAuthenticate && features.encryptionEnabled) {
+			final List<String> mechanisms = extractMechanisms(streamFeatures
+					.findChild("mechanisms"));
+			final Element auth = new Element("auth");
+			auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
+			if (mechanisms.contains("SCRAM-SHA-1")) {
+				saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
+			} else if (mechanisms.contains("PLAIN")) {
+				saslMechanism = new Plain(tagWriter, account);
+			} else if (mechanisms.contains("DIGEST-MD5")) {
+				saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
+			}
+			final JSONObject keys = account.getKeys();
+			try {
+				if (keys.has(Account.PINNED_MECHANISM_KEY) &&
+						keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
+					Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
+							" has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
+							") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
+							"). Possible downgrade attack?");
+					disconnect(true);
+					changeStatus(Account.State.SECURITY_ERROR);
+						}
+			} catch (final JSONException e) {
+				Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
+			}
+			Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
+			auth.setAttribute("mechanism", saslMechanism.getMechanism());
+			if (!saslMechanism.getClientFirstMessage().isEmpty()) {
+				auth.setContent(saslMechanism.getClientFirstMessage());
+			}
+			tagWriter.writeElement(auth);
+		} else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
+					+ smVersion)
+				&& streamId != null) {
+			final ResumePacket resume = new ResumePacket(this.streamId,
+					stanzasReceived, smVersion);
+			this.tagWriter.writeStanzaAsync(resume);
+		} else if (this.streamFeatures.hasChild("bind") && shouldBind) {
+			sendBindRequest();
+		} else {
+			disconnect(true);
+			changeStatus(Account.State.INCOMPATIBLE_SERVER);
+		}
+	}
+
+	private List<String> extractMechanisms(final Element stream) {
+		final ArrayList<String> mechanisms = new ArrayList<>(stream
+				.getChildren().size());
+		for (final Element child : stream.getChildren()) {
+			mechanisms.add(child.getContent());
+		}
+		return mechanisms;
+	}
+
+	private void sendRegistryRequest() {
+		final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
+		register.query("jabber:iq:register");
+		register.setTo(account.getServer());
+		sendIqPacket(register, new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				final Element instructions = packet.query().findChild("instructions");
+				if (packet.query().hasChild("username")
+						&& (packet.query().hasChild("password"))) {
+					final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
+					final Element username = new Element("username")
+						.setContent(account.getUsername());
+					final Element password = new Element("password")
+						.setContent(account.getPassword());
+					register.query("jabber:iq:register").addChild(username);
+					register.query().addChild(password);
+					sendIqPacket(register, new OnIqPacketReceived() {
+
+						@Override
+						public void onIqPacketReceived(final Account account, final IqPacket packet) {
+							if (packet.getType() == IqPacket.TYPE.RESULT) {
+								account.setOption(Account.OPTION_REGISTER,
+										false);
+								changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
+							} else if (packet.hasChild("error")
+									&& (packet.findChild("error")
+										.hasChild("conflict"))) {
+								changeStatus(Account.State.REGISTRATION_CONFLICT);
+							} else {
+								changeStatus(Account.State.REGISTRATION_FAILED);
+								Log.d(Config.LOGTAG, packet.toString());
+							}
+							disconnect(true);
+						}
+					});
+				} else {
+					changeStatus(Account.State.REGISTRATION_FAILED);
+					disconnect(true);
+					Log.d(Config.LOGTAG, account.getJid().toBareJid()
+							+ ": could not register. instructions are"
+							+ instructions.getContent());
+				}
+			}
+		});
+	}
+
+	private void sendBindRequest() {
+		while(!mXmppConnectionService.areMessagesInitialized()) {
+			try {
+				Thread.sleep(500);
+			} catch (final InterruptedException ignored) {
+			}
+		}
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+		iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
+			.addChild("resource").setContent(account.getResource());
+		this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				final Element bind = packet.findChild("bind");
+				if (bind != null) {
+					final Element jid = bind.findChild("jid");
+					if (jid != null && jid.getContent() != null) {
+						try {
+							account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
+						} catch (final InvalidJidException e) {
+							// TODO: Handle the case where an external JID is technically invalid?
+						}
+						if (streamFeatures.hasChild("session")) {
+							sendStartSession();
+						} else {
+							sendPostBindInitialization();
+						}
+					} else {
+						disconnect(true);
+					}
+				} else {
+					disconnect(true);
+				}
+			}
+		});
+	}
+
+	private void sendStartSession() {
+		final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
+		startSession.addChild("session","urn:ietf:params:xml:ns:xmpp-session");
+		this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
+			@Override
+			public void onIqPacketReceived(Account account, IqPacket packet) {
+				if (packet.getType() == IqPacket.TYPE.RESULT) {
+					sendPostBindInitialization();
+				} else {
+					disconnect(true);
+				}
+			}
+		});
+	}
+
+	private void sendPostBindInitialization() {
+		smVersion = 0;
+		if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
+			smVersion = 3;
+		} else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
+			smVersion = 2;
+		}
+		if (smVersion != 0) {
+			final EnablePacket enable = new EnablePacket(smVersion);
+			tagWriter.writeStanzaAsync(enable);
+			stanzasSent = 0;
+			messageReceipts.clear();
+		}
+		features.carbonsEnabled = false;
+		features.blockListRequested = false;
+		disco.clear();
+		sendServiceDiscoveryInfo(account.getServer());
+		sendServiceDiscoveryItems(account.getServer());
+		if (bindListener != null) {
+			bindListener.onBind(account);
+		}
+		sendInitialPing();
+	}
+
+	private void sendServiceDiscoveryInfo(final Jid server) {
+		if (disco.containsKey(server.toDomainJid().toString())) {
+			if (account.getServer().equals(server.toDomainJid())) {
+				enableAdvancedStreamFeatures();
+			}
+		} else {
+			final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+			iq.setTo(server.toDomainJid());
+			iq.query("http://jabber.org/protocol/disco#info");
+			this.sendIqPacket(iq, new OnIqPacketReceived() {
+
+				@Override
+				public void onIqPacketReceived(final Account account, final IqPacket packet) {
+					final List<Element> elements = packet.query().getChildren();
+					final List<String> features = new ArrayList<>();
+					for (final Element element : elements) {
+						if (element.getName().equals("identity")) {
+							if ("irc".equals(element.getAttribute("type"))) {
+								//add fake feature to not confuse irc and real muc
+								features.add("siacs:no:muc");
+							}
+						} else if (element.getName().equals("feature")) {
+							features.add(element.getAttribute("var"));
+						}
+					}
+					disco.put(server.toDomainJid().toString(), features);
+
+					if (account.getServer().equals(server.toDomainJid())) {
+						enableAdvancedStreamFeatures();
+						for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
+							listener.onAdvancedStreamFeaturesAvailable(account);
+						}
+					}
+				}
+			});
+		}
+	}
+
+	private void enableAdvancedStreamFeatures() {
+		if (getFeatures().carbons() && !features.carbonsEnabled) {
+			sendEnableCarbons();
+		}
+		if (getFeatures().blocking() && !features.blockListRequested) {
+			Log.d(Config.LOGTAG, "Requesting block list");
+			this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
+		}
+	}
+
+	private void sendServiceDiscoveryItems(final Jid server) {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+		iq.setTo(server.toDomainJid());
+		iq.query("http://jabber.org/protocol/disco#items");
+		this.sendIqPacket(iq, new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				final List<Element> elements = packet.query().getChildren();
+				for (final Element element : elements) {
+					if (element.getName().equals("item")) {
+						final Jid jid = element.getAttributeAsJid("jid");
+						if (jid != null && !jid.equals(account.getServer())) {
+							sendServiceDiscoveryInfo(jid);
+						}
+					}
+				}
+			}
+		});
+	}
+
+	private void sendEnableCarbons() {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+		iq.addChild("enable", "urn:xmpp:carbons:2");
+		this.sendIqPacket(iq, new OnIqPacketReceived() {
+
+			@Override
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
+				if (!packet.hasChild("error")) {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid()
+							+ ": successfully enabled carbons");
+					features.carbonsEnabled = true;
+				} else {
+					Log.d(Config.LOGTAG, account.getJid().toBareJid()
+							+ ": error enableing carbons " + packet.toString());
+				}
+			}
+		});
+	}
+
+	private void processStreamError(final Tag currentTag)
+		throws XmlPullParserException, IOException {
+		final Element streamError = tagReader.readElement(currentTag);
+		if (streamError != null && streamError.hasChild("conflict")) {
+			final String resource = account.getResource().split("\\.")[0];
+			account.setResource(resource + "." + nextRandomId());
+			Log.d(Config.LOGTAG,
+					account.getJid().toBareJid() + ": switching resource due to conflict ("
+					+ account.getResource() + ")");
+		}
+	}
+
+	private void sendStartStream() throws IOException {
+		final Tag stream = Tag.start("stream:stream");
+		stream.setAttribute("from", account.getJid().toBareJid().toString());
+		stream.setAttribute("to", account.getServer().toString());
+		stream.setAttribute("version", "1.0");
+		stream.setAttribute("xml:lang", "en");
+		stream.setAttribute("xmlns", "jabber:client");
+		stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
+		tagWriter.writeTag(stream);
+	}
+
+	private String nextRandomId() {
+		return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
+	}
+
+	public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
+		packet.setFrom(account.getJid());
+		this.sendUnmodifiedIqPacket(packet,callback);
+
+	}
+
+	private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
+		if (packet.getId() == null) {
+			final String id = nextRandomId();
+			packet.setAttribute("id", id);
+		}
+		if (callback != null) {
+			if (packet.getId() == null) {
+				packet.setId(nextRandomId());
+			}
+			packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
+		}
+		this.sendPacket(packet);
+	}
+
+	public void sendMessagePacket(final MessagePacket packet) {
+		this.sendPacket(packet);
+	}
+
+	public void sendPresencePacket(final PresencePacket packet) {
+		this.sendPacket(packet);
+	}
+
+	private synchronized void sendPacket(final AbstractStanza packet) {
+		final String name = packet.getName();
+		if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
+			++stanzasSent;
+		}
+		tagWriter.writeStanzaAsync(packet);
+		if (packet instanceof MessagePacket && packet.getId() != null && this.streamId != null) {
+			Log.d(Config.LOGTAG, "request delivery report for stanza " + stanzasSent);
+			this.messageReceipts.put(stanzasSent, packet.getId());
+			tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
+		}
+	}
+
+	public void sendPing() {
+		if (streamFeatures.hasChild("sm")) {
+			tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
+		} else {
+			final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+			iq.setFrom(account.getJid());
+			iq.addChild("ping", "urn:xmpp:ping");
+			this.sendIqPacket(iq, null);
+		}
+		this.lastPingSent = SystemClock.elapsedRealtime();
+	}
+
+	public void setOnMessagePacketReceivedListener(
+			final OnMessagePacketReceived listener) {
+		this.messageListener = listener;
+			}
+
+	public void setOnUnregisteredIqPacketReceivedListener(
+			final OnIqPacketReceived listener) {
+		this.unregisteredIqListener = listener;
+			}
+
+	public void setOnPresencePacketReceivedListener(
+			final OnPresencePacketReceived listener) {
+		this.presenceListener = listener;
+			}
+
+	public void setOnJinglePacketReceivedListener(
+			final OnJinglePacketReceived listener) {
+		this.jingleListener = listener;
+			}
+
+	public void setOnStatusChangedListener(final OnStatusChanged listener) {
+		this.statusListener = listener;
+	}
+
+	public void setOnBindListener(final OnBindListener listener) {
+		this.bindListener = listener;
+	}
+
+	public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
+		this.acknowledgedListener = listener;
+	}
+
+	public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
+		if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
+			this.advancedStreamFeaturesLoadedListeners.add(listener);
+		}
+	}
+
+	public void disconnect(final boolean force) {
+		Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
+		try {
+			if (force) {
+				socket.close();
+				return;
+			}
+			new Thread(new Runnable() {
+
+				@Override
+				public void run() {
+					if (tagWriter.isActive()) {
+						tagWriter.finish();
+						try {
+							while (!tagWriter.finished()) {
+								Log.d(Config.LOGTAG, "not yet finished");
+								Thread.sleep(100);
+							}
+							tagWriter.writeTag(Tag.end("stream:stream"));
+							socket.close();
+						} catch (final IOException e) {
+							Log.d(Config.LOGTAG,
