Merge branch 'rework_Updater'

22 files changed, 361 insertions, 404 deletions

diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml
index c4427fd75..31ce67bd7 100644
--- a/src/main/AndroidManifest.xml
+++ b/src/main/AndroidManifest.xml
@@ -261,8 +261,7 @@
             android:name="com.soundcloud.android.crop.CropImageActivity">
         </activity>
 
-        <service android:name="de.pixart.messenger.services.UpdaterWebService" />
-        <service android:name="de.pixart.messenger.services.CheckAppVersionService" />
+        <service android:name="de.pixart.messenger.services.UpdateService" />
         <service android:name="de.pixart.messenger.services.ExportLogsService" />
         <service
             android:name="de.pixart.messenger.services.ContactChooserTargetService"
diff --git a/src/main/java/de/pixart/messenger/Config.java b/src/main/java/de/pixart/messenger/Config.java
index 21f830a5c..83bea23b1 100644
--- a/src/main/java/de/pixart/messenger/Config.java
+++ b/src/main/java/de/pixart/messenger/Config.java
@@ -122,7 +122,7 @@ public final class Config {
     public static final int EXPIRY_INTERVAL = 30 * 60 * 1000; // 30 minutes
 
     public static final String UPDATE_URL = BuildConfig.UPDATE_URL;
-    public static final long UPDATE_CHECK_TIMER = 24 * 60 * 60; // in seconds
+    public static final long UPDATE_CHECK_TIMER = 24 * 60 * 60; // 24 h in seconds
 
     public static final String ISSUE_URL = "xmpp://support@room.pix-art.de?join";
 
diff --git a/src/main/java/de/pixart/messenger/services/CheckAppVersionService.java b/src/main/java/de/pixart/messenger/services/CheckAppVersionService.java
deleted file mode 100644
index e3c4353ed..000000000
--- a/src/main/java/de/pixart/messenger/services/CheckAppVersionService.java
+++ /dev/null
@@ -1,42 +0,0 @@
-package de.pixart.messenger.services;
-
-import com.google.gson.JsonObject;
-
-import java.io.IOException;
-import java.io.PrintWriter;
-
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-
-public class CheckAppVersionService extends HttpServlet {
-    private static final long serialVersionUID = 1L;
-
-    public CheckAppVersionService() {
-        super();
-    }
-
-    protected void doGet(HttpServletRequest request, HttpServletResponse response)
-            throws ServletException, IOException {
-        doPost(request, response);
-    }
-
-    protected void doPost(HttpServletRequest request, HttpServletResponse response)
-            throws ServletException, IOException {
-
-        PrintWriter out = response.getWriter();
-        response.setContentType("text/html");
-
-        //send a JSON response with the app Version and file URI
-        JsonObject myObj = new JsonObject();
-        myObj.addProperty("success", false);
-        myObj.addProperty("latestVersionCode", 2);
-        myObj.addProperty("latestVersion", "1.0.0");
-        myObj.addProperty("changelog", "");
-        myObj.addProperty("filesize", "");
-        myObj.addProperty("appURI", "");
-        out.println(myObj.toString());
-        out.close();
-    }
-}
diff --git a/src/main/java/de/pixart/messenger/services/NotificationService.java b/src/main/java/de/pixart/messenger/services/NotificationService.java
index daeba94e3..c1ec963f1 100644
--- a/src/main/java/de/pixart/messenger/services/NotificationService.java
+++ b/src/main/java/de/pixart/messenger/services/NotificationService.java
@@ -62,6 +62,7 @@ public class NotificationService {
     public static final int NOTIFICATION_ID = 2 * NOTIFICATION_ID_MULTIPLIER;
     public static final int FOREGROUND_NOTIFICATION_ID = NOTIFICATION_ID_MULTIPLIER * 4;
     public static final int ERROR_NOTIFICATION_ID = NOTIFICATION_ID_MULTIPLIER * 6;
+    public static final int UPDATE_NOTIFICATION_ID = NOTIFICATION_ID_MULTIPLIER * 8;
     private Conversation mOpenConversation;
     private boolean mIsInForeground;
     private long mLastNotification;
@@ -779,4 +780,5 @@ public class NotificationService {
         notificationManager.notify(FOREGROUND_NOTIFICATION_ID, notification);
         return notification;
     }
+
 }
diff --git a/src/main/java/de/pixart/messenger/services/UpdateService.java b/src/main/java/de/pixart/messenger/services/UpdateService.java
new file mode 100644
index 000000000..bb186063b
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/services/UpdateService.java
@@ -0,0 +1,196 @@
+package de.pixart.messenger.services;
+
+import android.app.Notification;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Handler;
+import android.os.Looper;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.app.NotificationManagerCompat;
+import android.util.Log;
+import android.widget.Toast;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+
