Merge branch 'master' of ssh://git.fucktheforce.de/conversations

Conflicts:
	src/main/java/eu/siacs/conversations/Config.java
	src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
	src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
	src/main/java/eu/siacs/conversations/utils/UIHelper.java

63 files changed, 3729 insertions, 2191 deletions

diff --git a/src/main/java/eu/siacs/conversations/Config.java b/src/main/java/eu/siacs/conversations/Config.java
index 8b46335a..ad874660 100644
--- a/src/main/java/eu/siacs/conversations/Config.java
+++ b/src/main/java/eu/siacs/conversations/Config.java
@@ -20,10 +20,18 @@ public final class Config {
 
 	public static final boolean PARSE_EMOTICONS = false;
 	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 boolean NO_PROXY_LOOKUP = false; //useful to debug ibb
 
+	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;
+
 	private Config() {
 
 	}
diff --git a/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java b/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
index 642d0ed0..7f7b350c 100644
--- a/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
+++ b/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
@@ -34,7 +34,7 @@ import net.java.otr4j.crypto.OtrCryptoException;
 import net.java.otr4j.session.InstanceTag;
 import net.java.otr4j.session.SessionID;
 
-public class OtrEngine implements OtrEngineHost {
+public class OtrEngine extends OtrCryptoEngineImpl implements OtrEngineHost {
 
 	private Account account;
 	private OtrPolicy otrPolicy;
@@ -126,7 +126,7 @@ public class OtrEngine implements OtrEngineHost {
 	@Override
 	public byte[] getLocalFingerprintRaw(SessionID arg0) {
 		try {
-			return new OtrCryptoEngineImpl().getFingerprintRaw(getPublicKey());
+			return getFingerprintRaw(getPublicKey());
 		} catch (OtrCryptoException e) {
 			return null;
 		}
@@ -180,6 +180,7 @@ public class OtrEngine implements OtrEngineHost {
 		packet.setBody(body);
 		packet.addChild("private", "urn:xmpp:carbons:2");
 		packet.addChild("no-copy", "urn:xmpp:hints");
+		packet.addChild("no-store", "urn:xmpp:hints");
 		packet.setType(MessagePacket.TYPE_CHAT);
 		account.getXmppConnection().sendMessagePacket(packet);
 	}
@@ -257,10 +258,10 @@ public class OtrEngine implements OtrEngineHost {
 			Conversation conversation = this.mXmppConnectionService.find(this.account,jid);
 			if (conversation!=null) {
 				if (approved) {
-					conversation.getContact().addOtrFingerprint(CryptoHelper.prettifyFingerprint(fingerprint));
+					conversation.getContact().addOtrFingerprint(fingerprint);
 				}
 				conversation.smp().hint = null;
-				conversation.smp().status = Conversation.Smp.STATUS_FINISHED;
+				conversation.smp().status = Conversation.Smp.STATUS_VERIFIED;
 				mXmppConnectionService.updateConversationUi();
 				mXmppConnectionService.syncRosterToDisk(conversation.getAccount());
 			}
diff --git a/src/main/java/eu/siacs/conversations/crypto/sasl/Plain.java b/src/main/java/eu/siacs/conversations/crypto/sasl/Plain.java
index c7dedc5e..40a55151 100644
--- a/src/main/java/eu/siacs/conversations/crypto/sasl/Plain.java
+++ b/src/main/java/eu/siacs/conversations/crypto/sasl/Plain.java
@@ -14,7 +14,7 @@ public class Plain extends SaslMechanism {
 
 	@Override
 	public int getPriority() {
-		return 0;
+		return 10;
 	}
 
 	@Override
diff --git a/src/main/java/eu/siacs/conversations/entities/AbstractEntity.java b/src/main/java/eu/siacs/conversations/entities/AbstractEntity.java
index 92b8a729..957b0a14 100644
--- a/src/main/java/eu/siacs/conversations/entities/AbstractEntity.java
+++ b/src/main/java/eu/siacs/conversations/entities/AbstractEntity.java
@@ -17,5 +17,4 @@ public abstract class AbstractEntity {
 	public boolean equals(AbstractEntity entity) {
 		return this.getUuid().equals(entity.getUuid());
 	}
-
 }
diff --git a/src/main/java/eu/siacs/conversations/entities/Account.java b/src/main/java/eu/siacs/conversations/entities/Account.java
index 538d0ec2..b0cde62c 100644
--- a/src/main/java/eu/siacs/conversations/entities/Account.java
+++ b/src/main/java/eu/siacs/conversations/entities/Account.java
@@ -10,9 +10,12 @@ 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 eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
@@ -56,7 +59,7 @@ public class Account extends AbstractEntity {
 		SECURITY_ERROR(true),
 		INCOMPATIBLE_SERVER(true);
 
-		private boolean isError;
+		private final boolean isError;
 
 		public boolean isError() {
 			return this.isError;
@@ -116,11 +119,11 @@ public class Account extends AbstractEntity {
 	protected boolean online = false;
 	private OtrEngine otrEngine = null;
 	private XmppConnection xmppConnection = null;
-	private Presences presences = new Presences();
 	private long mEndGracePeriod = 0L;
 	private String otrFingerprint;
-	private Roster roster = null;
+	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";
@@ -150,7 +153,7 @@ public class Account extends AbstractEntity {
 		this.avatar = avatar;
 	}
 
-	public static Account fromCursor(Cursor cursor) {
+	public static Account fromCursor(final Cursor cursor) {
 		Jid jid = null;
 		try {
 			jid = Jid.fromParts(cursor.getString(cursor.getColumnIndex(USERNAME)),
@@ -166,11 +169,11 @@ public class Account extends AbstractEntity {
 				cursor.getString(cursor.getColumnIndex(AVATAR)));
 	}
 
-	public boolean isOptionSet(int option) {
+	public boolean isOptionSet(final int option) {
 		return ((options & (1 << option)) != 0);
 	}
 
-	public void setOption(int option, boolean value) {
+	public void setOption(final int option, final boolean value) {
 		if (value) {
 			this.options |= 1 << option;
 		} else {
@@ -241,34 +244,18 @@ public class Account extends AbstractEntity {
 		return keys;
 	}
 
-	public String getSSLFingerprint() {
-		if (keys.has("ssl_cert")) {
-			try {
-				return keys.getString("ssl_cert");
-			} catch (JSONException e) {
-				return null;
-			}
-		} else {
-			return null;
-		}
-	}
-
-	public void setSSLCertFingerprint(String fingerprint) {
-		this.setKey("ssl_cert", fingerprint);
-	}
-
-	public boolean setKey(String keyName, String keyValue) {
+	public boolean setKey(final String keyName, final String keyValue) {
 		try {
 			this.keys.put(keyName, keyValue);
 			return true;
-		} catch (JSONException e) {
+		} catch (final JSONException e) {
 			return false;
 		}
 	}
 
 	@Override
 	public ContentValues getContentValues() {
-		ContentValues values = new ContentValues();
+		final ContentValues values = new ContentValues();
 		values.put(UUID, uuid);
 		values.put(USERNAME, jid.getLocalpart());
 		values.put(SERVER, jid.getDomainpart());
@@ -280,7 +267,7 @@ public class Account extends AbstractEntity {
 		return values;
 	}
 
-	public void initOtrEngine(XmppConnectionService context) {
+	public void initOtrEngine(final XmppConnectionService context) {
 		this.otrEngine = new OtrEngine(context, this);
 	}
 
@@ -292,7 +279,7 @@ public class Account extends AbstractEntity {
 		return this.xmppConnection;
 	}
 
-	public void setXmppConnection(XmppConnection connection) {
+	public void setXmppConnection(final XmppConnection connection) {
 		this.xmppConnection = connection;
 	}
 
@@ -302,8 +289,8 @@ public class Account extends AbstractEntity {
 				if (this.otrEngine == null) {
 					return null;
 				}
-				DSAPublicKey publicKey = (DSAPublicKey) this.otrEngine.getPublicKey();
-				if (publicKey == null) {
+				final PublicKey publicKey = this.otrEngine.getPublicKey();
+				if (publicKey == null || !(publicKey instanceof DSAPublicKey)) {
 					return null;
 				}
 				this.otrFingerprint = new OtrCryptoEngineImpl().getFingerprint(publicKey);
@@ -324,31 +311,19 @@ public class Account extends AbstractEntity {
 		}
 	}
 
-	public void setRosterVersion(String version) {
+	public void setRosterVersion(final String version) {
 		this.rosterVersion = version;
 	}
 
-	public void updatePresence(String resource, int status) {
-		this.presences.updatePresence(resource, status);
-	}
-
-	public void removePresence(String resource) {
-		this.presences.removePresence(resource);
-	}
-
-	public void clearPresences() {
-		this.presences = new Presences();
-	}
-
 	public int countPresences() {
-		return this.presences.size();
+		return this.getRoster().getContact(this.getJid().toBareJid()).getPresences().size();
 	}
 
 	public String getPgpSignature() {
 		if (keys.has("pgp_signature")) {
 			try {
 				return keys.getString("pgp_signature");
-			} catch (JSONException e) {
+			} catch (final JSONException e) {
 				return null;
 			}
 		} else {
@@ -357,9 +332,6 @@ public class Account extends AbstractEntity {
 	}
 
 	public Roster getRoster() {
-		if (this.roster == null) {
-			this.roster = new Roster(this);
-		}
 		return this.roster;
 	}
 
@@ -367,12 +339,12 @@ public class Account extends AbstractEntity {
 		return this.bookmarks;
 	}
 
-	public void setBookmarks(List<Bookmark> bookmarks) {
+	public void setBookmarks(final List<Bookmark> bookmarks) {
 		this.bookmarks = bookmarks;
 	}
 
 	public boolean hasBookmarkFor(final Jid conferenceJid) {
-		for (Bookmark bookmark : this.bookmarks) {
+		for (final Bookmark bookmark : this.bookmarks) {
 			final Jid jid = bookmark.getJid();
 			if (jid != null && jid.equals(conferenceJid.toBareJid())) {
 				return true;
@@ -381,7 +353,7 @@ public class Account extends AbstractEntity {
 		return false;
 	}
 
-	public boolean setAvatar(String filename) {
+	public boolean setAvatar(final String filename) {
 		if (this.avatar != null && this.avatar.equals(filename)) {
 			return false;
 		} else {
@@ -408,11 +380,32 @@ public class Account extends AbstractEntity {
 	}
 
 	public String getShareableUri() {
-		String fingerprint = this.getOtrFingerprint();
+		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/eu/siacs/conversations/entities/Blockable.java b/src/main/java/eu/siacs/conversations/entities/Blockable.java
new file mode 100644
index 00000000..dbcd55c4
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/entities/Blockable.java
@@ -0,0 +1,11 @@
+package eu.siacs.conversations.entities;
+
+import eu.siacs.conversations.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/eu/siacs/conversations/entities/Bookmark.java b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
index 559e2f2d..f81f1a87 100644
--- a/src/main/java/eu/siacs/conversations/entities/Bookmark.java
+++ b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
@@ -6,7 +6,6 @@ import java.util.Locale;
 
 import eu.siacs.conversations.utils.UIHelper;
 import eu.siacs.conversations.xml.Element;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
 public class Bookmark extends Element implements ListItem {
@@ -60,16 +59,7 @@ public class Bookmark extends Element implements ListItem {
 
 	@Override
 	public Jid getJid() {
-		final String jid = this.getAttribute("jid");
-		if (jid != null) {
-			try {
-				return Jid.fromString(jid);
-			} catch (final InvalidJidException e) {
-				return null;
-			}
-		} else {
-			return null;
-		}
+		return this.getAttributeAsJid("jid");
 	}
 
 	@Override
@@ -102,9 +92,7 @@ public class Bookmark extends Element implements ListItem {
 	}
 
 	public boolean autojoin() {
-		String autojoin = this.getAttribute("autojoin");
-		return (autojoin != null && (autojoin.equalsIgnoreCase("true") || autojoin
-				.equalsIgnoreCase("1")));
+		return this.getAttributeAsBoolean("autojoin");
 	}
 
 	public String getPassword() {
diff --git a/src/main/java/eu/siacs/conversations/entities/Contact.java b/src/main/java/eu/siacs/conversations/entities/Contact.java
index 6a6b41d6..698e0322 100644
--- a/src/main/java/eu/siacs/conversations/entities/Contact.java
+++ b/src/main/java/eu/siacs/conversations/entities/Contact.java
@@ -16,7 +16,7 @@ import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
-public class Contact implements ListItem {
+public class Contact implements ListItem, Blockable {
 	public static final String TABLENAME = "contacts";
 
 	public static final String SYSTEMNAME = "systemname";
@@ -47,8 +47,8 @@ public class Contact implements ListItem {
 	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) {
+			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;
@@ -122,11 +122,10 @@ public class Contact implements ListItem {
 
 	@Override
 	public List<Tag> getTags() {
-		ArrayList<Tag> tags = new ArrayList<Tag>();
-		for (String group : getGroups()) {
+		final ArrayList<Tag> tags = new ArrayList<>();
+		for (final String group : getGroups()) {
 			tags.add(new Tag(group, UIHelper.getColorForName(group)));
 		}
-		int status = getMostAvailableStatus();
 		switch (getMostAvailableStatus()) {
 			case Presences.CHAT:
 			case Presences.ONLINE:
@@ -142,6 +141,9 @@ public class Contact implements ListItem {
 				tags.add(new Tag("dnd", 0xffe51c23));
 				break;
 		}
+		if (isBlocked()) {
+			tags.add(new Tag("blocked", 0xff2e2f3b));
+		}
 		return tags;
 	}
 
@@ -176,7 +178,7 @@ public class Contact implements ListItem {
 	}
 
 	public ContentValues getContentValues() {
-		ContentValues values = new ContentValues();
+		final ContentValues values = new ContentValues();
 		values.put(ACCOUNT, accountUuid);
 		values.put(SYSTEMNAME, systemName);
 		values.put(SERVERNAME, serverName);
@@ -213,11 +215,11 @@ public class Contact implements ListItem {
 		this.presences = pres;
 	}
 
-	public void updatePresence(String resource, int status) {
+	public void updatePresence(final String resource, final int status) {
 		this.presences.updatePresence(resource, status);
 	}
 
-	public void removePresence(String resource) {
+	public void removePresence(final String resource) {
 		this.presences.removePresence(resource);
 	}
 
@@ -266,13 +268,15 @@ public class Contact implements ListItem {
 	}
 
 	public ArrayList<String> getOtrFingerprints() {
-		ArrayList<String> fingerprints = new ArrayList<String>();
+		final ArrayList<String> fingerprints = new ArrayList<String>();
 		try {
 			if (this.keys.has("otr_fingerprints")) {
-				JSONArray prints = this.keys
-						.getJSONArray("otr_fingerprints");
+				final JSONArray prints = this.keys.getJSONArray("otr_fingerprints");
 				for (int i = 0; i < prints.length(); ++i) {
-					fingerprints.add(prints.getString(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) {
@@ -335,8 +339,8 @@ public class Contact implements ListItem {
 
 	public boolean showInRoster() {
 		return (this.getOption(Contact.Options.IN_ROSTER) && (!this
-				.getOption(Contact.Options.DIRTY_DELETE)))
-				|| (this.getOption(Contact.Options.DIRTY_PUSH));
+					.getOption(Contact.Options.DIRTY_DELETE)))
+			|| (this.getOption(Contact.Options.DIRTY_PUSH));
 	}
 
 	public void parseSubscriptionFromElement(Element item) {
@@ -426,7 +430,7 @@ public class Contact implements ListItem {
 			if (this.keys.has("otr_fingerprints")) {
 				JSONArray newPrints = new JSONArray();
 				JSONArray oldPrints = this.keys
-						.getJSONArray("otr_fingerprints");
+					.getJSONArray("otr_fingerprints");
 				for (int i = 0; i < oldPrints.length(); ++i) {
 					if (!oldPrints.getString(i).equals(fingerprint)) {
 						newPrints.put(oldPrints.getString(i));
@@ -449,28 +453,46 @@ public class Contact implements ListItem {
 	public String getShareableUri() {
 		if (getOtrFingerprints().size() >= 1) {
 			String otr = getOtrFingerprints().get(0);
-			return "xmpp:" + getJid().toBareJid().toString() + "?otr-fingerprint=" + otr.replace(" ", "");
+			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() {
-			time = 0;
-			presence = null;
+			this(null, 0);
 		}
 
 		public Lastseen(final String presence, final long time) {
-			this.time = time;
 			this.presence = presence;
+			this.time = time;
 		}
 	}
 
-	public class Options {
+	public final class Options {
 		public static final int TO = 0;
 		public static final int FROM = 1;
 		public static final int ASKING = 2;
diff --git a/src/main/java/eu/siacs/conversations/entities/Conversation.java b/src/main/java/eu/siacs/conversations/entities/Conversation.java
index a7da0bc2..470bd290 100644
--- a/src/main/java/eu/siacs/conversations/entities/Conversation.java
+++ b/src/main/java/eu/siacs/conversations/entities/Conversation.java
@@ -16,12 +16,15 @@ 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 eu.siacs.conversations.Config;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
-public class Conversation extends AbstractEntity {
+public class Conversation extends AbstractEntity implements Blockable {
 	public static final String TABLENAME = "conversations";
 
 	public static final int STATUS_AVAILABLE = 0;
@@ -43,6 +46,7 @@ public class Conversation extends AbstractEntity {
 	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;
@@ -72,6 +76,140 @@ public class Conversation extends AbstractEntity {
 
 	private Bookmark bookmark;
 
+	private boolean messagesLeftOnServer = true;
+
+	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(OnMessageFound onMessageFound) {
+		synchronized (this.messages) {
+			for (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(String uuid) {
+		synchronized (this.messages) {
+			for (Message message : this.messages) {
+				if (message.getType() == Message.TYPE_IMAGE
+						&& message.getEncryption() != Message.ENCRYPTION_PGP
+						&& message.getUuid().equals(uuid)) {
+					return message;
+						}
+			}
+		}
+		return null;
+	}
+
+	public void clearMessages() {
+		synchronized (this.messages) {
+			this.messages.clear();
+		}
+	}
+
+	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 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
@@ -98,18 +236,11 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
-	public List<Message> getMessages() {
-		return messages;
-	}
-
 	public boolean isRead() {
-        return (this.messages == null) || (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead();
-    }
+		return (this.messages.size() == 0) || this.messages.get(this.messages.size() - 1).isRead();
+	}
 
 	public void markRead() {
-		if (this.messages == null) {
-			return;
-		}
 		for (int i = this.messages.size() - 1; i >= 0; --i) {
 			if (messages.get(i).isRead()) {
 				break;
@@ -119,9 +250,6 @@ public class Conversation extends AbstractEntity {
 	}
 
 	public Message getLatestMarkableMessage() {
-		if (this.messages == null) {
-			return null;
-		}
 		for (int i = this.messages.size() - 1; i >= 0; --i) {
 			if (this.messages.get(i).getStatus() <= Message.STATUS_RECEIVED
 					&& this.messages.get(i).markable) {
@@ -130,13 +258,13 @@ public class Conversation extends AbstractEntity {
 				} else {
 					return this.messages.get(i);
 				}
-			}
+					}
 		}
 		return null;
 	}
 
 	public Message getLatestMessage() {
-		if ((this.messages == null) || (this.messages.size() == 0)) {
+		if (this.messages.size() == 0) {
 			Message message = new Message(this, "", Message.ENCRYPTION_NONE);
 			message.setTime(getCreated());
 			return message;
@@ -158,7 +286,7 @@ public class Conversation extends AbstractEntity {
 				if (generatedName != null) {
 					return generatedName;
 				} else {
-					return getContactJid().getLocalpart();
+					return getJid().getLocalpart();
 				}
 			}
 		} else {
@@ -166,10 +294,6 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
-	public String getProfilePhotoString() {
-		return this.getContact().getProfilePhoto();
-	}
-
 	public String getAccountUuid() {
 		return this.accountUuid;
 	}
@@ -182,11 +306,12 @@ public class Conversation extends AbstractEntity {
 		return this.account.getRoster().getContact(this.contactJid);
 	}
 
-	public void setAccount(Account account) {
+	public void setAccount(final Account account) {
 		this.account = account;
 	}
 
-	public Jid getContactJid() {
+	@Override
+	public Jid getJid() {
 		return this.contactJid;
 	}
 
@@ -213,14 +338,14 @@ public class Conversation extends AbstractEntity {
 	}
 
 	public static Conversation fromCursor(Cursor cursor) {
-        Jid jid;
-        try {
-            jid = Jid.fromString(cursor.getString(cursor.getColumnIndex(CONTACTJID)));
-        } catch (final InvalidJidException e) {
-            // Borked DB..
-            jid = null;
-        }
-        return new Conversation(cursor.getString(cursor.getColumnIndex(UUID)),
+		Jid jid;
+		try {
+			jid = Jid.fromString(cursor.getString(cursor.getColumnIndex(CONTACTJID)));
+		} 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)),
@@ -247,9 +372,9 @@ public class Conversation extends AbstractEntity {
 		if (this.otrSession != null) {
 			return this.otrSession;
 		} else {
-            final SessionID sessionId = new SessionID(this.getContactJid().toBareJid().toString(),
-                    presence,
-                    "xmpp");
+			final SessionID sessionId = new SessionID(this.getJid().toBareJid().toString(),
+					presence,
+					"xmpp");
 			this.otrSession = new SessionImpl(sessionId, getAccount().getOtrEngine());
 			try {
 				if (sendStart) {
@@ -288,7 +413,7 @@ public class Conversation extends AbstractEntity {
 			} catch (OtrException e) {
 				this.resetOtrSession();
 			}
-		}
+				}
 	}
 
 	public boolean endOtrIfNeeded() {
@@ -315,30 +440,29 @@ public class Conversation extends AbstractEntity {
 		return this.otrSession != null;
 	}
 
-	public String getOtrFingerprint() {
+	public synchronized String getOtrFingerprint() {
 		if (this.otrFingerprint == null) {
 			try {
-				if (getOtrSession() == null) {
-					return "";
+				if (getOtrSession() == null || getOtrSession().getSessionStatus() != SessionStatus.ENCRYPTED) {
+					return null;
 				}
-				DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession()
-						.getRemotePublicKey();
-				StringBuilder builder = new StringBuilder(
-						new OtrCryptoEngineImpl().getFingerprint(remotePubKey));
-				builder.insert(8, " ");
-				builder.insert(17, " ");
-				builder.insert(26, " ");
-				builder.insert(35, " ");
-				this.otrFingerprint = builder.toString();
-			} catch (final OtrCryptoException ignored) {
-
+				DSAPublicKey remotePubKey = (DSAPublicKey) getOtrSession().getRemotePublicKey();
+				this.otrFingerprint = getAccount().getOtrEngine().getFingerprint(remotePubKey);
+			} catch (final OtrCryptoException | UnsupportedOperationException ignored) {
+				return null;
 			}
 		}
 		return this.otrFingerprint;
 	}
 
-	public void verifyOtrFingerprint() {
-		getContact().addOtrFingerprint(getOtrFingerprint());
+	public boolean verifyOtrFingerprint() {
+		final String fingerprint = getOtrFingerprint();
+		if (fingerprint != null) {
+			getContact().addOtrFingerprint(fingerprint);
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public boolean isOtrFingerprintVerified() {
@@ -450,9 +574,11 @@ public class Conversation extends AbstractEntity {
 	}
 
 	public boolean hasDuplicateMessage(Message message) {
-		for (int i = this.getMessages().size() - 1; i >= 0; --i) {
-			if (this.messages.get(i).equals(message)) {
-				return true;
+		synchronized (this.messages) {
+			for (int i = this.messages.size() - 1; i >= 0; --i) {
+				if (this.messages.get(i).equals(message)) {
+					return true;
+				}
 			}
 		}
 		return false;
@@ -460,7 +586,7 @@ public class Conversation extends AbstractEntity {
 
 	public Message findSentMessageWithBody(String body) {
 		synchronized (this.messages) {
-			for (int i = this.getMessages().size() - 1; i >= 0; --i) {
+			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;
@@ -470,6 +596,31 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
+	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));
 	}
@@ -535,12 +686,32 @@ public class Conversation extends AbstractEntity {
 		}
 	}
 
+	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 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_FINISHED = 4;
+		public static final int STATUS_VERIFIED = 4;
 
 		public String secret = null;
 		public String hint = null;
diff --git a/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java b/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
index 25f33907..7c8f95d1 100644
--- a/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
+++ b/src/main/java/eu/siacs/conversations/entities/DownloadableFile.java
@@ -56,12 +56,16 @@ public class DownloadableFile extends File {
 
 	public String getMimeType() {
 		String path = this.getAbsolutePath();
-		String mime = URLConnection.guessContentTypeFromName(path);
-		if (mime != null) {
-			return mime;
-		} else if (mime == null && path.endsWith(".webp")) {
-			return "image/webp";
-		} else {
+		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 "";
 		}
 	}
diff --git a/src/main/java/eu/siacs/conversations/entities/ListItem.java b/src/main/java/eu/siacs/conversations/entities/ListItem.java
index db9fbc37..efc1c2b9 100644
--- a/src/main/java/eu/siacs/conversations/entities/ListItem.java
+++ b/src/main/java/eu/siacs/conversations/entities/ListItem.java
@@ -12,10 +12,10 @@ public interface ListItem extends Comparable<ListItem> {
 	public List<Tag> getTags();
 
 	public final class Tag {
-		private String name;
-		private int color;
+		private final String name;
+		private final int color;
 
-		public Tag(String name, int color) {
+		public Tag(final String name, final int color) {
 			this.name = name;
 			this.color = color;
 		}
@@ -28,4 +28,6 @@ public interface ListItem extends Comparable<ListItem> {
 			return this.name;
 		}
 	}
+
+	public boolean match(final String needle);
 }
diff --git a/src/main/java/eu/siacs/conversations/entities/Message.java b/src/main/java/eu/siacs/conversations/entities/Message.java
index 47861d06..b5a1897d 100644
--- a/src/main/java/eu/siacs/conversations/entities/Message.java
+++ b/src/main/java/eu/siacs/conversations/entities/Message.java
@@ -45,6 +45,7 @@ public class Message extends AbstractEntity {
 	public static String STATUS = "status";
 	public static String TYPE = "type";
 	public static String REMOTE_MSG_ID = "remoteMsgId";
+	public static String SERVER_MSG_ID = "serverMsgId";
 	public static String RELATIVE_FILE_PATH = "relativeFilePath";
 	public boolean markable = false;
 	protected String conversationUuid;
@@ -59,6 +60,7 @@ public class Message extends AbstractEntity {
 	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;
@@ -75,7 +77,7 @@ public class Message extends AbstractEntity {
 	public Message(Conversation conversation, String body, int encryption, int status) {
 		this(java.util.UUID.randomUUID().toString(),
 				conversation.getUuid(),
-				conversation.getContactJid() == null ? null : conversation.getContactJid().toBareJid(),
+				conversation.getJid() == null ? null : conversation.getJid().toBareJid(),
 				null,
 				body,
 				System.currentTimeMillis(),
@@ -83,13 +85,15 @@ public class Message extends AbstractEntity {
 				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 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;
@@ -101,6 +105,7 @@ public class Message extends AbstractEntity {
 		this.type = type;
 		this.remoteMsgId = remoteMsgId;
 		this.relativeFilePath = relativeFilePath;
+		this.serverMsgId = serverMsgId;
 	}
 
 	public static Message fromCursor(Cursor cursor) {
@@ -136,7 +141,8 @@ public class Message extends AbstractEntity {
 				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(RELATIVE_FILE_PATH)),
+				cursor.getString(cursor.getColumnIndex(SERVER_MSG_ID)));
 	}
 
 	public static Message createStatusMessage(Conversation conversation) {
@@ -168,6 +174,7 @@ public class Message extends AbstractEntity {
 		values.put(TYPE, type);
 		values.put(REMOTE_MSG_ID, remoteMsgId);
 		values.put(RELATIVE_FILE_PATH, relativeFilePath);
+		values.put(SERVER_MSG_ID,serverMsgId);
 		return values;
 	}
 
@@ -199,7 +206,7 @@ public class Message extends AbstractEntity {
 				return null;
 			} else {
 				return this.conversation.getAccount().getRoster()
-						.getContactFromRoster(this.trueCounterpart);
+					.getContactFromRoster(this.trueCounterpart);
 			}
 		}
 	}
@@ -248,6 +255,14 @@ public class Message extends AbstractEntity {
 		this.remoteMsgId = id;
 	}
 
+	public String getServerMsgId() {
+		return this.serverMsgId;
+	}
+
+	public void setServerMsgId(String id) {
+		this.serverMsgId = id;
+	}
+
 	public boolean isRead() {
 		return this.read;
 	}
@@ -293,38 +308,43 @@ public class Message extends AbstractEntity {
 	}
 
 	public boolean equals(Message message) {
-		return (this.remoteMsgId != null) && (this.body != null) && (this.counterpart != null) && this.remoteMsgId.equals(message.getRemoteMsgId()) && this.body.equals(message.getBody()) && this.counterpart.equals(message.getCounterpart());
+		if (this.serverMsgId != null && message.getServerMsgId() != null) {
+			return this.serverMsgId.equals(message.getServerMsgId());
+		} else {
+			return this.body != null
+				&& this.counterpart != null
+				&& ((this.remoteMsgId != null && this.remoteMsgId.equals(message.getRemoteMsgId()))
+						|| this.uuid.equals(message.getRemoteMsgId())) && this.body.equals(message.getBody())
+				&& this.counterpart.equals(message.getCounterpart());
+		}
 	}
 
 	public Message next() {
-		if (this.mNextMessage == null) {
-			synchronized (this.conversation.messages) {
+		synchronized (this.conversation.messages) {
+			if (this.mNextMessage == null) {
 				int index = this.conversation.messages.indexOf(this);
-				if (index < 0
-						|| index >= this.conversation.getMessages().size() - 1) {
+				if (index < 0 || index >= this.conversation.messages.size() - 1) {
 					this.mNextMessage = null;
 				} else {
-					this.mNextMessage = this.conversation.messages
-							.get(index + 1);
+					this.mNextMessage = this.conversation.messages.get(index + 1);
 				}
 			}
+			return this.mNextMessage;
 		}
-		return this.mNextMessage;
 	}
 
 	public Message prev() {
-		if (this.mPreviousMessage == null) {
-			synchronized (this.conversation.messages) {
+		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);
+					this.mPreviousMessage = this.conversation.messages.get(index - 1);
 				}
 			}
+			return this.mPreviousMessage;
 		}
-		return this.mPreviousMessage;
 	}
 
 	public boolean mergeable(final Message message) {
@@ -368,7 +388,7 @@ public class Message extends AbstractEntity {
 			if (!url.getProtocol().equalsIgnoreCase("http")
 					&& !url.getProtocol().equalsIgnoreCase("https")) {
 				return false;
-			}
+					}
 			if (url.getPath() == null) {
 				return false;
 			}
@@ -382,14 +402,14 @@ public class Message extends AbstractEntity {
 			String[] extensionParts = filename.split("\\.");
 			if (extensionParts.length == 2
 					&& Arrays.asList(Downloadable.VALID_IMAGE_EXTENSIONS).contains(
-					extensionParts[extensionParts.length - 1])) {
+						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])) {
+						extensionParts[extensionParts.length - 2])) {
 				return true;
 			} else {
 				return false;
@@ -493,6 +513,15 @@ public class Message extends AbstractEntity {
 		}
 	}
 
+	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;
diff --git a/src/main/java/eu/siacs/conversations/entities/MucOptions.java b/src/main/java/eu/siacs/conversations/entities/MucOptions.java
index c8706fc9..97a63532 100644
--- a/src/main/java/eu/siacs/conversations/entities/MucOptions.java
+++ b/src/main/java/eu/siacs/conversations/entities/MucOptions.java
@@ -80,20 +80,20 @@ public class MucOptions {
 