+									"io exception during disconnect");
+						} catch (final InterruptedException e) {
+							Log.d(Config.LOGTAG, "interrupted");
+						}
+					}
+				}
+			}).start();
+		} catch (final IOException e) {
+			Log.d(Config.LOGTAG, "io exception during disconnect");
+		}
+	}
+
+	public List<String> findDiscoItemsByFeature(final String feature) {
+		final List<String> items = new ArrayList<>();
+		for (final Entry<String, List<String>> cursor : disco.entrySet()) {
+			if (cursor.getValue().contains(feature)) {
+				items.add(cursor.getKey());
+			}
+		}
+		return items;
+	}
+
+	public String findDiscoItemByFeature(final String feature) {
+		final List<String> items = findDiscoItemsByFeature(feature);
+		if (items.size() >= 1) {
+			return items.get(0);
+		}
+		return null;
+	}
+
+	public void r() {
+		this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
+	}
+
+	public String getMucServer() {
+		for (final Entry<String, List<String>> cursor : disco.entrySet()) {
+			final List<String> value = cursor.getValue();
+			if (value.contains("http://jabber.org/protocol/muc") && !value.contains("jabber:iq:gateway") && !value.contains("siacs:no:muc")) {
+				return cursor.getKey();
+			}
+		}
+		return null;
+	}
+
+	public int getTimeToNextAttempt() {
+		final int interval = (int) (25 * Math.pow(1.5, attempt));
+		final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
+		return interval - secondsSinceLast;
+	}
+
+	public int getAttempt() {
+		return this.attempt;
+	}
+
+	public Features getFeatures() {
+		return this.features;
+	}
+
+	public long getLastSessionEstablished() {
+		final long diff;
+		if (this.lastSessionStarted == 0) {
+			diff = SystemClock.elapsedRealtime() - this.lastConnect;
+		} else {
+			diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
+		}
+		return System.currentTimeMillis() - diff;
+	}
+
+	public long getLastConnect() {
+		return this.lastConnect;
+	}
+
+	public long getLastPingSent() {
+		return this.lastPingSent;
+	}
+
+	public long getLastPacketReceived() {
+		return this.lastPacketReceived;
+	}
+
+	public void sendActive() {
+		this.sendPacket(new ActivePacket());
+	}
+
+	public void sendInactive() {
+		this.sendPacket(new InactivePacket());
+	}
+
+	public void resetAttemptCount() {
+		this.attempt = 0;
+		this.lastConnect = 0;
+	}
+
+	public class Features {
+		XmppConnection connection;
+		private boolean carbonsEnabled = false;
+		private boolean encryptionEnabled = false;
+		private boolean blockListRequested = false;
+
+		public Features(final XmppConnection connection) {
+			this.connection = connection;
+		}
+
+		private boolean hasDiscoFeature(final Jid server, final String feature) {
+			return connection.disco.containsKey(server.toDomainJid().toString()) &&
+				connection.disco.get(server.toDomainJid().toString()).contains(feature);
+		}
+
+		public boolean carbons() {
+			return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
+		}
+
+		public boolean blocking() {
+			return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
+		}
+
+		public boolean register() {
+			return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
+		}
+
+		public boolean sm() {
+			return streamId != null;
+		}
+
+		public boolean csi() {
+			return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
+		}
+
+		public boolean pubsub() {
+			return hasDiscoFeature(account.getServer(),
+					"http://jabber.org/protocol/pubsub#publish");
+		}
+
+		public boolean mam() {
+			return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
+		}
+
+		public boolean advancedStreamFeaturesLoaded() {
+			return disco.containsKey(account.getServer().toString());
+		}
+
+		public boolean rosterVersioning() {
+			return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
+		}
+
+		public void setBlockListRequested(boolean value) {
+			this.blockListRequested = value;
+		}
+	}
+
+	private IqGenerator getIqGenerator() {
+		return mXmppConnectionService.getIqGenerator();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java
new file mode 100644
index 00000000..929d485a
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/chatstate/ChatState.java
@@ -0,0 +1,32 @@
+package de.thedevstack.conversationsplus.xmpp.chatstate;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public enum ChatState {
+
+	ACTIVE, INACTIVE, GONE, COMPOSING, PAUSED, mIncomingChatState;
+
+	public static ChatState parse(Element element) {
+		final String NAMESPACE = "http://jabber.org/protocol/chatstates";
+		if (element.hasChild("active",NAMESPACE)) {
+			return ACTIVE;
+		} else if (element.hasChild("inactive",NAMESPACE)) {
+			return INACTIVE;
+		} else if (element.hasChild("composing",NAMESPACE)) {
+			return COMPOSING;
+		} else if (element.hasChild("gone",NAMESPACE)) {
+			return GONE;
+		} else if (element.hasChild("paused",NAMESPACE)) {
+			return PAUSED;
+		} else {
+			return null;
+		}
+	}
+
+	public static Element toElement(ChatState state) {
+		final String NAMESPACE = "http://jabber.org/protocol/chatstates";
+		final Element element = new Element(state.toString().toLowerCase());
+		element.setAttribute("xmlns",NAMESPACE);
+		return element;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java
new file mode 100644
index 00000000..591d8ada
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Data.java
@@ -0,0 +1,85 @@
+package de.thedevstack.conversationsplus.xmpp.forms;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Data extends Element {
+
+	public Data() {
+		super("x");
+		this.setAttribute("xmlns","jabber:x:data");
+	}
+
+	public List<Field> getFields() {
+		ArrayList<Field> fields = new ArrayList<Field>();
+		for(Element child : getChildren()) {
+			if (child.getName().equals("field")) {
+				fields.add(Field.parse(child));
+			}
+		}
+		return fields;
+	}
+
+	public Field getFieldByName(String needle) {
+		for(Element child : getChildren()) {
+			if (child.getName().equals("field") && needle.equals(child.getAttribute("var"))) {
+				return Field.parse(child);
+			}
+		}
+		return null;
+	}
+
+	public void put(String name, String value) {
+		Field field = getFieldByName(name);
+		if (field == null) {
+			field = new Field(name);
+			this.addChild(field);
+		}
+		field.setValue(value);
+	}
+
+	public void put(String name, Collection<String> values) {
+		Field field = getFieldByName(name);
+		if (field == null) {
+			field = new Field(name);
+			this.addChild(field);
+		}
+		field.setValues(values);
+	}
+
+	public void submit() {
+		this.setAttribute("type","submit");
+		removeNonFieldChildren();
+		for(Field field : getFields()) {
+			field.removeNonValueChildren();
+		}
+	}
+
+	private void removeNonFieldChildren() {
+		for(Iterator<Element> iterator = this.children.iterator(); iterator.hasNext();) {
+			Element element = iterator.next();
+			if (!element.getName().equals("field")) {
+				iterator.remove();
+			}
+		}
+	}
+
+	public static Data parse(Element element) {
+		Data data = new Data();
+		data.setAttributes(element.getAttributes());
+		data.setChildren(element.getChildren());
+		return data;
+	}
+
+	public void setFormType(String formType) {
+		this.put("FORM_TYPE",formType);
+	}
+
+	public String getFormType() {
+		return this.getAttribute("FORM_TYPE");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java
new file mode 100644
index 00000000..9eb2d08d
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/forms/Field.java
@@ -0,0 +1,50 @@
+package de.thedevstack.conversationsplus.xmpp.forms;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Field extends Element {
+
+	public Field(String name) {
+		super("field");
+		this.setAttribute("var",name);
+	}
+
+	private Field() {
+		super("field");
+	}
+
+	public String getName() {
+		return this.getAttribute("var");
+	}
+
+	public void setValue(String value) {
+		this.children.clear();
+		this.addChild("value").setContent(value);
+	}
+
+	public void setValues(Collection<String> values) {
+		this.children.clear();
+		for(String value : values) {
+			this.addChild("value").setContent(value);
+		}
+	}
+
+	public void removeNonValueChildren() {
+		for(Iterator<Element> iterator = this.children.iterator(); iterator.hasNext();) {
+			Element element = iterator.next();
+			if (!element.getName().equals("value")) {
+				iterator.remove();
+			}
+		}
+	}
+
+	public static Field parse(Element element) {
+		Field field = new Field();
+		field.setAttributes(element.getAttributes());
+		field.setChildren(element.getChildren());
+		return field;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java
new file mode 100644
index 00000000..3c8dd717
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/InvalidJidException.java
@@ -0,0 +1,49 @@
+package de.thedevstack.conversationsplus.xmpp.jid;
+
+public class InvalidJidException extends Exception {
+
+    // This is probably not the "Java way", but the "Java way" means we'd have a ton of extra tiny,
+    // annoying classes floating around. I like this.
+    public final static String INVALID_LENGTH = "JID must be between 0 and 3071 characters";
+    public final static String INVALID_PART_LENGTH = "JID part must be between 0 and 1023 characters";
+    public final static String INVALID_CHARACTER = "JID contains an invalid character";
+    public final static String STRINGPREP_FAIL = "The STRINGPREP operation has failed for the given JID";
+	public final static String IS_NULL = "JID can not be NULL";
+
+    /**
+     * Constructs a new {@code Exception} that includes the current stack trace.
+     */
+    public InvalidJidException() {
+    }
+
+    /**
+     * Constructs a new {@code Exception} with the current stack trace and the
+     * specified detail message.
+     *
+     * @param detailMessage the detail message for this exception.
+     */
+    public InvalidJidException(final String detailMessage) {
+        super(detailMessage);
+    }
+
+    /**
+     * Constructs a new {@code Exception} with the current stack trace, the
+     * specified detail message and the specified cause.
+     *
+     * @param detailMessage the detail message for this exception.
+     * @param throwable the cause of this exception.
+     */
+    public InvalidJidException(final String detailMessage, final Throwable throwable) {
+        super(detailMessage, throwable);
+    }
+
+    /**
+     * Constructs a new {@code Exception} with the current stack trace and the
+     * specified cause.
+     *
+     * @param throwable the cause of this exception.
+     */
+    public InvalidJidException(final Throwable throwable) {
+        super(throwable);
+    }
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
new file mode 100644
index 00000000..43b0e878
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jid/Jid.java
@@ -0,0 +1,219 @@
+package de.thedevstack.conversationsplus.xmpp.jid;
+
+import android.util.LruCache;
+
+import net.java.otr4j.session.SessionID;
+
+import java.net.IDN;
+
+import de.thedevstack.conversationsplus.Config;
+import gnu.inet.encoding.Stringprep;
+import gnu.inet.encoding.StringprepException;
+
+/**
+ * The `Jid' class provides an immutable representation of a JID.
+ */
+public final class Jid {
+
+	private static LruCache<String,Jid> cache = new LruCache<>(1024);
+
+	private final String localpart;
+	private final String domainpart;
+	private final String resourcepart;
+
+	// It's much more efficient to store the ful JID as well as the parts instead of figuring them
+	// all out every time (since some characters are displayed but aren't used for comparisons).
+	private final String displayjid;
+
+	public String getLocalpart() {
+		return localpart;
+	}
+
+	public String getDomainpart() {
+		return IDN.toUnicode(domainpart);
+	}
+
+	public String getResourcepart() {
+		return resourcepart;
+	}
+
+	public static Jid fromSessionID(final SessionID id) throws InvalidJidException{
+		if (id.getUserID().isEmpty()) {
+			return Jid.fromString(id.getAccountID());
+		} else {
+			return Jid.fromString(id.getAccountID()+"/"+id.getUserID());
+		}
+	}
+
+	public static Jid fromString(final String jid) throws InvalidJidException {
+		return Jid.fromString(jid, false);
+	}
+
+	public static Jid fromString(final String jid, final boolean safe) throws InvalidJidException {
+		return new Jid(jid, safe);
+	}
+
+	public static Jid fromParts(final String localpart,
+			final String domainpart,
+			final String resourcepart) throws InvalidJidException {
+		String out;
+		if (localpart == null || localpart.isEmpty()) {
+			out = domainpart;
+		} else {
+			out = localpart + "@" + domainpart;
+		}
+		if (resourcepart != null && !resourcepart.isEmpty()) {
+			out = out + "/" + resourcepart;
+		}
+		return new Jid(out, false);
+	}
+
+	private Jid(final String jid, final boolean safe) throws InvalidJidException {
+		if (jid == null) throw new InvalidJidException(InvalidJidException.IS_NULL);
+
+		Jid fromCache = Jid.cache.get(jid);
+		if (fromCache != null) {
+			displayjid = fromCache.displayjid;
+			localpart = fromCache.localpart;
+			domainpart = fromCache.domainpart;
+			resourcepart = fromCache.resourcepart;
+			return;
+		}
+
+		// Hackish Android way to count the number of chars in a string... should work everywhere.
+		final int atCount = jid.length() - jid.replace("@", "").length();
+		final int slashCount = jid.length() - jid.replace("/", "").length();
+
+		// Throw an error if there's anything obvious wrong with the JID...
+		if (jid.isEmpty() || jid.length() > 3071) {
+			throw new InvalidJidException(InvalidJidException.INVALID_LENGTH);
+		}
+
+		// Go ahead and check if the localpart or resourcepart is empty.