+import de.pixart.messenger.BuildConfig;
+import de.pixart.messenger.Config;
+import de.pixart.messenger.R;
+import de.pixart.messenger.ui.UpdaterActivity;
+
+import static de.pixart.messenger.services.NotificationService.UPDATE_NOTIFICATION_ID;
+
+public class UpdateService extends AsyncTask<String, Object, UpdateService.Wrapper> {
+
+    private Context context;
+
+    public UpdateService(Context context) {
+        this.context = context;
+    }
+
+    public class Wrapper
+    {
+        public boolean UpdateAvailable;
+        public boolean showNoUpdateToast;
+    }
+
+    @Override
+    protected Wrapper doInBackground(String... params) {
+
+        boolean showNoUpdateToast = false;
+        if (params[0].equals("true")) {
+            showNoUpdateToast = true;
+        }
+
+
+        HttpsURLConnection connection = null;
+        String jsonString = "";
+        boolean UpdateAvailable = false;
+
+        try  {
+            URL url = new URL(Config.UPDATE_URL);
+            connection = (HttpsURLConnection)url.openConnection();
+            connection.setConnectTimeout(Config.SOCKET_TIMEOUT * 1000);
+            connection.setReadTimeout(Config.SOCKET_TIMEOUT * 1000);
+            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+            String line;
+            while ((line = reader.readLine()) != null) {
+                jsonString += line;
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        } finally {
+            if (connection != null) {
+                connection.disconnect();
+            }
+        }
+
+        try {
+            JSONObject json = new JSONObject(jsonString);
+            if (json.getBoolean("success") && json.has("latestVersion") && json.has("appURI") && json.has("filesize")) {
+                String version = json.getString("latestVersion");
+                String ownVersion = BuildConfig.VERSION_NAME;
+                String url = json.getString("appURI");
+                String filesize = json.getString("filesize");
+                String changelog = "";
+                if (json.has("changelog")) {
+                    changelog = json.getString("changelog");
+                }
+                if (checkVersion(version, ownVersion) >= 1) {
+                    Log.d(Config.LOGTAG, "AppUpdater: Version " + ownVersion + " should be updated to " + version);
+                    UpdateAvailable = true;
+                    showNotification(url, changelog, version, filesize);
+                } else {
+                    Log.d(Config.LOGTAG, "AppUpdater: Version " + ownVersion + " is up to date");
+                    UpdateAvailable = false;
+                }
+            }
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+        Wrapper w = new Wrapper();
+        w.UpdateAvailable = UpdateAvailable;
+        w.showNoUpdateToast = showNoUpdateToast;
+        return w;
+    }
+
+    @Override
+    protected void onPostExecute(Wrapper w) {
+        super.onPostExecute(w);
+        if (!w.UpdateAvailable) {
+            noUpdateMessage(w.showNoUpdateToast);
+        }
+    }
+
+    private void noUpdateMessage(boolean show) {
+        if (!show) {
+            return;
+        }
+        Handler handler = new Handler(Looper.getMainLooper());
+        handler.post(new Runnable() {
+
+            @Override
+            public void run() {
+                Toast.makeText(context, context.getString(R.string.no_update_available), Toast.LENGTH_LONG).show();
+            }
+        });
+    }
+
+    private void showNotification(String url, String changelog, String version, String filesize) {
+        Intent intent = new Intent(context, UpdaterActivity.class);
+        intent.putExtra("update", "PixArtMessenger_UpdateService");
+        intent.putExtra("url", url);
+        intent.putExtra("changelog", changelog);
+        PendingIntent pi = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
+        final NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
+        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context);
+        mBuilder.setContentTitle(context.getString(R.string.update_service));
+        mBuilder.setContentText(String.format(context.getString(R.string.update_available), version, filesize));
+        mBuilder.setSmallIcon(R.drawable.ic_update_notification);
+        mBuilder.setContentIntent(pi);
+        Notification notification = mBuilder.build();
+        notificationManager.notify(UPDATE_NOTIFICATION_ID, notification);
+    }
+
+    private int checkVersion(String remoteVersion, String installedVersion) {
+        // Use this instead of String.compareTo() for a non-lexicographical
+        // comparison that works for version strings. e.g. "1.10".compareTo("1.6").