 		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;
-            }
+			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;
+			}
 		}
 
 		public int getAffiliation() {
@@ -164,7 +164,7 @@ public class MucOptions {
 	}
 
 	public void processPacket(PresencePacket packet, PgpEngine pgp) {
-        final Jid from = packet.getFrom();
+		final Jid from = packet.getFrom();
 		if (!from.isBareJid()) {
 			final String name = from.getResourcepart();
 			final String type = packet.getAttribute("type");
@@ -179,7 +179,7 @@ public class MucOptions {
 						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.getContactJid())) {
+						if (codes.contains(STATUS_CODE_SELF_PRESENCE) || packet.getFrom().equals(this.conversation.getJid())) {
 							this.isOnline = true;
 							this.error = ERROR_NO_ERROR;
 							self = user;
@@ -204,14 +204,14 @@ public class MucOptions {
 									msg = "";
 								}
 								user.setPgpKeyId(pgp.fetchKeyId(account, msg,
-										signed.getContent()));
+											signed.getContent()));
 							}
 						}
 					}
 				}
 			} else if (type.equals("unavailable")) {
 				if (codes.contains(STATUS_CODE_SELF_PRESENCE) ||
-						packet.getFrom().equals(this.conversation.getContactJid())) {
+						packet.getFrom().equals(this.conversation.getJid())) {
 					if (codes.contains(STATUS_CODE_CHANGED_NICK)) {
 						this.mNickChangingInProgress = true;
 					} else if (codes.contains(STATUS_CODE_KICKED)) {
@@ -282,8 +282,8 @@ public class MucOptions {
 				&& conversation.getBookmark().getNick() != null
 				&& !conversation.getBookmark().getNick().isEmpty()) {
 			return conversation.getBookmark().getNick();
-		} else if (!conversation.getContactJid().isBareJid()) {
-			return conversation.getContactJid().getResourcepart();
+		} else if (!conversation.getJid().isBareJid()) {
+			return conversation.getJid().getResourcepart();
 		} else {
 			return account.getUsername();
 		}
@@ -334,14 +334,14 @@ public class MucOptions {
 	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());
-					}
+			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));
@@ -388,12 +388,12 @@ public class MucOptions {
 	}
 
 	public Jid createJoinJid(String nick) {
-        try {
-            return Jid.fromString(this.conversation.getContactJid().toBareJid().toString() + "/"+nick);
-        } catch (final InvalidJidException e) {
-            return null;
-        }
-    }
+		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()) {
diff --git a/src/main/java/eu/siacs/conversations/entities/Roster.java b/src/main/java/eu/siacs/conversations/entities/Roster.java
index 12a89cec..1a81a419 100644
--- a/src/main/java/eu/siacs/conversations/entities/Roster.java
+++ b/src/main/java/eu/siacs/conversations/entities/Roster.java
@@ -7,7 +7,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
 public class Roster {
-	Account account;
+	final Account account;
 	final ConcurrentHashMap<String, Contact> contacts = new ConcurrentHashMap<>();
 	private String version = null;
 
@@ -19,7 +19,7 @@ public class Roster {
 		if (jid == null) {
 			return null;
 		}
-		Contact contact = contacts.get(jid.toBareJid().toString());
+		final Contact contact = contacts.get(jid.toBareJid().toString());
 		if (contact != null && contact.showInRoster()) {
 			return contact;
 		} else {
@@ -32,7 +32,7 @@ public class Roster {
 		if (contacts.containsKey(bareJid.toString())) {
 			return contacts.get(bareJid.toString());
 		} else {
-			Contact contact = new Contact(bareJid);
+			final Contact contact = new Contact(bareJid);
 			contact.setAccount(account);
 			contacts.put(bareJid.toString(), contact);
 			return contact;
@@ -46,13 +46,13 @@ public class Roster {
 	}
 
 	public void markAllAsNotInRoster() {
-		for (Contact contact : getContacts()) {
+		for (final Contact contact : getContacts()) {
 			contact.resetOption(Contact.Options.IN_ROSTER);
 		}
 	}
 
 	public void clearSystemAccounts() {
-		for (Contact contact : getContacts()) {
+		for (final Contact contact : getContacts()) {
 			contact.setPhotoUri(null);
 			contact.setSystemName(null);
 			contact.setSystemAccount(null);
diff --git a/src/main/java/eu/siacs/conversations/generator/AbstractGenerator.java b/src/main/java/eu/siacs/conversations/generator/AbstractGenerator.java
index f46e7ba4..870ee757 100644
--- a/src/main/java/eu/siacs/conversations/generator/AbstractGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/AbstractGenerator.java
@@ -4,9 +4,12 @@ import android.util.Base64;
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.text.SimpleDateFormat;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
+import java.util.TimeZone;
 
 import eu.siacs.conversations.services.XmppConnectionService;
 
@@ -20,9 +23,11 @@ public abstract class AbstractGenerator {
 			"http://jabber.org/protocol/disco#info",
 			"urn:xmpp:avatar:metadata+notify",
 			"urn:xmpp:ping"};
-	public final String IDENTITY_NAME = "Conversations 0.9.3";
+	public final String IDENTITY_NAME = "Conversations 0.10";
 	public final String IDENTITY_TYPE = "phone";
 
+	private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
+
 	protected XmppConnectionService mXmppConnectionService;
 
 	protected AbstractGenerator(XmppConnectionService service) {
@@ -46,4 +51,9 @@ public abstract class AbstractGenerator {
 		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);
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
index 5d674748..f94dc5d7 100644
--- a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
@@ -4,52 +4,56 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.services.MessageArchiveService;
 import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.forms.Data;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import eu.siacs.conversations.xmpp.pep.Avatar;
 import eu.siacs.conversations.xmpp.stanzas.IqPacket;
 
 public class IqGenerator extends AbstractGenerator {
 
-	public IqGenerator(XmppConnectionService service) {
+	public IqGenerator(final XmppConnectionService service) {
 		super(service);
 	}
 
-	public IqPacket discoResponse(IqPacket request) {
-		IqPacket packet = new IqPacket(IqPacket.TYPE_RESULT);
+	public IqPacket discoResponse(final IqPacket request) {
+		final IqPacket packet = new IqPacket(IqPacket.TYPE_RESULT);
 		packet.setId(request.getId());
-        packet.setTo(request.getFrom());
-		Element query = packet.addChild("query",
+		packet.setTo(request.getFrom());
+		final Element query = packet.addChild("query",
 				"http://jabber.org/protocol/disco#info");
 		query.setAttribute("node", request.query().getAttribute("node"));
-		Element identity = query.addChild("identity");
+		final Element identity = query.addChild("identity");
 		identity.setAttribute("category", "client");
 		identity.setAttribute("type", this.IDENTITY_TYPE);
 		identity.setAttribute("name", IDENTITY_NAME);
-		List<String> features = Arrays.asList(FEATURES);
+		final List<String> features = Arrays.asList(FEATURES);
 		Collections.sort(features);
-		for (String feature : features) {
+		for (final String feature : features) {
 			query.addChild("feature").setAttribute("var", feature);
 		}
 		return packet;
 	}
 
-	protected IqPacket publish(String node, Element item) {
-		IqPacket packet = new IqPacket(IqPacket.TYPE_SET);
-		Element pubsub = packet.addChild("pubsub",
+	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");
-		Element publish = pubsub.addChild("publish");
+		final Element publish = pubsub.addChild("publish");
 		publish.setAttribute("node", node);
 		publish.addChild(item);
 		return packet;
 	}
 
 	protected IqPacket retrieve(String node, Element item) {
-		IqPacket packet = new IqPacket(IqPacket.TYPE_GET);
-		Element pubsub = packet.addChild("pubsub",
+		final IqPacket packet = new IqPacket(IqPacket.TYPE_GET);
+		final Element pubsub = packet.addChild("pubsub",
 				"http://jabber.org/protocol/pubsub");
-		Element items = pubsub.addChild("items");
+		final Element items = pubsub.addChild("items");
 		items.setAttribute("node", node);
 		if (item != null) {
 			items.addChild(item);
@@ -58,19 +62,19 @@ public class IqGenerator extends AbstractGenerator {
 	}
 
 	public IqPacket publishAvatar(Avatar avatar) {
-		Element item = new Element("item");
+		final Element item = new Element("item");
 		item.setAttribute("id", avatar.sha1sum);
-		Element data = item.addChild("data", "urn:xmpp:avatar:data");
+		final Element data = item.addChild("data", "urn:xmpp:avatar:data");
 		data.setContent(avatar.image);
 		return publish("urn:xmpp:avatar:data", item);
 	}
 
-	public IqPacket publishAvatarMetadata(Avatar avatar) {
-		Element item = new Element("item");
+	public IqPacket publishAvatarMetadata(final Avatar avatar) {
+		final Element item = new Element("item");
 		item.setAttribute("id", avatar.sha1sum);
-		Element metadata = item
-				.addChild("metadata", "urn:xmpp:avatar:metadata");
-		Element info = metadata.addChild("info");
+		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);
@@ -79,10 +83,10 @@ public class IqGenerator extends AbstractGenerator {
 		return publish("urn:xmpp:avatar:metadata", item);
 	}
 
-	public IqPacket retrieveAvatar(Avatar avatar) {
-		Element item = new Element("item");
+	public IqPacket retrieveAvatar(final Avatar avatar) {
+		final Element item = new Element("item");
 		item.setAttribute("id", avatar.sha1sum);
-		IqPacket packet = retrieve("urn:xmpp:avatar:data", item);
+		final IqPacket packet = retrieve("urn:xmpp:avatar:data", item);
 		packet.setTo(avatar.owner);
 		return packet;
 	}
@@ -94,4 +98,54 @@ public class IqGenerator extends AbstractGenerator {
 		}
 		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.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;
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java b/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
index ca5417e0..8e99888b 100644
--- a/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/MessageGenerator.java
@@ -114,7 +114,7 @@ public class MessageGenerator extends AbstractGenerator {
 	private MessagePacket generateError(MessagePacket origin) {
 		MessagePacket packet = new MessagePacket();
 		packet.setId(origin.getId());
-        packet.setTo(origin.getFrom());
+		packet.setTo(origin.getFrom());
 		packet.setBody(origin.getBody());
 		packet.setType(MessagePacket.TYPE_ERROR);
 		return packet;
@@ -135,7 +135,7 @@ public class MessageGenerator extends AbstractGenerator {
 			String subject) {
 		MessagePacket packet = new MessagePacket();
 		packet.setType(MessagePacket.TYPE_GROUPCHAT);
-		packet.setTo(conversation.getContactJid().toBareJid());
+		packet.setTo(conversation.getJid().toBareJid());
 		Element subjectChild = new Element("subject");
 		subjectChild.setContent(subject);
 		packet.addChild(subjectChild);
@@ -149,13 +149,13 @@ public class MessageGenerator extends AbstractGenerator {
 		packet.setTo(contact);
 		packet.setFrom(conversation.getAccount().getJid());
 		Element x = packet.addChild("x", "jabber:x:conference");
-		x.setAttribute("jid", conversation.getContactJid().toBareJid().toString());
+		x.setAttribute("jid", conversation.getJid().toBareJid().toString());
 		return packet;
 	}
 
 	public MessagePacket invite(Conversation conversation, Jid contact) {
 		MessagePacket packet = new MessagePacket();
-		packet.setTo(conversation.getContactJid().toBareJid());
+		packet.setTo(conversation.getJid().toBareJid());
 		packet.setFrom(conversation.getAccount().getJid());
 		Element x = new Element("x");
 		x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
@@ -170,7 +170,7 @@ public class MessageGenerator extends AbstractGenerator {
 			MessagePacket originalMessage, String namespace) {
 		MessagePacket receivedPacket = new MessagePacket();
 		receivedPacket.setType(MessagePacket.TYPE_NORMAL);
-        receivedPacket.setTo(originalMessage.getFrom());
+		receivedPacket.setTo(originalMessage.getFrom());
 		receivedPacket.setFrom(account.getJid());
 		Element received = receivedPacket.addChild("received", namespace);
 		received.setAttribute("id", originalMessage.getId());
diff --git a/src/main/java/eu/siacs/conversations/parser/AbstractParser.java b/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
index eedfca16..08070c08 100644
--- a/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/AbstractParser.java
@@ -2,8 +2,6 @@ package eu.siacs.conversations.parser;
 
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.Date;
 import java.util.Locale;
 
@@ -11,7 +9,6 @@ import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xml.Element;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
 public abstract class AbstractParser {
@@ -24,54 +21,39 @@ public abstract class AbstractParser {
 
 	protected long getTimestamp(Element packet) {
 		long now = System.currentTimeMillis();
-		ArrayList<String> stamps = new ArrayList<>();
-		for (Element child : packet.getChildren()) {
-			if (child.getName().equals("delay")) {
-				stamps.add(child.getAttribute("stamp").replace("Z", "+0000"));
-			}
+		Element delay = packet.findChild("delay");
+		if (delay == null) {
+			return now;
 		}
-		Collections.sort(stamps);
-		if (stamps.size() >= 1) {
-			try {
-				String stamp = stamps.get(stamps.size() - 1);
-				if (stamp.contains(".")) {
-					Date date = new SimpleDateFormat(
-							"yyyy-MM-dd'T'HH:mm:ss.SSSZ", Locale.US)
-							.parse(stamp);
-					if (now < date.getTime()) {
-						return now;
-					} else {
-						return date.getTime();
-					}
-				} else {
-					Date date = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ",
-							Locale.US).parse(stamp);
-					if (now < date.getTime()) {
-						return now;
-					} else {
-						return date.getTime();
-					}
-				}
-			} catch (ParseException e) {
-				return now;
-			}
-		} else {
+		String stamp = delay.getAttribute("stamp");
+		if (stamp == null) {
+			return now;
+		}
+		try {
+			long time = parseTimestamp(stamp).getTime();
+			return now < time ? now : time;
+		} catch (ParseException e) {
 			return now;
 		}
 	}
 
+	public static Date parseTimestamp(String timestamp) throws ParseException {
+		timestamp = timestamp.replace("Z", "+0000");
+		SimpleDateFormat dateFormat;
+		if (timestamp.contains(".")) {
+			dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ", Locale.US);
+		} else {
+			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) {
-        Jid from;
-        try {
-            from = Jid.fromString(packet.getAttribute("from")).toBareJid();
-        } catch (final InvalidJidException e) {
-            // TODO: Handle this?
-            from = null;
-        }
-        String presence = from == null || from.isBareJid() ? "" : from.getResourcepart();
-		Contact contact = account.getRoster().getContact(from);
-		long timestamp = getTimestamp(packet);
+		final Jid from = packet.getAttributeAsJid("from");
+		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) {
diff --git a/src/main/java/eu/siacs/conversations/parser/IqParser.java b/src/main/java/eu/siacs/conversations/parser/IqParser.java
index aeec56d0..e84545fc 100644
--- a/src/main/java/eu/siacs/conversations/parser/IqParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/IqParser.java
@@ -2,36 +2,40 @@ package eu.siacs.conversations.parser;
 
 import android.util.Log;
 
+import java.util.ArrayList;
+import java.util.Collection;
+
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnIqPacketReceived;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import eu.siacs.conversations.xmpp.stanzas.IqPacket;
 
 public class IqParser extends AbstractParser implements OnIqPacketReceived {
 
-	public IqParser(XmppConnectionService service) {
+	public IqParser(final XmppConnectionService service) {
 		super(service);
 	}
 
-	public void rosterItems(Account account, Element query) {
-		String version = query.getAttribute("ver");
+	private void rosterItems(final Account account, final Element query) {
+		final String version = query.getAttribute("ver");
 		if (version != null) {
 			account.getRoster().setVersion(version);
 		}
-		for (Element item : query.getChildren()) {
+		for (final Element item : query.getChildren()) {
 			if (item.getName().equals("item")) {
 				final Jid jid = item.getAttributeAsJid("jid");
 				if (jid == null) {
-					break;
+					continue;
 				}
-				String name = item.getAttribute("name");
-				String subscription = item.getAttribute("subscription");
-				Contact contact = account.getRoster().getContact(jid);
+				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);
@@ -54,53 +58,104 @@ public class IqParser extends AbstractParser implements OnIqPacketReceived {
 		mXmppConnectionService.updateRosterUi();
 	}
 
-	public String avatarData(IqPacket packet) {
-		Element pubsub = packet.findChild("pubsub",
+	public String avatarData(final IqPacket packet) {
+		final Element pubsub = packet.findChild("pubsub",
 				"http://jabber.org/protocol/pubsub");
 		if (pubsub == null) {
 			return null;
 		}
-		Element items = pubsub.findChild("items");
+		final Element items = pubsub.findChild("items");
 		if (items == null) {
 			return null;
 		}
 		return super.avatarData(items);
 	}
 
+	public static boolean fromServer(final Account account, final IqPacket packet) {
+		return packet.getFrom() == null
+				|| packet.getFrom().equals(account.getServer())
+				|| packet.getFrom().equals(account.getJid().toBareJid())
+				|| packet.getFrom().equals(account.getJid());
+	}
+
 	@Override
-	public void onIqPacketReceived(Account account, IqPacket packet) {
-		if (packet.hasChild("query", "jabber:iq:roster")) {
-			final Jid from = packet.getFrom();
-			if ((from == null) || (from.equals(account.getJid().toBareJid()))) {
-				Element query = packet.findChild("query");
-				this.rosterItems(account, query);
+	public void onIqPacketReceived(final Account account, final IqPacket packet) {
+		if (packet.hasChild("query", Xmlns.ROSTER) && fromServer(account, packet)) {
+			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();
 			}
-		} else {
-			if (packet.getFrom() == null) {
-				Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": received iq with invalid from "+packet.toString());
-				return;
-			} 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")) {
-				IqPacket response = mXmppConnectionService.getIqGenerator()
-						.discoResponse(packet);
-				account.getXmppConnection().sendIqPacket(response, null);
-			} else if (packet.hasChild("ping", "urn:xmpp:ping")) {
-				IqPacket response = packet.generateRespone(IqPacket.TYPE_RESULT);
-				mXmppConnectionService.sendIqPacket(account, response, null);
+			this.rosterItems(account, query);
+		} else if ((packet.hasChild("block", Xmlns.BLOCKING) || packet.hasChild("blocklist", Xmlns.BLOCKING)) &&
+				fromServer(account, packet)) {
+			// 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();
+			}
+			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) &&
+				fromServer(account, packet) && 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 {
-				if ((packet.getType() == IqPacket.TYPE_GET)
-						|| (packet.getType() == IqPacket.TYPE_SET)) {
-					IqPacket response = packet.generateRespone(IqPacket.TYPE_ERROR);
-					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);
+				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);
+			account.getXmppConnection().sendIqPacket(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/eu/siacs/conversations/parser/MessageParser.java b/src/main/java/eu/siacs/conversations/parser/MessageParser.java
index 782675da..44cda261 100644
--- a/src/main/java/eu/siacs/conversations/parser/MessageParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/MessageParser.java
@@ -10,11 +10,11 @@ import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.MessageArchiveService;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import eu.siacs.conversations.xmpp.pep.Avatar;
 import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
@@ -60,12 +60,12 @@ public class MessageParser extends AbstractParser implements
 	}
 
 	private Message parseOtrChat(MessagePacket packet, Account account) {
-		boolean properlyAddressed = (!packet.getTo().isBareJid())
-				|| (account.countPresences() == 1);
-        final Jid from = packet.getFrom();
-		if (from == null) {
+		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;
@@ -124,10 +124,6 @@ public class MessageParser extends AbstractParser implements
 			finishedMessage.setCounterpart(from);
 			return finishedMessage;
 		} catch (Exception e) {
-			String receivedId = packet.getId();
-			if (receivedId != null) {
-				mXmppConnectionService.replyWithNotAcceptable(account, packet);
-			}
 			conversation.resetOtrSession();
 			return null;
 		}
@@ -230,7 +226,7 @@ public class MessageParser extends AbstractParser implements
 							mXmppConnectionService.getConversations(), account,
 							to.toBareJid());
 					if (conversation != null) {
-						mXmppConnectionService.markRead(conversation, false);
+						mXmppConnectionService.markRead(conversation);
 					}
 				}
 			}
@@ -277,6 +273,69 @@ public class MessageParser extends AbstractParser implements
 		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(),
@@ -444,12 +503,22 @@ public class MessageParser extends AbstractParser implements
 				if (message != null) {
 					if (message.getStatus() == Message.STATUS_SEND) {
 						account.activateGracePeriod();
-						mXmppConnectionService.markRead(
-								message.getConversation(), false);
+						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);
 			}
@@ -459,8 +528,7 @@ public class MessageParser extends AbstractParser implements
 				if (message.getStatus() == Message.STATUS_RECEIVED) {
 					message.markUnread();
 				} else {
-					mXmppConnectionService.markRead(message.getConversation(),
-							false);
+					mXmppConnectionService.markRead(message.getConversation());
 					account.activateGracePeriod();
 				}
 			}
@@ -491,12 +559,16 @@ public class MessageParser extends AbstractParser implements
 		}
 		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())) {
-			Log.d(Config.LOGTAG, "ending because of reasons");
 			conversation.endOtrIfNeeded();
 		}
 
@@ -509,7 +581,7 @@ public class MessageParser extends AbstractParser implements
 		if (message.trusted() && message.bodyContainsDownloadable()) {
 			this.mXmppConnectionService.getHttpConnectionManager()
 					.createNewConnection(message);
-		} else {
+		} else if (!message.isRead()) {
 			mXmppConnectionService.getNotificationService().push(message);
 		}
 		mXmppConnectionService.updateConversationUi();
diff --git a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
index 43c8fa8d..accb56ea 100644
--- a/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/PresenceParser.java
@@ -45,69 +45,56 @@ public class PresenceParser extends AbstractParser implements
 		}
 		final Jid from = packet.getFrom();
 		String type = packet.getAttribute("type");
-		if (from.toBareJid().equals(account.getJid().toBareJid())) {
+		Contact contact = account.getRoster().getContact(packet.getFrom());
+		if (type == null) {
+			String presence;
 			if (!from.isBareJid()) {
-				if (type == null) {
-					account.updatePresence(from.getResourcepart(),
-							Presences.parseShow(packet.findChild("show")));
-				} else if (type.equals("unavailable")) {
-					account.removePresence(from.getResourcepart());
-					account.deactivateGracePeriod();
-				}
+				presence = from.getResourcepart();
+			} else {
+				presence = "";
 			}
-		} else {
-			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()));
+			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, true);
-				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());
+			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();
 	}
 
diff --git a/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java b/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
index 55fcff2e..5fa61491 100644
--- a/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
+++ b/src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
@@ -22,7 +22,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 	private static DatabaseBackend instance = null;
 
 	private static final String DATABASE_NAME = "history";
-	private static final int DATABASE_VERSION = 11;
+	private static final int DATABASE_VERSION = 13;
 
 	private static String CREATE_CONTATCS_STATEMENT = "create table "
 			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
@@ -65,6 +65,7 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 				+ 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
@@ -121,6 +122,14 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 			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) {
@@ -223,9 +232,9 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		return conversation;
 	}
 
-	public void updateConversation(Conversation conversation) {
-		SQLiteDatabase db = this.getWritableDatabase();
-		String[] args = { conversation.getUuid() };
+	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);
 	}
diff --git a/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
new file mode 100644
index 00000000..82111243
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/services/MessageArchiveService.java
@@ -0,0 +1,366 @@
+package eu.siacs.conversations.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 eu.siacs.conversations.Config;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.generator.AbstractGenerator;
+import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.OnAdvancedStreamFeaturesLoaded;
+import eu.siacs.conversations.xmpp.OnIqPacketReceived;
+import eu.siacs.conversations.xmpp.jid.Jid;
+import eu.siacs.conversations.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 Jid with = null;
+		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;
+			this.with = conversation.getJid().toBareJid();
+		}
+
+		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.with = with;
+			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 with;
+		}
+
+		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();
+			builder.append("with=");
+			if (this.with==null) {
+				builder.append("*");
+			} else {
+				builder.append(with.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/eu/siacs/conversations/services/NotificationService.java b/src/main/java/eu/siacs/conversations/services/NotificationService.java
index f649f9d4..a30cf2f1 100644
--- a/src/main/java/eu/siacs/conversations/services/NotificationService.java
+++ b/src/main/java/eu/siacs/conversations/services/NotificationService.java
@@ -16,9 +16,11 @@ import android.support.v4.app.NotificationCompat.Builder;
 import android.support.v4.app.TaskStackBuilder;
 import android.text.Html;
 import android.util.DisplayMetrics;
+import android.util.Log;
 
 import java.io.FileNotFoundException;
 import java.util.ArrayList;
+import java.util.Calendar;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.regex.Matcher;
@@ -33,16 +35,17 @@ import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.ui.ConversationActivity;
 import eu.siacs.conversations.ui.ManageAccountActivity;
+import eu.siacs.conversations.ui.TimePreference;
 
 public class NotificationService {
 
 	private XmppConnectionService mXmppConnectionService;
 
-	private LinkedHashMap<String, ArrayList<Message>> notifications = new LinkedHashMap<String, ArrayList<Message>>();
+	private final LinkedHashMap<String, ArrayList<Message>> notifications = new LinkedHashMap<>();
 
-	public static int NOTIFICATION_ID = 0x2342;
-	public static int FOREGROUND_NOTIFICATION_ID = 0x8899;
-	public static int ERROR_NOTIFICATION_ID = 0x5678;
+	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;
@@ -52,46 +55,61 @@ public class NotificationService {
 		this.mXmppConnectionService = service;
 	}
 
-	public boolean notify(Message message) {
+	public boolean notify(final Message message) {
 		return (message.getStatus() == Message.STATUS_RECEIVED)
-				&& notificationsEnabled()
-				&& !message.getConversation().isMuted()
-				&& (message.getConversation().getMode() == Conversation.MODE_SINGLE
+			&& notificationsEnabled()
+			&& !message.getConversation().isMuted()
+			&& (message.getConversation().getMode() == Conversation.MODE_SINGLE
 					|| conferenceNotificationsEnabled()
 					|| wasHighlightedOrPrivate(message)
-					);
+				 );
 	}
 
 	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);
 	}
 
-	public void push(Message message) {
+	public void push(final Message message) {
 		if (!notify(message)) {
 			return;
 		}
-		PowerManager pm = (PowerManager) mXmppConnectionService
-				.getSystemService(Context.POWER_SERVICE);
-		boolean isScreenOn = pm.isScreenOn();
+		final PowerManager pm = (PowerManager) mXmppConnectionService
+			.getSystemService(Context.POWER_SERVICE);
+		final boolean isScreenOn = pm.isScreenOn();
 
 		if (this.mIsInForeground && isScreenOn
 				&& this.mOpenConversation == message.getConversation()) {
 			return;
-		}
+				}
 		synchronized (notifications) {
-			String conversationUuid = message.getConversationUuid();
+			final String conversationUuid = message.getConversationUuid();
 			if (notifications.containsKey(conversationUuid)) {
 				notifications.get(conversationUuid).add(message);
 			} else {
-				ArrayList<Message> mList = new ArrayList<Message>();
+				final ArrayList<Message> mList = new ArrayList<>();
 				mList.add(message);
 				notifications.put(conversationUuid, mList);
 			}
-			Account account = message.getConversation().getAccount();
+			final Account account = message.getConversation().getAccount();
 			updateNotification((!(this.mIsInForeground && this.mOpenConversation == null) || !isScreenOn)
 					&& !account.inGracePeriod()
 					&& !this.inMiniGracePeriod(account));
@@ -106,21 +124,20 @@ public class NotificationService {
 		}
 	}
 
-	public void clear(Conversation conversation) {
+	public void clear(final Conversation conversation) {
 		synchronized (notifications) {
 			notifications.remove(conversation.getUuid());
 			updateNotification(false);
 		}
 	}
 
-	private void updateNotification(boolean notify) {
-		NotificationManager notificationManager = (NotificationManager) mXmppConnectionService
-				.getSystemService(Context.NOTIFICATION_SERVICE);
-		SharedPreferences preferences = mXmppConnectionService.getPreferences();
+	private void updateNotification(final boolean notify) {
+		final NotificationManager notificationManager = (NotificationManager) mXmppConnectionService
+			.getSystemService(Context.NOTIFICATION_SERVICE);
+		final SharedPreferences preferences = mXmppConnectionService.getPreferences();
 
-		String ringtone = preferences.getString("notification_ringtone", null);
-		boolean vibrate = preferences.getBoolean("vibrate_on_notification",
-				true);
+		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);
@@ -128,16 +145,16 @@ public class NotificationService {
 			if (notify) {
 				this.markLastNotification();
 			}
-			Builder mBuilder;
+			final Builder mBuilder;
 			if (notifications.size() == 1) {
 				mBuilder = buildSingleConversations(notify);
 			} else {
 				mBuilder = buildMultipleConversation();
 			}
-			if (notify) {
+			if (notify && !isQuietHours()) {
 				if (vibrate) {
-					int dat = 70;
-					long[] pattern = {0, 3 * dat, dat, dat};
+					final int dat = 70;
+					final long[] pattern = {0, 3 * dat, dat, dat};
 					mBuilder.setVibrate(pattern);
 				}
 				if (ringtone != null) {
@@ -147,27 +164,27 @@ public class NotificationService {
 			mBuilder.setSmallIcon(R.drawable.ic_notification);
 			mBuilder.setDeleteIntent(createDeleteIntent());
 			mBuilder.setLights(0xffffffff, 2000, 4000);
-			Notification notification = mBuilder.build();
+			final Notification notification = mBuilder.build();
 			notificationManager.notify(NOTIFICATION_ID, notification);
 		}
 	}
 
 	private Builder buildMultipleConversation() {
-		Builder mBuilder = new NotificationCompat.Builder(
+		final Builder mBuilder = new NotificationCompat.Builder(
 				mXmppConnectionService);
 		NotificationCompat.InboxStyle style = new NotificationCompat.InboxStyle();
 		style.setBigContentTitle(notifications.size()
 				+ " "
 				+ mXmppConnectionService
 				.getString(R.string.unread_conversations));
-		StringBuilder names = new StringBuilder();
+		final StringBuilder names = new StringBuilder();
 		Conversation conversation = null;
 		for (ArrayList<Message> messages : notifications.values()) {
 			if (messages.size() > 0) {
 				conversation = messages.get(0).getConversation();
 				String name = conversation.getName();
 				style.addLine(Html.fromHtml("<b>" + name + "</b> "
-						+ getReadableBody(messages.get(0))));
+							+ getReadableBody(messages.get(0))));
 				names.append(name);
 				names.append(", ");
 			}
@@ -183,46 +200,45 @@ public class NotificationService {
 		mBuilder.setStyle(style);
 		if (conversation != null) {
 			mBuilder.setContentIntent(createContentIntent(conversation
-					.getUuid()));
+						.getUuid()));
 		}
 		return mBuilder;
 	}
 
-	private Builder buildSingleConversations(boolean notify) {
-		Builder mBuilder = new NotificationCompat.Builder(
+	private Builder buildSingleConversations(final boolean notify) {
+		final Builder mBuilder = new NotificationCompat.Builder(
 				mXmppConnectionService);
-		ArrayList<Message> messages = notifications.values().iterator().next();
+		final ArrayList<Message> messages = notifications.values().iterator().next();
 		if (messages.size() >= 1) {
-			Conversation conversation = messages.get(0).getConversation();
+			final Conversation conversation = messages.get(0).getConversation();
 			mBuilder.setLargeIcon(mXmppConnectionService.getAvatarService()
 					.get(conversation, getPixel(64)));
 			mBuilder.setContentTitle(conversation.getName());
-			Message message;
+			final Message message;
 			if ((message = getImage(messages)) != null) {
 				modifyForImage(mBuilder, message, messages, notify);
 			} else {
 				modifyForTextOnly(mBuilder, messages, notify);
 			}
 			mBuilder.setContentIntent(createContentIntent(conversation
-					.getUuid()));
+						.getUuid()));
 		}
 		return mBuilder;
-
 	}
 
-	private void modifyForImage(Builder builder, Message message,
-								ArrayList<Message> messages, boolean notify) {
+	private void modifyForImage(final Builder builder, final Message message,
+			final ArrayList<Message> messages, final boolean notify) {
 		try {
-			Bitmap bitmap = mXmppConnectionService.getFileBackend()
-					.getThumbnail(message, getPixel(288), false);
-			ArrayList<Message> tmp = new ArrayList<Message>();
-			for (Message msg : messages) {
+			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);
-				}
+						}
 			}
-			BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
+			final BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
 			bigPictureStyle.bigPicture(bitmap);
 			if (tmp.size() > 0) {
 				bigPictureStyle.setSummaryText(getMergedBodies(tmp));
@@ -231,13 +247,13 @@ public class NotificationService {
 				builder.setContentText(mXmppConnectionService.getString(R.string.image_file));
 			}
 			builder.setStyle(bigPictureStyle);
-		} catch (FileNotFoundException e) {
+		} catch (final FileNotFoundException e) {
 			modifyForTextOnly(builder, messages, notify);
 		}
 	}
 
-	private void modifyForTextOnly(Builder builder,
-								   ArrayList<Message> messages, boolean notify) {
+	private void modifyForTextOnly(final Builder builder,
+			final ArrayList<Message> messages, final boolean notify) {
 		builder.setStyle(new NotificationCompat.BigTextStyle()
 				.bigText(getMergedBodies(messages)));
 		builder.setContentText(getReadableBody(messages.get(0)));
@@ -246,19 +262,19 @@ public class NotificationService {
 		}
 	}
 
-	private Message getImage(ArrayList<Message> messages) {
-		for (Message message : messages) {
+	private Message getImage(final ArrayList<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 String getMergedBodies(ArrayList<Message> messages) {
-		StringBuilder text = new StringBuilder();
+	private String getMergedBodies(final ArrayList<Message> messages) {
+		final StringBuilder text = new StringBuilder();
 		for (int i = 0; i < messages.size(); ++i) {
 			text.append(getReadableBody(messages.get(i)));
 			if (i != messages.size() - 1) {
@@ -268,10 +284,10 @@ public class NotificationService {
 		return text.toString();
 	}
 