+		if (jid.startsWith("@") || (jid.endsWith("@") && slashCount == 0) || jid.startsWith("/") || (jid.endsWith("/") && slashCount < 2)) {
+			throw new InvalidJidException(InvalidJidException.INVALID_CHARACTER);
+		}
+
+		String finaljid;
+
+		final int domainpartStart;
+		final int atLoc = jid.indexOf("@");
+		final int slashLoc = jid.indexOf("/");
+		// If there is no "@" in the JID (eg. "example.net" or "example.net/resource")
+		// or there are one or more "@" signs but they're all in the resourcepart (eg. "example.net/@/rp@"):
+		if (atCount == 0 || (atCount > 0 && slashLoc != -1 && atLoc > slashLoc)) {
+			localpart = "";
+			finaljid = "";
+			domainpartStart = 0;
+		} else {
+			final String lp = jid.substring(0, atLoc);
+			try {
+				localpart = Config.DISABLE_STRING_PREP || safe ? lp : Stringprep.nodeprep(lp);
+			} catch (final StringprepException e) {
+				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
+			}
+			if (localpart.isEmpty() || localpart.length() > 1023) {
+				throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
+			}
+			domainpartStart = atLoc + 1;
+			finaljid = lp + "@";
+		}
+
+		final String dp;
+		if (slashCount > 0) {
+			final String rp = jid.substring(slashLoc + 1, jid.length());
+			try {
+				resourcepart = Config.DISABLE_STRING_PREP || safe ? rp : Stringprep.resourceprep(rp);
+			} catch (final StringprepException e) {
+				throw new InvalidJidException(InvalidJidException.STRINGPREP_FAIL, e);
+			}
+			if (resourcepart.isEmpty() || resourcepart.length() > 1023) {
+				throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
+			}
+			dp = IDN.toUnicode(jid.substring(domainpartStart, slashLoc), IDN.USE_STD3_ASCII_RULES);
+			finaljid = finaljid + dp + "/" + rp;
+		} else {
+			resourcepart = "";
+			dp = IDN.toUnicode(jid.substring(domainpartStart, jid.length()),
+					IDN.USE_STD3_ASCII_RULES);
+			finaljid = finaljid + dp;
+		}
+
+		// Remove trailing "." before storing the domain part.
+		if (dp.endsWith(".")) {
+			try {
+				domainpart = IDN.toASCII(dp.substring(0, dp.length() - 1), IDN.USE_STD3_ASCII_RULES);
+			} catch (final IllegalArgumentException e) {
+				throw new InvalidJidException(e);
+			}
+		} else {
+			try {
+				domainpart = IDN.toASCII(dp, IDN.USE_STD3_ASCII_RULES);
+			} catch (final IllegalArgumentException e) {
+				throw new InvalidJidException(e);
+			}
+		}
+
+		// TODO: Find a proper domain validation library; validate individual parts, separators, etc.
+		if (domainpart.isEmpty() || domainpart.length() > 1023) {
+			throw new InvalidJidException(InvalidJidException.INVALID_PART_LENGTH);
+		}
+
+		Jid.cache.put(jid, this);
+
+		this.displayjid = finaljid;
+	}
+
+	public Jid toBareJid() {
+		try {
+			return resourcepart.isEmpty() ? this : fromParts(localpart, domainpart, "");
+		} catch (final InvalidJidException e) {
+			// This should never happen.
+			return null;
+		}
+	}
+
+	public Jid toDomainJid() {
+		try {
+			return resourcepart.isEmpty() && localpart.isEmpty() ? this : fromString(getDomainpart());
+		} catch (final InvalidJidException e) {
+			// This should never happen.
+			return null;
+		}
+	}
+
+	@Override
+	public String toString() {
+		return displayjid;
+	}
+
+	@Override
+	public boolean equals(final Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+
+		final Jid jid = (Jid) o;
+
+		return jid.hashCode() == this.hashCode();
+	}
+
+	@Override
+	public int hashCode() {
+		int result = localpart.hashCode();
+		result = 31 * result + domainpart.hashCode();
+		result = 31 * result + resourcepart.hashCode();
+		return result;
+	}
+
+	public boolean hasLocalpart() {
+		return !localpart.isEmpty();
+	}
+
+	public boolean isBareJid() {
+		return this.resourcepart.isEmpty();
+	}
+
+	public boolean isDomainJid() {
+		return !this.hasLocalpart();
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleCandidate.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleCandidate.java
new file mode 100644
index 00000000..bf282293
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleCandidate.java
@@ -0,0 +1,147 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class JingleCandidate {
+
+	public static int TYPE_UNKNOWN;
+	public static int TYPE_DIRECT = 0;
+	public static int TYPE_PROXY = 1;
+
+	private boolean ours;
+	private boolean usedByCounterpart = false;
+	private String cid;
+	private String host;
+	private int port;
+	private int type;
+	private Jid jid;
+	private int priority;
+
+	public JingleCandidate(String cid, boolean ours) {
+		this.ours = ours;
+		this.cid = cid;
+	}
+
+	public String getCid() {
+		return cid;
+	}
+
+	public void setHost(String host) {
+		this.host = host;
+	}
+
+	public String getHost() {
+		return this.host;
+	}
+
+	public void setJid(final Jid jid) {
+		this.jid = jid;
+	}
+
+	public Jid getJid() {
+		return this.jid;
+	}
+
+	public void setPort(int port) {
+		this.port = port;
+	}
+
+	public int getPort() {
+		return this.port;
+	}
+
+	public void setType(int type) {
+		this.type = type;
+	}
+
+	public void setType(String type) {
+        switch (type) {
+            case "proxy":
+                this.type = TYPE_PROXY;
+                break;
+            case "direct":
+                this.type = TYPE_DIRECT;
+                break;
+            default:
+                this.type = TYPE_UNKNOWN;
+                break;
+        }
+	}
+
+	public void setPriority(int i) {
+		this.priority = i;
+	}
+
+	public int getPriority() {
+		return this.priority;
+	}
+
+	public boolean equals(JingleCandidate other) {
+		return this.getCid().equals(other.getCid());
+	}
+
+	public boolean equalValues(JingleCandidate other) {
+		return other != null && other.getHost().equals(this.getHost()) && (other.getPort() == this.getPort());
+	}
+
+	public boolean isOurs() {
+		return ours;
+	}
+
+	public int getType() {
+		return this.type;
+	}
+
+	public static List<JingleCandidate> parse(List<Element> canditates) {
+		List<JingleCandidate> parsedCandidates = new ArrayList<>();
+		for (Element c : canditates) {
+			parsedCandidates.add(JingleCandidate.parse(c));
+		}
+		return parsedCandidates;
+	}
+
+	public static JingleCandidate parse(Element candidate) {
+		JingleCandidate parsedCandidate = new JingleCandidate(
+				candidate.getAttribute("cid"), false);
+		parsedCandidate.setHost(candidate.getAttribute("host"));
+		parsedCandidate.setJid(candidate.getAttributeAsJid("jid"));
+		parsedCandidate.setType(candidate.getAttribute("type"));
+		parsedCandidate.setPriority(Integer.parseInt(candidate
+				.getAttribute("priority")));
+		parsedCandidate
+				.setPort(Integer.parseInt(candidate.getAttribute("port")));
+		return parsedCandidate;
+	}
+
+	public Element toElement() {
+		Element element = new Element("candidate");
+		element.setAttribute("cid", this.getCid());
+		element.setAttribute("host", this.getHost());
+		element.setAttribute("port", Integer.toString(this.getPort()));
+		element.setAttribute("jid", this.getJid().toString());
+		element.setAttribute("priority", Integer.toString(this.getPriority()));
+		if (this.getType() == TYPE_DIRECT) {
+			element.setAttribute("type", "direct");
+		} else if (this.getType() == TYPE_PROXY) {
+			element.setAttribute("type", "proxy");
+		}
+		return element;
+	}
+
+	public void flagAsUsedByCounterpart() {
+		this.usedByCounterpart = true;
+	}
+
+	public boolean isUsedByCounterpart() {
+		return this.usedByCounterpart;
+	}
+
+	public String toString() {
+		return this.getHost() + ":" + this.getPort() + " (prio="
+				+ this.getPriority() + ")";
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
new file mode 100644
index 00000000..6348ec7e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
@@ -0,0 +1,971 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map.Entry;
+import java.util.concurrent.ConcurrentHashMap;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.SystemClock;
+import android.util.Log;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Conversation;
+import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.entities.DownloadablePlaceholder;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.Content;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.Reason;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class JingleConnection implements Downloadable {
+
+	private JingleConnectionManager mJingleConnectionManager;
+	private XmppConnectionService mXmppConnectionService;
+
+	protected static final int JINGLE_STATUS_INITIATED = 0;
+	protected static final int JINGLE_STATUS_ACCEPTED = 1;
+	protected static final int JINGLE_STATUS_FINISHED = 4;
+	protected static final int JINGLE_STATUS_TRANSMITTING = 5;
+	protected static final int JINGLE_STATUS_FAILED = 99;
+
+	private int ibbBlockSize = 4096;
+
+	private int mJingleStatus = -1;
+	private int mStatus = Downloadable.STATUS_UNKNOWN;
+	private Message message;
+	private String sessionId;
+	private Account account;
+	private Jid initiator;
+	private Jid responder;
+	private List<JingleCandidate> candidates = new ArrayList<>();
+	private ConcurrentHashMap<String, JingleSocks5Transport> connections = new ConcurrentHashMap<>();
+
+	private String transportId;
+	private Element fileOffer;
+	private DownloadableFile file = null;
+
+	private String contentName;
+	private String contentCreator;
+
+	private int mProgress = 0;
+	private long mLastGuiRefresh = 0;
+
+	private boolean receivedCandidate = false;
+	private boolean sentCandidate = false;
+
+	private boolean acceptedAutomatically = false;
+
+	private JingleTransport transport = null;
+
+	private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
+
+		@Override
+		public void onIqPacketReceived(Account account, IqPacket packet) {
+			if (packet.getType() == IqPacket.TYPE.ERROR) {
+				fail();
+			}
+		}
+	};
+
+	final OnFileTransmissionStatusChanged onFileTransmissionSatusChanged = new OnFileTransmissionStatusChanged() {
+
+		@Override
+		public void onFileTransmitted(DownloadableFile file) {
+			if (responder.equals(account.getJid())) {
+				sendSuccess();
+				if (acceptedAutomatically) {
+					message.markUnread();
+					JingleConnection.this.mXmppConnectionService
+							.getNotificationService().push(message);
+				}
+				mXmppConnectionService.getFileBackend().updateFileParams(message);
+				mXmppConnectionService.databaseBackend.createMessage(message);
+				mXmppConnectionService.markMessage(message,
+						Message.STATUS_RECEIVED);
+			} else {
+				if (message.getEncryption() == Message.ENCRYPTION_PGP || message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
+					file.delete();
+				}
+			}
+			Log.d(Config.LOGTAG,"sucessfully transmitted file:" + file.getAbsolutePath());
+			if (message.getEncryption() != Message.ENCRYPTION_PGP) {
+				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+				intent.setData(Uri.fromFile(file));
+				mXmppConnectionService.sendBroadcast(intent);
+			}
+		}
+
+		@Override
+		public void onFileTransferAborted() {
+			JingleConnection.this.sendCancel();
+			JingleConnection.this.fail();
+		}
+	};
+
+	private OnProxyActivated onProxyActivated = new OnProxyActivated() {
+
+		@Override
+		public void success() {
+			if (initiator.equals(account.getJid())) {
+				Log.d(Config.LOGTAG, "we were initiating. sending file");
+				transport.send(file, onFileTransmissionSatusChanged);
+			} else {
+				transport.receive(file, onFileTransmissionSatusChanged);
+				Log.d(Config.LOGTAG, "we were responding. receiving file");
+			}
+		}
+
+		@Override
+		public void failed() {
+			Log.d(Config.LOGTAG, "proxy activation failed");
+		}
+	};
+
+	public JingleConnection(JingleConnectionManager mJingleConnectionManager) {
+		this.mJingleConnectionManager = mJingleConnectionManager;
+		this.mXmppConnectionService = mJingleConnectionManager
+				.getXmppConnectionService();
+	}
+
+	public String getSessionId() {
+		return this.sessionId;
+	}
+
+	public Account getAccount() {
+		return this.account;
+	}
+
+	public Jid getCounterPart() {
+		return this.message.getCounterpart();
+	}
+
+	public void deliverPacket(JinglePacket packet) {
+		boolean returnResult = true;
+		if (packet.isAction("session-terminate")) {
+			Reason reason = packet.getReason();
+			if (reason != null) {
+				if (reason.hasChild("cancel")) {
+					this.fail();
+				} else if (reason.hasChild("success")) {
+					this.receiveSuccess();
+				} else {
+					this.fail();
+				}
+			} else {
+				this.fail();
+			}
+		} else if (packet.isAction("session-accept")) {
+			returnResult = receiveAccept(packet);
+		} else if (packet.isAction("transport-info")) {
+			returnResult = receiveTransportInfo(packet);
+		} else if (packet.isAction("transport-replace")) {
+			if (packet.getJingleContent().hasIbbTransport()) {
+				returnResult = this.receiveFallbackToIbb(packet);
+			} else {
+				returnResult = false;