+        //
+        // @param str1 a string of ordinal numbers separated by decimal points.
+        // @param str2 a string of ordinal numbers separated by decimal points.
+        // @return The result is a negative integer if str1 is _numerically_ less than str2.
+        // The result is a positive integer if str1 is _numerically_ greater than str2.
+        // The result is zero if the strings are _numerically_ equal.
+        // @note It does not work if "1.10" is supposed to be equal to "1.10.0".
+
+        String[] remote = null;
+        String[] installed = null;
+        String[] remoteV = null;
+        String[] installedV = null;
+        try {
+            installedV = installedVersion.split(" ");
+            Log.d(Config.LOGTAG, "AppUpdater: Version installed: " + installedV[0]);
+            installed = installedV[0].split("\\.");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        try {
+            remoteV = remoteVersion.split(" ");
+            if (installedV != null && installedV.length > 1) {
+                if (installedV[1] != null) {
+                    remoteV[0] = remoteV[0] + ".1";
+                }
+            }
+            Log.d(Config.LOGTAG, "AppUpdater: Version on server: " + remoteV[0]);
+            remote = remoteV[0].split("\\.");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        int i = 0;
+        // set index to first non-equal ordinal or length of shortest localVersion string
+        if (remote != null && installed != null) {
+            while (i < remote.length && i < installed.length && remote[i].equals(installed[i])) {
+                i++;
+            }
+            // compare first non-equal ordinal number
+            if (i < remote.length && i < installed.length) {
+                int diff = Integer.valueOf(remote[i]).compareTo(Integer.valueOf(installed[i]));
+                return Integer.signum(diff);
+            }
+            // the strings are equal or one string is a substring of the other
+            // e.g. "1.2.3" = "1.2.3" or "1.2.3" < "1.2.3.4"
+            return Integer.signum(remote.length - installed.length);
+        }
+        return 0;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/pixart/messenger/services/UpdaterWebService.java b/src/main/java/de/pixart/messenger/services/UpdaterWebService.java
deleted file mode 100644
index 4e4a599ad..000000000
--- a/src/main/java/de/pixart/messenger/services/UpdaterWebService.java
+++ /dev/null
@@ -1,99 +0,0 @@
-package de.pixart.messenger.services;
-
-import android.app.IntentService;
-import android.content.Intent;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.util.Log;
-
-import org.apache.http.HttpResponse;
-import org.apache.http.HttpStatus;
-import org.apache.http.StatusLine;
-import org.apache.http.client.ClientProtocolException;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.conn.params.ConnManagerParams;
-import org.apache.http.impl.client.DefaultHttpClient;
-import org.apache.http.params.HttpConnectionParams;
-import org.apache.http.params.HttpParams;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-
-import de.pixart.messenger.Config;
-import de.pixart.messenger.R;
-import de.pixart.messenger.ui.UpdaterActivity.UpdateReceiver;
-
-public class UpdaterWebService extends IntentService {
-    public static final String REQUEST_STRING = "";
-    public static final String RESPONSE_MESSAGE = "";
-
-    private String URL = null;
-    public static final int REGISTRATION_TIMEOUT = Config.SOCKET_TIMEOUT * 1000;
-    public static final int WAIT_TIMEOUT = Config.CONNECT_TIMEOUT * 1000;
-
-    public UpdaterWebService() {
-        super("UpdaterWebService");