-	private String getReadableBody(Message message) {
+	private String getReadableBody(final Message message) {
 		if (message.getDownloadable() != null
 				&& (message.getDownloadable().getStatus() == Downloadable.STATUS_OFFER || message
-				.getDownloadable().getStatus() == Downloadable.STATUS_OFFER_CHECK_FILESIZE)) {
+					.getDownloadable().getStatus() == Downloadable.STATUS_OFFER_CHECK_FILESIZE)) {
 			if (message.getType() == Message.TYPE_FILE) {
 				return mXmppConnectionService.getString(R.string.file_offered_for_download);
 			} else {
@@ -283,27 +299,27 @@ public class NotificationService {
 					R.string.encrypted_message_received).toString();
 		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 			return mXmppConnectionService.getText(R.string.decryption_failed)
-					.toString();
+				.toString();
 		} else if (message.getType() == Message.TYPE_FILE) {
 			DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
 			return mXmppConnectionService.getString(R.string.file,file.getMimeType());
 		} else if (message.getType() == Message.TYPE_IMAGE) {
 			return mXmppConnectionService.getText(R.string.image_file)
-					.toString();
+				.toString();
 		} else {
 			return message.getBody().trim();
 		}
 	}
 
-	private PendingIntent createContentIntent(String conversationUuid) {
-		TaskStackBuilder stackBuilder = TaskStackBuilder
-				.create(mXmppConnectionService);
+	private PendingIntent createContentIntent(final String conversationUuid) {
+		final TaskStackBuilder stackBuilder = TaskStackBuilder
+			.create(mXmppConnectionService);
 		stackBuilder.addParentStack(ConversationActivity.class);
 
-		Intent viewConversationIntent = new Intent(mXmppConnectionService,
+		final Intent viewConversationIntent = new Intent(mXmppConnectionService,
 				ConversationActivity.class);
 		viewConversationIntent.setAction(Intent.ACTION_VIEW);
-		if (conversationUuid!=null) {
+		if (conversationUuid != null) {
 			viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
 					conversationUuid);
 			viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
@@ -311,36 +327,34 @@ public class NotificationService {
 
 		stackBuilder.addNextIntent(viewConversationIntent);
 
-		PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
-				PendingIntent.FLAG_UPDATE_CURRENT);
-		return resultPendingIntent;
+		return stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
 	}
 
 	private PendingIntent createDeleteIntent() {
-		Intent intent = new Intent(mXmppConnectionService,
+		final Intent intent = new Intent(mXmppConnectionService,
 				XmppConnectionService.class);
 		intent.setAction(XmppConnectionService.ACTION_CLEAR_NOTIFICATION);
 		return PendingIntent.getService(mXmppConnectionService, 0, intent, 0);
 	}
 
 	private PendingIntent createDisableForeground() {
-		Intent intent = new Intent(mXmppConnectionService,
+		final Intent intent = new Intent(mXmppConnectionService,
 				XmppConnectionService.class);
 		intent.setAction(XmppConnectionService.ACTION_DISABLE_FOREGROUND);
 		return PendingIntent.getService(mXmppConnectionService, 0, intent, 0);
 	}
 
-	private boolean wasHighlightedOrPrivate(Message message) {
-		String nick = message.getConversation().getMucOptions().getActualNick();
-		Pattern highlight = generateNickHighlightPattern(nick);
+	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;
 		}
-		Matcher m = highlight.matcher(message.getBody());
+		final Matcher m = highlight.matcher(message.getBody());
 		return (m.find() || message.getType() == Message.TYPE_PRIVATE);
 	}
 
-	private static Pattern generateNickHighlightPattern(String nick) {
+	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
@@ -350,17 +364,20 @@ public class NotificationService {
 				Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE);
 	}
 
-	public void setOpenConversation(Conversation conversation) {
+	public void setOpenConversation(final Conversation conversation) {
 		this.mOpenConversation = conversation;
 	}
 
-	public void setIsInForeground(boolean foreground) {
+	public void setIsInForeground(final boolean foreground) {
+		if (foreground != this.mIsInForeground) {
+			Log.d(Config.LOGTAG,"setIsInForeground("+Boolean.toString(foreground)+")");
+		}
 		this.mIsInForeground = foreground;
 	}
 
-	private int getPixel(int dp) {
-		DisplayMetrics metrics = mXmppConnectionService.getResources()
-				.getDisplayMetrics();
+	private int getPixel(final int dp) {
+		final DisplayMetrics metrics = mXmppConnectionService.getResources()
+			.getDisplayMetrics();
 		return ((int) (dp * metrics.density));
 	}
 
@@ -368,14 +385,14 @@ public class NotificationService {
 		this.mLastNotification = SystemClock.elapsedRealtime();
 	}
 
-	private boolean inMiniGracePeriod(Account account) {
-		int miniGrace = account.getStatus() == Account.State.ONLINE ? Config.MINI_GRACE_PERIOD
-				: Config.MINI_GRACE_PERIOD * 2;
+	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() {
-		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
+		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
 		mBuilder.setSmallIcon(R.drawable.ic_stat_communication_import_export);
 		mBuilder.setContentTitle(mXmppConnectionService.getString(R.string.conversations_foreground_service));
 		mBuilder.setContentText(mXmppConnectionService.getString(R.string.touch_to_disable));
@@ -386,14 +403,14 @@ public class NotificationService {
 	}
 
 	public void updateErrorNotification() {
-		NotificationManager mNotificationManager = (NotificationManager) mXmppConnectionService.getSystemService(Context.NOTIFICATION_SERVICE);
-		List<Account> errors = new ArrayList<>();
-		for (Account account : mXmppConnectionService.getAccounts()) {
+		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);
 			}
 		}
-		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
+		final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mXmppConnectionService);
 		if (errors.size() == 0) {
 			mNotificationManager.cancel(ERROR_NOTIFICATION_ID);
 			return;
@@ -410,13 +427,12 @@ public class NotificationService {
 		TaskStackBuilder stackBuilder = TaskStackBuilder.create(mXmppConnectionService);
 		stackBuilder.addParentStack(ConversationActivity.class);
 
-		Intent manageAccountsIntent = new Intent(mXmppConnectionService,ManageAccountActivity.class);
+		final Intent manageAccountsIntent = new Intent(mXmppConnectionService,ManageAccountActivity.class);
 		stackBuilder.addNextIntent(manageAccountsIntent);
 
-		PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
+		final PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
 
 		mBuilder.setContentIntent(resultPendingIntent);
-		Notification notification = mBuilder.build();
-		mNotificationManager.notify(ERROR_NOTIFICATION_ID, notification);
+		mNotificationManager.notify(ERROR_NOTIFICATION_ID, mBuilder.build());
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
index 41a40224..6bdc55a1 100644
--- a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
+++ b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
@@ -32,20 +32,16 @@ import net.java.otr4j.session.SessionStatus;
 import org.openintents.openpgp.util.OpenPgpApi;
 import org.openintents.openpgp.util.OpenPgpServiceConnection;
 
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.OutputStream;
 import java.math.BigInteger;
 import java.security.SecureRandom;
-import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
-import java.util.Date;
 import java.util.Hashtable;
 import java.util.List;
 import java.util.Locale;
-import java.util.TimeZone;
+import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import de.duenndns.ssl.MemorizingTrustManager;
@@ -53,11 +49,11 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.crypto.PgpEngine;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Bookmark;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Downloadable;
-import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.DownloadablePlaceholder;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.MucOptions;
@@ -78,12 +74,17 @@ import eu.siacs.conversations.utils.ExceptionHelper;
 import eu.siacs.conversations.utils.OnPhoneContactsLoadedListener;
 import eu.siacs.conversations.utils.PRNGFixes;
 import eu.siacs.conversations.utils.PhoneHelper;
+import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.OnBindListener;
 import eu.siacs.conversations.xmpp.OnContactStatusChanged;
 import eu.siacs.conversations.xmpp.OnIqPacketReceived;
 import eu.siacs.conversations.xmpp.OnMessageAcknowledged;
+import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
+import eu.siacs.conversations.xmpp.OnPresencePacketReceived;
 import eu.siacs.conversations.xmpp.OnStatusChanged;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
+import eu.siacs.conversations.xmpp.PacketReceived;
 import eu.siacs.conversations.xmpp.XmppConnection;
 import eu.siacs.conversations.xmpp.forms.Data;
 import eu.siacs.conversations.xmpp.forms.Field;
@@ -97,11 +98,12 @@ import eu.siacs.conversations.xmpp.stanzas.IqPacket;
 import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
 
-public class XmppConnectionService extends Service {
+public class XmppConnectionService extends Service implements OnPhoneContactsLoadedListener {
+
+	public static final String ACTION_CLEAR_NOTIFICATION = "clear_notification";
+	private static final String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
+	public static final String ACTION_DISABLE_FOREGROUND = "disable_foreground";
 
-	public static String ACTION_CLEAR_NOTIFICATION = "clear_notification";
-	private static String ACTION_MERGE_PHONE_CONTACTS = "merge_phone_contacts";
-	public static String ACTION_DISABLE_FOREGROUND = "disable_foreground";
 	private ContentObserver contactObserver = new ContentObserver(null) {
 		@Override
 		public void onChange(boolean selfChange) {
@@ -126,7 +128,7 @@ public class XmppConnectionService extends Service {
 					conversation.resetOtrSession();
 				}
 				if (online && (contact.getPresences().size() == 1)) {
-					sendUnsendMessages(conversation);
+					sendUnsentMessages(conversation);
 				}
 			}
 		}
@@ -135,18 +137,19 @@ public class XmppConnectionService extends Service {
 	private MemorizingTrustManager mMemorizingTrustManager;
 	private NotificationService mNotificationService = new NotificationService(
 			this);
-	private MessageParser mMessageParser = new MessageParser(this);
-	private PresenceParser mPresenceParser = new PresenceParser(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 final CopyOnWriteArrayList<Conversation> conversations = new CopyOnWriteArrayList<Conversation>();
+	private final List<Conversation> conversations = new CopyOnWriteArrayList<>();
 	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;
@@ -165,12 +168,13 @@ public class XmppConnectionService extends Service {
 				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();
-						sendUnsendMessages(conversation);
+						sendUnsentMessages(conversation);
 					}
 				}
 				if (connection != null && connection.getFeatures().csi()) {
@@ -209,13 +213,16 @@ public class XmppConnectionService extends Service {
 			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 FileObserver fileObserver = new FileObserver(
+	private final FileObserver fileObserver = new FileObserver(
 			FileBackend.getConversationsImageDirectory()) {
 
 		@Override
@@ -225,7 +232,7 @@ public class XmppConnectionService extends Service {
 			}
 		}
 	};
-	private OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
+	private final OnJinglePacketReceived jingleListener = new OnJinglePacketReceived() {
 
 		@Override
 		public void onJinglePacketReceived(Account account, JinglePacket packet) {
@@ -239,43 +246,41 @@ public class XmppConnectionService extends Service {
 	private PendingIntent pendingPingIntent = null;
 	private WakeLock wakeLock;
 	private PowerManager pm;
-	private OnBindListener mOnBindListener = new OnBindListener() {
+	private final OnBindListener mOnBindListener = new OnBindListener() {
 
 		@Override
 		public void onBind(final Account account) {
 			account.getRoster().clearPresences();
-			account.clearPresences(); // self presences
 			account.pendingConferenceJoins.clear();
 			account.pendingConferenceLeaves.clear();
 			fetchRosterFromServer(account);
 			fetchBookmarks(account);
-			sendPresencePacket(account,
-					mPresenceGenerator.sendPresence(account));
+			sendPresencePacket(account,mPresenceGenerator.sendPresence(account));
 			connectMultiModeConversations(account);
 			updateConversationUi();
 		}
 	};
 
-	private OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
+	private final OnMessageAcknowledged mOnMessageAcknowledgedListener = new OnMessageAcknowledged() {
 
 		@Override
 		public void onMessageAcknowledged(Account account, String uuid) {
-			for (Conversation conversation : getConversations()) {
+			for (final Conversation conversation : getConversations()) {
 				if (conversation.getAccount() == account) {
-					for (Message message : conversation.getMessages()) {
-						if ((message.getStatus() == Message.STATUS_UNSEND || message
-									.getStatus() == Message.STATUS_WAITING)
-								&& message.getUuid().equals(uuid)) {
-							markMessage(message, Message.STATUS_SEND);
-							return;
-								}
+					Message message = conversation.findUnsentMessageWithUuid(uuid);
+					if (message != null) {
+						markMessage(message, Message.STATUS_SEND);
+						if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
+							databaseBackend.updateConversation(conversation);
+						}
 					}
 				}
 			}
 		}
 	};
 	private LruCache<String, Bitmap> mBitmapCache;
-	private IqGenerator mIqGenerator = new IqGenerator(this);
+	private final IqGenerator mIqGenerator = new IqGenerator(this);
+	private Thread mPhoneContactMergerThread;
 
 	public PgpEngine getPgpEngine() {
 		if (pgpServiceConnection.isBound()) {
@@ -299,7 +304,9 @@ public class XmppConnectionService extends Service {
 		return this.mAvatarService;
 	}
 
-	public void attachFileToConversation(Conversation conversation, final Uri uri, final UiCallback<Message> callback) {
+	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, "",
@@ -359,13 +366,13 @@ public class XmppConnectionService extends Service {
 			@Override
 			public void run() {
 				try {
-					DownloadableFile file = getFileBackend().copyImageToPrivateStorage(message, uri);
+					getFileBackend().copyImageToPrivateStorage(message, uri);
 					if (conversation.getNextEncryption(forceEncryption()) == Message.ENCRYPTION_PGP) {
 						getPgpEngine().encrypt(message, callback);
 					} else {
 						callback.success(message);
 					}
-				} catch (FileBackend.FileCopyException e) {
+				} catch (final FileBackend.FileCopyException e) {
 					callback.error(e.getResId(), message);
 				}
 			}
@@ -384,7 +391,7 @@ public class XmppConnectionService extends Service {
 	public int onStartCommand(Intent intent, int flags, int startId) {
 		if (intent != null && intent.getAction() != null) {
 			if (intent.getAction().equals(ACTION_MERGE_PHONE_CONTACTS)) {
-				mergePhoneContactsWithRoster();
+				PhoneHelper.loadPhoneContacts(getApplicationContext(), new ArrayList<Bundle>(), this);
 				return START_STICKY;
 			} else if (intent.getAction().equals(Intent.ACTION_SHUTDOWN)) {
 				logoutAndSave();
@@ -479,11 +486,11 @@ public class XmppConnectionService extends Service {
 		this.mMemorizingTrustManager = new MemorizingTrustManager(
 				getApplicationContext());
 
-		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
-		int cacheSize = maxMemory / 8;
+		final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+		final int cacheSize = maxMemory / 8;
 		this.mBitmapCache = new LruCache<String, Bitmap>(cacheSize) {
 			@Override
-			protected int sizeOf(String key, Bitmap bitmap) {
+			protected int sizeOf(final String key, final Bitmap bitmap) {
 				return bitmap.getByteCount() / 1024;
 			}
 		};
@@ -491,12 +498,12 @@ public class XmppConnectionService extends Service {
 		this.databaseBackend = DatabaseBackend.getInstance(getApplicationContext());
 		this.accounts = databaseBackend.getAccounts();
 
-		for (Account account : this.accounts) {
+		for (final Account account : this.accounts) {
 			account.initOtrEngine(this);
 			this.databaseBackend.readRoster(account.getRoster());
 		}
 		initConversations();
-		this.mergePhoneContactsWithRoster();
+		PhoneHelper.loadPhoneContacts(getApplicationContext(),new ArrayList<Bundle>(), this);
 
 		getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, true, contactObserver);
 		this.fileObserver.startWatching();
@@ -517,7 +524,7 @@ public class XmppConnectionService extends Service {
 	}
 
 	@Override
-	public void onTaskRemoved(Intent rootIntent) {
+	public void onTaskRemoved(final Intent rootIntent) {
 		super.onTaskRemoved(rootIntent);
 		if (!getPreferences().getBoolean("keep_foreground_service",false)) {
 			this.logoutAndSave();
@@ -525,7 +532,7 @@ public class XmppConnectionService extends Service {
 	}
 
 	private void logoutAndSave() {
-		for (Account account : accounts) {
+		for (final Account account : accounts) {
 			databaseBackend.writeRoster(account.getRoster());
 			if (account.getXmppConnection() != null) {
 				disconnect(account, false);
@@ -578,26 +585,26 @@ public class XmppConnectionService extends Service {
 
 	}
 
-	public XmppConnection createConnection(Account account) {
-		SharedPreferences sharedPref = getPreferences();
+	public XmppConnection createConnection(final Account account) {
+		final SharedPreferences sharedPref = getPreferences();
 		account.setResource(sharedPref.getString("resource", "mobile")
 				.toLowerCase(Locale.getDefault()));
-		XmppConnection connection = new XmppConnection(account, this);
+		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.setOnMessageAcknowledgeListener(this.mOnMessageAcknowledgedListener);
+		connection.addOnAdvancedStreamFeaturesAvailableListener(this.mMessageArchiveService);
 		return connection;
 	}
 
-	public void sendMessage(Message message) {
-		Account account = message.getConversation().getAccount();
+	public void sendMessage(final Message message) {
+		final Account account = message.getConversation().getAccount();
 		account.deactivateGracePeriod();
-		Conversation conv = message.getConversation();
+		final Conversation conv = message.getConversation();
 		MessagePacket packet = null;
 		boolean saveInDb = true;
 		boolean send = false;
@@ -641,12 +648,22 @@ public class XmppConnectionService extends Service {
 					}
 				} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
 					message.getConversation().endOtrIfNeeded();
-					failWaitingOtrMessages(message.getConversation());
+					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();
-					failWaitingOtrMessages(message.getConversation());
+					message.getConversation().findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+						@Override
+						public void onMessageFound(Message message) {
+							markMessage(message,Message.STATUS_SEND_FAILED);
+						}
+					});
 					packet = mMessageGenerator.generateChat(message);
 					send = true;
 				}
@@ -689,16 +706,17 @@ public class XmppConnectionService extends Service {
 		updateConversationUi();
 	}
 
-	private void sendUnsendMessages(Conversation conversation) {
-		for (int i = 0; i < conversation.getMessages().size(); ++i) {
-			int status = conversation.getMessages().get(i).getStatus();
-			if (status == Message.STATUS_WAITING) {
-				resendMessage(conversation.getMessages().get(i));
+	private void sendUnsentMessages(final Conversation conversation) {
+		conversation.findWaitingMessages(new Conversation.OnMessageFound() {
+
+			@Override
+			public void onMessageFound(Message message) {
+				resendMessage(message);
 			}
-		}
+		});
 	}
 
-	private void resendMessage(Message message) {
+	private void resendMessage(final Message message) {
 		Account account = message.getConversation().getAccount();
 		MessagePacket packet = null;
 		if (message.getEncryption() == Message.ENCRYPTION_OTR) {
@@ -725,7 +743,7 @@ public class XmppConnectionService extends Service {
 						} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
 							mJingleConnectionManager.createNewConnection(message);
 						}
-					} catch (InvalidJidException e) {
+					} catch (final InvalidJidException ignored) {
 
 					}
 						}
@@ -768,47 +786,35 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	public void fetchRosterFromServer(Account account) {
-		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
+	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("jabber:iq:roster").setAttribute("ver",
+		iqPacket.query(Xmlns.ROSTER).setAttribute("ver",
 				account.getRosterVersion());
-		account.getXmppConnection().sendIqPacket(iqPacket,
-				new OnIqPacketReceived() {
-
-					@Override
-					public void onIqPacketReceived(final Account account,
-												   IqPacket packet) {
-						Element query = packet.findChild("query");
-						if (query != null) {
-							account.getRoster().markAllAsNotInRoster();
-							mIqParser.rosterItems(account, query);
-						}
-					}
-				});
+		account.getXmppConnection().sendIqPacket(iqPacket, mIqParser);
 	}
 
-	public void fetchBookmarks(Account account) {
-		IqPacket iqPacket = new IqPacket(IqPacket.TYPE_GET);
-		Element query = iqPacket.query("jabber:iq:private");
+	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");
-		OnIqPacketReceived callback = new OnIqPacketReceived() {
+		final PacketReceived callback = new OnIqPacketReceived() {
 
 			@Override
-			public void onIqPacketReceived(Account account, IqPacket packet) {
-				Element query = packet.query();
-				List<Bookmark> bookmarks = new CopyOnWriteArrayList<>();
-				Element storage = query.findChild("storage",
+			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 (Element item : storage.getChildren()) {
+					for (final Element item : storage.getChildren()) {
 						if (item.getName().equals("conference")) {
-							Bookmark bookmark = Bookmark.parse(item, account);
+							final Bookmark bookmark = Bookmark.parse(item, account);
 							bookmarks.add(bookmark);
 							Conversation conversation = find(bookmark);
 							if (conversation != null) {
@@ -826,7 +832,6 @@ public class XmppConnectionService extends Service {
 			}
 		};
 		sendIqPacket(account, iqPacket, callback);
-
 	}
 
 	public void pushBookmarks(Account account) {
@@ -839,53 +844,56 @@ public class XmppConnectionService extends Service {
 		sendIqPacket(account, iqPacket, null);
 	}
 
-	private void mergePhoneContactsWithRoster() {
-		PhoneHelper.loadPhoneContacts(getApplicationContext(),
-				new OnPhoneContactsLoadedListener() {
-					@Override
-					public void onPhoneContactsLoaded(List<Bundle> phoneContacts) {
-						for (Account account : accounts) {
-							account.getRoster().clearSystemAccounts();
+	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;
 						}
-						for (Bundle phoneContact : phoneContacts) {
-							for (Account account : accounts) {
-								Jid jid;
-								try {
-									jid = Jid.fromString(phoneContact.getString("jid"));
-								} catch (final InvalidJidException e) {
-									// TODO: Warn if contact import fails here?
-									break;
-								}
-								final Contact contact = account.getRoster()
-									.getContact(jid);
-								String systemAccount = phoneContact
-									.getInt("phoneid")
-									+ "#"
-									+ phoneContact.getString("lookup");
-								contact.setSystemAccount(systemAccount);
-								contact.setPhotoUri(phoneContact
-										.getString("photouri"));
-								contact.setSystemName(phoneContact
-										.getString("displayname"));
-								getAvatarService().clear(contact);
-							}
+						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 initConversations() {
 		synchronized (this.conversations) {
-			Hashtable<String, Account> accountLookupTable = new Hashtable<>();
+			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 conv : this.conversations) {
-				Account account = accountLookupTable.get(conv.getAccountUuid());
-				conv.setAccount(account);
-				conv.addAll(0, databaseBackend.getMessages(conv, 50));
-				checkDeletedFiles(conv);
+			for (Conversation conversation : this.conversations) {
+				Account account = accountLookupTable.get(conversation.getAccountUuid());
+				conversation.setAccount(account);
+				conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
+				checkDeletedFiles(conversation);
 			}
 		}
 	}
@@ -895,28 +903,26 @@ public class XmppConnectionService extends Service {
 	}
 
 	private void checkDeletedFiles(Conversation conversation) {
-		for (Message message : conversation.getMessages()) {
-			if ((message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE)
-					&& message.getEncryption() != Message.ENCRYPTION_PGP) {
+		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()) {
-			for (Message message : conversation.getMessages()) {
-				if (message.getType() == Message.TYPE_IMAGE
-						&& message.getEncryption() != Message.ENCRYPTION_PGP
-						&& message.getUuid().equals(uuid)) {
-					if (!getFileBackend().isFileAvailable(message)) {
-						message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
-						updateConversationUi();
-					}
-					return;
-						}
+			Message message = conversation.findMessageWithFileAndUuid(uuid);
+			if (message != null) {
+				if (!getFileBackend().isFileAvailable(message)) {
+					message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_DELETED));
+					updateConversationUi();
+				}
+				return;
 			}
 		}
 	}
@@ -952,22 +958,43 @@ public class XmppConnectionService extends Service {
 		});
 	}
 
-	public int loadMoreMessages(Conversation conversation, long timestamp) {
-		List<Message> messages = databaseBackend.getMessages(conversation, 50,
-				timestamp);
-		for (Message message : messages) {
-			message.setConversation(conversation);
+	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;
 		}
-		conversation.addAll(0, messages);
-		return messages.size();
+		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);
+					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 interface OnMoreMessagesLoaded {
+		public void onMoreMessagesLoaded(int count,Conversation conversation);
+		public void informUser(int r);
 	}
 
 	public List<Account> getAccounts() {
 		return this.accounts;
 	}
 
-	public Conversation find(List<Conversation> haystack, Contact contact) {
-		for (Conversation conversation : haystack) {
+	public Conversation find(final Iterable<Conversation> haystack, final Contact contact) {
+		for (final Conversation conversation : haystack) {
 			if (conversation.getContact() == contact) {
 				return conversation;
 			}
@@ -975,23 +1002,24 @@ public class XmppConnectionService extends Service {
 		return null;
 	}
 
-	public Conversation find(final List<Conversation> haystack,
-			final Account account,
-			final Jid jid) {
+	public Conversation find(final Iterable<Conversation> haystack, final Account account, final Jid jid) {
 		if (jid == null ) {
 			return null;
 		}
-		for (Conversation conversation : haystack) {
+		for (final Conversation conversation : haystack) {
 			if ((account == null || conversation.getAccount() == account)
-					&& (conversation.getContactJid().toBareJid().equals(jid.toBareJid()))) {
+					&& (conversation.getJid().toBareJid().equals(jid.toBareJid()))) {
 				return conversation;
 					}
 		}
 		return null;
 	}
 
-	public Conversation findOrCreateConversation(final Account account, final Jid jid,
-			final boolean muc) {
+	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) {
@@ -1006,7 +1034,7 @@ public class XmppConnectionService extends Service {
 				} else {
 					conversation.setMode(Conversation.MODE_SINGLE);
 				}
-				conversation.addAll(0, databaseBackend.getMessages(conversation, 50));
+				conversation.addAll(0, databaseBackend.getMessages(conversation, Config.PAGE_SIZE));
 				this.databaseBackend.updateConversation(conversation);
 			} else {
 				String conversationName;
@@ -1025,6 +1053,13 @@ public class XmppConnectionService extends Service {
 				}
 				this.databaseBackend.createConversation(conversation);
 			}
+			if (query == null) {
+				this.mMessageArchiveService.query(conversation);
+			} else {
+				if (query.getConversation() == null) {
+					this.mMessageArchiveService.query(conversation,query.getStart());
+				}
+			}
 			this.conversations.add(conversation);
 			updateConversationUi();
 			return conversation;
@@ -1051,13 +1086,7 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	public void clearConversationHistory(Conversation conversation) {
-		this.databaseBackend.deleteMessagesInConversation(conversation);
-		conversation.getMessages().clear();
-		updateConversationUi();
-	}
-
-	public void createAccount(Account account) {
+	public void createAccount(final Account account) {
 		account.initOtrEngine(this);
 		databaseBackend.createAccount(account);
 		this.accounts.add(account);
@@ -1065,7 +1094,7 @@ public class XmppConnectionService extends Service {
 		updateAccountUi();
 	}
 
-	public void updateAccount(Account account) {
+	public void updateAccount(final Account account) {
 		this.statusListener.onStatusChanged(account);
 		databaseBackend.updateAccount(account);
 		reconnectAccount(account, false);
@@ -1073,9 +1102,30 @@ public class XmppConnectionService extends Service {
 		getNotificationService().updateErrorNotification();
 	}
 
-	public void deleteAccount(Account account) {
+	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 interface OnAccountPasswordChanged {
+		public void onPasswordChangeSucceeded();
+		public void onPasswordChangeFailed();
+	}
+
+	public void deleteAccount(final Account account) {
 		synchronized (this.conversations) {
-			for (Conversation conversation : conversations) {
+			for (final Conversation conversation : conversations) {
 				if (conversation.getAccount() == account) {
 					if (conversation.getMode() == Conversation.MODE_MULTI) {
 						leaveMuc(conversation);
@@ -1147,7 +1197,7 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	public void setOnRosterUpdateListener(OnRosterUpdate listener) {
+	public void setOnRosterUpdateListener(final OnRosterUpdate listener) {
 		synchronized (this) {
 			if (checkListeners()) {
 				switchToForeground();
@@ -1172,6 +1222,31 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
+	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()) {
@@ -1199,7 +1274,9 @@ public class XmppConnectionService extends Service {
 
 	private boolean checkListeners() {
 		return (this.mOnAccountUpdate == null
-				&& this.mOnConversationUpdate == null && this.mOnRosterUpdate == null);
+				&& this.mOnConversationUpdate == null
+				&& this.mOnRosterUpdate == null
+				&& this.mOnUpdateBlocklist == null);
 	}
 
 	private void switchToForeground() {
@@ -1227,11 +1304,12 @@ public class XmppConnectionService extends Service {
 		Log.d(Config.LOGTAG, "app switched into background");
 	}
 
-	public void connectMultiModeConversations(Account account) {
+	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);
 					}
 		}
@@ -1251,29 +1329,18 @@ public class XmppConnectionService extends Service {
 			PresencePacket packet = new PresencePacket();
 			packet.setFrom(conversation.getAccount().getJid());
 			packet.setTo(joinJid);
-			Element x = new Element("x");
-			x.setAttribute("xmlns", "http://jabber.org/protocol/muc");
+			Element x = packet.addChild("x","http://jabber.org/protocol/muc");
 			if (conversation.getMucOptions().getPassword() != null) {
-				Element password = x.addChild("password");
-				password.setContent(conversation.getMucOptions().getPassword());
+				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);
 			}
-			if (conversation.getMessages().size() != 0) {
-				final SimpleDateFormat mDateFormat = new SimpleDateFormat(
-						"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
-				mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
-				Date date = new Date(conversation.getLatestMessage()
-						.getTimeSent() + 1000);
-				x.addChild("history").setAttribute("since",
-						mDateFormat.format(date));
-			}
-			packet.addChild(x);
 			sendPresencePacket(account, packet);
-			if (!joinJid.equals(conversation.getContactJid())) {
+			if (!joinJid.equals(conversation.getJid())) {
 				conversation.setContactJid(joinJid);
 				databaseBackend.updateConversation(conversation);
 			}
@@ -1315,7 +1382,7 @@ public class XmppConnectionService extends Service {
 
 				@Override
 				public void onFailure() {
-					callback.error(R.string.nick_in_use,conversation);
+					callback.error(R.string.nick_in_use, conversation);
 				}
 			});
 
@@ -1349,14 +1416,14 @@ public class XmppConnectionService extends Service {
 		account.pendingConferenceLeaves.remove(conversation);
 		if (account.getStatus() == Account.State.ONLINE) {
 			PresencePacket packet = new PresencePacket();
-			packet.setTo(conversation.getContactJid());
+			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.getContactJid());
+					+ ": leaving muc " + conversation.getJid());
 		} else {
 			account.pendingConferenceLeaves.add(conversation);
 		}
@@ -1381,8 +1448,8 @@ public class XmppConnectionService extends Service {
 		return null;
 	}
 
-	public void createAdhocConference(final Account account, final List<Jid> jids, final UiCallback<Conversation> callback) {
-		Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": creating adhoc conference with "+ jids.toString());
+	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);
@@ -1434,7 +1501,7 @@ public class XmppConnectionService extends Service {
 
 	public void pushConferenceConfiguration(final Conversation conversation,final Bundle options, final OnConferenceOptionsPushed callback) {
 		IqPacket request = new IqPacket(IqPacket.TYPE_GET);
-		request.setTo(conversation.getContactJid().toBareJid());
+		request.setTo(conversation.getJid().toBareJid());
 		request.query("http://jabber.org/protocol/muc#owner");
 		sendIqPacket(conversation.getAccount(),request,new OnIqPacketReceived() {
 			@Override
@@ -1448,7 +1515,7 @@ public class XmppConnectionService extends Service {
 					}
 					data.submit();
 					IqPacket set = new IqPacket(IqPacket.TYPE_SET);
-					set.setTo(conversation.getContactJid().toBareJid());
+					set.setTo(conversation.getJid().toBareJid());
 					set.query("http://jabber.org/protocol/muc#owner").addChild(data);
 					sendIqPacket(account, set, new OnIqPacketReceived() {
 						@Override
@@ -1486,7 +1553,7 @@ public class XmppConnectionService extends Service {
 							if (conversation.endOtrIfNeeded()) {
 								Log.d(Config.LOGTAG, account.getJid().toBareJid()
 										+ ": ended otr session with "
-										+ conversation.getContactJid());
+										+ conversation.getJid());
 							}
 						}
 					}
@@ -1528,36 +1595,35 @@ public class XmppConnectionService extends Service {
 	}
 
 	public void onOtrSessionEstablished(Conversation conversation) {
-		Account account = conversation.getAccount();
-		List<Message> messages = conversation.getMessages();
-		Session otrSession = conversation.getOtrSession();
+		final Account account = conversation.getAccount();
+		final Session otrSession = conversation.getOtrSession();
 		Log.d(Config.LOGTAG,
 				account.getJid().toBareJid() + " otr session established with "
-				+ conversation.getContactJid() + "/"
+				+ conversation.getJid() + "/"
 				+ otrSession.getSessionID().getUserID());
-		for (Message msg : messages) {
-			if ((msg.getStatus() == Message.STATUS_UNSEND || msg.getStatus() == Message.STATUS_WAITING)
-					&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
+		conversation.findUnsentMessagesWithOtrEncryption(new Conversation.OnMessageFound() {
+
+			@Override
+			public void onMessageFound(Message message) {
 				SessionID id = otrSession.getSessionID();
 				try {
-					msg.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
+					message.setCounterpart(Jid.fromString(id.getAccountID() + "/" + id.getUserID()));
 				} catch (InvalidJidException e) {
-					break;
+					return;
 				}
-				if (msg.getType() == Message.TYPE_TEXT) {
-					MessagePacket outPacket = mMessageGenerator
-						.generateOtrChat(msg, true);
+				if (message.getType() == Message.TYPE_TEXT) {
+					MessagePacket outPacket = mMessageGenerator.generateOtrChat(message, true);
 					if (outPacket != null) {
-						msg.setStatus(Message.STATUS_SEND);
-						databaseBackend.updateMessage(msg);
+						message.setStatus(Message.STATUS_SEND);
+						databaseBackend.updateMessage(message);
 						sendMessagePacket(account, outPacket);
 					}
-				} else if (msg.getType() == Message.TYPE_IMAGE || msg.getType() == Message.TYPE_FILE) {
-					mJingleConnectionManager.createNewConnection(msg);
+				} else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) {
+					mJingleConnectionManager.createNewConnection(message);
 				}
-					}
-		}
-		updateConversationUi();
+				updateConversationUi();
+			}
+		});
 	}
 
 	public boolean renewSymmetricKey(Conversation conversation) {
@@ -1587,17 +1653,17 @@ public class XmppConnectionService extends Service {
 		return false;
 	}
 