+				Log.d(Config.LOGTAG, "trying to fallback to something unknown"
+						+ packet.toString());
+			}
+		} else if (packet.isAction("transport-accept")) {
+			returnResult = this.receiveTransportAccept(packet);
+		} else {
+			Log.d(Config.LOGTAG, "packet arrived in connection. action was "
+					+ packet.getAction());
+			returnResult = false;
+		}
+		IqPacket response;
+		if (returnResult) {
+			response = packet.generateResponse(IqPacket.TYPE.RESULT);
+
+		} else {
+			response = packet.generateResponse(IqPacket.TYPE.ERROR);
+		}
+		account.getXmppConnection().sendIqPacket(response, null);
+	}
+
+	public void init(Message message) {
+		this.contentCreator = "initiator";
+		this.contentName = this.mJingleConnectionManager.nextRandomId();
+		this.message = message;
+		this.message.setDownloadable(this);
+		this.mStatus = Downloadable.STATUS_UPLOADING;
+		this.account = message.getConversation().getAccount();
+		this.initiator = this.account.getJid();
+		this.responder = this.message.getCounterpart();
+		this.sessionId = this.mJingleConnectionManager.nextRandomId();
+		if (this.candidates.size() > 0) {
+			this.sendInitRequest();
+		} else {
+			this.mJingleConnectionManager.getPrimaryCandidate(account,
+					new OnPrimaryCandidateFound() {
+
+						@Override
+						public void onPrimaryCandidateFound(boolean success,
+								final JingleCandidate candidate) {
+							if (success) {
+								final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
+										JingleConnection.this, candidate);
+								connections.put(candidate.getCid(),
+										socksConnection);
+								socksConnection
+										.connect(new OnTransportConnected() {
+
+											@Override
+											public void failed() {
+												Log.d(Config.LOGTAG,
+														"connection to our own primary candidete failed");
+												sendInitRequest();
+											}
+
+											@Override
+											public void established() {
+												Log.d(Config.LOGTAG,
+														"succesfully connected to our own primary candidate");
+												mergeCandidate(candidate);
+												sendInitRequest();
+											}
+										});
+								mergeCandidate(candidate);
+							} else {
+								Log.d(Config.LOGTAG,
+										"no primary candidate of our own was found");
+								sendInitRequest();
+							}
+						}
+					});
+		}
+
+	}
+
+	public void init(Account account, JinglePacket packet) {
+		this.mJingleStatus = JINGLE_STATUS_INITIATED;
+		Conversation conversation = this.mXmppConnectionService
+				.findOrCreateConversation(account,
+						packet.getFrom().toBareJid(), false);
+		this.message = new Message(conversation, "", Message.ENCRYPTION_NONE);
+		this.message.setStatus(Message.STATUS_RECEIVED);
+		this.mStatus = Downloadable.STATUS_OFFER;
+		this.message.setDownloadable(this);
+        final Jid from = packet.getFrom();
+		this.message.setCounterpart(from);
+		this.account = account;
+		this.initiator = packet.getFrom();
+		this.responder = this.account.getJid();
+		this.sessionId = packet.getSessionId();
+		Content content = packet.getJingleContent();
+		this.contentCreator = content.getAttribute("creator");
+		this.contentName = content.getAttribute("name");
+		this.transportId = content.getTransportId();
+		this.mergeCandidates(JingleCandidate.parse(content.socks5transport()
+				.getChildren()));
+		this.fileOffer = packet.getJingleContent().getFileOffer();
+		if (fileOffer != null) {
+			Element fileSize = fileOffer.findChild("size");
+			Element fileNameElement = fileOffer.findChild("name");
+			if (fileNameElement != null) {
+				String[] filename = fileNameElement.getContent()
+						.toLowerCase(Locale.US).toLowerCase().split("\\.");
+				String extension = filename[filename.length - 1];
+				if (Arrays.asList(VALID_IMAGE_EXTENSIONS).contains(extension)) {
+					message.setType(Message.TYPE_IMAGE);
+					message.setRelativeFilePath(message.getUuid()+"."+extension);
+				} else if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(
+						filename[filename.length - 1])) {
+					if (filename.length == 3) {
+						extension = filename[filename.length - 2];
+						if (Arrays.asList(VALID_IMAGE_EXTENSIONS).contains(extension)) {
+							message.setType(Message.TYPE_IMAGE);
+							message.setRelativeFilePath(message.getUuid()+"."+extension);
+						} else {
+							message.setType(Message.TYPE_FILE);
+						}
+						if (filename[filename.length - 1].equals("otr")) {
+							message.setEncryption(Message.ENCRYPTION_OTR);
+						} else {
+							message.setEncryption(Message.ENCRYPTION_PGP);
+						}
+					}
+				} else {
+					message.setType(Message.TYPE_FILE);
+				}
+				if (message.getType() == Message.TYPE_FILE) {
+					String suffix = "";
+					if (!fileNameElement.getContent().isEmpty()) {
+						String parts[] = fileNameElement.getContent().split("/");
+						suffix = parts[parts.length - 1];
+						if (message.getEncryption() == Message.ENCRYPTION_OTR  && suffix.endsWith(".otr")) {
+							suffix = suffix.substring(0,suffix.length() - 4);
+						} else if (message.getEncryption() == Message.ENCRYPTION_PGP && (suffix.endsWith(".pgp") || suffix.endsWith(".gpg"))) {
+							suffix = suffix.substring(0,suffix.length() - 4);
+						}
+					}
+					message.setRelativeFilePath(message.getUuid()+"_"+suffix);
+				}
+				long size = Long.parseLong(fileSize.getContent());
+				message.setBody(Long.toString(size));
+				conversation.add(message);
+				mXmppConnectionService.updateConversationUi();
+				if (size <= this.mJingleConnectionManager.getAutoAcceptFileSize()
+                        && mXmppConnectionService.isDownloadAllowedInConnection()) {
+					Log.d(Config.LOGTAG, "auto accepting file from "
+							+ packet.getFrom());
+					this.acceptedAutomatically = true;
+					this.sendAccept();
+				} else {
+					message.markUnread();
+					Log.d(Config.LOGTAG,
+							"not auto accepting new file offer with size: "
+									+ size
+									+ " allowed size:"
+									+ this.mJingleConnectionManager
+											.getAutoAcceptFileSize());
+					this.mXmppConnectionService.getNotificationService()
+							.push(message);
+				}
+				this.file = this.mXmppConnectionService.getFileBackend()
+						.getFile(message, false);
+				if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+					byte[] key = conversation.getSymmetricKey();
+					if (key == null) {
+						this.sendCancel();
+						this.fail();
+						return;
+					} else {
+						this.file.setKey(key);
+					}
+				}
+				this.file.setExpectedSize(size);
+			} else {
+				this.sendCancel();
+				this.fail();
+			}
+		} else {
+			this.sendCancel();
+			this.fail();
+		}
+	}
+
+	private void sendInitRequest() {
+		JinglePacket packet = this.bootstrapPacket("session-initiate");
+		Content content = new Content(this.contentCreator, this.contentName);
+		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+			content.setTransportId(this.transportId);
+			this.file = this.mXmppConnectionService.getFileBackend().getFile(
+					message, false);
+			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+				Conversation conversation = this.message.getConversation();
+				this.mXmppConnectionService.renewSymmetricKey(conversation);
+				content.setFileOffer(this.file, true);
+				this.file.setKey(conversation.getSymmetricKey());
+			} else {
+				content.setFileOffer(this.file, false);
+			}
+			this.transportId = this.mJingleConnectionManager.nextRandomId();
+			content.setTransportId(this.transportId);
+			content.socks5transport().setChildren(getCandidatesAsElements());
+			packet.setContent(content);
+			this.sendJinglePacket(packet,new OnIqPacketReceived() {
+
+				@Override
+				public void onIqPacketReceived(Account account, IqPacket packet) {
+					if (packet.getType() != IqPacket.TYPE.ERROR) {
+						mJingleStatus = JINGLE_STATUS_INITIATED;
+						mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
+					} else {
+						fail();
+					}
+				}
+			});
+
+		}
+	}
+
+	private List<Element> getCandidatesAsElements() {
+		List<Element> elements = new ArrayList<>();
+		for (JingleCandidate c : this.candidates) {
+			elements.add(c.toElement());
+		}
+		return elements;
+	}
+
+	private void sendAccept() {
+		mJingleStatus = JINGLE_STATUS_ACCEPTED;
+		this.mStatus = Downloadable.STATUS_DOWNLOADING;
+		mXmppConnectionService.updateConversationUi();
+		this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
+			@Override
+			public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) {
+				final JinglePacket packet = bootstrapPacket("session-accept");
+				final Content content = new Content(contentCreator,contentName);
+				content.setFileOffer(fileOffer);
+				content.setTransportId(transportId);
+				if (success && candidate != null && !equalCandidateExists(candidate)) {
+					final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
+							JingleConnection.this,
+							candidate);
+					connections.put(candidate.getCid(), socksConnection);
+					socksConnection.connect(new OnTransportConnected() {
+
+						@Override
+						public void failed() {
+							Log.d(Config.LOGTAG,"connection to our own primary candidate failed");
+							content.socks5transport().setChildren(getCandidatesAsElements());
+							packet.setContent(content);
+							sendJinglePacket(packet);
+							connectNextCandidate();
+						}
+
+						@Override
+						public void established() {
+							Log.d(Config.LOGTAG, "connected to primary candidate");
+							mergeCandidate(candidate);
+							content.socks5transport().setChildren(getCandidatesAsElements());
+							packet.setContent(content);
+							sendJinglePacket(packet);
+							connectNextCandidate();
+						}
+					});
+				} else {
+					Log.d(Config.LOGTAG,"did not find a primary candidate for ourself");
+					content.socks5transport().setChildren(getCandidatesAsElements());
+					packet.setContent(content);
+					sendJinglePacket(packet);
+					connectNextCandidate();
+				}
+			}
+		});
+	}
+
+	private JinglePacket bootstrapPacket(String action) {
+		JinglePacket packet = new JinglePacket();
+		packet.setAction(action);
+		packet.setFrom(account.getJid());
+		packet.setTo(this.message.getCounterpart());
+		packet.setSessionId(this.sessionId);
+		packet.setInitiator(this.initiator);
+		return packet;
+	}
+
+	private void sendJinglePacket(JinglePacket packet) {
+		account.getXmppConnection().sendIqPacket(packet, responseListener);
+	}
+
+	private void sendJinglePacket(JinglePacket packet, OnIqPacketReceived callback) {
+		account.getXmppConnection().sendIqPacket(packet,callback);
+	}
+
+	private boolean receiveAccept(JinglePacket packet) {
+		Content content = packet.getJingleContent();
+		mergeCandidates(JingleCandidate.parse(content.socks5transport()
+				.getChildren()));
+		this.mJingleStatus = JINGLE_STATUS_ACCEPTED;
+		mXmppConnectionService.markMessage(message, Message.STATUS_UNSEND);
+		this.connectNextCandidate();
+		return true;
+	}
+
+	private boolean receiveTransportInfo(JinglePacket packet) {
+		Content content = packet.getJingleContent();
+		if (content.hasSocks5Transport()) {
+			if (content.socks5transport().hasChild("activated")) {
+				if ((this.transport != null) && (this.transport instanceof JingleSocks5Transport)) {
+					onProxyActivated.success();
+				} else {
+					String cid = content.socks5transport().findChild("activated").getAttribute("cid");
+					Log.d(Config.LOGTAG, "received proxy activated (" + cid
+							+ ")prior to choosing our own transport");
+					JingleSocks5Transport connection = this.connections.get(cid);
+					if (connection != null) {
+						connection.setActivated(true);
+					} else {
+						Log.d(Config.LOGTAG, "activated connection not found");
+						this.sendCancel();
+						this.fail();
+					}
+				}
+				return true;
+			} else if (content.socks5transport().hasChild("proxy-error")) {
+				onProxyActivated.failed();
+				return true;
+			} else if (content.socks5transport().hasChild("candidate-error")) {
+				Log.d(Config.LOGTAG, "received candidate error");
+				this.receivedCandidate = true;
+				if ((mJingleStatus == JINGLE_STATUS_ACCEPTED)
+						&& (this.sentCandidate)) {
+					this.connect();
+				}
+				return true;
+			} else if (content.socks5transport().hasChild("candidate-used")) {
+				String cid = content.socks5transport()
+						.findChild("candidate-used").getAttribute("cid");
+				if (cid != null) {
+					Log.d(Config.LOGTAG, "candidate used by counterpart:" + cid);
+					JingleCandidate candidate = getCandidate(cid);
+					candidate.flagAsUsedByCounterpart();
+					this.receivedCandidate = true;
+					if ((mJingleStatus == JINGLE_STATUS_ACCEPTED)
+							&& (this.sentCandidate)) {
+						this.connect();
+					} else {
+						Log.d(Config.LOGTAG,
+								"ignoring because file is already in transmission or we havent sent our candidate yet");