-	public void pushContactToServer(Contact contact) {
+	public void pushContactToServer(final Contact contact) {
 		contact.resetOption(Contact.Options.DIRTY_DELETE);
 		contact.setOption(Contact.Options.DIRTY_PUSH);
-		Account account = contact.getAccount();
+		final Account account = contact.getAccount();
 		if (account.getStatus() == Account.State.ONLINE) {
-			boolean ask = contact.getOption(Contact.Options.ASKING);
-			boolean sendUpdates = contact
+			final boolean ask = contact.getOption(Contact.Options.ASKING);
+			final boolean sendUpdates = contact
 				.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)
 				&& contact.getOption(Contact.Options.PREEMPTIVE_GRANT);
-			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
-			iq.query("jabber:iq:roster").addChild(contact.asElement());
+			final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
+			iq.query(Xmlns.ROSTER).addChild(contact.asElement());
 			account.getXmppConnection().sendIqPacket(iq, null);
 			if (sendUpdates) {
 				sendPresencePacket(account,
@@ -1610,7 +1676,8 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	public void publishAvatar(Account account, Uri image,
+	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;
@@ -1630,13 +1697,13 @@ public class XmppConnectionService extends Service {
 				callback.error(R.string.error_saving_avatar, avatar);
 				return;
 			}
-			IqPacket packet = this.mIqGenerator.publishAvatar(avatar);
+			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) {
-						IqPacket packet = XmppConnectionService.this.mIqGenerator
+						final IqPacket packet = XmppConnectionService.this.mIqGenerator
 							.publishAvatarMetadata(avatar);
 						sendIqPacket(account, packet, new OnIqPacketReceived() {
 
@@ -1679,7 +1746,7 @@ public class XmppConnectionService extends Service {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket result) {
 				final String ERROR = account.getJid().toBareJid()
-						+ ": fetching avatar for " + avatar.owner + " failed ";
+					+ ": fetching avatar for " + avatar.owner + " failed ";
 				if (result.getType() == IqPacket.TYPE_RESULT) {
 					avatar.image = mIqParser.avatarData(result);
 					if (avatar.image != null) {
@@ -1693,7 +1760,7 @@ public class XmppConnectionService extends Service {
 								updateAccountUi();
 							} else {
 								Contact contact = account.getRoster()
-										.getContact(avatar.owner);
+									.getContact(avatar.owner);
 								contact.setAvatar(avatar.getFilename());
 								getAvatarService().clear(contact);
 								updateConversationUi();
@@ -1769,7 +1836,7 @@ public class XmppConnectionService extends Service {
 		Account account = contact.getAccount();
 		if (account.getStatus() == Account.State.ONLINE) {
 			IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
-			Element item = iq.query("jabber:iq:roster").addChild("item");
+			Element item = iq.query(Xmlns.ROSTER).addChild("item");
 			item.setAttribute("jid", contact.getJid().toString());
 			item.setAttribute("subscription", "remove");
 			account.getXmppConnection().sendIqPacket(iq, null);
@@ -1812,12 +1879,13 @@ public class XmppConnectionService extends Service {
 	public void resetSendingToWaiting(Account account) {
 		for (Conversation conversation : getConversations()) {
 			if (conversation.getAccount() == account) {
-				for (Message message : conversation.getMessages()) {
-					if (message.getType() != Message.TYPE_IMAGE
-							&& message.getStatus() == Message.STATUS_UNSEND) {
+				conversation.findUnsentTextMessages(new Conversation.OnMessageFound() {
+
+					@Override
+					public void onMessageFound(Message message) {
 						markMessage(message, Message.STATUS_WAITING);
-							}
-				}
+					}
+				});
 			}
 		}
 	}
@@ -1828,7 +1896,7 @@ public class XmppConnectionService extends Service {
 			return false;
 		} else {
 			for (Conversation conversation : getConversations()) {
-				if (conversation.getContactJid().equals(recipient)
+				if (conversation.getJid().equals(recipient)
 						&& conversation.getAccount().equals(account)) {
 					return markMessage(conversation, uuid, status);
 						}
@@ -1842,15 +1910,13 @@ public class XmppConnectionService extends Service {
 		if (uuid == null) {
 			return false;
 		} else {
-			for (Message message : conversation.getMessages()) {
-				if (uuid.equals(message.getUuid())
-						|| (message.getStatus() >= Message.STATUS_SEND && uuid
-							.equals(message.getRemoteMsgId()))) {
-					markMessage(message, status);
-					return true;
-							}
+			Message message = conversation.findSentMessageWithUuid(uuid);
+			if (message!=null) {
+				markMessage(message,status);
+				return true;
+			} else {
+				return false;
 			}
-			return false;
 		}
 	}
 
@@ -1904,6 +1970,12 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
+	public void updateBlocklistUi(final OnUpdateBlocklist.Status status) {
+		if (mOnUpdateBlocklist != null) {
+			mOnUpdateBlocklist.OnUpdateBlocklist(status);
+		}
+	}
+
 	public void updateMucRosterUi() {
 		if (mOnMucRosterUpdate != null) {
 			mOnMucRosterUpdate.onMucRosterUpdate();
@@ -1928,29 +2000,22 @@ public class XmppConnectionService extends Service {
 		return null;
 	}
 
-	public void markRead(Conversation conversation, boolean calledByUi) {
+	public void markRead(final Conversation conversation) {
 		mNotificationService.clear(conversation);
-		final Message markable = conversation.getLatestMarkableMessage();
 		conversation.markRead();
-		if (confirmMessages() && markable != null && markable.getRemoteMsgId() != null && calledByUi) {
+	}
+
+	public void sendReadMarker(final Conversation conversation) {
+		final Message markable = conversation.getLatestMarkableMessage();
+		this.markRead(conversation);
+		if (confirmMessages() && 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);
 		}
-		if (!calledByUi) {
-			updateConversationUi();
-		}
-	}
-
-	public void failWaitingOtrMessages(Conversation conversation) {
-		for (Message message : conversation.getMessages()) {
-			if (message.getEncryption() == Message.ENCRYPTION_OTR
-					&& message.getStatus() == Message.STATUS_WAITING) {
-				markMessage(message, Message.STATUS_SEND_FAILED);
-					}
-		}
+		updateConversationUi();
 	}
 
 	public SecureRandom getRNG() {
@@ -1969,14 +2034,6 @@ public class XmppConnectionService extends Service {
 		return this.mBitmapCache;
 	}
 
-	public void replyWithNotAcceptable(Account account, MessagePacket packet) {
-		if (account.getStatus() == Account.State.ONLINE) {
-			MessagePacket error = this.mMessageGenerator
-				.generateNotAcceptable(packet);
-			sendMessagePacket(account, error);
-		}
-	}
-
 	public void syncRosterToDisk(final Account account) {
 		new Thread(new Runnable() {
 
@@ -1989,12 +2046,12 @@ public class XmppConnectionService extends Service {
 	}
 
 	public List<String> getKnownHosts() {
-		List<String> hosts = new ArrayList<>();
-		for (Account account : getAccounts()) {
+		final List<String> hosts = new ArrayList<>();
+		for (final Account account : getAccounts()) {
 			if (!hosts.contains(account.getServer().toString())) {
 				hosts.add(account.getServer().toString());
 			}
-			for (Contact contact : account.getRoster().getContacts()) {
+			for (final Contact contact : account.getRoster().getContacts()) {
 				if (contact.showInRoster()) {
 					final String server = contact.getServer().toString();
 					if (server != null && !hosts.contains(server)) {
@@ -2007,10 +2064,10 @@ public class XmppConnectionService extends Service {
 	}
 
 	public List<String> getKnownConferenceHosts() {
-		ArrayList<String> mucServers = new ArrayList<>();
-		for (Account account : accounts) {
+		final ArrayList<String> mucServers = new ArrayList<>();
+		for (final Account account : accounts) {
 			if (account.getXmppConnection() != null) {
-				String server = account.getXmppConnection().getMucServer();
+				final String server = account.getXmppConnection().getMucServer();
 				if (server != null && !mucServers.contains(server)) {
 					mucServers.add(server);
 				}
@@ -2033,9 +2090,8 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	public void sendIqPacket(Account account, IqPacket packet,
-			OnIqPacketReceived callback) {
-		XmppConnection connection = account.getXmppConnection();
+	public void sendIqPacket(final Account account, final IqPacket packet, final PacketReceived callback) {
+		final XmppConnection connection = account.getXmppConnection();
 		if (connection != null) {
 			connection.sendIqPacket(packet, callback);
 		}
@@ -2053,10 +2109,16 @@ public class XmppConnectionService extends Service {
 		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()) {
@@ -2078,8 +2140,8 @@ public class XmppConnectionService extends Service {
 		return this.mHttpConnectionManager;
 	}
 
-	public void resendFailedMessages(Message message) {
-		List<Message> messages = new ArrayList<>();
+	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);
@@ -2089,12 +2151,23 @@ public class XmppConnectionService extends Service {
 				break;
 			}
 		}
-		for (Message msg : messages) {
+		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 interface OnConversationUpdate {
 		public void onConversationUpdate();
 	}
@@ -2121,4 +2194,35 @@ public class XmppConnectionService extends Service {
 			return XmppConnectionService.this;
 		}
 	}
+
+	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);
+					}
+				}
+			});
+		}
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/AbstractSearchableListItemActivity.java b/src/main/java/eu/siacs/conversations/ui/AbstractSearchableListItemActivity.java
new file mode 100644
index 00000000..1a9fc95c
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/ui/AbstractSearchableListItemActivity.java
@@ -0,0 +1,124 @@
+package eu.siacs.conversations.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 eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.ListItem;
+import eu.siacs.conversations.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/eu/siacs/conversations/ui/BlockContactDialog.java b/src/main/java/eu/siacs/conversations/ui/BlockContactDialog.java
new file mode 100644
index 00000000..9cf7e9f8
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/ui/BlockContactDialog.java
@@ -0,0 +1,41 @@
+package eu.siacs.conversations.ui;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Blockable;
+import eu.siacs.conversations.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/eu/siacs/conversations/ui/BlocklistActivity.java b/src/main/java/eu/siacs/conversations/ui/BlocklistActivity.java
new file mode 100644
index 00000000..13d7f4fc
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/ui/BlocklistActivity.java
@@ -0,0 +1,75 @@
+package eu.siacs.conversations.ui;
+
+import android.os.Bundle;
+import android.text.Editable;
+import android.view.View;
+import android.widget.AdapterView;
+
+import java.util.Collections;
+
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Contact;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
+import eu.siacs.conversations.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/eu/siacs/conversations/ui/ChangePasswordActivity.java b/src/main/java/eu/siacs/conversations/ui/ChangePasswordActivity.java
new file mode 100644
index 00000000..54c064c6
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/ui/ChangePasswordActivity.java
@@ -0,0 +1,107 @@
+package eu.siacs.conversations.ui;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.xmpp.jid.InvalidJidException;
+import eu.siacs.conversations.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.trim().isEmpty()) {
+					mNewPassword.requestFocus();
+					mNewPassword.setError(getString(R.string.password_should_not_be_empty));
+				} 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/eu/siacs/conversations/ui/ChooseContactActivity.java b/src/main/java/eu/siacs/conversations/ui/ChooseContactActivity.java
index e7254933..70b353c6 100644
--- a/src/main/java/eu/siacs/conversations/ui/ChooseContactActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ChooseContactActivity.java
@@ -1,101 +1,33 @@
 package eu.siacs.conversations.ui;
 
-import java.util.ArrayList;
-import java.util.Collections;
-
 import android.content.Context;
 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.inputmethod.InputMethodManager;
 import android.widget.AdapterView;
-import android.widget.ArrayAdapter;
-import android.widget.EditText;
-import android.widget.ListView;
-import eu.siacs.conversations.R;
+
+import java.util.Collections;
+
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.ListItem;
-import eu.siacs.conversations.ui.adapter.ListItemAdapter;
-
-public class ChooseContactActivity extends XmppActivity {
-
-	private ListView mListView;
-	private ArrayList<ListItem> contacts = new ArrayList<>();
-	private ArrayAdapter<ListItem> mContactsAdapter;
-
-	private EditText mSearchEditText;
-
-	private TextWatcher mSearchTextWatcher = new TextWatcher() {
-
-		@Override
-		public void afterTextChanged(Editable editable) {
-			filterContacts(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.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("");
-			filterContacts(null);
-			return true;
-		}
-	};
 
+public class ChooseContactActivity extends AbstractSearchableListItemActivity {
 	@Override
-	public void onCreate(Bundle savedInstanceState) {
+	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);
-		mContactsAdapter = new ListItemAdapter(this, contacts);
-		mListView.setAdapter(mContactsAdapter);
-		mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+		getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
 
 			@Override
-			public void onItemClick(AdapterView<?> arg0, View arg1,
-					int position, long arg3) {
-				InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
-				imm.hideSoftInputFromWindow(mSearchEditText.getWindowToken(),
+			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);
-				Intent request = getIntent();
-				Intent data = new Intent();
-				ListItem mListItem = contacts.get(position);
+				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) {
@@ -108,38 +40,21 @@ public class ChooseContactActivity extends XmppActivity {
 				finish();
 			}
 		});
-	}
 
-	@Override
-	public boolean onCreateOptionsMenu(Menu menu) {
-		getMenuInflater().inflate(R.menu.choose_contact, menu);
-		MenuItem menuSearchView = menu.findItem(R.id.action_search);
-		View mSearchView = menuSearchView.getActionView();
-		mSearchEditText = (EditText) mSearchView
-				.findViewById(R.id.search_field);
-		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
-		menuSearchView.setOnActionExpandListener(mOnActionExpandListener);
-		return true;
 	}
 
-	@Override
-	void onBackendConnected() {
-		filterContacts(null);
-	}
-
-	protected void filterContacts(String needle) {
-		this.contacts.clear();
-		for (Account account : xmppConnectionService.getAccounts()) {
+	protected void filterContacts(final String needle) {
+		getListItems().clear();
+		for (final Account account : xmppConnectionService.getAccounts()) {
 			if (account.getStatus() != Account.State.DISABLED) {
-				for (Contact contact : account.getRoster().getContacts()) {
+				for (final Contact contact : account.getRoster().getContacts()) {
 					if (contact.showInRoster() && contact.match(needle)) {
-						this.contacts.add(contact);
+						getListItems().add(contact);
 					}
 				}
 			}
 		}
-		Collections.sort(this.contacts);
-		mContactsAdapter.notifyDataSetChanged();
+		Collections.sort(getListItems());
+		getListItemAdapter().notifyDataSetChanged();
 	}
-
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
index 2e36c545..eeb015f3 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
@@ -157,8 +157,8 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 						@Override
 						public void onValueEdited(String value) {
 							MessagePacket packet = xmppConnectionService
-									.getMessageGenerator().conferenceSubject(
-											mConversation, value);
+								.getMessageGenerator().conferenceSubject(
+										mConversation, value);
 							xmppConnectionService.sendMessagePacket(
 									mConversation.getAccount(), packet);
 						}
@@ -191,7 +191,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 	@Override
 	protected String getShareableUri() {
 		if (mConversation != null) {
-			return "xmpp:" + mConversation.getContactJid().toBareJid().toString() + "?join";
+			return "xmpp:" + mConversation.getJid().toBareJid().toString() + "?join";
 		} else {
 			return "";
 		}
@@ -202,7 +202,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		MenuItem menuItemSaveBookmark = menu.findItem(R.id.action_save_as_bookmark);
 		MenuItem menuItemDeleteBookmark = menu.findItem(R.id.action_delete_bookmark);
 		Account account = mConversation.getAccount();
-		if (account.hasBookmarkFor(mConversation.getContactJid().toBareJid())) {
+		if (account.hasBookmarkFor(mConversation.getJid().toBareJid())) {
 			menuItemSaveBookmark.setVisible(false);
 			menuItemDeleteBookmark.setVisible(true);
 		} else {
@@ -263,9 +263,9 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 
 	protected void saveAsBookmark() {
 		Account account = mConversation.getAccount();
-		Bookmark bookmark = new Bookmark(account, mConversation.getContactJid().toBareJid());
-		if (!mConversation.getContactJid().isBareJid()) {
-			bookmark.setNick(mConversation.getContactJid().getResourcepart());
+		Bookmark bookmark = new Bookmark(account, mConversation.getJid().toBareJid());
+		if (!mConversation.getJid().isBareJid()) {
+			bookmark.setNick(mConversation.getJid().getResourcepart());
 		}
 		bookmark.setAutojoin(true);
 		account.getBookmarks().add(bookmark);
@@ -288,7 +288,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		}
 		if (uuid != null) {
 			this.mConversation = xmppConnectionService
-					.findConversationByUuid(uuid);
+				.findConversationByUuid(uuid);
 			if (this.mConversation != null) {
 				populateView();
 			}
@@ -297,11 +297,11 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 
 	private void populateView() {
 		mAccountJid.setText(getString(R.string.using_account, mConversation
-				.getAccount().getJid().toBareJid()));
+					.getAccount().getJid().toBareJid()));
 		mYourPhoto.setImageBitmap(avatarService().get(
-				mConversation.getAccount(), getPixel(48)));
+					mConversation.getAccount(), getPixel(48)));
 		setTitle(mConversation.getName());
-		mFullJid.setText(mConversation.getContactJid().toBareJid().toString());
+		mFullJid.setText(mConversation.getJid().toBareJid().toString());
 		mYourNick.setText(mConversation.getMucOptions().getActualNick());
 		mRoleAffiliaton = (TextView) findViewById(R.id.muc_role);
 		if (mConversation.getMucOptions().online()) {
@@ -338,7 +338,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			registerForContextMenu(view);
 			view.setTag(user);
 			TextView name = (TextView) view
-					.findViewById(R.id.contact_display_name);
+				.findViewById(R.id.contact_display_name);
 			TextView key = (TextView) view.findViewById(R.id.key);
 			TextView role = (TextView) view.findViewById(R.id.contact_jid);
 			if (user.getPgpKeyId() != 0) {
diff --git a/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java b/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
index 4259371a..657ae75b 100644
--- a/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ContactDetailsActivity.java
@@ -37,11 +37,13 @@ import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.ListItem;
 import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
 import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
+import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.utils.UIHelper;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
-public class ContactDetailsActivity extends XmppActivity implements OnAccountUpdate, OnRosterUpdate {
+public class ContactDetailsActivity extends XmppActivity implements OnAccountUpdate, OnRosterUpdate, OnUpdateBlocklist {
 	public static final String ACTION_VIEW_CONTACT = "view_contact";
 
 	private Contact contact;
@@ -50,7 +52,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		@Override
 		public void onClick(DialogInterface dialog, int which) {
 			ContactDetailsActivity.this.xmppConnectionService
-					.deleteContactOnServer(contact);
+				.deleteContactOnServer(contact);
 			ContactDetailsActivity.this.finish();
 		}
 	};
@@ -58,14 +60,14 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 
 		@Override
 		public void onCheckedChanged(CompoundButton buttonView,
-									 boolean isChecked) {
+				boolean isChecked) {
 			if (isChecked) {
 				if (contact
 						.getOption(Contact.Options.PENDING_SUBSCRIPTION_REQUEST)) {
 					xmppConnectionService.sendPresencePacket(contact
-									.getAccount(),
+							.getAccount(),
 							xmppConnectionService.getPresenceGenerator()
-									.sendPresenceUpdatesTo(contact));
+							.sendPresenceUpdatesTo(contact));
 				} else {
 					contact.setOption(Contact.Options.PREEMPTIVE_GRANT);
 				}
@@ -73,7 +75,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				contact.resetOption(Contact.Options.PREEMPTIVE_GRANT);
 				xmppConnectionService.sendPresencePacket(contact.getAccount(),
 						xmppConnectionService.getPresenceGenerator()
-								.stopPresenceUpdatesTo(contact));
+						.stopPresenceUpdatesTo(contact));
 			}
 		}
 	};
@@ -81,15 +83,15 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 
 		@Override
 		public void onCheckedChanged(CompoundButton buttonView,
-									 boolean isChecked) {
+				boolean isChecked) {
 			if (isChecked) {
 				xmppConnectionService.sendPresencePacket(contact.getAccount(),
 						xmppConnectionService.getPresenceGenerator()
-								.requestPresenceUpdatesFrom(contact));
+						.requestPresenceUpdatesFrom(contact));
 			} else {
 				xmppConnectionService.sendPresencePacket(contact.getAccount(),
 						xmppConnectionService.getPresenceGenerator()
-								.stopPresenceUpdatesFrom(contact));
+						.stopPresenceUpdatesFrom(contact));
 			}
 		}
 	};
@@ -127,7 +129,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 					ContactDetailsActivity.this);
 			builder.setTitle(getString(R.string.action_add_phone_book));
 			builder.setMessage(getString(R.string.add_phone_book_text,
-					contact.getJid()));
+						contact.getJid()));
 			builder.setNegativeButton(getString(R.string.cancel), null);
 			builder.setPositiveButton(getString(R.string.add), addToPhonebook);
 			builder.create().show();
@@ -166,7 +168,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	}
 
 	@Override
-	protected void onCreate(Bundle savedInstanceState) {
+	protected void onCreate(final Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		if (getIntent().getAction().equals(ACTION_VIEW_CONTACT)) {
 			try {
@@ -188,15 +190,17 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		badge = (QuickContactBadge) findViewById(R.id.details_contact_badge);
 		keys = (LinearLayout) findViewById(R.id.details_contact_keys);
 		tags = (LinearLayout) findViewById(R.id.tags);
-		getActionBar().setHomeButtonEnabled(true);
-		getActionBar().setDisplayHomeAsUpEnabled(true);
+		if (getActionBar() != null) {
+			getActionBar().setHomeButtonEnabled(true);
+			getActionBar().setDisplayHomeAsUpEnabled(true);
+		}
 
-		SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+		final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
 		this.showDynamicTags = preferences.getBoolean("show_dynamic_tags",false);
 	}
 
 	@Override
-	public boolean onOptionsItemSelected(MenuItem menuItem) {
+	public boolean onOptionsItemSelected(final MenuItem menuItem) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setNegativeButton(getString(R.string.cancel), null);
 		switch (menuItem.getItemId()) {
@@ -205,11 +209,11 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				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();
+					.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) {
@@ -219,7 +223,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 						public void onValueEdited(String value) {
 							contact.setServerName(value);
 							ContactDetailsActivity.this.xmppConnectionService
-									.pushContactToServer(contact);
+								.pushContactToServer(contact);
 							populateView();
 						}
 					});
@@ -285,7 +289,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		receive.setOnCheckedChangeListener(this.mOnReceiveCheckedChange);
 
 		lastseen.setText(UIHelper.lastseen(getApplicationContext(),
-				contact.lastseen.time));
+					contact.lastseen.time));
 
 		if (contact.getPresences().size() > 1) {
 			contactJidTv.setText(contact.getJid() + " ("
@@ -294,7 +298,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 			contactJidTv.setText(contact.getJid().toString());
 		}
 		accountJidTv.setText(getString(R.string.using_account, contact
-				.getAccount().getJid().toBareJid()));
+					.getAccount().getJid().toBareJid()));
 		prepareContactBadge(badge, contact);
 		if (contact.getSystemAccount() == null) {
 			badge.setOnClickListener(onBadgeClick);
@@ -309,10 +313,10 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 			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);
+				.findViewById(R.id.button_remove);
 			remove.setVisibility(View.VISIBLE);
 			keyType.setText("OTR Fingerprint");
-			key.setText(otrFingerprint);
+			key.setText(CryptoHelper.prettifyFingerprint(otrFingerprint));
 			keys.addView(view);
 			remove.setOnClickListener(new OnClickListener() {
 
@@ -334,7 +338,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 				@Override
 				public void onClick(View v) {
 					PgpEngine pgp = ContactDetailsActivity.this.xmppConnectionService
-							.getPgpEngine();
+						.getPgpEngine();
 					if (pgp != null) {
 						PendingIntent intent = pgp.getIntentForKey(contact);
 						if (intent != null) {
@@ -363,8 +367,8 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 		} else {
 			tags.setVisibility(View.VISIBLE);
 			tags.removeAllViewsInLayout();
-			for(ListItem.Tag tag : tagList) {
-				TextView tv = (TextView) inflater.inflate(R.layout.list_item_tag,tags,false);
+			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);
@@ -393,8 +397,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 					public void onClick(DialogInterface dialog, int which) {
 						if (contact.deleteOtrFingerprint(fingerprint)) {
 							populateView();
-							xmppConnectionService.syncRosterToDisk(contact
-									.getAccount());
+							xmppConnectionService.syncRosterToDisk(contact.getAccount());
 						}
 					}
 
@@ -406,7 +409,7 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 	public void onBackendConnected() {
 		if ((accountJid != null) && (contactJid != null)) {
 			Account account = xmppConnectionService
-					.findAccountByJid(accountJid);
+				.findAccountByJid(accountJid);
 			if (account == null) {
 				return;
 			}
@@ -414,4 +417,15 @@ public class ContactDetailsActivity extends XmppActivity implements OnAccountUpd
 			populateView();
 		}
 	}
+
+	@Override
+	public void OnUpdateBlocklist(final Status status) {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				populateView();
+			}
+		});
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
index 5b0fa562..5cfc1116 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
@@ -9,13 +9,13 @@ import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
+import android.media.MediaActionSound;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.SystemClock;
 import android.provider.MediaStore;
 import android.support.v4.widget.SlidingPaneLayout;
 import android.support.v4.widget.SlidingPaneLayout.PanelSlideListener;
-import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -28,10 +28,14 @@ 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 eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Message;
@@ -40,27 +44,23 @@ import eu.siacs.conversations.services.XmppConnectionService.OnConversationUpdat
 import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
 import eu.siacs.conversations.ui.adapter.ConversationAdapter;
 import eu.siacs.conversations.utils.ExceptionHelper;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 
-public class ConversationActivity extends XmppActivity implements
-		OnAccountUpdate, OnConversationUpdate, OnRosterUpdate {
+public class ConversationActivity extends XmppActivity
+	implements OnAccountUpdate, OnConversationUpdate, OnRosterUpdate, OnUpdateBlocklist {
 
 	public static final String VIEW_CONVERSATION = "viewConversation";
 	public static final String CONVERSATION = "conversationUuid";
 	public static final String TEXT = "text";
 	public static final String NICK = "nick";
-	public static final String PRESENCE = "eu.siacs.conversations.presence";
 
 	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 REQUEST_ATTACH_IMAGE_DIALOG = 0x0203;
-	private static final int REQUEST_IMAGE_CAPTURE = 0x0204;
-	private static final int REQUEST_RECORD_AUDIO = 0x0205;
-	private static final int REQUEST_SEND_PGP_IMAGE = 0x0206;
-	private static final int REQUEST_ATTACH_FILE_DIALOG = 0x0208;
 	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 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";
@@ -81,6 +81,8 @@ public class ConversationActivity extends XmppActivity implements
 
 	private Toast prepareFileToast;
 
+	private boolean mActivityPaused = false;
+
 
 	public List<Conversation> getConversationList() {
 		return this.conversationList;
@@ -94,10 +96,6 @@ public class ConversationActivity extends XmppActivity implements
 		this.mSelectedConversation = conversation;
 	}
 
-	public ListView getConversationListView() {
-		return this.listView;
-	}
-
 	public void showConversationsOverview() {
 		if (mContentView instanceof SlidingPaneLayout) {
 			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
@@ -144,12 +142,12 @@ public class ConversationActivity extends XmppActivity implements
 	protected void onCreate(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);
-			}
+				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);
@@ -172,7 +170,7 @@ public class ConversationActivity extends XmppActivity implements
 
 			@Override
 			public void onItemClick(AdapterView<?> arg0, View clickedView,
-									int position, long arg3) {
+					int position, long arg3) {
 				if (getSelectedConversation() != conversationList.get(position)) {
 					setSelectedConversation(conversationList.get(position));
 					ConversationActivity.this.mConversationFragment.reInit(getSelectedConversation());
@@ -188,7 +186,7 @@ public class ConversationActivity extends XmppActivity implements
 			SlidingPaneLayout mSlidingPaneLayout = (SlidingPaneLayout) mContentView;
 			mSlidingPaneLayout.setParallaxDistance(150);
 			mSlidingPaneLayout
-					.setShadowResource(R.drawable.es_slidingpane_shadow);
+				.setShadowResource(R.drawable.es_slidingpane_shadow);
 			mSlidingPaneLayout.setSliderFadeColor(0);
 			mSlidingPaneLayout.setPanelSlideListener(new PanelSlideListener() {
 
@@ -199,7 +197,7 @@ public class ConversationActivity extends XmppActivity implements
 					hideKeyboard();
 					if (xmppConnectionServiceBound) {
 						xmppConnectionService.getNotificationService()
-								.setOpenConversation(null);
+							.setOpenConversation(null);
 					}
 					closeContextMenu();
 				}
@@ -244,7 +242,7 @@ public class ConversationActivity extends XmppActivity implements
 				if (conversation.getMode() == Conversation.MODE_SINGLE || useSubjectToIdentifyConference()) {
 					ab.setTitle(conversation.getName());
 				} else {
-					ab.setTitle(conversation.getContactJid().toBareJid().toString());
+					ab.setTitle(conversation.getJid().toBareJid().toString());
 				}
 			} else {
 				ab.setDisplayHomeAsUpEnabled(false);
@@ -258,28 +256,33 @@ public class ConversationActivity extends XmppActivity implements
 		this.updateActionBarTitle();
 		this.invalidateOptionsMenu();
 		if (xmppConnectionServiceBound) {
-			xmppConnectionService.getNotificationService().setOpenConversation(getSelectedConversation());
-			if (!getSelectedConversation().isRead()) {
-				xmppConnectionService.markRead(getSelectedConversation(), true);
-				listView.invalidateViews();
-			}
+			final Conversation conversation = getSelectedConversation();
+			xmppConnectionService.getNotificationService().setOpenConversation(conversation);
+			sendReadMarkerIfNecessary(conversation);
+		}
+	}
+
+	public void sendReadMarkerIfNecessary(final Conversation conversation) {
+		if (!mActivityPaused && !conversation.isRead()) {
+			xmppConnectionService.sendReadMarker(conversation);
 		}
 	}
 
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu) {
 		getMenuInflater().inflate(R.menu.conversations, menu);
-		MenuItem menuSecure = menu.findItem(R.id.action_security);
-		MenuItem menuArchive = menu.findItem(R.id.action_archive);
-		MenuItem menuMucDetails = menu.findItem(R.id.action_muc_details);
-		MenuItem menuContactDetails = menu
-				.findItem(R.id.action_contact_details);
-		MenuItem menuAttach = menu.findItem(R.id.action_attach_file);
-		MenuItem menuClearHistory = menu.findItem(R.id.action_clear_history);
-		MenuItem menuAdd = menu.findItem(R.id.action_add);
-		MenuItem menuInviteContact = menu.findItem(R.id.action_invite);
-		MenuItem menuMute = menu.findItem(R.id.action_mute);
-		MenuItem menuUnmute = menu.findItem(R.id.action_unmute);
+		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);
+		final MenuItem menuBlock = menu.findItem(R.id.action_block);
+		final MenuItem menuUnblock = menu.findItem(R.id.action_unblock);
 
 		if (isConversationsOverviewVisable()
 				&& isConversationsOverviewHideable()) {
@@ -292,19 +295,33 @@ public class ConversationActivity extends XmppActivity implements
 			menuClearHistory.setVisible(false);
 			menuMute.setVisible(false);
 			menuUnmute.setVisible(false);
+			menuBlock.setVisible(false);
+			menuUnblock.setVisible(false);
 		} else {
 			menuAdd.setVisible(!isConversationsOverviewHideable());
 			if (this.getSelectedConversation() != null) {
 				if (this.getSelectedConversation().getLatestMessage()
 						.getEncryption() != Message.ENCRYPTION_NONE) {
 					menuSecure.setIcon(R.drawable.ic_action_secure);
-				}
+						}
 				if (this.getSelectedConversation().getMode() == Conversation.MODE_MULTI) {
 					menuContactDetails.setVisible(false);
 					menuAttach.setVisible(false);
+					menuBlock.setVisible(false);
+					menuUnblock.setVisible(false);
 				} else {
 					menuMucDetails.setVisible(false);
 					menuInviteContact.setTitle(R.string.conference_with);
+					if (this.getSelectedConversation().isBlocked()) {
+						menuBlock.setVisible(false);
+					} else {
+						menuUnblock.setVisible(false);
+					}
+					final Account account = this.getSelectedConversation().getAccount();
+					if (!(account.isOnlineAndConnected() && account.getXmppConnection().getFeatures().blocking())) {
+						menuBlock.setVisible(false);
+						menuUnblock.setVisible(false);
+					}
 				}
 				if (this.getSelectedConversation().isMuted()) {
 					menuMute.setVisible(false);
@@ -321,33 +338,37 @@ public class ConversationActivity extends XmppActivity implements
 