+					}
+					return true;
+				} else {
+					return false;
+				}
+			} else {
+				return false;
+			}
+		} else {
+			return true;
+		}
+	}
+
+	private void connect() {
+		final JingleSocks5Transport connection = chooseConnection();
+		this.transport = connection;
+		if (connection == null) {
+			Log.d(Config.LOGTAG, "could not find suitable candidate");
+			this.disconnectSocks5Connections();
+			if (this.initiator.equals(account.getJid())) {
+				this.sendFallbackToIbb();
+			}
+		} else {
+			this.mJingleStatus = JINGLE_STATUS_TRANSMITTING;
+			if (connection.needsActivation()) {
+				if (connection.getCandidate().isOurs()) {
+					Log.d(Config.LOGTAG, "candidate "
+							+ connection.getCandidate().getCid()
+							+ " was our proxy. going to activate");
+					IqPacket activation = new IqPacket(IqPacket.TYPE.SET);
+					activation.setTo(connection.getCandidate().getJid());
+					activation.query("http://jabber.org/protocol/bytestreams")
+							.setAttribute("sid", this.getSessionId());
+					activation.query().addChild("activate")
+							.setContent(this.getCounterPart().toString());
+					this.account.getXmppConnection().sendIqPacket(activation,
+							new OnIqPacketReceived() {
+
+								@Override
+								public void onIqPacketReceived(Account account,
+										IqPacket packet) {
+									if (packet.getType() == IqPacket.TYPE.ERROR) {
+										onProxyActivated.failed();
+									} else {
+										onProxyActivated.success();
+										sendProxyActivated(connection
+												.getCandidate().getCid());
+									}
+								}
+							});
+				} else {
+					Log.d(Config.LOGTAG,
+							"candidate "
+									+ connection.getCandidate().getCid()
+									+ " was a proxy. waiting for other party to activate");
+				}
+			} else {
+				if (initiator.equals(account.getJid())) {
+					Log.d(Config.LOGTAG, "we were initiating. sending file");
+					connection.send(file, onFileTransmissionSatusChanged);
+				} else {
+					Log.d(Config.LOGTAG, "we were responding. receiving file");
+					connection.receive(file, onFileTransmissionSatusChanged);
+				}
+			}
+		}
+	}
+
+	private JingleSocks5Transport chooseConnection() {
+		JingleSocks5Transport connection = null;
+		for (Entry<String, JingleSocks5Transport> cursor : connections
+				.entrySet()) {
+			JingleSocks5Transport currentConnection = cursor.getValue();
+			// Log.d(Config.LOGTAG,"comparing candidate: "+currentConnection.getCandidate().toString());
+			if (currentConnection.isEstablished()
+					&& (currentConnection.getCandidate().isUsedByCounterpart() || (!currentConnection
+							.getCandidate().isOurs()))) {
+				// Log.d(Config.LOGTAG,"is usable");
+				if (connection == null) {
+					connection = currentConnection;
+				} else {
+					if (connection.getCandidate().getPriority() < currentConnection
+							.getCandidate().getPriority()) {
+						connection = currentConnection;
+					} else if (connection.getCandidate().getPriority() == currentConnection
+							.getCandidate().getPriority()) {
+						// Log.d(Config.LOGTAG,"found two candidates with same priority");
+						if (initiator.equals(account.getJid())) {
+							if (currentConnection.getCandidate().isOurs()) {
+								connection = currentConnection;
+							}
+						} else {
+							if (!currentConnection.getCandidate().isOurs()) {
+								connection = currentConnection;
+							}
+						}
+					}
+				}
+			}
+		}
+		return connection;
+	}
+
+	private void sendSuccess() {
+		JinglePacket packet = bootstrapPacket("session-terminate");
+		Reason reason = new Reason();
+		reason.addChild("success");
+		packet.setReason(reason);
+		this.sendJinglePacket(packet);
+		this.disconnectSocks5Connections();
+		this.mJingleStatus = JINGLE_STATUS_FINISHED;
+		this.message.setStatus(Message.STATUS_RECEIVED);
+		this.message.setDownloadable(null);
+		this.mXmppConnectionService.updateMessage(message);
+		this.mJingleConnectionManager.finishConnection(this);
+	}
+
+	private void sendFallbackToIbb() {
+		Log.d(Config.LOGTAG, "sending fallback to ibb");
+		JinglePacket packet = this.bootstrapPacket("transport-replace");
+		Content content = new Content(this.contentCreator, this.contentName);
+		this.transportId = this.mJingleConnectionManager.nextRandomId();
+		content.setTransportId(this.transportId);
+		content.ibbTransport().setAttribute("block-size",
+				Integer.toString(this.ibbBlockSize));
+		packet.setContent(content);
+		this.sendJinglePacket(packet);
+	}
+
+	private boolean receiveFallbackToIbb(JinglePacket packet) {
+		Log.d(Config.LOGTAG, "receiving fallack to ibb");
+		String receivedBlockSize = packet.getJingleContent().ibbTransport()
+				.getAttribute("block-size");
+		if (receivedBlockSize != null) {
+			int bs = Integer.parseInt(receivedBlockSize);
+			if (bs > this.ibbBlockSize) {
+				this.ibbBlockSize = bs;
+			}
+		}
+		this.transportId = packet.getJingleContent().getTransportId();
+		this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
+		this.transport.receive(file, onFileTransmissionSatusChanged);
+		JinglePacket answer = bootstrapPacket("transport-accept");
+		Content content = new Content("initiator", "a-file-offer");
+		content.setTransportId(this.transportId);
+		content.ibbTransport().setAttribute("block-size",
+				Integer.toString(this.ibbBlockSize));
+		answer.setContent(content);
+		this.sendJinglePacket(answer);
+		return true;
+	}
+
+	private boolean receiveTransportAccept(JinglePacket packet) {
+		if (packet.getJingleContent().hasIbbTransport()) {
+			String receivedBlockSize = packet.getJingleContent().ibbTransport()
+					.getAttribute("block-size");
+			if (receivedBlockSize != null) {
+				int bs = Integer.parseInt(receivedBlockSize);
+				if (bs > this.ibbBlockSize) {
+					this.ibbBlockSize = bs;
+				}
+			}
+			this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
+			this.transport.connect(new OnTransportConnected() {
+
+				@Override
+				public void failed() {
+					Log.d(Config.LOGTAG, "ibb open failed");
+				}
+
+				@Override
+				public void established() {
+					JingleConnection.this.transport.send(file,
+							onFileTransmissionSatusChanged);
+				}
+			});
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	private void receiveSuccess() {
+		this.mJingleStatus = JINGLE_STATUS_FINISHED;
+		this.mXmppConnectionService.markMessage(this.message,Message.STATUS_SEND_RECEIVED);
+		this.disconnectSocks5Connections();
+		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
+			this.transport.disconnect();
+		}
+		this.message.setDownloadable(null);
+		this.mJingleConnectionManager.finishConnection(this);
+	}
+
+	public void cancel() {
+		this.disconnectSocks5Connections();
+		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
+			this.transport.disconnect();
+		}
+		this.sendCancel();
+		this.mJingleConnectionManager.finishConnection(this);
+		if (this.responder.equals(account.getJid())) {
+			this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+			if (this.file!=null) {
+				file.delete();
+			}
+			this.mXmppConnectionService.updateConversationUi();
+		} else {
+			this.mXmppConnectionService.markMessage(this.message,
+					Message.STATUS_SEND_FAILED);
+			this.message.setDownloadable(null);
+		}
+	}
+
+	private void fail() {
+		this.mJingleStatus = JINGLE_STATUS_FAILED;
+		this.disconnectSocks5Connections();
+		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
+			this.transport.disconnect();
+		}
+		if (this.message != null) {
+			if (this.responder.equals(account.getJid())) {
+				this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+				if (this.file!=null) {
+					file.delete();
+				}
+				this.mXmppConnectionService.updateConversationUi();
+			} else {
+				this.mXmppConnectionService.markMessage(this.message,
+						Message.STATUS_SEND_FAILED);
+				this.message.setDownloadable(null);
+			}
+		}
+		this.mJingleConnectionManager.finishConnection(this);
+	}
+
+	private void sendCancel() {
+		JinglePacket packet = bootstrapPacket("session-terminate");
+		Reason reason = new Reason();
+		reason.addChild("cancel");
+		packet.setReason(reason);
+		this.sendJinglePacket(packet);
+	}
+
+	private void connectNextCandidate() {
+		for (JingleCandidate candidate : this.candidates) {
+			if ((!connections.containsKey(candidate.getCid()) && (!candidate
+					.isOurs()))) {
+				this.connectWithCandidate(candidate);
+				return;
+			}
+		}
+		this.sendCandidateError();
+	}
+
+	private void connectWithCandidate(final JingleCandidate candidate) {
+		final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
+				this, candidate);
+		connections.put(candidate.getCid(), socksConnection);
+		socksConnection.connect(new OnTransportConnected() {
+
+			@Override
+			public void failed() {
+				Log.d(Config.LOGTAG,
+						"connection failed with " + candidate.getHost() + ":"
+								+ candidate.getPort());
+				connectNextCandidate();
+			}
+
+			@Override
+			public void established() {
+				Log.d(Config.LOGTAG,
+						"established connection with " + candidate.getHost()
+								+ ":" + candidate.getPort());
+				sendCandidateUsed(candidate.getCid());
+			}
+		});
+	}
+
+	private void disconnectSocks5Connections() {
+		Iterator<Entry<String, JingleSocks5Transport>> it = this.connections
+				.entrySet().iterator();
+		while (it.hasNext()) {
+			Entry<String, JingleSocks5Transport> pairs = it.next();
+			pairs.getValue().disconnect();
+			it.remove();
+		}
+	}
+
+	private void sendProxyActivated(String cid) {
+		JinglePacket packet = bootstrapPacket("transport-info");
+		Content content = new Content(this.contentCreator, this.contentName);
+		content.setTransportId(this.transportId);
+		content.socks5transport().addChild("activated")
+				.setAttribute("cid", cid);
+		packet.setContent(content);
+		this.sendJinglePacket(packet);
+	}
+
+	private void sendCandidateUsed(final String cid) {
+		JinglePacket packet = bootstrapPacket("transport-info");
+		Content content = new Content(this.contentCreator, this.contentName);
+		content.setTransportId(this.transportId);
+		content.socks5transport().addChild("candidate-used")
+				.setAttribute("cid", cid);
+		packet.setContent(content);
+		this.sentCandidate = true;
+		if ((receivedCandidate) && (mJingleStatus == JINGLE_STATUS_ACCEPTED)) {
+			connect();
+		}
+		this.sendJinglePacket(packet);
+	}
+
+	private void sendCandidateError() {
+		JinglePacket packet = bootstrapPacket("transport-info");
+		Content content = new Content(this.contentCreator, this.contentName);
+		content.setTransportId(this.transportId);
+		content.socks5transport().addChild("candidate-error");
+		packet.setContent(content);
+		this.sentCandidate = true;
+		if ((receivedCandidate) && (mJingleStatus == JINGLE_STATUS_ACCEPTED)) {
+			connect();
+		}
+		this.sendJinglePacket(packet);
+	}
+
+	public Jid getInitiator() {
+		return this.initiator;
+	}
+
+	public Jid getResponder() {
+		return this.responder;
+	}
+
+	public int getJingleStatus() {
+		return this.mJingleStatus;
+	}
+
+	private boolean equalCandidateExists(JingleCandidate candidate) {
+		for (JingleCandidate c : this.candidates) {
+			if (c.equalValues(candidate)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	private void mergeCandidate(JingleCandidate candidate) {
+		for (JingleCandidate c : this.candidates) {
+			if (c.equals(candidate)) {
+				return;
+			}
+		}
+		this.candidates.add(candidate);
+	}
+
+	private void mergeCandidates(List<JingleCandidate> candidates) {
+		for (JingleCandidate c : candidates) {
+			mergeCandidate(c);
+		}
+	}
+
+	private JingleCandidate getCandidate(String cid) {
+		for (JingleCandidate c : this.candidates) {
+			if (c.getCid().equals(cid)) {
+				return c;
+			}
+		}
+		return null;
+	}
+
+	public void updateProgress(int i) {
+		this.mProgress = i;
+		if (SystemClock.elapsedRealtime() - this.mLastGuiRefresh > Config.PROGRESS_UI_UPDATE_INTERVAL) {
+			this.mLastGuiRefresh = SystemClock.elapsedRealtime();
+			mXmppConnectionService.updateConversationUi();
+		}
+	}
+
+	interface OnProxyActivated {
+		public void success();
+
+		public void failed();
+	}
+
+	public boolean hasTransportId(String sid) {
+		return sid.equals(this.transportId);
+	}
+
+	public JingleTransport getTransport() {
+		return this.transport;
+	}
+
+	public boolean start() {
+		if (account.getStatus() == Account.State.ONLINE) {
+			if (mJingleStatus == JINGLE_STATUS_INITIATED) {
+				new Thread(new Runnable() {
+
+					@Override
+					public void run() {
+						sendAccept();
+					}
+				}).start();
+			}
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	@Override
+	public int getStatus() {
+		return this.mStatus;
+	}
+
+	@Override
+	public long getFileSize() {
+		if (this.file != null) {
+			return this.file.getExpectedSize();
+		} else {
+			return 0;
+		}
+	}
+
+	@Override
+	public int getProgress() {