 			@Override
 			public void onPresenceSelected() {
-				if (attachmentChoice == ATTACHMENT_CHOICE_TAKE_PHOTO) {
-					mPendingImageUri = xmppConnectionService.getFileBackend()
-							.getTakePhotoUri();
-					Intent takePictureIntent = new Intent(
-							MediaStore.ACTION_IMAGE_CAPTURE);
-					takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
-							mPendingImageUri);
-					if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
-						startActivityForResult(takePictureIntent,
-								REQUEST_IMAGE_CAPTURE);
+				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;
+				}
+				if (intent.resolveActivity(getPackageManager()) != null) {
+					if (chooser) {
+						startActivityForResult(
+								Intent.createChooser(intent,getString(R.string.perform_action_with)),
+								attachmentChoice);
+					} else {
+						startActivityForResult(intent, attachmentChoice);
 					}
-				} else if (attachmentChoice == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
-					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_ATTACH_IMAGE_DIALOG);
-				} else if (attachmentChoice == ATTACHMENT_CHOICE_CHOOSE_FILE) {
-					Intent attachFileIntent = new Intent();
-					//attachFileIntent.setType("file/*");
-					attachFileIntent.setType("*/*");
-					attachFileIntent.addCategory(Intent.CATEGORY_OPENABLE);
-					attachFileIntent.setAction(Intent.ACTION_GET_CONTENT);
-					Intent chooser = Intent.createChooser(attachFileIntent,
-							getString(R.string.attach_file));
-					startActivityForResult(chooser, REQUEST_ATTACH_FILE_DIALOG);
 				}
 			}
 		});
@@ -364,7 +385,7 @@ public class ConversationActivity extends XmppActivity implements
 
 								@Override
 								public void userInputRequried(PendingIntent pi,
-															  Contact contact) {
+										Contact contact) {
 									ConversationActivity.this.runIntent(pi,
 											attachmentChoice);
 								}
@@ -381,18 +402,18 @@ public class ConversationActivity extends XmppActivity implements
 							});
 				} else {
 					final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
-							.findFragmentByTag("conversation");
+						.findFragmentByTag("conversation");
 					if (fragment != null) {
 						fragment.showNoPGPKeyDialog(false,
 								new OnClickListener() {
 
 									@Override
 									public void onClick(DialogInterface dialog,
-														int which) {
+											int which) {
 										conversation
-												.setNextEncryption(Message.ENCRYPTION_NONE);
+											.setNextEncryption(Message.ENCRYPTION_NONE);
 										xmppConnectionService.databaseBackend
-												.updateConversation(conversation);
+											.updateConversation(conversation);
 										selectPresenceToAttachFile(attachmentChoice);
 									}
 								});
@@ -402,7 +423,7 @@ public class ConversationActivity extends XmppActivity implements
 				showInstallPgpDialog();
 			}
 		} else if (getSelectedConversation().getNextEncryption(
-				forceEncryption()) == Message.ENCRYPTION_NONE) {
+					forceEncryption()) == Message.ENCRYPTION_NONE) {
 			selectPresenceToAttachFile(attachmentChoice);
 		} else {
 			selectPresenceToAttachFile(attachmentChoice);
@@ -410,7 +431,7 @@ public class ConversationActivity extends XmppActivity implements
 	}
 
 	@Override
-	public boolean onOptionsItemSelected(MenuItem item) {
+	public boolean onOptionsItemSelected(final MenuItem item) {
 		if (item.getItemId() == android.R.id.home) {
 			showConversationsOverview();
 			return true;
@@ -455,6 +476,12 @@ public class ConversationActivity extends XmppActivity implements
 				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;
 			}
@@ -483,7 +510,7 @@ public class ConversationActivity extends XmppActivity implements
 		View dialogView = getLayoutInflater().inflate(
 				R.layout.dialog_clear_history, null);
 		final CheckBox endConversationCheckBox = (CheckBox) dialogView
-				.findViewById(R.id.end_conversation_checkbox);
+			.findViewById(R.id.end_conversation_checkbox);
 		builder.setView(dialogView);
 		builder.setNegativeButton(getString(R.string.cancel), null);
 		builder.setPositiveButton(getString(R.string.delete_messages),
@@ -491,10 +518,12 @@ public class ConversationActivity extends XmppActivity implements
 
 					@Override
 					public void onClick(DialogInterface dialog, int which) {
-						ConversationActivity.this.xmppConnectionService
-								.clearConversationHistory(conversation);
+						ConversationActivity.this.xmppConnectionService.clearConversationHistory(conversation);
 						if (endConversationCheckBox.isChecked()) {
 							endConversation(conversation);
+						} else {
+							updateConversationList();
+							ConversationActivity.this.mConversationFragment.updateMessages();
 						}
 					}
 				});
@@ -508,28 +537,68 @@ public class ConversationActivity extends XmppActivity implements
 		}
 		PopupMenu attachFilePopup = new PopupMenu(this, menuAttachFile);
 		attachFilePopup.inflate(R.menu.attachment_choices);
-		attachFilePopup
-				.setOnMenuItemClickListener(new OnMenuItemClickListener() {
+		if (new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION).resolveActivity(getPackageManager()) == null) {
+			attachFilePopup.getMenu().findItem(R.id.attach_record_voice).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_record_voice:
-								attachFile(ATTACHMENT_CHOICE_CHOOSE_FILE);
-								break;
-						}
-						return false;
+				@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;
 					}
-				});
+					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) {
@@ -537,7 +606,7 @@ public class ConversationActivity extends XmppActivity implements
 		}
 		PopupMenu popup = new PopupMenu(this, menuItemView);
 		final ConversationFragment fragment = (ConversationFragment) getFragmentManager()
-				.findFragmentByTag("conversation");
+			.findFragmentByTag("conversation");
 		if (fragment != null) {
 			popup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
 
@@ -557,7 +626,7 @@ public class ConversationActivity extends XmppActivity implements
 								if (conversation.getAccount().getKeys()
 										.has("pgp_signature")) {
 									conversation
-											.setNextEncryption(Message.ENCRYPTION_PGP);
+										.setNextEncryption(Message.ENCRYPTION_PGP);
 									item.setChecked(true);
 								} else {
 									announcePgp(conversation.getAccount(),
@@ -572,7 +641,7 @@ public class ConversationActivity extends XmppActivity implements
 							break;
 					}
 					xmppConnectionService.databaseBackend
-							.updateConversation(conversation);
+						.updateConversation(conversation);
 					fragment.updateChatMsgHint();
 					return true;
 				}
@@ -597,11 +666,11 @@ public class ConversationActivity extends XmppActivity implements
 					break;
 				case Message.ENCRYPTION_PGP:
 					popup.getMenu().findItem(R.id.encryption_choice_pgp)
-							.setChecked(true);
+						.setChecked(true);
 					break;
 				default:
 					popup.getMenu().findItem(R.id.encryption_choice_none)
-							.setChecked(true);
+						.setChecked(true);
 					break;
 			}
 			popup.show();
@@ -617,17 +686,17 @@ public class ConversationActivity extends XmppActivity implements
 				new OnClickListener() {
 
 					@Override
-					public void onClick(DialogInterface dialog, int which) {
-						long till;
+					public void onClick(final DialogInterface dialog, final int which) {
+						final long till;
 						if (durations[which] == -1) {
 							till = Long.MAX_VALUE;
 						} else {
 							till = SystemClock.elapsedRealtime()
-									+ (durations[which] * 1000);
+								+ (durations[which] * 1000);
 						}
 						conversation.setMutedTill(till);
 						ConversationActivity.this.xmppConnectionService.databaseBackend
-								.updateConversation(conversation);
+							.updateConversation(conversation);
 						updateConversationList();
 						ConversationActivity.this.mConversationFragment.updateMessages();
 						invalidateOptionsMenu();
@@ -676,6 +745,28 @@ public class ConversationActivity extends XmppActivity implements
 	}
 
 	@Override
+	public void onPause() {
+		super.onPause();
+		this.mActivityPaused = true;
+		if (this.xmppConnectionServiceBound) {
+			this.xmppConnectionService.getNotificationService().setIsInForeground(false);
+		}
+	}
+
+	@Override
+	public void onResume() {
+		super.onResume();
+		int theme = findTheme();
+		if (this.mTheme != theme) {
+			recreate();
+		}
+		this.mActivityPaused = false;
+		if (this.xmppConnectionServiceBound) {
+			this.xmppConnectionService.getNotificationService().setIsInForeground(true);
+		}
+	}
+
+	@Override
 	public void onSaveInstanceState(final Bundle savedInstanceState) {
 		Conversation conversation = getSelectedConversation();
 		if (conversation != null) {
@@ -692,6 +783,7 @@ public class ConversationActivity extends XmppActivity implements
 
 	@Override
 	void onBackendConnected() {
+		this.xmppConnectionService.getNotificationService().setIsInForeground(true);
 		updateConversationList();
 		if (xmppConnectionService.getAccounts().size() == 0) {
 			startActivity(new Intent(this, EditAccountActivity.class));
@@ -752,11 +844,11 @@ public class ConversationActivity extends XmppActivity implements
 	}
 
 	private void selectConversationByUuid(String uuid) {
-        for (Conversation aConversationList : conversationList) {
-            if (aConversationList.getUuid().equals(uuid)) {
-                setSelectedConversation(aConversationList);
-            }
-        }
+		for (Conversation aConversationList : conversationList) {
+			if (aConversationList.getUuid().equals(uuid)) {
+				setSelectedConversation(aConversationList);
+			}
+		}
 	}
 
 	@Override
@@ -767,50 +859,35 @@ public class ConversationActivity extends XmppActivity implements
 
 	@Override
 	protected void onActivityResult(int requestCode, int resultCode,
-									final Intent data) {
+			final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (resultCode == RESULT_OK) {
 			if (requestCode == REQUEST_DECRYPT_PGP) {
 				mConversationFragment.hideSnackbar();
 				mConversationFragment.updateMessages();
-			} else if (requestCode == REQUEST_ATTACH_IMAGE_DIALOG) {
+			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
 				mPendingImageUri = data.getData();
 				if (xmppConnectionServiceBound) {
-					attachImageToConversation(getSelectedConversation(),
-							mPendingImageUri);
+					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
 					mPendingImageUri = null;
 				}
-			} else if (requestCode == REQUEST_ATTACH_FILE_DIALOG) {
+			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_FILE || requestCode == ATTACHMENT_CHOICE_RECORD_VOICE) {
 				mPendingFileUri = data.getData();
 				if (xmppConnectionServiceBound) {
-					attachFileToConversation(getSelectedConversation(),
-							mPendingFileUri);
+					attachFileToConversation(getSelectedConversation(),mPendingFileUri);
 					mPendingFileUri = null;
 				}
-			} else if (requestCode == REQUEST_SEND_PGP_IMAGE) {
-
-			} else if (requestCode == ATTACHMENT_CHOICE_CHOOSE_IMAGE) {
-				attachFile(ATTACHMENT_CHOICE_CHOOSE_IMAGE);
-			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
-				attachFile(ATTACHMENT_CHOICE_TAKE_PHOTO);
-			} else if (requestCode == REQUEST_ANNOUNCE_PGP) {
-				announcePgp(getSelectedConversation().getAccount(),
-						getSelectedConversation());
-			} else if (requestCode == REQUEST_ENCRYPT_MESSAGE) {
-				// encryptTextMessage();
-			} else if (requestCode == REQUEST_IMAGE_CAPTURE && mPendingImageUri != null) {
+			} else if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO && mPendingImageUri != null) {
 				if (xmppConnectionServiceBound) {
-					attachImageToConversation(getSelectedConversation(),
-							mPendingImageUri);
+					attachImageToConversation(getSelectedConversation(),mPendingImageUri);
 					mPendingImageUri = null;
 				}
-				Intent intent = new Intent(
-						Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 				intent.setData(mPendingImageUri);
 				sendBroadcast(intent);
 			}
 		} else {
-			if (requestCode == REQUEST_IMAGE_CAPTURE) {
+			if (requestCode == ATTACHMENT_CHOICE_TAKE_PHOTO) {
 				mPendingImageUri = null;
 			}
 		}
@@ -848,10 +925,8 @@ public class ConversationActivity extends XmppActivity implements
 
 					@Override
 					public void userInputRequried(PendingIntent pi,
-												  Message object) {
+							Message object) {
 						hidePrepareFileToast();
-						ConversationActivity.this.runIntent(pi,
-								ConversationActivity.REQUEST_SEND_PGP_IMAGE);
 					}
 
 					@Override
@@ -881,7 +956,7 @@ public class ConversationActivity extends XmppActivity implements
 
 	public void updateConversationList() {
 		xmppConnectionService
-				.populateWithOrderedConversations(conversationList);
+			.populateWithOrderedConversations(conversationList);
 		listAdapter.notifyDataSetChanged();
 	}
 
@@ -899,7 +974,7 @@ public class ConversationActivity extends XmppActivity implements
 
 					@Override
 					public void userInputRequried(PendingIntent pi,
-												  Message message) {
+							Message message) {
 						ConversationActivity.this.runIntent(pi,
 								ConversationActivity.REQUEST_SEND_MESSAGE);
 					}
@@ -951,7 +1026,7 @@ public class ConversationActivity extends XmppActivity implements
 				updateConversationList();
 				if (conversationList.size() == 0) {
 					startActivity(new Intent(getApplicationContext(),
-							StartConversationActivity.class));
+								StartConversationActivity.class));
 					finish();
 				}
 				ConversationActivity.this.mConversationFragment.updateMessages();
@@ -964,12 +1039,31 @@ public class ConversationActivity extends XmppActivity implements
 	public void onRosterUpdate() {
 		runOnUiThread(new Runnable() {
 
-				@Override
-				public void run() {
-					updateConversationList();
-					ConversationActivity.this.mConversationFragment.updateMessages();
-					updateActionBarTitle();
-				}
-			});
+			@Override
+			public void run() {
+				updateConversationList();
+				ConversationActivity.this.mConversationFragment.updateMessages();
+				updateActionBarTitle();
+			}
+		});
+	}
+
+	@Override
+	public void OnUpdateBlocklist(Status status) {
+		invalidateOptionsMenu();
+		runOnUiThread(new Runnable() {
+			@Override
+			public void run() {
+				ConversationActivity.this.mConversationFragment.updateMessages();
+			}
+		});
+	}
+
+	public void unblockConversation(final Blockable conversation) {
+		xmppConnectionService.sendUnblockRequest(conversation);
+	}
+
+	public void blockConversation(final Blockable conversation) {
+		xmppConnectionService.sendBlockRequest(conversation);
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index 0edc6b6f..93a4cc7e 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -103,7 +103,9 @@ public class ConversationFragment extends Fragment {
 	private RelativeLayout snackbar;
 	private TextView snackbarMessage;
 	private TextView snackbarAction;
-	private boolean messagesLoaded = false;
+	private boolean messagesLoaded = true;
+	private Toast messageLoaderToast;
+
 	private OnScrollListener mOnScrollListener = new OnScrollListener() {
 
 		@Override
@@ -114,20 +116,69 @@ public class ConversationFragment extends Fragment {
 
 		@Override
 		public void onScroll(AbsListView view, int firstVisibleItem,
-							 int visibleItemCount, int totalItemCount) {
+				int visibleItemCount, int totalItemCount) {
 			synchronized (ConversationFragment.this.messageList) {
-				if (firstVisibleItem == 0 && messagesLoaded) {
+				if (firstVisibleItem < 5 && messagesLoaded && messageList.size() > 0) {
 					long timestamp = ConversationFragment.this.messageList.get(0).getTimeSent();
 					messagesLoaded = false;
-					int size = activity.xmppConnectionService.loadMoreMessages(conversation, timestamp);
-					ConversationFragment.this.messageList.clear();
-					ConversationFragment.this.messageList.addAll(conversation.getMessages());
-					updateStatusMessages();
-					messageListAdapter.notifyDataSetChanged();
-					if (size != 0) {
-						messagesLoaded = true;
-					}
-					messagesView.setSelectionFromTop(size + 1, 0);
+					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();
+								}
+							});
+
+						}
+					});
+
 				}
 			}
 		}
@@ -153,13 +204,7 @@ public class ConversationFragment extends Fragment {
 
 		@Override
 		public void onClick(View v) {
-			if (conversation.getOtrFingerprint() != null) {
-				Intent intent = new Intent(getActivity(), VerifyOTRActivity.class);
-				intent.setAction(VerifyOTRActivity.ACTION_VERIFY_CONTACT);
-				intent.putExtra("contact", conversation.getContact().getJid().toBareJid().toString());
-				intent.putExtra("account", conversation.getAccount().getJid().toBareJid().toString());
-				startActivity(intent);
-			}
+			activity.verifyOtrSessionDialog(conversation,v);
 		}
 	};
 	private ConcurrentLinkedQueue<Message> mEncryptedMessages = new ConcurrentLinkedQueue<>();
@@ -170,7 +215,7 @@ public class ConversationFragment extends Fragment {
 		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);
+					.getSystemService(Context.INPUT_METHOD_SERVICE);
 				imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
 				sendMessage();
 				return true;
@@ -213,7 +258,7 @@ public class ConversationFragment extends Fragment {
 		}
 		Message message = new Message(conversation, mEditMessage.getText()
 				.toString(), conversation.getNextEncryption(activity
-				.forceEncryption()));
+					.forceEncryption()));
 		if (conversation.getMode() == Conversation.MODE_MULTI) {
 			if (conversation.getNextCounterpart() != null) {
 				message.setCounterpart(conversation.getNextCounterpart());
@@ -234,13 +279,13 @@ public class ConversationFragment extends Fragment {
 		if (conversation.getMode() == Conversation.MODE_MULTI
 				&& conversation.getNextCounterpart() != null) {
 			this.mEditMessage.setHint(getString(
-					R.string.send_private_message_to,
-					conversation.getNextCounterpart().getResourcepart()));
+						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));
+						.setHint(getString(R.string.send_plain_text_message));
 					break;
 				case Message.ENCRYPTION_OTR:
 					mEditMessage.setHint(getString(R.string.send_otr_message));
@@ -256,7 +301,7 @@ public class ConversationFragment extends Fragment {
 
 	@Override
 	public View onCreateView(final LayoutInflater inflater,
-							 ViewGroup container, Bundle savedInstanceState) {
+			ViewGroup container, Bundle savedInstanceState) {
 		final View view = inflater.inflate(R.layout.fragment_conversation,
 				container, false);
 		mEditMessage = (EditMessage) view.findViewById(R.id.textinput);
@@ -289,49 +334,51 @@ public class ConversationFragment extends Fragment {
 		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());
-									}
-								}
+			@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 {
-								Contact contact = message.getConversation()
-										.getContact();
-								if (contact.showInRoster()) {
-									activity.switchToContactDetails(contact);
-								} else {
-									activity.showAddToRosterDialog(message
-											.getConversation());
-								}
+								highlightInConference(message.getCounterpart().toString());
 							}
+						}
+					} else {
+						Contact contact = message.getConversation()
+							.getContact();
+						if (contact.showInRoster()) {
+							activity.switchToContactDetails(contact);
 						} else {
-							Account account = message.getConversation().getAccount();
-							Intent intent = new Intent(activity, EditAccountActivity.class);
-							intent.putExtra("jid", account.getJid().toBareJid().toString());
-							startActivity(intent);
+							activity.showAddToRosterDialog(message
+									.getConversation());
 						}
 					}
-				});
+				} 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() {
+			.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());
-								}
+				@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);
@@ -341,7 +388,7 @@ public class ConversationFragment extends Fragment {
 
 	@Override
 	public void onCreateContextMenu(ContextMenu menu, View v,
-									ContextMenuInfo menuInfo) {
+			ContextMenuInfo menuInfo) {
 		synchronized (this.messageList) {
 			super.onCreateContextMenu(menu, v, menuInfo);
 			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
@@ -351,7 +398,8 @@ public class ConversationFragment extends Fragment {
 	}
 
 	private void populateContextMenu(ContextMenu menu) {
-		if (this.selectedMessage.getType() != Message.TYPE_STATUS) {
+		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);
@@ -360,29 +408,26 @@ public class ConversationFragment extends Fragment {
 			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 (this.selectedMessage.getType() != Message.TYPE_TEXT
-					|| this.selectedMessage.getDownloadable() != null) {
+			if (m.getType() != Message.TYPE_TEXT || m.getDownloadable() != null) {
 				copyText.setVisible(false);
 			}
-			if (this.selectedMessage.getType() != Message.TYPE_IMAGE
-					|| this.selectedMessage.getDownloadable() != null) {
+			if (m.getType() != Message.TYPE_IMAGE || m.getDownloadable() != null) {
 				shareImage.setVisible(false);
 			}
-			if (this.selectedMessage.getStatus() != Message.STATUS_SEND_FAILED) {
+			if (m.getStatus() != Message.STATUS_SEND_FAILED) {
 				sendAgain.setVisible(false);
 			}
-			if ((this.selectedMessage.getType() != Message.TYPE_IMAGE && this.selectedMessage
-					.getDownloadable() == null)
-					|| this.selectedMessage.getImageParams().url == null) {
+			if ((m.getType() != Message.TYPE_IMAGE && m.getDownloadable() == null)
+					|| m.getImageParams().url == null) {
 				copyUrl.setVisible(false);
 			}
-			if (this.selectedMessage.getType() != Message.TYPE_TEXT
-					|| this.selectedMessage.getDownloadable() != null
-					|| !this.selectedMessage.bodyContainsDownloadable()) {
+			if (m.getType() != Message.TYPE_TEXT
+					|| m.getDownloadable() != null
+					|| !m.bodyContainsDownloadable()) {
 				downloadImage.setVisible(false);
 			}
-			if (this.selectedMessage.getDownloadable() == null
-					|| this.selectedMessage.getDownloadable() instanceof DownloadablePlaceholder) {
+			if (!((m.getDownloadable() != null && !(m.getDownloadable() instanceof DownloadablePlaceholder))
+					|| (m.isFileOrImage() && m.getStatus() == Message.STATUS_WAITING))) {
 				cancelTransmission.setVisible(false);
 			}
 		}
@@ -419,16 +464,16 @@ public class ConversationFragment extends Fragment {
 		shareIntent.setAction(Intent.ACTION_SEND);
 		shareIntent.putExtra(Intent.EXTRA_STREAM,
 				activity.xmppConnectionService.getFileBackend()
-						.getJingleFileUri(message));
+				.getJingleFileUri(message));
 		shareIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 		shareIntent.setType("image/webp");
 		activity.startActivity(Intent.createChooser(shareIntent,
-				getText(R.string.share_with)));
+					getText(R.string.share_with)));
 	}
 
 	private void copyText(Message message) {
 		if (activity.copyTextToClipboard(message.getMergedBody(),
-				R.string.message_text)) {
+					R.string.message_text)) {
 			Toast.makeText(activity, R.string.message_copied_to_clipboard,
 					Toast.LENGTH_SHORT).show();
 		}
@@ -448,21 +493,23 @@ public class ConversationFragment extends Fragment {
 
 	private void copyUrl(Message message) {
 		if (activity.copyTextToClipboard(
-				message.getImageParams().url.toString(), R.string.image_url)) {
+					message.getImageParams().url.toString(), R.string.image_url)) {
 			Toast.makeText(activity, R.string.url_copied_to_clipboard,
 					Toast.LENGTH_SHORT).show();
-		}
+					}
 	}
 
 	private void downloadImage(Message message) {
 		activity.xmppConnectionService.getHttpConnectionManager()
-				.createNewConnection(message);
+			.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);
 		}
 	}
 
@@ -478,9 +525,9 @@ public class ConversationFragment extends Fragment {
 			mEditMessage.getText().insert(0, nick + ": ");
 		} else {
 			if (mEditMessage.getText().charAt(
-					mEditMessage.getSelectionStart() - 1) != ' ') {
+						mEditMessage.getSelectionStart() - 1) != ' ') {
 				nick = " " + nick;
-			}
+						}
 			mEditMessage.getText().insert(mEditMessage.getSelectionStart(),
 					nick + " ");
 		}
@@ -501,6 +548,7 @@ public class ConversationFragment extends Fragment {
 		}
 		if (this.conversation != null) {
 			this.conversation.setNextMessage(mEditMessage.getText().toString());
+			this.conversation.trim();
 		}
 		this.activity = (ConversationActivity) getActivity();
 		this.conversation = conversation;
@@ -511,8 +559,13 @@ public class ConversationFragment extends Fragment {
 		}
 		this.mEditMessage.setText("");
 		this.mEditMessage.append(this.conversation.getNextMessage());
-		this.messagesView.invalidate();
+		this.messagesView.invalidateViews();
 		updateMessages();
+		this.messagesLoaded = true;
+		int size = this.messageList.size();
+		if (size > 0) {
+			messagesView.setSelection(size - 1);
+		}
 	}
 
 	public void updateMessages() {
@@ -524,12 +577,30 @@ public class ConversationFragment extends Fragment {
 			final ConversationActivity activity = (ConversationActivity) getActivity();
 			if (this.conversation != null) {
 				final Contact contact = this.conversation.getContact();
-				if (this.conversation.isMuted()) {
+				if (this.conversation.isBlocked()) {
+					showSnackbar(R.string.contact_blocked, R.string.unblock,
+							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(getActivity(), ((ConversationActivity) getActivity()).xmppConnectionService, conversation);
+									} else {
+										((ConversationActivity) getActivity()).unblockConversation(conversation);
+									}
+								}
+							});
+				} else if (this.conversation.isMuted()) {
 					showSnackbar(R.string.notifications_disabled, R.string.enable,
 							new OnClickListener() {
 
 								@Override
-								public void onClick(View v) {
+								public void onClick(final View v) {
 									activity.unmuteConversation(conversation);
 								}
 							});
@@ -542,7 +613,7 @@ public class ConversationFragment extends Fragment {
 								@Override
 								public void onClick(View v) {
 									activity.xmppConnectionService
-											.createContact(contact);
+										.createContact(contact);
 									activity.switchToContactDetails(contact);
 								}
 							});
@@ -579,31 +650,24 @@ public class ConversationFragment extends Fragment {
 						default:
 							break;
 					}
-				}
-				this.messageList.clear();
-				if (this.conversation.getMessages().size() == 0) {
-					messagesLoaded = false;
-				} else {
-					this.messageList.addAll(this.conversation.getMessages());
-					messagesLoaded = true;
-					for (Message message : this.messageList) {
-						if (message.getEncryption() == Message.ENCRYPTION_PGP
-								&& (message.getStatus() == Message.STATUS_RECEIVED || message
+						}
+				conversation.populateWithMessages(ConversationFragment.this.messageList);
+				for (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);
-							}
+							&& message.getDownloadable() == null) {
+						if (!mEncryptedMessages.contains(message)) {
+							mEncryptedMessages.add(message);
 						}
-					}
-					decryptNext();
-					updateStatusMessages();
+							}
 				}
+				decryptNext();
+				updateStatusMessages();
 				this.messageListAdapter.notifyDataSetChanged();
 				updateChatMsgHint();
 				if (!activity.isConversationsOverviewVisable() || !activity.isConversationsOverviewHideable()) {
-					activity.xmppConnectionService.markRead(conversation, true);
-					activity.updateConversationList();
+					activity.sendReadMarkerIfNecessary(conversation);
 				}
 				this.updateSendButton();
 			}
@@ -667,44 +731,44 @@ public class ConversationFragment extends Fragment {
 				switch (c.getContact().getMostAvailableStatus()) {
 					case Presences.CHAT:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_online);
+							.setImageResource(R.drawable.ic_action_send_now_online);
 						break;
 					case Presences.ONLINE:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_online);
+							.setImageResource(R.drawable.ic_action_send_now_online);
 						break;
 					case Presences.AWAY:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_away);
+							.setImageResource(R.drawable.ic_action_send_now_away);
 						break;
 					case Presences.XA:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_away);
+							.setImageResource(R.drawable.ic_action_send_now_away);
 						break;
 					case Presences.DND:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_dnd);
+							.setImageResource(R.drawable.ic_action_send_now_dnd);
 						break;
 					default:
 						this.mSendButton
-								.setImageResource(R.drawable.ic_action_send_now_offline);
+							.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);
+						.setImageResource(R.drawable.ic_action_send_now_online);
 				} else {
 					this.mSendButton
-							.setImageResource(R.drawable.ic_action_send_now_offline);
+						.setImageResource(R.drawable.ic_action_send_now_offline);
 				}
 			} else {
 				this.mSendButton
-						.setImageResource(R.drawable.ic_action_send_now_offline);
+					.setImageResource(R.drawable.ic_action_send_now_offline);
 			}
 		} else {
 			this.mSendButton
-					.setImageResource(R.drawable.ic_action_send_now_offline);
+				.setImageResource(R.drawable.ic_action_send_now_offline);
 		}
 	}
 
@@ -716,8 +780,7 @@ public class ConversationFragment extends Fragment {
 						return;
 					} else {
 						if (this.messageList.get(i).getStatus() == Message.STATUS_SEND_DISPLAYED) {
-							this.messageList.add(i + 1,
-									Message.createStatusMessage(conversation));
+							this.messageList.add(i + 1,Message.createStatusMessage(conversation));
 							return;
 						}
 					}
@@ -728,19 +791,30 @@ public class ConversationFragment extends Fragment {
 
 	protected void makeFingerprintWarning() {
 		if (conversation.smpRequested()) {
-			showSnackbar(R.string.smp_requested, R.string.verify, clickToVerify);
+			showSnackbar(R.string.smp_requested, R.string.verify, 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);
+				}
+			});
 		} else if (conversation.hasValidOtrSession() && (conversation.getOtrSession().getSessionStatus() == SessionStatus.ENCRYPTED)
 				&& (!conversation.isOtrFingerprintVerified())) {
 			showSnackbar(R.string.unknown_otr_fingerprint, R.string.verify, clickToVerify);
-		}
+				}
 	}
 
-	protected void showSnackbar(int message, int action,
-								OnClickListener clickListener) {
+	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);
 	}
@@ -767,7 +841,7 @@ public class ConversationFragment extends Fragment {
 
 								@Override
 								public void userInputRequried(PendingIntent pi,
-															  Contact contact) {
+										Contact contact) {
 									activity.runIntent(
 											pi,
 											ConversationActivity.REQUEST_ENCRYPT_MESSAGE);
@@ -791,11 +865,11 @@ public class ConversationFragment extends Fragment {
 
 								@Override
 								public void onClick(DialogInterface dialog,
-													int which) {
+										int which) {
 									conversation
-											.setNextEncryption(Message.ENCRYPTION_NONE);
+										.setNextEncryption(Message.ENCRYPTION_NONE);
 									xmppService.databaseBackend
-											.updateConversation(conversation);
+										.updateConversation(conversation);
 									message.setEncryption(Message.ENCRYPTION_NONE);
 									xmppService.sendMessage(message);
 									messageSent();
@@ -806,9 +880,9 @@ public class ConversationFragment extends Fragment {
 				if (conversation.getMucOptions().pgpKeysInUse()) {
 					if (!conversation.getMucOptions().everybodyHasKeys()) {
 						Toast warning = Toast
-								.makeText(getActivity(),
-										R.string.missing_public_keys,
-										Toast.LENGTH_LONG);
+							.makeText(getActivity(),
+									R.string.missing_public_keys,
+									Toast.LENGTH_LONG);
 						warning.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
 						warning.show();
 					}
@@ -820,12 +894,12 @@ public class ConversationFragment extends Fragment {
 