+		return this.mProgress;
+	}
+
+	@Override
+	public String getMimeType() {
+		if (this.message.getType() == Message.TYPE_FILE) {
+			String mime = null;
+			String path = this.message.getRelativeFilePath();
+			if (path != null && !this.message.getRelativeFilePath().isEmpty()) {
+				mime = URLConnection.guessContentTypeFromName(this.message.getRelativeFilePath());
+				if (mime!=null) {
+					return  mime;
+				} else {
+					return "";
+				}
+			} else {
+				return "";
+			}
+		} else {
+			return "image/webp";
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
new file mode 100644
index 00000000..eb1bfe2e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
@@ -0,0 +1,164 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import java.math.BigInteger;
+import java.security.SecureRandom;
+import java.util.HashMap;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import android.annotation.SuppressLint;
+import android.util.Log;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
+import de.thedevstack.conversationsplus.services.XmppConnectionService;
+import de.thedevstack.conversationsplus.utils.Xmlns;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.InvalidJidException;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class JingleConnectionManager extends AbstractConnectionManager {
+	private List<JingleConnection> connections = new CopyOnWriteArrayList<>();
+
+	private HashMap<Jid, JingleCandidate> primaryCandidates = new HashMap<>();
+
+	@SuppressLint("TrulyRandom")
+	private SecureRandom random = new SecureRandom();
+
+	public JingleConnectionManager(XmppConnectionService service) {
+		super(service);
+	}
+
+	public void deliverPacket(Account account, JinglePacket packet) {
+		if (packet.isAction("session-initiate")) {
+			JingleConnection connection = new JingleConnection(this);
+			connection.init(account, packet);
+			connections.add(connection);
+		} else {
+			for (JingleConnection connection : connections) {
+				if (connection.getAccount() == account
+						&& connection.getSessionId().equals(
+								packet.getSessionId())
+						&& connection.getCounterPart().equals(packet.getFrom())) {
+					connection.deliverPacket(packet);
+					return;
+				}
+			}
+			IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
+			Element error = response.addChild("error");
+			error.setAttribute("type", "cancel");
+			error.addChild("item-not-found",
+					"urn:ietf:params:xml:ns:xmpp-stanzas");
+			error.addChild("unknown-session", "urn:xmpp:jingle:errors:1");
+			account.getXmppConnection().sendIqPacket(response, null);
+		}
+	}
+
+	public JingleConnection createNewConnection(Message message) {
+		JingleConnection connection = new JingleConnection(this);
+		connection.init(message);
+		this.connections.add(connection);
+		return connection;
+	}
+
+	public JingleConnection createNewConnection(final JinglePacket packet) {
+		JingleConnection connection = new JingleConnection(this);
+		this.connections.add(connection);
+		return connection;
+	}
+
+	public void finishConnection(JingleConnection connection) {
+		this.connections.remove(connection);
+	}
+
+	public void getPrimaryCandidate(Account account,
+			final OnPrimaryCandidateFound listener) {
+		if (Config.NO_PROXY_LOOKUP) {
+			listener.onPrimaryCandidateFound(false, null);
+			return;
+		}
+		if (!this.primaryCandidates.containsKey(account.getJid().toBareJid())) {
+			final String proxy = account.getXmppConnection().findDiscoItemByFeature(Xmlns.BYTE_STREAMS);
+			if (proxy != null) {
+				IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
+				iq.setAttribute("to", proxy);
+				iq.query(Xmlns.BYTE_STREAMS);
+				account.getXmppConnection().sendIqPacket(iq,new OnIqPacketReceived() {
+
+					@Override
+					public void onIqPacketReceived(Account account, IqPacket packet) {
+						Element streamhost = packet.query().findChild("streamhost",Xmlns.BYTE_STREAMS);
+						final String host = streamhost == null ? null : streamhost.getAttribute("host");
+						final String port = streamhost == null ? null : streamhost.getAttribute("port");
+						if (host != null && port != null) {
+							try {
+								JingleCandidate candidate = new JingleCandidate(nextRandomId(), true);
+								candidate.setHost(host);
+								candidate.setPort(Integer.parseInt(port));
+								candidate.setType(JingleCandidate.TYPE_PROXY);
+								candidate.setJid(Jid.fromString(proxy));
+								candidate.setPriority(655360 + 65535);
+								primaryCandidates.put(account.getJid().toBareJid(),candidate);
+								listener.onPrimaryCandidateFound(true,candidate);
+							} catch (final NumberFormatException | InvalidJidException e) {
+								listener.onPrimaryCandidateFound(false,null);
+								return;
+							}
+						} else {
+							listener.onPrimaryCandidateFound(false,null);
+						}
+					}
+				});
+			} else {
+				listener.onPrimaryCandidateFound(false, null);
+			}
+
+		} else {
+			listener.onPrimaryCandidateFound(true,
+					this.primaryCandidates.get(account.getJid().toBareJid()));
+		}
+	}
+
+	public String nextRandomId() {
+		return new BigInteger(50, random).toString(32);
+	}
+
+	public void deliverIbbPacket(Account account, IqPacket packet) {
+		String sid = null;
+		Element payload = null;
+		if (packet.hasChild("open", "http://jabber.org/protocol/ibb")) {
+			payload = packet.findChild("open", "http://jabber.org/protocol/ibb");
+			sid = payload.getAttribute("sid");
+		} else if (packet.hasChild("data", "http://jabber.org/protocol/ibb")) {
+			payload = packet.findChild("data", "http://jabber.org/protocol/ibb");
+			sid = payload.getAttribute("sid");
+		}
+		if (sid != null) {
+			for (JingleConnection connection : connections) {
+				if (connection.getAccount() == account
+						&& connection.hasTransportId(sid)) {
+					JingleTransport transport = connection.getTransport();
+					if (transport instanceof JingleInbandTransport) {
+						JingleInbandTransport inbandTransport = (JingleInbandTransport) transport;
+						inbandTransport.deliverPayload(packet, payload);
+						return;
+					}
+				}
+			}
+			Log.d(Config.LOGTAG,"couldn't deliver payload: " + payload.toString());
+		} else {
+			Log.d(Config.LOGTAG, "no sid found in incoming ibb packet");
+		}
+	}
+
+	public void cancelInTransmission() {
+		for (JingleConnection connection : this.connections) {
+			if (connection.getJingleStatus() == JingleConnection.JINGLE_STATUS_TRANSMITTING) {
+				connection.cancel();
+			}
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
new file mode 100644
index 00000000..7336eff7
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
@@ -0,0 +1,224 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+
+import android.util.Base64;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class JingleInbandTransport extends JingleTransport {
+
+	private Account account;
+	private Jid counterpart;
+	private int blockSize;
+	private int bufferSize;
+	private int seq = 0;
+	private String sessionId;
+
+	private boolean established = false;
+
+	private boolean connected = true;
+
+	private DownloadableFile file;
+	private JingleConnection connection;
+
+	private InputStream fileInputStream = null;
+	private OutputStream fileOutputStream = null;
+	private long remainingSize = 0;
+	private long fileSize = 0;
+	private MessageDigest digest;
+
+	private OnFileTransmissionStatusChanged onFileTransmissionStatusChanged;
+
+	private OnIqPacketReceived onAckReceived = new OnIqPacketReceived() {
+		@Override
+		public void onIqPacketReceived(Account account, IqPacket packet) {
+			if (connected && packet.getType() == IqPacket.TYPE.RESULT) {
+				sendNextBlock();
+			}
+		}
+	};
+
+	public JingleInbandTransport(final JingleConnection connection, final String sid, final int blocksize) {
+		this.connection = connection;
+		this.account = connection.getAccount();
+		this.counterpart = connection.getCounterPart();
+		this.blockSize = blocksize;
+		this.bufferSize = blocksize / 4;
+		this.sessionId = sid;
+	}
+
+	public void connect(final OnTransportConnected callback) {
+		IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+		iq.setTo(this.counterpart);
+		Element open = iq.addChild("open", "http://jabber.org/protocol/ibb");
+		open.setAttribute("sid", this.sessionId);
+		open.setAttribute("stanza", "iq");
+		open.setAttribute("block-size", Integer.toString(this.blockSize));
+		this.connected = true;
+		this.account.getXmppConnection().sendIqPacket(iq,
+				new OnIqPacketReceived() {
+
+					@Override
+					public void onIqPacketReceived(Account account,
+							IqPacket packet) {
+						if (packet.getType() == IqPacket.TYPE.ERROR) {
+							callback.failed();
+						} else {
+							callback.established();
+						}
+					}
+				});
+	}
+
+	@Override
+	public void receive(DownloadableFile file,
+			OnFileTransmissionStatusChanged callback) {
+		this.onFileTransmissionStatusChanged = callback;
+		this.file = file;
+		try {
+			this.digest = MessageDigest.getInstance("SHA-1");
+			digest.reset();
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			this.fileOutputStream = file.createOutputStream();
+			if (this.fileOutputStream == null) {
+				callback.onFileTransferAborted();
+				return;
+			}
+			this.remainingSize = this.fileSize = file.getExpectedSize();
+		} catch (final NoSuchAlgorithmException | IOException e) {
+			callback.onFileTransferAborted();
+		}
+    }
+
+	@Override
+	public void send(DownloadableFile file,
+			OnFileTransmissionStatusChanged callback) {
+		this.onFileTransmissionStatusChanged = callback;
+		this.file = file;
+		try {
+			this.remainingSize = this.file.getSize();
+			this.fileSize = this.remainingSize;
+			this.digest = MessageDigest.getInstance("SHA-1");
+			this.digest.reset();
+			fileInputStream = this.file.createInputStream();
+			if (fileInputStream == null) {
+				callback.onFileTransferAborted();
+				return;
+			}
+			if (this.connected) {
+				this.sendNextBlock();
+			}
+		} catch (NoSuchAlgorithmException e) {
+			callback.onFileTransferAborted();
+		}
+	}
+
+	@Override
+	public void disconnect() {
+		this.connected = false;
+		if (this.fileOutputStream != null) {
+			try {
+				this.fileOutputStream.close();
+			} catch (IOException e) {
+
+			}
+		}
+		if (this.fileInputStream != null) {
+			try {
+				this.fileInputStream.close();
+			} catch (IOException e) {
+
+			}
+		}
+	}
+
+	private void sendNextBlock() {
+		byte[] buffer = new byte[this.bufferSize];
+		try {
+			int count = fileInputStream.read(buffer);
+			if (count == -1) {
+				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+				fileInputStream.close();
+				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
+			} else {
+				this.remainingSize -= count;
+				this.digest.update(buffer);
+				String base64 = Base64.encodeToString(buffer, Base64.NO_WRAP);
+				IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+				iq.setTo(this.counterpart);
+				Element data = iq.addChild("data",
+						"http://jabber.org/protocol/ibb");
+				data.setAttribute("seq", Integer.toString(this.seq));
+				data.setAttribute("block-size",
+						Integer.toString(this.blockSize));
+				data.setAttribute("sid", this.sessionId);
+				data.setContent(base64);
+				this.account.getXmppConnection().sendIqPacket(iq,
+						this.onAckReceived);
+				this.seq++;
+				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
+			}
+		} catch (IOException e) {
+			this.onFileTransmissionStatusChanged.onFileTransferAborted();
+		}
+	}
+
+	private void receiveNextBlock(String data) {
+		try {
+			byte[] buffer = Base64.decode(data, Base64.NO_WRAP);
+			if (this.remainingSize < buffer.length) {
+				buffer = Arrays
+						.copyOfRange(buffer, 0, (int) this.remainingSize);
+			}
+			this.remainingSize -= buffer.length;
+
+
+			this.fileOutputStream.write(buffer);
+
+			this.digest.update(buffer);
+			if (this.remainingSize <= 0) {
+				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+				fileOutputStream.flush();
+				fileOutputStream.close();
+				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
+			} else {
+				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
+			}
+		} catch (IOException e) {
+			this.onFileTransmissionStatusChanged.onFileTransferAborted();
+		}
+	}
+
+	public void deliverPayload(IqPacket packet, Element payload) {
+		if (payload.getName().equals("open")) {
+			if (!established) {
+				established = true;
+				connected = true;
+				this.account.getXmppConnection().sendIqPacket(
+						packet.generateResponse(IqPacket.TYPE.RESULT), null);
+			} else {
+				this.account.getXmppConnection().sendIqPacket(
+						packet.generateResponse(IqPacket.TYPE.ERROR), null);
+			}
+		} else if (connected && payload.getName().equals("data")) {
+			this.receiveNextBlock(payload.getContent());
+			this.account.getXmppConnection().sendIqPacket(