 								@Override
 								public void onClick(DialogInterface dialog,
-													int which) {
+										int which) {
 									conversation
-											.setNextEncryption(Message.ENCRYPTION_NONE);
+										.setNextEncryption(Message.ENCRYPTION_NONE);
 									message.setEncryption(Message.ENCRYPTION_NONE);
 									xmppService.databaseBackend
-											.updateConversation(conversation);
+										.updateConversation(conversation);
 									xmppService.sendMessage(message);
 									messageSent();
 								}
@@ -838,7 +912,7 @@ public class ConversationFragment extends Fragment {
 	}
 
 	public void showNoPGPKeyDialog(boolean plural,
-								   DialogInterface.OnClickListener listener) {
+			DialogInterface.OnClickListener listener) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
 		builder.setIconAttribute(android.R.attr.alertDialogIcon);
 		if (plural) {
diff --git a/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java b/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
index 8fad66cf..ea45b75e 100644
--- a/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java
@@ -19,6 +19,7 @@ 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;
 
@@ -28,13 +29,12 @@ import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.utils.UIHelper;
-import eu.siacs.conversations.utils.Validator;
 import eu.siacs.conversations.xmpp.XmppConnection.Features;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 import eu.siacs.conversations.xmpp.pep.Avatar;
 
-public class EditAccountActivity extends XmppActivity implements OnAccountUpdate {
+public class EditAccountActivity extends XmppActivity implements OnAccountUpdate{
 
 	private AutoCompleteTextView mAccountJid;
 	private EditText mPassword;
@@ -42,10 +42,15 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	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;
@@ -58,22 +63,16 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 
 	private boolean mFetchingAvatar = false;
 
-	private OnClickListener mSaveButtonClickListener = new OnClickListener() {
+	private final OnClickListener mSaveButtonClickListener = new OnClickListener() {
 
 		@Override
-		public void onClick(View v) {
-			if (mAccount != null
-					&& mAccount.getStatus() == Account.State.DISABLED) {
+		public void onClick(final View v) {
+			if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
 				mAccount.setOption(Account.OPTION_DISABLED, false);
 				xmppConnectionService.updateAccount(mAccount);
 				return;
 			}
-			if (!Validator.isValidJid(mAccountJid.getText().toString())) {
-				mAccountJid.setError(getString(R.string.invalid_jid));
-				mAccountJid.requestFocus();
-				return;
-			}
-			boolean registerNewAccount = mRegisterNew.isChecked();
+			final boolean registerNewAccount = mRegisterNew.isChecked();
 			final Jid jid;
 			try {
 				jid = Jid.fromString(mAccountJid.getText().toString());
@@ -82,37 +81,41 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				mAccountJid.requestFocus();
 				return;
 			}
-			String password = mPassword.getText().toString();
-			String passwordConfirm = mPasswordConfirm.getText().toString();
+			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.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;
+				}
 				mAccount.setPassword(password);
-                try {
-                    mAccount.setUsername(jid.hasLocalpart() ? jid.getLocalpart() : "");
-                    mAccount.setServer(jid.getDomainpart());
-                } catch (final InvalidJidException ignored) {
-                }
 				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 (InvalidJidException e) {
-                    return;
-                }
-                mAccount = new Account(jid.toBareJid(), password);
+				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);
@@ -127,82 +130,81 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 
 		}
 	};
-	private OnClickListener mCancelButtonClickListener = new OnClickListener() {
+	private final OnClickListener mCancelButtonClickListener = new OnClickListener() {
 
 		@Override
-		public void onClick(View v) {
+		public void onClick(final View v) {
 			finish();
 		}
 	};
-		@Override
-		public void onAccountUpdate() {
-			runOnUiThread(new Runnable() {
-
-				@Override
-				public void run() {
-					if (mAccount != null
-							&& mAccount.getStatus() != Account.State.ONLINE
-							&& mFetchingAvatar) {
-						startActivity(new Intent(getApplicationContext(),
+	@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();
+					finish();
+				} else if (jidToEdit == null && mAccount != null
+						&& mAccount.getStatus() == Account.State.ONLINE) {
+					if (!mFetchingAvatar) {
+						mFetchingAvatar = true;
+						xmppConnectionService.checkForAvatar(mAccount,
+								mAvatarFetchCallback);
 					}
+				} else {
+					updateSaveButton();
 				}
-			});
-		}
-	private UiCallback<Avatar> mAvatarFetchCallback = new UiCallback<Avatar>() {
+				if (mAccount != null) {
+					updateAccountInformation();
+				}
+			}
+		});
+	}
+	private final UiCallback<Avatar> mAvatarFetchCallback = new UiCallback<Avatar>() {
 
 		@Override
-		public void userInputRequried(PendingIntent pi, Avatar avatar) {
+		public void userInputRequried(final PendingIntent pi, final Avatar avatar) {
 			finishInitialSetup(avatar);
 		}
 
 		@Override
-		public void success(Avatar avatar) {
+		public void success(final Avatar avatar) {
 			finishInitialSetup(avatar);
 		}
 
 		@Override
-		public void error(int errorCode, Avatar avatar) {
+		public void error(final int errorCode, final Avatar avatar) {
 			finishInitialSetup(avatar);
 		}
 	};
-    private TextWatcher mTextWatcher = new TextWatcher() {
+	private final TextWatcher mTextWatcher = new TextWatcher() {
 
 		@Override
-		public void onTextChanged(CharSequence s, int start, int before,
-								  int count) {
+		public void onTextChanged(final CharSequence s, final int start, final int before, final int count) {
 			updateSaveButton();
 		}
 
 		@Override
-		public void beforeTextChanged(CharSequence s, int start, int count,
-									  int after) {
-
+		public void beforeTextChanged(final CharSequence s, final int start, final int count, final int after) {
 		}
 
 		@Override
-		public void afterTextChanged(Editable s) {
+		public void afterTextChanged(final Editable s) {
 
 		}
 	};
-	private OnClickListener mAvatarClickListener = new OnClickListener() {
+
+	private final OnClickListener mAvatarClickListener = new OnClickListener() {
 		@Override
-		public void onClick(View view) {
-			if (mAccount!=null) {
-				Intent intent = new Intent(getApplicationContext(),
+		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);
@@ -215,7 +217,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 
 			@Override
 			public void run() {
-				Intent intent;
+				final Intent intent;
 				if (avatar != null) {
 					intent = new Intent(getApplicationContext(),
 							StartConversationActivity.class);
@@ -232,13 +234,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	protected void updateSaveButton() {
-		if (mAccount != null
-				&& mAccount.getStatus() == Account.State.CONNECTING) {
+		if (mAccount != null && mAccount.getStatus() == Account.State.CONNECTING) {
 			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) {
+		} else if (mAccount != null && mAccount.getStatus() == Account.State.DISABLED) {
 			this.mSaveButton.setEnabled(true);
 			this.mSaveButton.setTextColor(getPrimaryTextColor());
 			this.mSaveButton.setText(R.string.enable);
@@ -246,8 +246,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			this.mSaveButton.setEnabled(true);
 			this.mSaveButton.setTextColor(getPrimaryTextColor());
 			if (jidToEdit != null) {
-				if (mAccount != null
-						&& mAccount.getStatus() == Account.State.ONLINE) {
+				if (mAccount != null && mAccount.isOnlineAndConnected()) {
 					this.mSaveButton.setText(R.string.save);
 					if (!accountInfoEdited()) {
 						this.mSaveButton.setEnabled(false);
@@ -263,10 +262,10 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	protected boolean accountInfoEdited() {
-		return (!this.mAccount.getJid().toBareJid().equals(
-				this.mAccountJid.getText().toString()))
-				|| (!this.mAccount.getPassword().equals(
-				this.mPassword.getText().toString()));
+		return (!this.mAccount.getJid().toBareJid().toString().equals(
+					this.mAccountJid.getText().toString()))
+			|| (!this.mAccount.getPassword().equals(
+						this.mPassword.getText().toString()));
 	}
 
 	@Override
@@ -279,7 +278,7 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	}
 
 	@Override
-	protected void onCreate(Bundle savedInstanceState) {
+	protected void onCreate(final Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_edit_account);
 		this.mAccountJid = (AutoCompleteTextView) findViewById(R.id.account_jid);
@@ -292,7 +291,11 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		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);
@@ -302,29 +305,41 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		this.mCancelButton = (Button) findViewById(R.id.cancel_button);
 		this.mSaveButton.setOnClickListener(this.mSaveButtonClickListener);
 		this.mCancelButton.setOnClickListener(this.mCancelButtonClickListener);
-		this.mRegisterNew
-				.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
-					@Override
-					public void onCheckedChanged(CompoundButton buttonView,
-												 boolean isChecked) {
-						if (isChecked) {
-							mPasswordConfirm.setVisibility(View.VISIBLE);
-						} else {
-							mPasswordConfirm.setVisibility(View.GONE);
-						}
-						updateSaveButton();
-					}
-				});
+		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(Menu menu) {
+	public boolean onCreateOptionsMenu(final Menu menu) {
 		super.onCreateOptionsMenu(menu);
 		getMenuInflater().inflate(R.menu.editaccount, menu);
-		MenuItem showQrCode = menu.findItem(R.id.action_show_qr_code);
+		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) {
 			showQrCode.setVisible(false);
+			showBlocklist.setVisible(false);
+			showMoreInfo.setVisible(false);
+			changePassword.setVisible(false);
+		} else if (mAccount.getStatus() != Account.State.ONLINE) {
+			showBlocklist.setVisible(false);
+			showMoreInfo.setVisible(false);
+			changePassword.setVisible(false);
+		} else if (!mAccount.getXmppConnection().getFeatures().blocking()) {
+			showBlocklist.setVisible(false);
 		}
 		return true;
 	}
@@ -333,32 +348,38 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 	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) {
+			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);
-				getActionBar().setTitle(getString(R.string.account_details));
+				if (getActionBar() != null) {
+					getActionBar().setTitle(getString(R.string.account_details));
+				}
 			} else {
 				this.mAvatar.setVisibility(View.GONE);
-				getActionBar().setTitle(R.string.action_add_account);
+				if (getActionBar() != null) {
+					getActionBar().setTitle(R.string.action_add_account);
+				}
 			}
 		}
 	}
 
 	@Override
 	protected void onBackendConnected() {
-        KnownHostsAdapter mKnownHostsAdapter = new KnownHostsAdapter(this,
-                android.R.layout.simple_list_item_1,
-                xmppConnectionService.getKnownHosts());
+		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) {
-			getActionBar().setDisplayHomeAsUpEnabled(false);
-			getActionBar().setDisplayShowHomeEnabled(false);
+			if (getActionBar() != null) {
+				getActionBar().setDisplayHomeAsUpEnabled(false);
+				getActionBar().setDisplayShowHomeEnabled(false);
+			}
 			this.mCancelButton.setEnabled(false);
 			this.mCancelButton.setTextColor(getSecondaryTextColor());
 		}
@@ -366,6 +387,27 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 		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());
@@ -381,18 +423,36 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 			this.mRegisterNew.setVisibility(View.GONE);
 			this.mRegisterNew.setChecked(false);
 		}
-		if (this.mAccount.getStatus() == Account.State.ONLINE
-				&& !this.mFetchingAvatar) {
+		if (this.mAccount.isOnlineAndConnected() && !this.mFetchingAvatar) {
 			this.mStats.setVisibility(View.VISIBLE);
-			this.mSessionEst.setText(UIHelper.readableTimeDifferenceFull(
-					getApplicationContext(), this.mAccount.getXmppConnection()
-							.getLastSessionEstablished()));
+			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);
+					.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);
@@ -409,21 +469,21 @@ public class EditAccountActivity extends XmppActivity implements OnAccountUpdate
 				this.mOtrFingerprintBox.setVisibility(View.VISIBLE);
 				this.mOtrFingerprint.setText(CryptoHelper.prettifyFingerprint(fingerprint));
 				this.mOtrFingerprintToClipboardButton
-						.setVisibility(View.VISIBLE);
+					.setVisibility(View.VISIBLE);
 				this.mOtrFingerprintToClipboardButton
-						.setOnClickListener(new View.OnClickListener() {
+					.setOnClickListener(new View.OnClickListener() {
 
-							@Override
-							public void onClick(View v) {
+						@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();
-								}
+							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);
 			}
diff --git a/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java b/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
index 906a16cc..b3ab5ee6 100644
--- a/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ManageAccountActivity.java
@@ -26,21 +26,25 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 
 	protected Account selectedAccount = null;
 
-	protected List<Account> accountList = new ArrayList<Account>();
+	protected final List<Account> accountList = new ArrayList<>();
 	protected ListView accountListView;
 	protected AccountAdapter mAccountAdapter;
-		@Override
-		public void onAccountUpdate() {
+
+	@Override
+	public void onAccountUpdate() {
+		synchronized (this.accountList) {
 			accountList.clear();
 			accountList.addAll(xmppConnectionService.getAccounts());
-			runOnUiThread(new Runnable() {
-
-				@Override
-				public void run() {
-					mAccountAdapter.notifyDataSetChanged();
-				}
-			});
 		}
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				invalidateOptionsMenu();
+				mAccountAdapter.notifyDataSetChanged();
+			}
+		});
+	}
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
@@ -91,6 +95,14 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 	@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;
 	}
 
@@ -120,12 +132,18 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
-		case R.id.action_add_account:
-			startActivity(new Intent(getApplicationContext(),
-					EditAccountActivity.class));
-			break;
-		default:
-			break;
+			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);
 	}
@@ -158,6 +176,56 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 		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);
diff --git a/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java b/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
index 609dc280..5e770376 100644
--- a/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ShareWithActivity.java
@@ -1,17 +1,5 @@
 package eu.siacs.conversations.ui;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import eu.siacs.conversations.Config;
-import eu.siacs.conversations.R;
-import eu.siacs.conversations.entities.Account;
-import eu.siacs.conversations.entities.Conversation;
-import eu.siacs.conversations.entities.Message;
-import eu.siacs.conversations.ui.adapter.ConversationAdapter;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
-import eu.siacs.conversations.xmpp.jid.Jid;
-
 import android.app.PendingIntent;
 import android.content.Intent;
 import android.net.Uri;
@@ -25,10 +13,27 @@ import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
 import android.widget.Toast;
 
+import java.io.UnsupportedEncodingException;
+import java.net.URLConnection;
+import java.net.URLDecoder;
+import java.nio.charset.UnsupportedCharsetException;
+import java.util.ArrayList;
+import java.util.List;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.ui.adapter.ConversationAdapter;
+import eu.siacs.conversations.xmpp.jid.InvalidJidException;
+import eu.siacs.conversations.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;
@@ -38,9 +43,9 @@ public class ShareWithActivity extends XmppActivity {
 
 	private static final int REQUEST_START_NEW_CONVERSATION = 0x0501;
 	private ListView mListView;
-	private List<Conversation> mConversations = new ArrayList<Conversation>();
+	private List<Conversation> mConversations = new ArrayList<>();
 
-	private UiCallback<Message> attachImageCallback = new UiCallback<Message>() {
+	private UiCallback<Message> attachFileCallback = new UiCallback<Message>() {
 
 		@Override
 		public void userInputRequried(PendingIntent pi, Message object) {
@@ -78,11 +83,12 @@ public class ShareWithActivity extends XmppActivity {
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
-
 		super.onCreate(savedInstanceState);
 
-		getActionBar().setDisplayHomeAsUpEnabled(false);
-		getActionBar().setHomeButtonEnabled(false);
+		if (getActionBar() != null) {
+			getActionBar().setDisplayHomeAsUpEnabled(false);
+			getActionBar().setHomeButtonEnabled(false);
+		}
 
 		setContentView(R.layout.share_with);
 		setTitle(getString(R.string.title_activity_sharewith));
@@ -114,10 +120,10 @@ public class ShareWithActivity extends XmppActivity {
 	}
 
 	@Override
-	public boolean onOptionsItemSelected(MenuItem item) {
+	public boolean onOptionsItemSelected(final MenuItem item) {
 		switch (item.getItemId()) {
 		case R.id.action_add:
-			Intent intent = new Intent(getApplicationContext(),
+			final Intent intent = new Intent(getApplicationContext(),
 					ChooseContactActivity.class);
 			startActivityForResult(intent, REQUEST_START_NEW_CONVERSATION);
 			return true;
@@ -127,16 +133,20 @@ public class ShareWithActivity extends XmppActivity {
 
 	@Override
 	public void onStart() {
-		if (getIntent().getType() != null
-				&& getIntent().getType().startsWith("image/")) {
-			this.share.uri = (Uri) getIntent().getParcelableExtra(
-					Intent.EXTRA_STREAM);
+		final String type = getIntent().getType();
+		if (type != null && !type.startsWith("text/")) {
+			this.share.uri = (Uri) getIntent().getParcelableExtra(Intent.EXTRA_STREAM);
+			try {
+				this.share.image = type.startsWith("image/")
+						|| URLConnection.guessContentTypeFromName(this.share.uri.toString()).startsWith("image/");
+			} catch (final StringIndexOutOfBoundsException ignored) {
+				this.share.image = false;
+			}
 		} else {
 			this.share.text = getIntent().getStringExtra(Intent.EXTRA_TEXT);
 		}
 		if (xmppConnectionServiceBound) {
-			xmppConnectionService.populateWithOrderedConversations(
-					mConversations, this.share.uri == null);
+			xmppConnectionService.populateWithOrderedConversations(mConversations, this.share.uri == null);
 		}
 		super.onStart();
 	}
@@ -177,12 +187,21 @@ public class ShareWithActivity extends XmppActivity {
 			selectPresence(conversation, new OnPresenceSelected() {
 				@Override
 				public void onPresenceSelected() {
-					Toast.makeText(getApplicationContext(),
-							getText(R.string.preparing_image),
-							Toast.LENGTH_LONG).show();
-					ShareWithActivity.this.xmppConnectionService
+					if (share.image) {
+						Toast.makeText(getApplicationContext(),
+								getText(R.string.preparing_image),
+								Toast.LENGTH_LONG).show();
+						ShareWithActivity.this.xmppConnectionService
 							.attachImageToConversation(conversation, share.uri,
-									attachImageCallback);
+									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();
 				}
@@ -195,4 +214,4 @@ public class ShareWithActivity extends XmppActivity {
 
 	}
 
-}
\ No newline at end of file
+}
diff --git a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
index c8b41821..209c0a7b 100644
--- a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
@@ -38,6 +38,7 @@ 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;
@@ -53,19 +54,20 @@ import java.util.List;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Bookmark;
 import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.ListItem;
-import eu.siacs.conversations.utils.XmppUri;
 import eu.siacs.conversations.services.XmppConnectionService.OnRosterUpdate;
 import eu.siacs.conversations.ui.adapter.KnownHostsAdapter;
 import eu.siacs.conversations.ui.adapter.ListItemAdapter;
-import eu.siacs.conversations.utils.Validator;
+import eu.siacs.conversations.utils.XmppUri;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
-public class StartConversationActivity extends XmppActivity implements OnRosterUpdate {
+public class StartConversationActivity extends XmppActivity implements OnRosterUpdate, OnUpdateBlocklist {
 
 	public int conference_context_id;
 	public int contact_context_id;
@@ -133,7 +135,9 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	private ViewPager.SimpleOnPageChangeListener mOnPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 		@Override
 		public void onPageSelected(int position) {
-			getActionBar().setSelectedNavigationItem(position);
+			if (getActionBar() != null) {
+				getActionBar().setSelectedNavigationItem(position);
+			}
 			onTabChanged();
 		}
 	};
@@ -146,16 +150,27 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 		@Override
 		public void beforeTextChanged(CharSequence s, int start, int count,
-									  int after) {
+				int after) {
 		}
 
 		@Override
 		public void onTextChanged(CharSequence s, int start, int before,
-								  int count) {
+				int count) {
 		}
 	};
 	private MenuItem mMenuSearchView;
 	private String mInitialJid;
+	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);
+			}
+		}
+	};
 
 	@Override
 	public void onRosterUpdate() {
@@ -179,9 +194,9 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
 
 		mContactsTab = actionBar.newTab().setText(R.string.contacts)
-				.setTabListener(mTabListener);
+			.setTabListener(mTabListener);
 		mConferencesTab = actionBar.newTab().setText(R.string.conferences)
-				.setTabListener(mTabListener);
+			.setTabListener(mTabListener);
 		actionBar.addTab(mContactsTab);
 		actionBar.addTab(mConferencesTab);
 
@@ -207,35 +222,36 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		mConferenceListFragment.setListAdapter(mConferenceAdapter);
 		mConferenceListFragment.setContextMenu(R.menu.conference_context);
 		mConferenceListFragment
-				.setOnListItemClickListener(new OnItemClickListener() {
+			.setOnListItemClickListener(new OnItemClickListener() {
 
-					@Override
-					public void onItemClick(AdapterView<?> arg0, View arg1,
-											int position, long arg3) {
-						openConversationForBookmark(position);
-					}
-				});
+				@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() {
+			.setOnListItemClickListener(new OnItemClickListener() {
 
-					@Override
-					public void onItemClick(AdapterView<?> arg0, View arg1,
-											int position, long arg3) {
-						openConversationForContact(position);
-					}
-				});
+				@Override
+				public void onItemClick(AdapterView<?> arg0, View arg1,
+						int position, long arg3) {
+					openConversationForContact(position);
+				}
+			});
 
 	}
 
 	protected void openConversationForContact(int position) {
 		Contact contact = (Contact) contacts.get(position);
 		Conversation conversation = xmppConnectionService
-				.findOrCreateConversation(contact.getAccount(),
-						contact.getJid(), false);
+			.findOrCreateConversation(contact.getAccount(),
+					contact.getJid(), false);
 		switchToConversation(conversation);
 	}
 
@@ -251,8 +267,8 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	protected void openConversationForBookmark(int position) {
 		Bookmark bookmark = (Bookmark) conferences.get(position);
 		Conversation conversation = xmppConnectionService
-				.findOrCreateConversation(bookmark.getAccount(),
-						bookmark.getJid(), true);
+			.findOrCreateConversation(bookmark.getAccount(),
+					bookmark.getJid(), true);
 		conversation.setBookmark(bookmark);
 		if (!conversation.getMucOptions().online()) {
 			xmppConnectionService.joinMuc(conversation);
@@ -270,14 +286,19 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		switchToContactDetails(contact);
 	}
 
+	protected void toggleContactBlock() {
+		final int position = contact_context_id;
+		BlockContactDialog.show(this, xmppConnectionService, (Contact)contacts.get(position));
+	}
+
 	protected void deleteContact() {
-		int position = contact_context_id;
+		final int position = contact_context_id;
 		final Contact contact = (Contact) contacts.get(position);
-		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		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()));
+					contact.getJid()));
 		builder.setPositiveButton(R.string.delete, new OnClickListener() {
 
 			@Override
@@ -287,7 +308,6 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 			}
 		});
 		builder.create().show();
-
 	}
 
 	protected void deleteConference() {
@@ -298,7 +318,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		builder.setNegativeButton(R.string.cancel, null);
 		builder.setTitle(R.string.delete_bookmark);
 		builder.setMessage(getString(R.string.remove_bookmark_text,
-				bookmark.getJid()));
+					bookmark.getJid()));
 		builder.setPositiveButton(R.string.delete, new OnClickListener() {
 
 			@Override
@@ -318,13 +338,10 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	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);
+		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));
+		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) {
@@ -344,41 +361,37 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 				new View.OnClickListener() {
 
 					@Override
-					public void onClick(View v) {
+					public void onClick(final View v) {
 						if (!xmppConnectionServiceBound) {
 							return;
 						}
-						if (Validator.isValidJid(jid.getText().toString())) {
-							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) {
-								return;
-							}
-							Account account = xmppConnectionService
-									.findAccountByJid(accountJid);
-							if (account == null) {
-								dialog.dismiss();
-								return;
-							}
-							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);
-							}
-						} else {
+						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);
 						}
 					}
 				});
@@ -386,22 +399,19 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 	}
 
 	@SuppressLint("InflateParams")
-	protected void showJoinConferenceDialog(String prefilledJid) {
-		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+	protected void showJoinConferenceDialog(final String prefilledJid) {
+		final AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.join_conference);
-		View dialogView = getLayoutInflater().inflate(
-				R.layout.join_conference_dialog, null);
+		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));
+		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 CheckBox bookmarkCheckBox = (CheckBox) dialogView
-				.findViewById(R.id.bookmark);
+		final Checkable bookmarkCheckBox = (CheckBox) dialogView
+			.findViewById(R.id.bookmark);
 		builder.setView(dialogView);
 		builder.setNegativeButton(R.string.cancel, null);
 		builder.setPositiveButton(R.string.join, null);
@@ -411,62 +421,59 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 				new View.OnClickListener() {
 
 					@Override
-					public void onClick(View v) {
+					public void onClick(final View v) {
 						if (!xmppConnectionServiceBound) {
 							return;
 						}
-						if (Validator.isValidJid(jid.getText().toString())) {
-							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) {
-								return; // TODO: Do some error handling...
-							}
-							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 {
-									Bookmark bookmark = new Bookmark(account,
-											conferenceJid);
-									bookmark.setAutojoin(true);
-									account.getBookmarks().add(bookmark);
-									xmppConnectionService
-											.pushBookmarks(account);
-									Conversation conversation = xmppConnectionService
-											.findOrCreateConversation(account,
-													conferenceJid, true);
-									conversation.setBookmark(bookmark);
-									if (!conversation.getMucOptions().online()) {
-										xmppConnectionService
-												.joinMuc(conversation);
-									}
-									dialog.dismiss();
-									switchToConversation(conversation);
-								}
+						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 {
-								Conversation conversation = xmppConnectionService
-										.findOrCreateConversation(account,
-												conferenceJid, true);
+								final Bookmark bookmark = new Bookmark(account,
+										conferenceJid);
+								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);
+									xmppConnectionService
+										.joinMuc(conversation);
 								}
 								dialog.dismiss();
 								switchToConversation(conversation);
 							}
 						} else {
-							jid.setError(getString(R.string.invalid_jid));
+							final Conversation conversation = xmppConnectionService
+								.findOrCreateConversation(account,
+										conferenceJid, true);
+							if (!conversation.getMucOptions().online()) {
+								xmppConnectionService.joinMuc(conversation);
+							}
+							dialog.dismiss();
+							switchToConversation(conversation);
 						}
 					}
 				});
@@ -474,8 +481,8 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	protected void switchToConversation(Contact contact) {
 		Conversation conversation = xmppConnectionService
-				.findOrCreateConversation(contact.getAccount(),
-						contact.getJid(), false);
+			.findOrCreateConversation(contact.getAccount(),
+					contact.getJid(), false);
 		switchToConversation(conversation);
 	}
 
@@ -491,14 +498,14 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		this.mOptionsMenu = menu;
 		getMenuInflater().inflate(R.menu.start_conversation, menu);
 		MenuItem menuCreateContact = menu
-				.findItem(R.id.action_create_contact);
+			.findItem(R.id.action_create_contact);
 		MenuItem menuCreateConference = menu
-				.findItem(R.id.action_join_conference);
+			.findItem(R.id.action_join_conference);
 		mMenuSearchView = menu.findItem(R.id.action_search);
 		mMenuSearchView.setOnActionExpandListener(mOnActionExpandListener);
 		View mSearchView = mMenuSearchView.getActionView();
 		mSearchEditText = (EditText) mSearchView
-				.findViewById(R.id.search_field);
+			.findViewById(R.id.search_field);
 		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
 		if (getActionBar().getSelectedNavigationIndex() == 0) {
 			menuCreateConference.setVisible(false);
@@ -567,7 +574,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		}
 		this.mKnownHosts = xmppConnectionService.getKnownHosts();
 		this.mKnownConferenceHosts = xmppConnectionService
-				.getKnownConferenceHosts();
+			.getKnownConferenceHosts();
 		if (this.mPendingInvite != null) {
 			mPendingInvite.invite();
 			this.mPendingInvite = null;
@@ -609,7 +616,7 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 											byte[] payload = record.getPayload();
 											if (payload[0] == 0) {
 												return new Invite(Uri.parse(new String(Arrays.copyOfRange(
-														payload, 1, payload.length)))).invite();
+																	payload, 1, payload.length)))).invite();
 											}
 										}
 									}
@@ -690,16 +697,29 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		invalidateOptionsMenu();
 	}
 
+	@Override
+	public void OnUpdateBlocklist(final Status status) {
+		runOnUiThread(new Runnable() {
+
+			@Override
+			public void run() {
+				if (mSearchEditText != null) {
+					filter(mSearchEditText.getText().toString());
+				}
+			}
+		});
+	}
+
 	public static class MyListFragment extends ListFragment {
 		private AdapterView.OnItemClickListener mOnItemClickListener;
 		private int mResContextMenu;
 
-		public void setContextMenu(int res) {
+		public void setContextMenu(final int res) {
 			this.mResContextMenu = res;
 		}
 
 		@Override
-		public void onListItemClick(ListView l, View v, int position, long id) {
+		public void onListItemClick(final ListView l, final View v, final int position, final long id) {
 			if (mOnItemClickListener != null) {
 				mOnItemClickListener.onItemClick(l, v, position, id);
 			}
@@ -710,28 +730,38 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 		}
 
 		@Override
-		public void onViewCreated(View view, Bundle savedInstanceState) {
+		public void onViewCreated(final View view, final Bundle savedInstanceState) {
 			super.onViewCreated(view, savedInstanceState);
 			registerForContextMenu(getListView());
 			getListView().setFastScrollEnabled(true);
 		}
 
 		@Override
-		public void onCreateContextMenu(ContextMenu menu, View v,
-										ContextMenuInfo menuInfo) {
+		public void onCreateContextMenu(final ContextMenu menu, final View v,
+				final ContextMenuInfo menuInfo) {
 			super.onCreateContextMenu(menu, v, menuInfo);
-			StartConversationActivity activity = (StartConversationActivity) getActivity();
+			final StartConversationActivity activity = (StartConversationActivity) getActivity();
 			activity.getMenuInflater().inflate(mResContextMenu, menu);
-			AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
+			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(MenuItem item) {
+		public boolean onContextItemSelected(final MenuItem item) {
 			StartConversationActivity activity = (StartConversationActivity) getActivity();
 			switch (item.getItemId()) {
 				case R.id.context_start_conversation:
@@ -740,6 +770,9 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 				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;
@@ -755,11 +788,11 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
 
 	private class Invite extends XmppUri {
 
-		public Invite(Uri uri) {
+		public Invite(final Uri uri) {
 			super(uri);
 		}
 
-		public Invite(String uri) {
+		public Invite(final String uri) {
 			super(uri);
 		}
 
diff --git a/src/main/java/eu/siacs/conversations/ui/TimePreference.java b/src/main/java/eu/siacs/conversations/ui/TimePreference.java
new file mode 100644
index 00000000..e32b068c
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/ui/TimePreference.java
@@ -0,0 +1,105 @@
+package eu.siacs.conversations.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/eu/siacs/conversations/ui/VerifyOTRActivity.java b/src/main/java/eu/siacs/conversations/ui/VerifyOTRActivity.java
index e5775ab0..c33decd8 100644
--- a/src/main/java/eu/siacs/conversations/ui/VerifyOTRActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/VerifyOTRActivity.java
@@ -1,15 +1,15 @@
 package eu.siacs.conversations.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.MenuItem;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
-import android.widget.RelativeLayout;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -32,57 +32,56 @@ import eu.siacs.conversations.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 RelativeLayout mVerificationAreaOne;
-	private RelativeLayout mVerificationAreaTwo;
-	private TextView mErrorNoSession;
-	private TextView mRemoteJid;
+	private LinearLayout mManualVerificationArea;
+	private LinearLayout mSmpVerificationArea;
 	private TextView mRemoteFingerprint;
 	private TextView mYourFingerprint;
-	private EditText mSharedSecretHint;
-	private EditText mSharedSecretSecret;
-	private Button mButtonScanQrCode;
-	private Button mButtonShowQrCode;
-	private Button mButtonSharedSecretPositive;
-	private Button mButtonSharedSecretNegative;
+	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();
-			updateView();
 			xmppConnectionService.syncRosterToDisk(mConversation.getAccount());
+			Toast.makeText(VerifyOTRActivity.this,R.string.verified,Toast.LENGTH_SHORT).show();
+			finish();
 		}
 	};
 
-	private View.OnClickListener mShowQrCodeListener = new View.OnClickListener() {
-		@Override
-		public void onClick(final View view) {
-			showQrCode();
-		}
-	};
-
-	private View.OnClickListener mScanQrCodeListener = new View.OnClickListener() {
-
-		@Override
-		public void onClick(View view) {
-			new IntentIntegrator(VerifyOTRActivity.this).initiateScan();
-		}
-
-	};
-
 	private View.OnClickListener mCreateSharedSecretListener = new View.OnClickListener() {
 		@Override
 		public void onClick(final View view) {
 			if (isAccountOnline()) {
-				final String question = mSharedSecretHint.getText().toString();
+				final String question = mSharedSecretHintEditable.getText().toString();
 				final String secret = mSharedSecretSecret.getText().toString();
-				initSmp(question, secret);
-				updateView();
+				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();
+				}
 			}
 		}
 	};
@@ -100,7 +99,7 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 		@Override
 		public void onClick(View view) {
 			if (isAccountOnline()) {
-				final String question = mSharedSecretHint.getText().toString();
+				final String question = mSharedSecretHintEditable.getText().toString();
 				final String secret = mSharedSecretSecret.getText().toString();
 				respondSmp(question, secret);
 				updateView();
@@ -124,14 +123,14 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 		}
 	};
 