+					packet.generateResponse(IqPacket.TYPE.RESULT), null);
+		} else {
+			// TODO some sort of exception
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
new file mode 100644
index 00000000..a1094dd7
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
@@ -0,0 +1,234 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.utils.CryptoHelper;
+
+public class JingleSocks5Transport extends JingleTransport {
+	private JingleCandidate candidate;
+	private JingleConnection connection;
+	private String destination;
+	private OutputStream outputStream;
+	private InputStream inputStream;
+	private boolean isEstablished = false;
+	private boolean activated = false;
+	protected Socket socket;
+
+	public JingleSocks5Transport(JingleConnection jingleConnection,
+			JingleCandidate candidate) {
+		this.candidate = candidate;
+		this.connection = jingleConnection;
+		try {
+			MessageDigest mDigest = MessageDigest.getInstance("SHA-1");
+			StringBuilder destBuilder = new StringBuilder();
+			destBuilder.append(jingleConnection.getSessionId());
+			if (candidate.isOurs()) {
+				destBuilder.append(jingleConnection.getAccount().getJid());
+				destBuilder.append(jingleConnection.getCounterPart());
+			} else {
+				destBuilder.append(jingleConnection.getCounterPart());
+				destBuilder.append(jingleConnection.getAccount().getJid());
+			}
+			mDigest.reset();
+			this.destination = CryptoHelper.bytesToHex(mDigest
+					.digest(destBuilder.toString().getBytes()));
+		} catch (NoSuchAlgorithmException e) {
+
+		}
+	}
+
+	public void connect(final OnTransportConnected callback) {
+		new Thread(new Runnable() {
+
+			@Override
+			public void run() {
+				try {
+					socket = new Socket(candidate.getHost(),
+							candidate.getPort());
+					inputStream = socket.getInputStream();
+					outputStream = socket.getOutputStream();
+					byte[] login = { 0x05, 0x01, 0x00 };
+					byte[] expectedReply = { 0x05, 0x00 };
+					byte[] reply = new byte[2];
+					outputStream.write(login);
+					inputStream.read(reply);
+					final String connect = Character.toString('\u0005')
+							+ '\u0001' + '\u0000' + '\u0003' + '\u0028'
+							+ destination + '\u0000' + '\u0000';
+					if (Arrays.equals(reply, expectedReply)) {
+						outputStream.write(connect.getBytes());
+						byte[] result = new byte[2];
+						inputStream.read(result);
+						int status = result[1];
+						if (status == 0) {
+							isEstablished = true;
+							callback.established();
+						} else {
+							callback.failed();
+						}
+					} else {
+						socket.close();
+						callback.failed();
+					}
+				} catch (UnknownHostException e) {
+					callback.failed();
+				} catch (IOException e) {
+					callback.failed();
+				}
+			}
+		}).start();
+
+	}
+
+	public void send(final DownloadableFile file,
+			final OnFileTransmissionStatusChanged callback) {
+		new Thread(new Runnable() {
+
+			@Override
+			public void run() {
+				InputStream fileInputStream = null;
+				try {
+					MessageDigest digest = MessageDigest.getInstance("SHA-1");
+					digest.reset();
+					fileInputStream = file.createInputStream();
+					if (fileInputStream == null) {
+						callback.onFileTransferAborted();
+						return;
+					}
+					long size = file.getSize();
+					long transmitted = 0;
+					int count;
+					byte[] buffer = new byte[8192];
+					while ((count = fileInputStream.read(buffer)) > 0) {
+						outputStream.write(buffer, 0, count);
+						digest.update(buffer, 0, count);
+						transmitted += count;
+						connection.updateProgress((int) ((((double) transmitted) / size) * 100));
+					}
+					outputStream.flush();
+					file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+					if (callback != null) {
+						callback.onFileTransmitted(file);
+					}
+				} catch (FileNotFoundException e) {
+					callback.onFileTransferAborted();
+				} catch (IOException e) {
+					callback.onFileTransferAborted();
+				} catch (NoSuchAlgorithmException e) {
+					callback.onFileTransferAborted();
+				} finally {
+					try {
+						if (fileInputStream != null) {
+							fileInputStream.close();
+						}
+					} catch (IOException e) {
+						callback.onFileTransferAborted();
+					}
+				}
+			}
+		}).start();
+
+	}
+
+	public void receive(final DownloadableFile file,
+			final OnFileTransmissionStatusChanged callback) {
+		new Thread(new Runnable() {
+
+			@Override
+			public void run() {
+				try {
+					MessageDigest digest = MessageDigest.getInstance("SHA-1");
+					digest.reset();
+					inputStream.skip(45);
+					socket.setSoTimeout(30000);
+					file.getParentFile().mkdirs();
+					file.createNewFile();
+					OutputStream fileOutputStream = file.createOutputStream();
+					if (fileOutputStream == null) {
+						callback.onFileTransferAborted();
+						return;
+					}
+					double size = file.getExpectedSize();
+					long remainingSize = file.getExpectedSize();
+					byte[] buffer = new byte[8192];
+					int count = buffer.length;
+					while (remainingSize > 0) {
+						count = inputStream.read(buffer);
+						if (count == -1) {
+							callback.onFileTransferAborted();
+							return;
+						} else {
+							fileOutputStream.write(buffer, 0, count);
+							digest.update(buffer, 0, count);
+							remainingSize -= count;
+						}
+						connection.updateProgress((int) (((size - remainingSize) / size) * 100));
+					}
+					fileOutputStream.flush();
+					fileOutputStream.close();
+					file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+					callback.onFileTransmitted(file);
+				} catch (FileNotFoundException e) {
+					callback.onFileTransferAborted();
+				} catch (IOException e) {
+					callback.onFileTransferAborted();
+				} catch (NoSuchAlgorithmException e) {
+					callback.onFileTransferAborted();
+				}
+			}
+		}).start();
+	}
+
+	public boolean isProxy() {
+		return this.candidate.getType() == JingleCandidate.TYPE_PROXY;
+	}
+
+	public boolean needsActivation() {
+		return (this.isProxy() && !this.activated);
+	}
+
+	public void disconnect() {
+		if (this.outputStream != null) {
+			try {
+				this.outputStream.close();
+			} catch (IOException e) {
+
+			}
+		}
+		if (this.inputStream != null) {
+			try {
+				this.inputStream.close();
+			} catch (IOException e) {
+
+			}
+		}
+		if (this.socket != null) {
+			try {
+				this.socket.close();
+			} catch (IOException e) {
+
+			}
+		}
+	}
+
+	public boolean isEstablished() {
+		return this.isEstablished;
+	}
+
+	public JingleCandidate getCandidate() {
+		return this.candidate;
+	}
+
+	public void setActivated(boolean activated) {
+		this.activated = activated;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleTransport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleTransport.java
new file mode 100644
index 00000000..ee0fefff
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleTransport.java
@@ -0,0 +1,15 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+
+public abstract class JingleTransport {
+	public abstract void connect(final OnTransportConnected callback);
+
+	public abstract void receive(final DownloadableFile file,
+			final OnFileTransmissionStatusChanged callback);
+
+	public abstract void send(final DownloadableFile file,
+			final OnFileTransmissionStatusChanged callback);
+
+	public abstract void disconnect();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java
new file mode 100644
index 00000000..86daae81
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnFileTransmissionStatusChanged.java
@@ -0,0 +1,9 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+
+public interface OnFileTransmissionStatusChanged {
+	public void onFileTransmitted(DownloadableFile file);
+
+	public void onFileTransferAborted();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java
new file mode 100644
index 00000000..d6dda138
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnJinglePacketReceived.java
@@ -0,0 +1,9 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xmpp.PacketReceived;
+import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
+
+public interface OnJinglePacketReceived extends PacketReceived {
+	public void onJinglePacketReceived(Account account, JinglePacket packet);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java
new file mode 100644
index 00000000..be1f1d02
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnPrimaryCandidateFound.java
@@ -0,0 +1,6 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+public interface OnPrimaryCandidateFound {
+	public void onPrimaryCandidateFound(boolean success,
+			JingleCandidate canditate);
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnTransportConnected.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnTransportConnected.java
new file mode 100644
index 00000000..91a79a83
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/OnTransportConnected.java
@@ -0,0 +1,7 @@
+package de.thedevstack.conversationsplus.xmpp.jingle;
+
+public interface OnTransportConnected {
+	public void failed();
+
+	public void established();
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java
new file mode 100644
index 00000000..40eec6f1
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Content.java
@@ -0,0 +1,102 @@
+package de.thedevstack.conversationsplus.xmpp.jingle.stanzas;
+
+import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Content extends Element {
+
+	private String transportId;
+
+	private Content(String name) {
+		super(name);
+	}
+
+	public Content() {
+		super("content");
+	}
+
+	public Content(String creator, String name) {
+		super("content");
+		this.setAttribute("creator", creator);
+		this.setAttribute("name", name);
+	}
+
+	public void setTransportId(String sid) {
+		this.transportId = sid;
+	}
+
+	public void setFileOffer(DownloadableFile actualFile, boolean otr) {
+		Element description = this.addChild("description",
+				"urn:xmpp:jingle:apps:file-transfer:3");
+		Element offer = description.addChild("offer");
+		Element file = offer.addChild("file");
+		file.addChild("size").setContent(Long.toString(actualFile.getSize()));
+		if (otr) {
+			file.addChild("name").setContent(actualFile.getName() + ".otr");
+		} else {
+			file.addChild("name").setContent(actualFile.getName());
+		}
+	}
+
+	public Element getFileOffer() {
+		Element description = this.findChild("description",
+				"urn:xmpp:jingle:apps:file-transfer:3");
+		if (description == null) {
+			return null;
+		}
+		Element offer = description.findChild("offer");
+		if (offer == null) {
+			return null;
+		}
+		return offer.findChild("file");
+	}
+
+	public void setFileOffer(Element fileOffer) {
+		Element description = this.findChild("description",
+				"urn:xmpp:jingle:apps:file-transfer:3");
+		if (description == null) {
+			description = this.addChild("description",
+					"urn:xmpp:jingle:apps:file-transfer:3");
+		}
+		description.addChild(fileOffer);
+	}
+
+	public String getTransportId() {
+		if (hasSocks5Transport()) {
+			this.transportId = socks5transport().getAttribute("sid");
+		} else if (hasIbbTransport()) {
+			this.transportId = ibbTransport().getAttribute("sid");
+		}
+		return this.transportId;
+	}
+
+	public Element socks5transport() {
+		Element transport = this.findChild("transport",
+				"urn:xmpp:jingle:transports:s5b:1");
+		if (transport == null) {
+			transport = this.addChild("transport",
+					"urn:xmpp:jingle:transports:s5b:1");
+			transport.setAttribute("sid", this.transportId);
+		}
+		return transport;
+	}
+
+	public Element ibbTransport() {
+		Element transport = this.findChild("transport",
+				"urn:xmpp:jingle:transports:ibb:1");
+		if (transport == null) {
+			transport = this.addChild("transport",
+					"urn:xmpp:jingle:transports:ibb:1");
+			transport.setAttribute("sid", this.transportId);
+		}
+		return transport;
+	}
+
+	public boolean hasSocks5Transport() {
+		return this.hasChild("transport", "urn:xmpp:jingle:transports:s5b:1");
+	}
+
+	public boolean hasIbbTransport() {
+		return this.hasChild("transport", "urn:xmpp:jingle:transports:ibb:1");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/JinglePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/JinglePacket.java
new file mode 100644
index 00000000..db771a0a
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/JinglePacket.java
@@ -0,0 +1,96 @@
+package de.thedevstack.conversationsplus.xmpp.jingle.stanzas;
+
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
+
+public class JinglePacket extends IqPacket {
+	Content content = null;
+	Reason reason = null;
+	Element jingle = new Element("jingle");
+
+	@Override
+	public Element addChild(Element child) {
+		if ("jingle".equals(child.getName())) {
+			Element contentElement = child.findChild("content");
+			if (contentElement != null) {
+				this.content = new Content();
+				this.content.setChildren(contentElement.getChildren());