-	private XmppUri mPendingUri = null;
-
 	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;
@@ -172,15 +171,17 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 		}
 	}
 
-	protected void verifyWithUri(XmppUri uri) {
+	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;
 		}
 	}
 
@@ -194,7 +195,7 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 	}
 
 	protected boolean handleIntent(Intent intent) {
-		if (intent.getAction().equals(ACTION_VERIFY_CONTACT)) {
+		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) {
@@ -208,6 +209,11 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 			} 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;
@@ -223,9 +229,12 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 				XmppUri uri = new XmppUri(data);
 				if (xmppConnectionServiceBound) {
 					verifyWithUri(uri);
+					finish();
 				} else {
 					this.mPendingUri = uri;
 				}
+			} else {
+				finish();
 			}
 		}
 		super.onActivityResult(requestCode, requestCode, intent);
@@ -234,84 +243,139 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 	@Override
 	protected void onBackendConnected() {
 		if (handleIntent(getIntent())) {
-			if (mPendingUri!=null) {
-				verifyWithUri(mPendingUri);
-				mPendingUri = null;
-			}
 			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();
-			this.mVerificationAreaOne.setVisibility(View.VISIBLE);
-			this.mVerificationAreaTwo.setVisibility(View.VISIBLE);
-			this.mErrorNoSession.setVisibility(View.GONE);
-			this.mYourFingerprint.setText(CryptoHelper.prettifyFingerprint(this.mAccount.getOtrFingerprint()));
-			this.mRemoteFingerprint.setText(this.mConversation.getOtrFingerprint());
-			this.mRemoteJid.setText(this.mConversation.getContact().getJid().toBareJid().toString());
-			Conversation.Smp smp = mConversation.smp();
-			Session session = mConversation.getOtrSession();
-			if (mConversation.isOtrFingerprintVerified()) {
-				deactivateButton(mButtonScanQrCode, R.string.verified);
-			} else {
-				activateButton(mButtonScanQrCode, R.string.scan_qr_code, mScanQrCodeListener);
+			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;
 			}
-			if (smp.status == Conversation.Smp.STATUS_NONE) {
-				activateButton(mButtonSharedSecretPositive, R.string.create, mCreateSharedSecretListener);
-				deactivateButton(mButtonSharedSecretNegative, R.string.cancel);
-				this.mSharedSecretHint.setFocusableInTouchMode(true);
-				this.mSharedSecretSecret.setFocusableInTouchMode(true);
-				this.mSharedSecretSecret.setText("");
-				this.mSharedSecretHint.setText("");
-				this.mSharedSecretHint.setVisibility(View.VISIBLE);
-				this.mSharedSecretSecret.setVisibility(View.VISIBLE);
+		} 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);
-			} else if (smp.status == Conversation.Smp.STATUS_CONTACT_REQUESTED) {
-				this.mSharedSecretHint.setFocusable(false);
-				this.mSharedSecretHint.setText(smp.hint);
-				this.mSharedSecretSecret.setFocusableInTouchMode(true);
-				this.mSharedSecretHint.setVisibility(View.VISIBLE);
+				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);
-				deactivateButton(mButtonSharedSecretNegative, R.string.cancel);
-				activateButton(mButtonSharedSecretPositive, R.string.respond, mRespondSharedSecretListener);
-			} else if (smp.status == Conversation.Smp.STATUS_FAILED) {
-				activateButton(mButtonSharedSecretNegative, R.string.cancel, mFinishListener);
-				activateButton(mButtonSharedSecretPositive, R.string.try_again, mRetrySharedSecretListener);
-				this.mSharedSecretHint.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.mStatusMessage.setText(R.string.secrets_do_not_match);
-				this.mStatusMessage.setTextColor(getWarningTextColor());
-			} else if (smp.status == Conversation.Smp.STATUS_FINISHED) {
-				this.mSharedSecretHint.setText("");
+				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.mStatusMessage.setTextColor(getPrimaryColor());
-				deactivateButton(mButtonSharedSecretNegative, R.string.cancel);
-				if (mConversation.isOtrFingerprintVerified()) {
-					activateButton(mButtonSharedSecretPositive, R.string.finish, mFinishListener);
-					this.mStatusMessage.setText(R.string.verified);
-				} else {
-					activateButton(mButtonSharedSecretPositive,R.string.reset,mRetrySharedSecretListener);
-					this.mStatusMessage.setText(R.string.secret_accepted);
-				}
-			} else if (session != null && session.isSmpInProgress()) {
-				deactivateButton(mButtonSharedSecretPositive, R.string.in_progress);
-				activateButton(mButtonSharedSecretNegative, R.string.cancel, mCancelSharedSecretListener);
-				this.mSharedSecretHint.setVisibility(View.VISIBLE);
-				this.mSharedSecretSecret.setVisibility(View.VISIBLE);
-				this.mSharedSecretHint.setFocusable(false);
-				this.mSharedSecretSecret.setFocusable(false);
-			}
-		} else {
-			this.mVerificationAreaOne.setVisibility(View.GONE);
-			this.mVerificationAreaTwo.setVisibility(View.GONE);
-			this.mErrorNoSession.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;
 		}
 	}
 
@@ -334,41 +398,25 @@ public class VerifyOTRActivity extends XmppActivity implements XmppConnectionSer
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_verify_otr);
 		this.mRemoteFingerprint = (TextView) findViewById(R.id.remote_fingerprint);
-		this.mRemoteJid = (TextView) findViewById(R.id.remote_jid);
 		this.mYourFingerprint = (TextView) findViewById(R.id.your_fingerprint);
-		this.mButtonSharedSecretNegative = (Button) findViewById(R.id.button_shared_secret_negative);
-		this.mButtonSharedSecretPositive = (Button) findViewById(R.id.button_shared_secret_positive);
-		this.mButtonScanQrCode = (Button) findViewById(R.id.button_scan_qr_code);
-		this.mButtonShowQrCode = (Button) findViewById(R.id.button_show_qr_code);
-		this.mButtonShowQrCode.setOnClickListener(this.mShowQrCodeListener);
+		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.mSharedSecretHint = (EditText) findViewById(R.id.shared_secret_hint);
-		this.mStatusMessage= (TextView) findViewById(R.id.status_message);
-		this.mVerificationAreaOne = (RelativeLayout) findViewById(R.id.verification_area_one);
-		this.mVerificationAreaTwo = (RelativeLayout) findViewById(R.id.verification_area_two);
-		this.mErrorNoSession = (TextView) findViewById(R.id.error_no_session);
+		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(Menu menu) {
+	public boolean onCreateOptionsMenu(final Menu menu) {
+		super.onCreateOptionsMenu(menu);
 		getMenuInflater().inflate(R.menu.verify_otr, menu);
-		if (mConversation != null && mConversation.isOtrFingerprintVerified()) {
-			MenuItem manuallyVerifyItem = menu.findItem(R.id.manually_verify);
-			manuallyVerifyItem.setVisible(false);
-		}
 		return true;
 	}
 
-	@Override
-	public boolean onOptionsItemSelected(MenuItem menuItem) {
-		if (menuItem.getItemId() == R.id.manually_verify) {
-			showManuallyVerifyDialog();
-			return true;
-		} else {
-			return super.onOptionsItemSelected(menuItem);
-		}
-	}
-
 	private void showManuallyVerifyDialog() {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(R.string.manually_verify);
diff --git a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
index 5fba1664..69dd47e7 100644
--- a/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/XmppActivity.java
@@ -71,6 +71,7 @@ import eu.siacs.conversations.services.AvatarService;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
 import eu.siacs.conversations.utils.ExceptionHelper;
+import eu.siacs.conversations.xmpp.OnUpdateBlocklist;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
@@ -94,6 +95,7 @@ public abstract class XmppActivity extends Activity {
 	protected boolean mUseSubject = true;
 
 	private DisplayMetrics metrics;
+	protected int mTheme;
 
 	protected interface OnValueEdited {
 		public void onValueEdited(String value);
@@ -198,7 +200,7 @@ public abstract class XmppActivity extends Activity {
 							xmppConnectionServiceBound = false;
 						}
 						stopService(new Intent(XmppActivity.this,
-								XmppConnectionService.class));
+									XmppConnectionService.class));
 						finish();
 					}
 				});
@@ -208,13 +210,13 @@ public abstract class XmppActivity extends Activity {
 					@Override
 					public void onClick(DialogInterface dialog, int which) {
 						Uri uri = Uri
-								.parse("market://details?id=org.sufficientlysecure.keychain");
+							.parse("market://details?id=org.sufficientlysecure.keychain");
 						Intent marketIntent = new Intent(Intent.ACTION_VIEW,
 								uri);
 						PackageManager manager = getApplicationContext()
-								.getPackageManager();
+							.getPackageManager();
 						List<ResolveInfo> infos = manager
-								.queryIntentActivities(marketIntent, 0);
+							.queryIntentActivities(marketIntent, 0);
 						if (infos.size() > 0) {
 							startActivity(marketIntent);
 						} else {
@@ -244,6 +246,9 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 			this.xmppConnectionService.setOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
 		}
+		if (this instanceof OnUpdateBlocklist) {
+			this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
+		}
 	}
 
 	protected void unregisterListeners() {
@@ -259,9 +264,13 @@ public abstract class XmppActivity extends Activity {
 		if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
 			this.xmppConnectionService.removeOnMucRosterUpdateListener();
 		}
+		if (this instanceof OnUpdateBlocklist) {
+			this.xmppConnectionService.removeOnUpdateBlocklistListener();
+		}
 	}
 
-	public boolean onOptionsItemSelected(MenuItem item) {
+	@Override
+	public boolean onOptionsItemSelected(final MenuItem item) {
 		switch (item.getItemId()) {
 			case R.id.action_settings:
 				startActivity(new Intent(this, SettingsActivity.class));
@@ -292,15 +301,14 @@ public abstract class XmppActivity extends Activity {
 		mPrimaryColor = getResources().getColor(R.color.primary);
 		mSecondaryBackgroundColor = getResources().getColor(
 				R.color.secondarybackground);
-		if (getPreferences().getBoolean("use_larger_font", false)) {
-			setTheme(R.style.ConversationsTheme_LargerText);
-		}
+		this.mTheme = findTheme();
+		setTheme(this.mTheme);
 		mUseSubject = getPreferences().getBoolean("use_subject", true);
 	}
 
 	protected SharedPreferences getPreferences() {
 		return PreferenceManager
-				.getDefaultSharedPreferences(getApplicationContext());
+			.getDefaultSharedPreferences(getApplicationContext());
 	}
 
 	public boolean useSubjectToIdentifyConference() {
@@ -312,7 +320,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	public void switchToConversation(Conversation conversation, String text,
-									 boolean newTask) {
+			boolean newTask) {
 		switchToConversation(conversation,text,null,newTask);
 	}
 
@@ -372,7 +380,7 @@ public abstract class XmppActivity extends Activity {
 
 					@Override
 					public void userInputRequried(PendingIntent pi,
-												  Account account) {
+							Account account) {
 						try {
 							startIntentSenderForResult(pi.getIntentSender(),
 									REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
@@ -383,15 +391,15 @@ public abstract class XmppActivity extends Activity {
 					@Override
 					public void success(Account account) {
 						xmppConnectionService.databaseBackend
-								.updateAccount(account);
+							.updateAccount(account);
 						xmppConnectionService.sendPresencePacket(account,
 								xmppConnectionService.getPresenceGenerator()
-										.sendPresence(account));
+								.sendPresence(account));
 						if (conversation != null) {
 							conversation
-									.setNextEncryption(Message.ENCRYPTION_PGP);
+								.setNextEncryption(Message.ENCRYPTION_PGP);
 							xmppConnectionService.databaseBackend
-									.updateConversation(conversation);
+								.updateConversation(conversation);
 						}
 					}
 
@@ -420,7 +428,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	protected void showAddToRosterDialog(final Conversation conversation) {
-		final Jid jid = conversation.getContactJid();
+		final Jid jid = conversation.getJid();
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(jid.toString());
 		builder.setMessage(getString(R.string.not_in_roster));
@@ -430,7 +438,7 @@ public abstract class XmppActivity extends Activity {
 
 					@Override
 					public void onClick(DialogInterface dialog, int which) {
-						final Jid jid = conversation.getContactJid();
+						final Jid jid = conversation.getJid();
 						Account account = conversation.getAccount();
 						Contact contact = account.getRoster().getContact(jid);
 						xmppConnectionService.createContact(contact);
@@ -462,7 +470,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	private void warnMutalPresenceSubscription(final Conversation conversation,
-											   final OnPresenceSelected listener) {
+			final OnPresenceSelected listener) {
 		AlertDialog.Builder builder = new AlertDialog.Builder(this);
 		builder.setTitle(conversation.getContact().getJid().toString());
 		builder.setMessage(R.string.without_mutual_presence_updates);
@@ -485,13 +493,13 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	protected void quickPasswordEdit(String previousValue,
-									 OnValueEdited callback) {
+			OnValueEdited callback) {
 		quickEdit(previousValue, callback, true);
 	}
 
 	@SuppressLint("InflateParams")
 	private void quickEdit(final String previousValue,
-						   final OnValueEdited callback, boolean password) {
+			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);
@@ -521,7 +529,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	public void selectPresence(final Conversation conversation,
-							   final OnPresenceSelected listener) {
+			final OnPresenceSelected listener) {
 		final Contact contact = conversation.getContact();
 		if (conversation.hasValidOtrSession()) {
 			SessionID id = conversation.getOtrSession().getSessionID();
@@ -576,7 +584,7 @@ public abstract class XmppActivity extends Activity {
 
 							@Override
 							public void onClick(DialogInterface dialog,
-												int which) {
+									int which) {
 								presence.delete(0, presence.length());
 								presence.append(presencesArray[which]);
 							}
@@ -600,7 +608,7 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	protected void onActivityResult(int requestCode, int resultCode,
-									final Intent data) {
+			final Intent data) {
 		super.onActivityResult(requestCode, resultCode, data);
 		if (requestCode == REQUEST_INVITE_TO_CONVERSATION
 				&& resultCode == RESULT_OK) {
@@ -608,19 +616,19 @@ public abstract class XmppActivity extends Activity {
 				Jid jid = Jid.fromString(data.getStringExtra("contact"));
 				String conversationUuid = data.getStringExtra("conversation");
 				Conversation conversation = xmppConnectionService
-						.findConversationByUuid(conversationUuid);
+					.findConversationByUuid(conversationUuid);
 				if (conversation.getMode() == Conversation.MODE_MULTI) {
 					xmppConnectionService.invite(conversation, jid);
 				} else {
 					List<Jid> jids = new ArrayList<Jid>();
-					jids.add(conversation.getContactJid().toBareJid());
+					jids.add(conversation.getJid().toBareJid());
 					jids.add(jid);
 					xmppConnectionService.createAdhocConference(conversation.getAccount(), jids, adhocCallback);
 				}
 			} catch (final InvalidJidException ignored) {
 
 			}
-		}
+				}
 	}
 
 	private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
@@ -688,18 +696,18 @@ public abstract class XmppActivity extends Activity {
 	}
 
 	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);
-			}
+		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() {
@@ -721,6 +729,14 @@ public abstract class XmppActivity extends Activity {
 		}
 	}
 
+	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();
@@ -823,13 +839,13 @@ public abstract class XmppActivity extends Activity {
 				try {
 					task.execute(message);
 				} catch (final RejectedExecutionException ignored) {
-                }
+				}
 			}
 		}
 	}
 
 	public static boolean cancelPotentialWork(Message message,
-											  ImageView imageView) {
+			ImageView imageView) {
 		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
 
 		if (bitmapWorkerTask != null) {
@@ -858,7 +874,7 @@ public abstract class XmppActivity extends Activity {
 		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
 
 		public AsyncDrawable(Resources res, Bitmap bitmap,
-							 BitmapWorkerTask bitmapWorkerTask) {
+				BitmapWorkerTask bitmapWorkerTask) {
 			super(res, bitmap);
 			bitmapWorkerTaskReference = new WeakReference<>(
 					bitmapWorkerTask);
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
index c5ee9ba6..32f95431 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
@@ -2,7 +2,6 @@ package eu.siacs.conversations.ui.adapter;
 
 import java.util.List;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Downloadable;
@@ -35,7 +34,7 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 	public View getView(int position, View view, ViewGroup parent) {
 		if (view == null) {
 			LayoutInflater inflater = (LayoutInflater) activity
-					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 			view = inflater.inflate(R.layout.conversation_list_row,
 					parent, false);
 		}
@@ -54,19 +53,19 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			}
 		}
 		TextView convName = (TextView) view
-				.findViewById(R.id.conversation_name);
+			.findViewById(R.id.conversation_name);
 		if (conversation.getMode() == Conversation.MODE_SINGLE
 				|| activity.useSubjectToIdentifyConference()) {
 			convName.setText(conversation.getName());
 		} else {
-			convName.setText(conversation.getContactJid().toBareJid().toString());
+			convName.setText(conversation.getJid().toBareJid().toString());
 		}
 		TextView mLastMessage = (TextView) view
-				.findViewById(R.id.conversation_lastmsg);
+			.findViewById(R.id.conversation_lastmsg);
 		TextView mTimestamp = (TextView) view
-				.findViewById(R.id.conversation_lastupdate);
+			.findViewById(R.id.conversation_lastupdate);
 		ImageView imagePreview = (ImageView) view
-				.findViewById(R.id.conversation_lastimage);
+			.findViewById(R.id.conversation_lastimage);
 
 		Message message = conversation.getLatestMessage();
 
@@ -154,12 +153,12 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 			imagePreview.setVisibility(View.GONE);
 		}
 		mTimestamp.setText(UIHelper.readableTimeDifference(getContext(),
-				conversation.getLatestMessage().getTimeSent()));
+					conversation.getLatestMessage().getTimeSent()));
 
 		ImageView profilePicture = (ImageView) view
-				.findViewById(R.id.conversation_image);
+			.findViewById(R.id.conversation_image);
 		profilePicture.setImageBitmap(activity.avatarService().get(
-				conversation, activity.getPixel(56)));
+					conversation, activity.getPixel(56)));
 
 		return view;
 	}
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
index 0865d1aa..91fb021c 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
@@ -2,6 +2,7 @@ package eu.siacs.conversations.ui.adapter;
 
 import java.util.List;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.ListItem;
 import eu.siacs.conversations.ui.XmppActivity;
@@ -10,6 +11,7 @@ import eu.siacs.conversations.xmpp.jid.Jid;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,6 +24,17 @@ 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);
@@ -53,6 +66,7 @@ public class ListItemAdapter extends ArrayAdapter<ListItem> {
 				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);
 			}
 		}
@@ -68,4 +82,12 @@ public class ListItemAdapter extends ArrayAdapter<ListItem> {
 		return view;
 	}
 
+	public void setOnTagClickedListener(OnTagClickedListener listener) {
+		this.mOnTagClickedListener = listener;
+	}
+
+	public interface OnTagClickedListener {
+		public void onTagClicked(String tag);
+	}
+
 }
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
index 00000e2b..83b4e41b 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java
@@ -23,7 +23,6 @@ import android.widget.Toast;
 
 import java.util.List;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
@@ -271,7 +270,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 
 			@Override
 			public void onClick(View v) {
-				startDonwloadable(message);
+				startDownloadable(message);
 			}
 		});
 		viewHolder.download_button.setOnLongClickListener(openContextMenu);
@@ -287,7 +286,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 
 			@Override
 			public void onClick(View v) {
-				openDonwloadable(file);
+				openDownloadable(file);
 			}
 		});
 		viewHolder.download_button.setOnLongClickListener(openContextMenu);
@@ -441,6 +440,8 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			}
 			view.setLayoutParams(view.getLayoutParams());
 			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) {
@@ -449,38 +450,36 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 				viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(getDisplayedMucCounterpart(message.getCounterpart()),
                         activity.getPixel(48)));
 			}
-		} else if (type == SENT && viewHolder.contact_picture != null) {
+		} else if (type == SENT) {
 			viewHolder.contact_picture.setImageBitmap(activity.avatarService().get(account, activity.getPixel(48)));
 		}
 
-		if (viewHolder != null && viewHolder.contact_picture != null) {
-			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
+				.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;
-							}
+
+					}
+				});
+		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;
 						}
-					});
-		}
+					}
+				});
 
 		if (message.getDownloadable() != null && message.getDownloadable().getStatus() != Downloadable.STATUS_UPLOADING) {
 			Downloadable d = message.getDownloadable();
@@ -549,7 +548,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		return view;
 	}
 
-	public void startDonwloadable(Message message) {
+	public void startDownloadable(Message message) {
 		Downloadable downloadable = message.getDownloadable();
 		if (downloadable != null) {
 			if (!downloadable.start()) {
@@ -559,7 +558,7 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		}
 	}
 
-	public void openDonwloadable(DownloadableFile file) {
+	public void openDownloadable(DownloadableFile file) {
 		if (!file.exists()) {
 			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
 			return;
diff --git a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
index 8c1a8dea..a09b4d0f 100644
--- a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
@@ -140,15 +140,18 @@ public class DNSHelper {
 			}
 			ArrayList<Bundle> values = new ArrayList<>();
 			for (SRV srv : result) {
-				Bundle namePort = new Bundle();
-				namePort.putString("name", srv.getName());
-				namePort.putInt("port", srv.getPort());
+				boolean added = false;
+				if (ips6.containsKey(srv.getName())) {
+					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips6));
+					added = true;
+				}
 				if (ips4.containsKey(srv.getName())) {
-					ArrayList<String> ip = ips4.get(srv.getName());
-					Collections.shuffle(ip, rnd);
-					namePort.putString("ipv4", ip.get(0));
+					values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips4));
+					added = true;
+				}
+				if (!added) {
+					values.add(createNamePortBundle(srv.getName(),srv.getPort(),null));
 				}
-				values.add(namePort);
 			}
 			bundle.putParcelableArrayList("values", values);
 		} catch (SocketTimeoutException e) {
@@ -159,6 +162,18 @@ public class DNSHelper {
 		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) {
diff --git a/src/main/java/eu/siacs/conversations/utils/PhoneHelper.java b/src/main/java/eu/siacs/conversations/utils/PhoneHelper.java
index 87973159..9a5cbaaf 100644
--- a/src/main/java/eu/siacs/conversations/utils/PhoneHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/PhoneHelper.java
@@ -16,10 +16,7 @@ import android.provider.ContactsContract.Profile;
 
 public class PhoneHelper {
 
-	public static void loadPhoneContacts(Context context,
-			final OnPhoneContactsLoadedListener listener) {
-		final List<Bundle> phoneContacts = new ArrayList<Bundle>();
-
+	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,
diff --git a/src/main/java/eu/siacs/conversations/utils/Validator.java b/src/main/java/eu/siacs/conversations/utils/Validator.java
deleted file mode 100644
index 00130fa2..00000000
--- a/src/main/java/eu/siacs/conversations/utils/Validator.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package eu.siacs.conversations.utils;
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-public class Validator {
-	public static final Pattern VALID_JID = Pattern.compile(
-			"^[^@/<>'\"\\s]+@[^@/<>'\"\\s]+$", Pattern.CASE_INSENSITIVE);
-
-	public static boolean isValidJid(String jid) {
-		Matcher matcher = VALID_JID.matcher(jid);
-		return matcher.find();
-	}
-}
diff --git a/src/main/java/eu/siacs/conversations/utils/Xmlns.java b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
new file mode 100644
index 00000000..67de7c79
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/utils/Xmlns.java
@@ -0,0 +1,7 @@
+package eu.siacs.conversations.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";
+}
diff --git a/src/main/java/eu/siacs/conversations/utils/XmppUri.java b/src/main/java/eu/siacs/conversations/utils/XmppUri.java
index a9b8d1c0..aacb6362 100644
--- a/src/main/java/eu/siacs/conversations/utils/XmppUri.java
+++ b/src/main/java/eu/siacs/conversations/utils/XmppUri.java
@@ -5,7 +5,6 @@ import android.net.Uri;
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 
-import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
@@ -54,7 +53,7 @@ public class XmppUri {
 			final String NEEDLE = "otr-fingerprint=";
 			int index = query.indexOf(NEEDLE);
 			if (index >= 0 && query.length() >= (NEEDLE.length() + index + 40)) {
-				return CryptoHelper.prettifyFingerprint(query.substring(index + NEEDLE.length(), index + NEEDLE.length() + 40));
+				return query.substring(index + NEEDLE.length(), index + NEEDLE.length() + 40);
 			} else {
 				return null;
 			}
diff --git a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java b/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java
deleted file mode 100644
index b777c10c..00000000
--- a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibInputStream.java
+++ /dev/null
@@ -1,54 +0,0 @@
-package eu.siacs.conversations.utils.zlib;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.zip.Inflater;
-import java.util.zip.InflaterInputStream;
-
-/**
- * ZLibInputStream is a zlib and input stream compatible version of an
- * InflaterInputStream. This class solves the incompatibility between
- * {@link InputStream#available()} and {@link InflaterInputStream#available()}.
- */
-public class ZLibInputStream extends InflaterInputStream {
-
-	/**
-	 * Construct a ZLibInputStream, reading data from the underlying stream.
-	 * 
-	 * @param is
-	 *            The {@code InputStream} to read data from.
-	 * @throws IOException
-	 *             If an {@code IOException} occurs.
-	 */
-	public ZLibInputStream(InputStream is) throws IOException {
-		super(is, new Inflater(), 512);
-	}
-
-	/**
-	 * Provide a more InputStream compatible version of available. A return
-	 * value of 1 means that it is likly to read one byte without blocking, 0
-	 * means that the system is known to block for more input.
-	 * 
-	 * @return 0 if no data is available, 1 otherwise
-	 * @throws IOException
-	 */
-	@Override
-	public int available() throws IOException {
-		/*
-		 * This is one of the funny code blocks. InflaterInputStream.available
-		 * violates the contract of InputStream.available, which breaks kXML2.
-		 * 
-		 * I'm not sure who's to blame, oracle/sun for a broken api or the
-		 * google guys for mixing a sun bug with a xml reader that can't handle
-		 * it....
-		 * 
-		 * Anyway, this simple if breaks suns distorted reality, but helps to
-		 * use the api as intended.
-		 */
-		if (inf.needsInput()) {
-			return 0;
-		}
-		return super.available();
-	}
-
-}
diff --git a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java b/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java
deleted file mode 100644
index 8b3f5e68..00000000
--- a/src/main/java/eu/siacs/conversations/utils/zlib/ZLibOutputStream.java
+++ /dev/null
@@ -1,95 +0,0 @@
-package eu.siacs.conversations.utils.zlib;
-
-import java.io.IOException;
-import java.io.OutputStream;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.security.NoSuchAlgorithmException;
-import java.util.zip.Deflater;
-import java.util.zip.DeflaterOutputStream;
-
-/**
- * <p>
- * Android 2.2 includes Java7 FLUSH_SYNC option, which will be used by this
- * Implementation, preferable via reflection. The @hide was remove in API level
- * 19. This class might thus go away in the future.
- * </p>
- * <p>
- * Please use {@link ZLibOutputStream#SUPPORTED} to check for flush
- * compatibility.
- * </p>
- */
-public class ZLibOutputStream extends DeflaterOutputStream {
-
-	/**
-	 * The reflection based flush method.
-	 */
-
-	private final static Method method;
-	/**
-	 * SUPPORTED is true if a flush compatible method exists.
-	 */
-	public final static boolean SUPPORTED;
-
-	/**
-	 * Static block to initialize {@link #SUPPORTED} and {@link #method}.
-	 */
-	static {
-		Method m = null;
-		try {
-			m = Deflater.class.getMethod("deflate", byte[].class, int.class,
-					int.class, int.class);
-		} catch (SecurityException e) {
-		} catch (NoSuchMethodException e) {
-		}
-		method = m;
-		SUPPORTED = (method != null);
-	}
-
-	/**
-	 * Create a new ZLib compatible output stream wrapping the given low level
-	 * stream. ZLib compatiblity means we will send a zlib header.
-	 * 
-	 * @param os
-	 *            OutputStream The underlying stream.
-	 * @throws IOException
-	 *             In case of a lowlevel transfer problem.
-	 * @throws NoSuchAlgorithmException
-	 *             In case of a {@link Deflater} error.
-	 */
-	public ZLibOutputStream(OutputStream os) throws IOException,
-			NoSuchAlgorithmException {
-		super(os, new Deflater(Deflater.BEST_COMPRESSION));
-	}
-
-	/**
-	 * Flush the given stream, preferring Java7 FLUSH_SYNC if available.
-	 * 
-	 * @throws IOException
-	 *             In case of a lowlevel exception.
-	 */
-	@Override
-	public void flush() throws IOException {
-		if (!SUPPORTED) {
-			super.flush();
-			return;
-		}
-		try {
-			int count = 0;
-			do {
-				count = (Integer) method.invoke(def, buf, 0, buf.length, 3);
-				if (count > 0) {
-					out.write(buf, 0, count);
-				}
-			} while (count > 0);
-		} catch (IllegalArgumentException e) {
-			throw new IOException("Can't flush");
-		} catch (IllegalAccessException e) {
-			throw new IOException("Can't flush");
-		} catch (InvocationTargetException e) {
-			throw new IOException("Can't flush");
-		}
-		super.flush();
-	}
-
-}
diff --git a/src/main/java/eu/siacs/conversations/xml/Element.java b/src/main/java/eu/siacs/conversations/xml/Element.java
index 02c3e695..51708759 100644
--- a/src/main/java/eu/siacs/conversations/xml/Element.java
+++ b/src/main/java/eu/siacs/conversations/xml/Element.java
@@ -1,9 +1,12 @@
 package eu.siacs.conversations.xml;
 
+import android.util.Log;
+
 import java.util.ArrayList;
 import java.util.Hashtable;
 import java.util.List;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.utils.XmlHelper;
 import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
@@ -59,16 +62,16 @@ public class Element {
 			if (child.getName().equals(name)
 					&& (child.getAttribute("xmlns").equals(xmlns))) {
 				return child;
-			}
+					}
 		}
 		return null;
 	}
 
-	public boolean hasChild(String name) {
+	public boolean hasChild(final String name) {
 		return findChild(name) != null;
 	}
 
-	public boolean hasChild(String name, String xmlns) {
+	public boolean hasChild(final String name, final String xmlns) {
 		return findChild(name, xmlns) != null;
 	}
 
@@ -107,14 +110,15 @@ public class Element {
 
 	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) {
-                return null;
-            }
-        }
-        return null;
+		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() {
@@ -159,4 +163,9 @@ public class Element {
 	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/eu/siacs/conversations/xmpp/OnAdvancedStreamFeaturesLoaded.java b/src/main/java/eu/siacs/conversations/xmpp/OnAdvancedStreamFeaturesLoaded.java
new file mode 100644
index 00000000..e45eba73
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/xmpp/OnAdvancedStreamFeaturesLoaded.java
@@ -0,0 +1,7 @@
+package eu.siacs.conversations.xmpp;
+
+import eu.siacs.conversations.entities.Account;
+
+public interface OnAdvancedStreamFeaturesLoaded {
+	public void onAdvancedStreamFeaturesAvailable(final Account account);
+}
diff --git a/src/main/java/eu/siacs/conversations/xmpp/OnContactStatusChanged.java b/src/main/java/eu/siacs/conversations/xmpp/OnContactStatusChanged.java
index 849e8e76..20b17f02 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/OnContactStatusChanged.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/OnContactStatusChanged.java
@@ -3,5 +3,5 @@ package eu.siacs.conversations.xmpp;
 import eu.siacs.conversations.entities.Contact;
 
 public interface OnContactStatusChanged {
-	public void onContactStatusChanged(Contact contact, boolean online);
+	public void onContactStatusChanged(final Contact contact, final boolean online);
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/OnUpdateBlocklist.java b/src/main/java/eu/siacs/conversations/xmpp/OnUpdateBlocklist.java
new file mode 100644
index 00000000..92e72cfa
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/xmpp/OnUpdateBlocklist.java
@@ -0,0 +1,13 @@
+package eu.siacs.conversations.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/eu/siacs/conversations/xmpp/XmppConnection.java b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
index fb151427..f7f0c346 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
@@ -30,10 +30,12 @@ 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;
@@ -48,10 +50,10 @@ import eu.siacs.conversations.crypto.sasl.Plain;
 import eu.siacs.conversations.crypto.sasl.SaslMechanism;
 import eu.siacs.conversations.crypto.sasl.ScramSha1;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.generator.IqGenerator;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.DNSHelper;
-import eu.siacs.conversations.utils.zlib.ZLibInputStream;
-import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
+import eu.siacs.conversations.utils.Xmlns;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xml.Tag;
 import eu.siacs.conversations.xml.TagWriter;
@@ -78,21 +80,20 @@ public class XmppConnection implements Runnable {
 	private static final int PACKET_PRESENCE = 2;
 	private final Context applicationContext;
 	protected Account account;
-	private WakeLock wakeLock;
+	private final WakeLock wakeLock;
 	private Socket socket;
 	private XmlReader tagReader;
 	private TagWriter tagWriter;
-	private Features features = new Features(this);
+	private final Features features = new Features(this);
 	private boolean shouldBind = true;
 	private boolean shouldAuthenticate = true;
 	private Element streamFeatures;
-	private HashMap<String, List<String>> disco = new HashMap<>();
+	private final HashMap<String, List<String>> disco = new HashMap<>();
 
 	private String streamId = null;
 	private int smVersion = 3;
-	private SparseArray<String> messageReceipts = new SparseArray<>();
+	private final SparseArray<String> messageReceipts = new SparseArray<>();
 
-	private boolean enabledCompression = false;
 	private boolean enabledEncryption = false;
 	private boolean enabledCarbons = false;
 
@@ -103,19 +104,20 @@ public class XmppConnection implements Runnable {
 	private long lastConnect = 0;
 	private long lastSessionStarted = 0;
 	private int attempt = 0;
-	private Hashtable<String, PacketReceived> packetCallbacks = new Hashtable<>();
+	private final Map<String, PacketReceived> 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(Account account, XmppConnectionService service) {
+	public XmppConnection(final Account account, final XmppConnectionService service) {
 		this.account = account;
 		this.wakeLock = service.getPowerManager().newWakeLock(
 				PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
@@ -131,7 +133,7 @@ public class XmppConnection implements Runnable {
 					&& (account.getStatus() != Account.State.ONLINE)
 					&& (account.getStatus() != Account.State.DISABLED)) {
 				return;
-			}
+					}
 			if (nextStatus == Account.State.ONLINE) {
 				this.attempt = 0;
 			}
@@ -144,7 +146,6 @@ public class XmppConnection implements Runnable {
 
 	protected void connect() {
 		Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
-		enabledCompression = false;
 		enabledEncryption = false;
 		lastConnect = SystemClock.elapsedRealtime();
 		lastPingSent = SystemClock.elapsedRealtime();
@@ -156,15 +157,15 @@ public class XmppConnection implements Runnable {
 			tagWriter = new TagWriter();
 			packetCallbacks.clear();
 			this.changeStatus(Account.State.CONNECTING);
-			Bundle result = DNSHelper.getSRVRecord(account.getServer());
-			ArrayList<Parcelable> values = result.getParcelableArrayList("values");
+			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) {
-					Bundle namePort = (Bundle) values.get(i);
+					final Bundle namePort = (Bundle) values.get(i);
 					try {
 						String srvRecordServer;
 						try {
@@ -173,9 +174,9 @@ public class XmppConnection implements Runnable {
 							// TODO: Handle me?`
 							srvRecordServer = "";
 						}
-						int srvRecordPort = namePort.getInt("port");
-						String srvIpServer = namePort.getString("ipv4");
-						InetSocketAddress addr;
+						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()
@@ -190,10 +191,10 @@ public class XmppConnection implements Runnable {
 						socket = new Socket();
 						socket.connect(addr, 20000);
 						socketError = false;
-					} catch (UnknownHostException e) {
+					} catch (final UnknownHostException e) {
 						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
 						i++;
-					} catch (IOException e) {
+					} catch (final IOException e) {
 						Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
 						i++;
 					}
@@ -207,9 +208,9 @@ public class XmppConnection implements Runnable {
 			} else {
 				throw new IOException("timeout in dns");
 			}
-			OutputStream out = socket.getOutputStream();
+			final OutputStream out = socket.getOutputStream();
 			tagWriter.setOutputStream(out);
-			InputStream in = socket.getInputStream();
+			final InputStream in = socket.getInputStream();
 			tagReader.setInputStream(in);
 			tagWriter.beginDocument();
 			sendStartStream();
@@ -225,14 +226,9 @@ public class XmppConnection implements Runnable {
 			if (socket.isConnected()) {
 				socket.close();
 			}
-		} catch (UnknownHostException e) {
+		} catch (final UnknownHostException | ConnectException e) {
 			this.changeStatus(Account.State.SERVER_NOT_FOUND);
-		} catch (final ConnectException e) {
-			this.changeStatus(Account.State.SERVER_NOT_FOUND);
-		} catch (final IOException | XmlPullParserException e) {
-			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
-			this.changeStatus(Account.State.OFFLINE);
-		} catch (NoSuchAlgorithmException e) {
+		} catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
 			Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
 			this.changeStatus(Account.State.OFFLINE);
 		} finally {
@@ -261,8 +257,6 @@ public class XmppConnection implements Runnable {
 								processStreamFeatures(nextTag);
 							} else if (nextTag.isStart("proceed")) {
 								switchOverToTls(nextTag);
-							} else if (nextTag.isStart("compressed")) {
-								switchOverToZLib(nextTag);
 							} else if (nextTag.isStart("success")) {
 								final String challenge = tagReader.readElement(nextTag).getContent();
 								try {
@@ -273,7 +267,7 @@ public class XmppConnection implements Runnable {
 								}
 								Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
 								account.setKey(Account.PINNED_MECHANISM_KEY,
-                                        String.valueOf(saslMechanism.getPriority()));
+										String.valueOf(saslMechanism.getPriority()));
 								tagReader.reset();
 								sendStartStream();
 								processStream(tagReader.readTag());
@@ -294,7 +288,7 @@ public class XmppConnection implements Runnable {
 								}
 								tagWriter.writeElement(response);
 							} else if (nextTag.isStart("enabled")) {
-								Element enabled = tagReader.readElement(nextTag);
+								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()
@@ -306,14 +300,14 @@ public class XmppConnection implements Runnable {
 								}
 								this.lastSessionStarted = SystemClock.elapsedRealtime();
 								this.stanzasReceived = 0;
-								RequestPacket r = new RequestPacket(smVersion);
+								final RequestPacket r = new RequestPacket(smVersion);
 								tagWriter.writeStanzaAsync(r);
 							} else if (nextTag.isStart("resumed")) {
 								lastPaketReceived = SystemClock.elapsedRealtime();
-								Element resumed = tagReader.readElement(nextTag);
-								String h = resumed.getAttribute("h");
+								final Element resumed = tagReader.readElement(nextTag);
+								final String h = resumed.getAttribute("h");
 								try {
-									int serverCount = Integer.parseInt(h);
+									final int serverCount = Integer.parseInt(h);
 									if (serverCount != stanzasSent) {
 										Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
 												+ ": session resumed with lost packages");
@@ -332,20 +326,19 @@ public class XmppConnection implements Runnable {
 									}
 									messageReceipts.clear();
 								} catch (final NumberFormatException ignored) {
-
 								}
 								sendServiceDiscoveryInfo(account.getServer());
 								sendServiceDiscoveryItems(account.getServer());
 								sendInitialPing();
 							} else if (nextTag.isStart("r")) {
 								tagReader.readElement(nextTag);
-								AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
+								final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
 								tagWriter.writeStanzaAsync(ack);
 							} else if (nextTag.isStart("a")) {
-								Element ack = tagReader.readElement(nextTag);
+								final Element ack = tagReader.readElement(nextTag);
 								lastPaketReceived = SystemClock.elapsedRealtime();
-								int serverSequence = Integer.parseInt(ack.getAttribute("h"));
-								String msgId = this.messageReceipts.get(serverSequence);
+								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(
@@ -379,13 +372,12 @@ public class XmppConnection implements Runnable {
 
 	private void sendInitialPing() {
 		Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
-		IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
+		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(Account account, IqPacket packet) {
+			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);
@@ -393,7 +385,7 @@ public class XmppConnection implements Runnable {
 		});
 	}
 
-	private Element processPacket(Tag currentTag, int packetType)
+	private Element processPacket(final Tag currentTag, final int packetType)
 		throws XmlPullParserException, IOException {
 		Element element;
 		switch (packetType) {
@@ -416,8 +408,8 @@ public class XmppConnection implements Runnable {
 		}
 		while (!nextTag.isEnd(element.getName())) {
 			if (!nextTag.isNo()) {
-				Element child = tagReader.readElement(nextTag);
-				String type = currentTag.getAttribute("type");
+				final Element child = tagReader.readElement(nextTag);
+				final String type = currentTag.getAttribute("type");
 				if (packetType == PACKET_IQ
 						&& "jingle".equals(child.getName())
 						&& ("set".equalsIgnoreCase(type) || "get"
@@ -437,9 +429,9 @@ public class XmppConnection implements Runnable {
 		return element;
 	}
 
-	private void processIq(Tag currentTag) throws XmlPullParserException,
+	private void processIq(final Tag currentTag) throws XmlPullParserException,
 					IOException {
-						IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
+						final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
 
 						if (packet.getId() == null) {
 							return; // an iq packet without id is definitely invalid
@@ -466,11 +458,11 @@ public class XmppConnection implements Runnable {
 						}
 	}
 
-	private void processMessage(Tag currentTag) throws XmlPullParserException,
+	private void processMessage(final Tag currentTag) throws XmlPullParserException,
 					IOException {
-						MessagePacket packet = (MessagePacket) processPacket(currentTag,
+						final MessagePacket packet = (MessagePacket) processPacket(currentTag,
 								PACKET_MESSAGE);
-						String id = packet.getAttribute("id");
+						final String id = packet.getAttribute("id");
 						if ((id != null) && (packetCallbacks.containsKey(id))) {
 							if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
 								((OnMessagePacketReceived) packetCallbacks.get(id))
@@ -482,11 +474,11 @@ public class XmppConnection implements Runnable {
 						}
 	}
 
-	private void processPresence(Tag currentTag) throws XmlPullParserException,
+	private void processPresence(final Tag currentTag) throws XmlPullParserException,
 					IOException {
 						PresencePacket packet = (PresencePacket) processPacket(currentTag,
 								PACKET_PRESENCE);
-						String id = packet.getAttribute("id");
+						final String id = packet.getAttribute("id");
 						if ((id != null) && (packetCallbacks.containsKey(id))) {
 							if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
 								((OnPresencePacketReceived) packetCallbacks.get(id))
@@ -498,30 +490,8 @@ public class XmppConnection implements Runnable {
 						}
 	}
 
-	private void sendCompressionZlib() throws IOException {
-		Element compress = new Element("compress");
-		compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
-		compress.addChild("method").setContent("zlib");
-		tagWriter.writeElement(compress);
-	}
-
-	private void switchOverToZLib(final Tag currentTag)
-		throws XmlPullParserException, IOException,
-										NoSuchAlgorithmException {
-						 tagReader.readTag(); // read tag close
-						 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
-								 .getOutputStream()));
-						 tagReader
-							 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
-
-						 sendStartStream();
-						 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": compression enabled");
-						 enabledCompression = true;
-						 processStream(tagReader.readTag());
-	}
-
 	private void sendStartTLS() throws IOException {
-		Tag startTLS = Tag.empty("starttls");
+		final Tag startTLS = Tag.empty("starttls");
 		startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
 		tagWriter.writeTag(startTLS);
 	}
@@ -535,74 +505,61 @@ public class XmppConnection implements Runnable {
 		return getPreferences().getBoolean("enable_legacy_ssl", false);
 	}
 
-	private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
-					IOException {
-						tagReader.readTag();
-						try {
-							SSLContext sc = SSLContext.getInstance("TLS");
-							sc.init(null,
-									new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
-									mXmppConnectionService.getRNG());
-							SSLSocketFactory factory = sc.getSocketFactory();
-
-							if (factory == null) {
-								throw new IOException("SSLSocketFactory was null");
-							}
-
-							final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
+	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");
+			}
 
-							if (socket == null || socket.isClosed()) {
-								throw new IOException("socket null or closed");
-							}
-							final InetAddress address = socket.getInetAddress();
-							if (address == null) {
-								throw new IOException("socket address was null");
-							}
+            final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
 
-							final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
+			if (sslSocket == null) {
+				throw new IOException("could not initialize ssl socket");
+			}
 
-							// Support all protocols except legacy SSL.
-							// The min SDK version prevents us having to worry about SSLv2. In
-							// future, this may be true of SSLv3 as well.
-							final String[] supportProtocols;
-							if (enableLegacySSL()) {
-								supportProtocols = sslSocket.getSupportedProtocols();
-							} else {
-								final List<String> supportedProtocols = new LinkedList<>(
-										Arrays.asList(sslSocket.getSupportedProtocols()));
-								supportedProtocols.remove("SSLv3");
-								supportProtocols = new String[supportedProtocols.size()];
-								supportedProtocols.toArray(supportProtocols);
-							}
-							sslSocket.setEnabledProtocols(supportProtocols);
-
-                            if (verifier != null
-                                    && !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");
-							enabledEncryption = true;
-							processStream(tagReader.readTag());
-							sslSocket.close();
-						} catch (final NoSuchAlgorithmException | KeyManagementException e1) {
-							e1.printStackTrace();
-						}
+			final String[] supportProtocols;
+			if (enableLegacySSL()) {
+				supportProtocols = sslSocket.getSupportedProtocols();
+			} else {
+				final Collection<String> supportedProtocols = new LinkedList<>(
+						Arrays.asList(sslSocket.getSupportedProtocols()));
+				supportedProtocols.remove("SSLv3");
+				supportProtocols = new String[supportedProtocols.size()];
+				supportedProtocols.toArray(supportProtocols);
+            }
+			sslSocket.setEnabledProtocols(supportProtocols);
+
+            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");
+			enabledEncryption = 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(Tag currentTag)
+	private void processStreamFeatures(final Tag currentTag)
 		throws XmlPullParserException, IOException {
 		this.streamFeatures = tagReader.readElement(currentTag);
 		if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
 			sendStartTLS();
-		} else if (compressionAvailable()) {
-			sendCompressionZlib();
 		} else if (this.streamFeatures.hasChild("register")
 				&& account.isOptionSet(Account.OPTION_REGISTER)
 				&& enabledEncryption) {
@@ -619,10 +576,10 @@ public class XmppConnection implements Runnable {
 			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("DIGEST-MD5")) {
-				saslMechanism = new DigestMd5(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 {
@@ -634,7 +591,7 @@ public class XmppConnection implements Runnable {
 							"). 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");
 			}
@@ -647,7 +604,7 @@ public class XmppConnection implements Runnable {
 		} else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
 					+ smVersion)
 				&& streamId != null) {
-			ResumePacket resume = new ResumePacket(this.streamId,
+			final ResumePacket resume = new ResumePacket(this.streamId,
 					stanzasReceived, smVersion);
 			this.tagWriter.writeStanzaAsync(resume);
 		} else if (this.streamFeatures.hasChild("bind") && shouldBind) {
@@ -658,67 +615,44 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	private boolean compressionAvailable() {
-		if (!this.streamFeatures.hasChild("compression",
-					"http://jabber.org/features/compress"))
-			return false;
-		if (!ZLibOutputStream.SUPPORTED)
-			return false;
-		if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
-			return false;
-
-		Element compression = this.streamFeatures.findChild("compression",
-				"http://jabber.org/features/compress");
-		for (Element child : compression.getChildren()) {
-			if (!"method".equals(child.getName()))
-				continue;
-
-			if ("zlib".equalsIgnoreCase(child.getContent())) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	private List<String> extractMechanisms(Element stream) {
-		ArrayList<String> mechanisms = new ArrayList<>(stream
+	private List<String> extractMechanisms(final Element stream) {
+		final ArrayList<String> mechanisms = new ArrayList<>(stream
 				.getChildren().size());
-		for (Element child : stream.getChildren()) {
+		for (final Element child : stream.getChildren()) {
 			mechanisms.add(child.getContent());
 		}
 		return mechanisms;
 	}
 
 	private void sendRegistryRequest() {
-		IqPacket register = new IqPacket(IqPacket.TYPE_GET);
+		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(Account account, IqPacket packet) {
-				Element instructions = packet.query().findChild("instructions");
+			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"))) {
-					IqPacket register = new IqPacket(IqPacket.TYPE_SET);
-					Element username = new Element("username")
-							.setContent(account.getUsername());
-					Element password = new Element("password")
-							.setContent(account.getPassword());
+					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(Account account,
-													   IqPacket packet) {
+						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"))) {
+										.hasChild("conflict"))) {
 								changeStatus(Account.State.REGISTRATION_CONFLICT);
 							} else {
 								changeStatus(Account.State.REGISTRATION_FAILED);
@@ -738,14 +672,14 @@ public class XmppConnection implements Runnable {
 		});
 	}
 
-	private void sendBindRequest() throws IOException {
-		IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
+	private void sendBindRequest() {
+		final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
 		iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
 			.addChild("resource").setContent(account.getResource());
 		this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
 			@Override
-			public void onIqPacketReceived(Account account, IqPacket packet) {
-				Element bind = packet.findChild("bind");
+			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) {
@@ -756,14 +690,14 @@ public class XmppConnection implements Runnable {
 						}
 						if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
 							smVersion = 3;
-							EnablePacket enable = new EnablePacket(smVersion);
+							final EnablePacket enable = new EnablePacket(smVersion);
 							tagWriter.writeStanzaAsync(enable);
 							stanzasSent = 0;
 							messageReceipts.clear();
 						} else if (streamFeatures.hasChild("sm",
-								"urn:xmpp:sm:2")) {
+									"urn:xmpp:sm:2")) {
 							smVersion = 2;
-							EnablePacket enable = new EnablePacket(smVersion);
+							final EnablePacket enable = new EnablePacket(smVersion);
 							tagWriter.writeStanzaAsync(enable);
 							stanzasSent = 0;
 							messageReceipts.clear();
@@ -787,7 +721,7 @@ public class XmppConnection implements Runnable {
 		if (this.streamFeatures.hasChild("session")) {
 			Log.d(Config.LOGTAG, account.getJid().toBareJid()
 					+ ": sending deprecated session");
-			IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
+			final IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
 			startSession.addChild("session",
 					"urn:ietf:params:xml:ns:xmpp-session");
 			this.sendUnboundIqPacket(startSession, null);
@@ -806,10 +740,10 @@ public class XmppConnection implements Runnable {
 			this.sendIqPacket(iq, new OnIqPacketReceived() {
 
 				@Override
-				public void onIqPacketReceived(Account account, IqPacket packet) {
+				public void onIqPacketReceived(final Account account, final IqPacket packet) {
 					final List<Element> elements = packet.query().getChildren();
 					final List<String> features = new ArrayList<>();
-					for (Element element : elements) {
+					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
@@ -823,6 +757,9 @@ public class XmppConnection implements Runnable {
 
 					if (account.getServer().equals(server.toDomainJid())) {
 						enableAdvancedStreamFeatures();
+						for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
+							listener.onAdvancedStreamFeaturesAvailable(account);
+						}
 					}
 				}
 			});
@@ -835,6 +772,10 @@ public class XmppConnection implements Runnable {
 				sendEnableCarbons();
 			}
 		}
+		if (getFeatures().blocking()) {
+			Log.d(Config.LOGTAG, "Requesting block list");
+			this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
+		}
 	}
 
 	private void sendServiceDiscoveryItems(final Jid server) {
@@ -844,9 +785,9 @@ public class XmppConnection implements Runnable {
 		this.sendIqPacket(iq, new OnIqPacketReceived() {
 
 			@Override
-			public void onIqPacketReceived(Account account, IqPacket packet) {
-				List<Element> elements = packet.query().getChildren();
-				for (Element element : elements) {
+			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())) {
@@ -859,12 +800,12 @@ public class XmppConnection implements Runnable {
 	}
 
 	private void sendEnableCarbons() {
-		IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
+		final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
 		iq.addChild("enable", "urn:xmpp:carbons:2");
 		this.sendIqPacket(iq, new OnIqPacketReceived() {
 
 			@Override
-			public void onIqPacketReceived(Account account, IqPacket packet) {
+			public void onIqPacketReceived(final Account account, final IqPacket packet) {
 				if (!packet.hasChild("error")) {
 					Log.d(Config.LOGTAG, account.getJid().toBareJid()
 							+ ": successfully enabled carbons");
@@ -877,20 +818,20 @@ public class XmppConnection implements Runnable {
 		});
 	}
 
-	private void processStreamError(Tag currentTag)
+	private void processStreamError(final Tag currentTag)
 		throws XmlPullParserException, IOException {
-		Element streamError = tagReader.readElement(currentTag);
+		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() + ")");
+					+ account.getResource() + ")");
 		}
 	}
 
 	private void sendStartStream() throws IOException {
-		Tag stream = Tag.start("stream:stream");
+		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");
@@ -904,33 +845,32 @@ public class XmppConnection implements Runnable {
 		return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
 	}
 
-	public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
+	public void sendIqPacket(final IqPacket packet, final PacketReceived callback) {
 		if (packet.getId() == null) {
-			String id = nextRandomId();
+			final String id = nextRandomId();
 			packet.setAttribute("id", id);
 		}
 		packet.setFrom(account.getJid());
 		this.sendPacket(packet, callback);
 	}
 
-	public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
+	public void sendUnboundIqPacket(final IqPacket packet, final PacketReceived callback) {
 		if (packet.getId() == null) {
-			String id = nextRandomId();
+			final String id = nextRandomId();
 			packet.setAttribute("id", id);
 		}
 		this.sendPacket(packet, callback);
 	}
 
-	public void sendMessagePacket(MessagePacket packet) {
+	public void sendMessagePacket(final MessagePacket packet) {
 		this.sendPacket(packet, null);
 	}
 
-	public void sendPresencePacket(PresencePacket packet) {
+	public void sendPresencePacket(final PresencePacket packet) {
 		this.sendPacket(packet, null);
 	}
 
-	private synchronized void sendPacket(final AbstractStanza packet,
-			PacketReceived callback) {
+	private synchronized void sendPacket(final AbstractStanza packet, final PacketReceived callback) {
 		if (packet.getName().equals("iq") || packet.getName().equals("message")
 				|| packet.getName().equals("presence")) {
 			++stanzasSent;
@@ -955,7 +895,7 @@ public class XmppConnection implements Runnable {
 		if (streamFeatures.hasChild("sm")) {
 			tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
 		} else {
-			IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
+			final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
 			iq.setFrom(account.getJid());
 			iq.addChild("ping", "urn:xmpp:ping");
 			this.sendIqPacket(iq, null);
@@ -964,38 +904,44 @@ public class XmppConnection implements Runnable {
 	}
 
 	public void setOnMessagePacketReceivedListener(
-			OnMessagePacketReceived listener) {
+			final OnMessagePacketReceived listener) {
 		this.messageListener = listener;
 			}
 
 	public void setOnUnregisteredIqPacketReceivedListener(
-			OnIqPacketReceived listener) {
+			final OnIqPacketReceived listener) {
 		this.unregisteredIqListener = listener;
 			}
 
 	public void setOnPresencePacketReceivedListener(
-			OnPresencePacketReceived listener) {
+			final OnPresencePacketReceived listener) {
 		this.presenceListener = listener;
 			}
 
 	public void setOnJinglePacketReceivedListener(
-			OnJinglePacketReceived listener) {
+			final OnJinglePacketReceived listener) {
 		this.jingleListener = listener;
 			}
 
-	public void setOnStatusChangedListener(OnStatusChanged listener) {
+	public void setOnStatusChangedListener(final OnStatusChanged listener) {
 		this.statusListener = listener;
 	}
 
-	public void setOnBindListener(OnBindListener listener) {
+	public void setOnBindListener(final OnBindListener listener) {
 		this.bindListener = listener;
 	}
 
-	public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
+	public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
 		this.acknowledgedListener = listener;
 	}
 
-	public void disconnect(boolean force) {
+	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) {
@@ -1015,23 +961,23 @@ public class XmppConnection implements Runnable {
 							}
 							tagWriter.writeTag(Tag.end("stream:stream"));
 							socket.close();
-						} catch (IOException e) {
+						} catch (final IOException e) {
 							Log.d(Config.LOGTAG,
 									"io exception during disconnect");
-						} catch (InterruptedException e) {
+						} catch (final InterruptedException e) {
 							Log.d(Config.LOGTAG, "interrupted");
 						}
 					}
 				}
 			}).start();
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			Log.d(Config.LOGTAG, "io exception during disconnect");
 		}
 	}
 
-	public List<String> findDiscoItemsByFeature(String feature) {
+	public List<String> findDiscoItemsByFeature(final String feature) {
 		final List<String> items = new ArrayList<>();
-		for (Entry<String, List<String>> cursor : disco.entrySet()) {
+		for (final Entry<String, List<String>> cursor : disco.entrySet()) {
 			if (cursor.getValue().contains(feature)) {
 				items.add(cursor.getKey());
 			}
@@ -1039,8 +985,8 @@ public class XmppConnection implements Runnable {
 		return items;
 	}
 
-	public String findDiscoItemByFeature(String feature) {
-		List<String> items = findDiscoItemsByFeature(feature);
+	public String findDiscoItemByFeature(final String feature) {
+		final List<String> items = findDiscoItemsByFeature(feature);
 		if (items.size() >= 1) {
 			return items.get(0);
 		}
@@ -1052,8 +998,7 @@ public class XmppConnection implements Runnable {
 	}
 
 	public String getMucServer() {
-		final List<String> items = new ArrayList<>();
-		for (Entry<String, List<String>> cursor : disco.entrySet()) {
+		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();
@@ -1063,8 +1008,8 @@ public class XmppConnection implements Runnable {
 	}
 
 	public int getTimeToNextAttempt() {
-		int interval = (int) (25 * Math.pow(1.5, attempt));
-		int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
+		final int interval = (int) (25 * Math.pow(1.5, attempt));
+		final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
 		return interval - secondsSinceLast;
 	}
 
@@ -1077,7 +1022,7 @@ public class XmppConnection implements Runnable {
 	}
 
 	public long getLastSessionEstablished() {
-		long diff;
+		final long diff;
 		if (this.lastSessionStarted == 0) {
 			diff = SystemClock.elapsedRealtime() - this.lastConnect;
 		} else {
@@ -1109,7 +1054,7 @@ public class XmppConnection implements Runnable {
 	public class Features {
 		XmppConnection connection;
 
-		public Features(XmppConnection connection) {
+		public Features(final XmppConnection connection) {
 			this.connection = connection;
 		}
 
@@ -1122,6 +1067,14 @@ public class XmppConnection implements Runnable {
 			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;
 		}
@@ -1139,6 +1092,10 @@ public class XmppConnection implements Runnable {
 			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");
 		}
@@ -1147,9 +1104,9 @@ public class XmppConnection implements Runnable {
 			return connection
 				.findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
 		}
+	}
 
-		public boolean compression() {
-			return connection.enabledCompression;
-		}
+	private IqGenerator getIqGenerator() {
+		return mXmppConnectionService.getIqGenerator();
 	}
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/forms/Data.java b/src/main/java/eu/siacs/conversations/xmpp/forms/Data.java
index ff9acb3f..44794c80 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/forms/Data.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/forms/Data.java
@@ -37,6 +37,7 @@ public class Data extends Element {
 		Field field = getFieldByName(name);
 		if (field == null) {
 			field = new Field(name);
+			this.addChild(field);
 		}
 		field.setValue(value);
 	}
@@ -45,6 +46,7 @@ public class Data extends Element {
 		Field field = getFieldByName(name);
 		if (field == null) {
 			field = new Field(name);
+			this.addChild(field);
 		}
 		field.setValues(values);
 	}
@@ -72,4 +74,12 @@ public class Data extends Element {
 		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/eu/siacs/conversations/xmpp/jid/Jid.java b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
index c40fa0b6..a35ea37c 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jid/Jid.java
@@ -32,7 +32,7 @@ public final class Jid {
 		return resourcepart;
 	}
 
-	public static Jid fromSessionID(SessionID id) throws InvalidJidException{
+	public static Jid fromSessionID(final SessionID id) throws InvalidJidException{
 		if (id.getUserID().isEmpty()) {
 			return Jid.fromString(id.getAccountID());
 		} else {
@@ -190,4 +190,8 @@ public final class Jid {
 	public boolean isBareJid() {
 		return this.resourcepart.isEmpty();
 	}
+
+	public boolean isDomainJid() {
+		return !this.hasLocalpart();
+	}
 }
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
index 3a1ba778..d578ca38 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
@@ -191,10 +191,10 @@ public class JingleConnection implements Downloadable {
 		}
 		IqPacket response;
 		if (returnResult) {
-			response = packet.generateRespone(IqPacket.TYPE_RESULT);
+			response = packet.generateResponse(IqPacket.TYPE_RESULT);
 
 		} else {
-			response = packet.generateRespone(IqPacket.TYPE_ERROR);
+			response = packet.generateResponse(IqPacket.TYPE_ERROR);
 		}
 		account.getXmppConnection().sendIqPacket(response, null);
 	}
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
index 72c960d8..b0a730b1 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleConnectionManager.java
@@ -46,7 +46,7 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 					return;
 				}
 			}
-			IqPacket response = packet.generateRespone(IqPacket.TYPE_ERROR);
+			IqPacket response = packet.generateResponse(IqPacket.TYPE_ERROR);
 			Element error = response.addChild("error");
 			error.setAttribute("type", "cancel");
 			error.addChild("item-not-found",
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
index 04b225d0..e25f7e65 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleInbandTransport.java
@@ -208,15 +208,15 @@ public class JingleInbandTransport extends JingleTransport {
 				established = true;
 				connected = true;
 				this.account.getXmppConnection().sendIqPacket(
-						packet.generateRespone(IqPacket.TYPE_RESULT), null);
+						packet.generateResponse(IqPacket.TYPE_RESULT), null);
 			} else {
 				this.account.getXmppConnection().sendIqPacket(
-						packet.generateRespone(IqPacket.TYPE_ERROR), null);
+						packet.generateResponse(IqPacket.TYPE_ERROR), null);
 			}
 		} else if (connected && payload.getName().equals("data")) {
 			this.receiveNextBlock(payload.getContent());
 			this.account.getXmppConnection().sendIqPacket(
-					packet.generateRespone(IqPacket.TYPE_RESULT), null);
+					packet.generateResponse(IqPacket.TYPE_RESULT), null);
 		} else {
 			// TODO some sort of exception
 		}
diff --git a/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java b/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
index 9e051472..1a49b45e 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/stanzas/AbstractStanza.java
@@ -1,7 +1,6 @@
 package eu.siacs.conversations.xmpp.stanzas;
 
 import eu.siacs.conversations.xml.Element;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
 import eu.siacs.conversations.xmpp.jid.Jid;
 
 public class AbstractStanza extends Element {
@@ -11,24 +10,11 @@ public class AbstractStanza extends Element {
 	}
 
 	public Jid getTo() {
-		try {
-			return Jid.fromString(getAttribute("to"));
-		} catch (final InvalidJidException e) {
-			return null;
-		}
+		return getAttributeAsJid("to");
 	}
 
 	public Jid getFrom() {
-		String from = getAttribute("from");
-		if (from == null) {
-			return null;
-		} else {
-			try {
-				return Jid.fromString(from);
-			} catch (final InvalidJidException e) {
-				return null;
-			}
-		}
+		return getAttributeAsJid("from");
 	}
 
 	public String getId() {
diff --git a/src/main/java/eu/siacs/conversations/xmpp/stanzas/IqPacket.java b/src/main/java/eu/siacs/conversations/xmpp/stanzas/IqPacket.java
index 9df05e67..2481112b 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/stanzas/IqPacket.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/stanzas/IqPacket.java
@@ -9,27 +9,27 @@ public class IqPacket extends AbstractStanza {
 	public static final int TYPE_RESULT = 1;
 	public static final int TYPE_GET = 2;
 
-	private IqPacket(String name) {
+	private IqPacket(final String name) {
 		super(name);
 	}
 
-	public IqPacket(int type) {
+	public IqPacket(final int type) {
 		super("iq");
 		switch (type) {
-		case TYPE_SET:
-			this.setAttribute("type", "set");
-			break;
-		case TYPE_GET:
-			this.setAttribute("type", "get");
-			break;
-		case TYPE_RESULT:
-			this.setAttribute("type", "result");
-			break;
-		case TYPE_ERROR:
-			this.setAttribute("type", "error");
-			break;
-		default:
-			break;
+			case TYPE_SET:
+				this.setAttribute("type", "set");
+				break;
+			case TYPE_GET:
+				this.setAttribute("type", "get");
+				break;
+			case TYPE_RESULT:
+				this.setAttribute("type", "result");
+				break;
+			case TYPE_ERROR:
+				this.setAttribute("type", "error");
+				break;
+			default:
+				break;
 		}
 	}
 
@@ -45,29 +45,30 @@ public class IqPacket extends AbstractStanza {
 		return query;
 	}
 
-	public Element query(String xmlns) {
-		Element query = query();
+	public Element query(final String xmlns) {
+		final Element query = query();
 		query.setAttribute("xmlns", xmlns);
 		return query();
 	}
 
 	public int getType() {
-		String type = getAttribute("type");
-		if ("error".equals(type)) {
-			return TYPE_ERROR;
-		} else if ("result".equals(type)) {
-			return TYPE_RESULT;
-		} else if ("set".equals(type)) {
-			return TYPE_SET;
-		} else if ("get".equals(type)) {
-			return TYPE_GET;
-		} else {
-			return 1000;
+		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 1000;
 		}
 	}
 
-	public IqPacket generateRespone(int type) {
-		IqPacket packet = new IqPacket(type);
+	public IqPacket generateResponse(final int type) {
+		final IqPacket packet = new IqPacket(type);
 		packet.setTo(this.getFrom());
 		packet.setId(this.getId());
 		return packet;