+				this.content.setAttributes(contentElement.getAttributes());
+			}
+			Element reasonElement = child.findChild("reason");
+			if (reasonElement != null) {
+				this.reason = new Reason();
+				this.reason.setChildren(reasonElement.getChildren());
+				this.reason.setAttributes(reasonElement.getAttributes());
+			}
+			this.jingle.setAttributes(child.getAttributes());
+		}
+		return child;
+	}
+
+	public JinglePacket setContent(Content content) {
+		this.content = content;
+		return this;
+	}
+
+	public Content getJingleContent() {
+		if (this.content == null) {
+			this.content = new Content();
+		}
+		return this.content;
+	}
+
+	public JinglePacket setReason(Reason reason) {
+		this.reason = reason;
+		return this;
+	}
+
+	public Reason getReason() {
+		return this.reason;
+	}
+
+	private void build() {
+		this.children.clear();
+		this.jingle.clearChildren();
+		this.jingle.setAttribute("xmlns", "urn:xmpp:jingle:1");
+		if (this.content != null) {
+			jingle.addChild(this.content);
+		}
+		if (this.reason != null) {
+			jingle.addChild(this.reason);
+		}
+		this.children.add(jingle);
+		this.setAttribute("type", "set");
+	}
+
+	public String getSessionId() {
+		return this.jingle.getAttribute("sid");
+	}
+
+	public void setSessionId(String sid) {
+		this.jingle.setAttribute("sid", sid);
+	}
+
+	@Override
+	public String toString() {
+		this.build();
+		return super.toString();
+	}
+
+	public void setAction(String action) {
+		this.jingle.setAttribute("action", action);
+	}
+
+	public String getAction() {
+		return this.jingle.getAttribute("action");
+	}
+
+	public void setInitiator(final Jid initiator) {
+		this.jingle.setAttribute("initiator", initiator.toString());
+	}
+
+	public boolean isAction(String action) {
+		return action.equalsIgnoreCase(this.getAction());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Reason.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Reason.java
new file mode 100644
index 00000000..a442d8d3
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/stanzas/Reason.java
@@ -0,0 +1,13 @@
+package de.thedevstack.conversationsplus.xmpp.jingle.stanzas;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class Reason extends Element {
+	private Reason(String name) {
+		super(name);
+	}
+
+	public Reason() {
+		super("reason");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java
new file mode 100644
index 00000000..e2ce7174
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/pep/Avatar.java
@@ -0,0 +1,73 @@
+package de.thedevstack.conversationsplus.xmpp.pep;
+
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+import android.util.Base64;
+
+public class Avatar {
+	public String type;
+	public String sha1sum;
+	public String image;
+	public int height;
+	public int width;
+	public long size;
+	public Jid owner;
+
+	public byte[] getImageAsBytes() {
+		return Base64.decode(image, Base64.DEFAULT);
+	}
+
+	public String getFilename() {
+		if (type == null) {
+			return sha1sum;
+		} else if (type.equalsIgnoreCase("image/webp")) {
+			return sha1sum + ".webp";
+		} else if (type.equalsIgnoreCase("image/png")) {
+			return sha1sum + ".png";
+		} else {
+			return sha1sum;
+		}
+	}
+
+	public static Avatar parseMetadata(Element items) {
+		Element item = items.findChild("item");
+		if (item == null) {
+			return null;
+		}
+		Element metadata = item.findChild("metadata");
+		if (metadata == null) {
+			return null;
+		}
+		String primaryId = item.getAttribute("id");
+		if (primaryId == null) {
+			return null;
+		}
+		for (Element child : metadata.getChildren()) {
+			if (child.getName().equals("info")
+					&& primaryId.equals(child.getAttribute("id"))) {
+				Avatar avatar = new Avatar();
+				String height = child.getAttribute("height");
+				String width = child.getAttribute("width");
+				String size = child.getAttribute("bytes");
+				try {
+					if (height != null) {
+						avatar.height = Integer.parseInt(height);
+					}
+					if (width != null) {
+						avatar.width = Integer.parseInt(width);
+					}
+					if (size != null) {
+						avatar.size = Long.parseLong(size);
+					}
+				} catch (NumberFormatException e) {
+					return null;
+				}
+				avatar.type = child.getAttribute("type");
+				avatar.sha1sum = child.getAttribute("id");
+				return avatar;
+			}
+		}
+		return null;
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java
new file mode 100644
index 00000000..d326a214
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/AbstractStanza.java
@@ -0,0 +1,54 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas;
+
+import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.xml.Element;
+import de.thedevstack.conversationsplus.xmpp.jid.Jid;
+
+public class AbstractStanza extends Element {
+
+	protected AbstractStanza(final String name) {
+		super(name);
+	}
+
+	public Jid getTo() {
+		return getAttributeAsJid("to");
+	}
+
+	public Jid getFrom() {
+		return getAttributeAsJid("from");
+	}
+
+	public String getId() {
+		return this.getAttribute("id");
+	}
+
+	public void setTo(final Jid to) {
+		if (to != null) {
+			setAttribute("to", to.toString());
+		}
+	}
+
+	public void setFrom(final Jid from) {
+		if (from != null) {
+			setAttribute("from", from.toString());
+		}
+	}
+
+	public void setId(final String id) {
+		setAttribute("id", id);
+	}
+
+	public boolean fromServer(final Account account) {
+		return getFrom() == null
+			|| getFrom().equals(account.getServer())
+			|| getFrom().equals(account.getJid().toBareJid())
+			|| getFrom().equals(account.getJid());
+	}
+
+	public boolean toServer(final Account account) {
+		return getTo() == null
+			|| getTo().equals(account.getServer())
+			|| getTo().equals(account.getJid().toBareJid())
+			|| getTo().equals(account.getJid());
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java
new file mode 100644
index 00000000..fb08556b
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/IqPacket.java
@@ -0,0 +1,63 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class IqPacket extends AbstractStanza {
+
+	public static enum TYPE {
+		ERROR,
+		SET,
+		RESULT,
+		GET,
+		INVALID
+	}
+
+	public IqPacket(final TYPE type) {
+		super("iq");
+		if (type != TYPE.INVALID) {
+			this.setAttribute("type", type.toString().toLowerCase());
+		}
+	}
+
+	public IqPacket() {
+		super("iq");
+	}
+
+	public Element query() {
+		Element query = findChild("query");
+		if (query == null) {
+			query = addChild("query");
+		}
+		return query;
+	}
+
+	public Element query(final String xmlns) {
+		final Element query = query();
+		query.setAttribute("xmlns", xmlns);
+		return query();
+	}
+
+	public TYPE getType() {
+		final String type = getAttribute("type");
+		switch (type) {
+			case "error":
+				return TYPE.ERROR;
+			case "result":
+				return TYPE.RESULT;
+			case "set":
+				return TYPE.SET;
+			case "get":
+				return TYPE.GET;
+			default:
+				return TYPE.INVALID;
+		}
+	}
+
+	public IqPacket generateResponse(final TYPE type) {
+		final IqPacket packet = new IqPacket(type);
+		packet.setTo(this.getFrom());
+		packet.setId(this.getId());
+		return packet;
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
new file mode 100644
index 00000000..db1cce54
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
@@ -0,0 +1,69 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas;
+
+import de.thedevstack.conversationsplus.xml.Element;
+
+public class MessagePacket extends AbstractStanza {
+	public static final int TYPE_CHAT = 0;
+	public static final int TYPE_NORMAL = 2;
+	public static final int TYPE_GROUPCHAT = 3;
+	public static final int TYPE_ERROR = 4;
+	public static final int TYPE_HEADLINE = 5;
+
+	public MessagePacket() {
+		super("message");
+	}
+
+	public String getBody() {
+		Element body = this.findChild("body");
+		if (body != null) {
+			return body.getContent();
+		} else {
+			return null;
+		}
+	}
+
+	public void setBody(String text) {
+		this.children.remove(findChild("body"));
+		Element body = new Element("body");
+		body.setContent(text);
+		this.children.add(0, body);
+	}
+
+	public void setType(int type) {
+		switch (type) {
+		case TYPE_CHAT:
+			this.setAttribute("type", "chat");
+			break;
+		case TYPE_GROUPCHAT:
+			this.setAttribute("type", "groupchat");
+			break;
+		case TYPE_NORMAL:
+			break;
+		case TYPE_ERROR:
+			this.setAttribute("type","error");
+			break;
+		default:
+			this.setAttribute("type", "chat");
+			break;
+		}
+	}
+
+	public int getType() {
+		String type = getAttribute("type");
+		if (type == null) {
+			return TYPE_NORMAL;
+		} else if (type.equals("normal")) {
+			return TYPE_NORMAL;
+		} else if (type.equals("chat")) {
+			return TYPE_CHAT;
+		} else if (type.equals("groupchat")) {
+			return TYPE_GROUPCHAT;
+		} else if (type.equals("error")) {
+			return TYPE_ERROR;
+		} else if (type.equals("headline")) {
+			return TYPE_HEADLINE;
+		} else {
+			return TYPE_NORMAL;
+		}
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java
new file mode 100644
index 00000000..dfe40f87
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/PresencePacket.java
@@ -0,0 +1,8 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas;
+
+public class PresencePacket extends AbstractStanza {
+
+	public PresencePacket() {
+		super("presence");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/ActivePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/ActivePacket.java
new file mode 100644
index 00000000..47538a64
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/ActivePacket.java
@@ -0,0 +1,10 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.csi;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class ActivePacket extends AbstractStanza {
+	public ActivePacket() {
+		super("active");
+		setAttribute("xmlns", "urn:xmpp:csi:0");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/InactivePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/InactivePacket.java
new file mode 100644
index 00000000..ca5904a5
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/csi/InactivePacket.java
@@ -0,0 +1,10 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.csi;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class InactivePacket extends AbstractStanza {
+	public InactivePacket() {
+		super("inactive");
+		setAttribute("xmlns", "urn:xmpp:csi:0");
+	}
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/AckPacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/AckPacket.java
new file mode 100644
index 00000000..fe1740da
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/AckPacket.java
@@ -0,0 +1,13 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class AckPacket extends AbstractStanza {
+
+	public AckPacket(int sequence, int smVersion) {
+		super("a");
+		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
+		this.setAttribute("h", Integer.toString(sequence));
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/EnablePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/EnablePacket.java
new file mode 100644
index 00000000..ce416f27
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/EnablePacket.java
@@ -0,0 +1,13 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class EnablePacket extends AbstractStanza {
+
+	public EnablePacket(int smVersion) {
+		super("enable");
+		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
+		this.setAttribute("resume", "true");
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/RequestPacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/RequestPacket.java
new file mode 100644
index 00000000..eb6217ae
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/RequestPacket.java
@@ -0,0 +1,12 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class RequestPacket extends AbstractStanza {
+
+	public RequestPacket(int smVersion) {
+		super("r");
+		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
+	}
+
+}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/ResumePacket.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/ResumePacket.java
new file mode 100644
index 00000000..90bf566e
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/streammgmt/ResumePacket.java
@@ -0,0 +1,14 @@
+package de.thedevstack.conversationsplus.xmpp.stanzas.streammgmt;
+
+import de.thedevstack.conversationsplus.xmpp.stanzas.AbstractStanza;
+
+public class ResumePacket extends AbstractStanza {
+
+	public ResumePacket(String id, int sequence, int smVersion) {
+		super("resume");
+		this.setAttribute("xmlns", "urn:xmpp:sm:" + smVersion);
+		this.setAttribute("previd", id);
+		this.setAttribute("h", Integer.toString(sequence));
+	}
+
+}
author	steckbrief <steckbrief@chefmail.de>	2015-05-03 22:25:46 +0200
committer	lookshe <github@lookshe.org>	2015-06-19 09:46:40 +0200
commit	7382e3af9769f76fe4e19934a59e45a3f9858332 (patch)
tree	c37cdb03dfaeaccde7c8dd7c79887bf0de278f83 /src/main/java/de
parent	b3b4a2902e37fb072e800f5dff0392755f5d4501 (diff)