-    }
-
-    @Override
-    protected void onHandleIntent(Intent intent) {
-
-        String requestString = intent.getStringExtra(REQUEST_STRING);
-        Log.d(Config.LOGTAG, "AppUpdater: " + requestString);
-        String responseMessage;
-        PackageInfo pInfo = null;
-        try {
-            pInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
-        } catch (PackageManager.NameNotFoundException e) {
-            e.printStackTrace();
-        }
-        //get the app version Name for display
-        final String versionName = pInfo.versionName;
-
-        try {
-
-            URL = requestString;
-            HttpClient httpclient = new DefaultHttpClient();
-            HttpParams params = httpclient.getParams();
-
-            HttpConnectionParams.setConnectionTimeout(params, REGISTRATION_TIMEOUT);
-            HttpConnectionParams.setSoTimeout(params, WAIT_TIMEOUT);
-            ConnManagerParams.setTimeout(params, WAIT_TIMEOUT);
-
-            HttpGet httpGet = new HttpGet(URL);
-            httpGet.setHeader("User-Agent", getString(R.string.app_name) + " " + versionName);
-            HttpResponse response = httpclient.execute(httpGet);
-
-            StatusLine statusLine = response.getStatusLine();
-            Log.d(Config.LOGTAG, "AppUpdater: HTTP Status Code: " + statusLine.getStatusCode());
-            if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
-                ByteArrayOutputStream out = new ByteArrayOutputStream();
-                response.getEntity().writeTo(out);
-                out.close();
-                responseMessage = out.toString();
-            } else {
-                Log.e(Config.LOGTAG, "AppUpdater: HTTP1:" + statusLine.getReasonPhrase());
-                response.getEntity().getContent().close();
-                throw new IOException(statusLine.getReasonPhrase());
-            }
-
-        } catch (ClientProtocolException e) {
-            Log.e(Config.LOGTAG, "AppUpdater: HTTP2:" + e);
-            responseMessage = "";
-        } catch (IOException e) {
-            Log.e(Config.LOGTAG, "AppUpdater: HTTP3:" + e);
-            responseMessage = "";
-        } catch (Exception e) {
-            Log.e(Config.LOGTAG, "AppUpdater: HTTP4:" + e);
-            responseMessage = "";
-        }
-
-        Intent broadcastIntent = new Intent();
-        broadcastIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        broadcastIntent.setAction(UpdateReceiver.PROCESS_RESPONSE);
-        broadcastIntent.addCategory(Intent.CATEGORY_DEFAULT);
-        broadcastIntent.putExtra(RESPONSE_MESSAGE, responseMessage);
-        sendBroadcast(broadcastIntent);
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/de/pixart/messenger/ui/ConversationActivity.java b/src/main/java/de/pixart/messenger/ui/ConversationActivity.java
index f4c66fbb8..895ce5063 100644
--- a/src/main/java/de/pixart/messenger/ui/ConversationActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/ConversationActivity.java
@@ -71,6 +71,7 @@ import de.pixart.messenger.entities.MucOptions;
 import de.pixart.messenger.entities.Presence;
 import de.pixart.messenger.entities.Transferable;
 import de.pixart.messenger.persistance.FileBackend;
+import de.pixart.messenger.services.UpdateService;
 import de.pixart.messenger.services.XmppConnectionService;
 import de.pixart.messenger.services.XmppConnectionService.OnAccountUpdate;
 import de.pixart.messenger.services.XmppConnectionService.OnConversationUpdate;
@@ -382,16 +383,15 @@ public class ConversationActivity extends XmppActivity
         String PREFS_NAME = "UpdateTimeStamp";
         SharedPreferences UpdateTimeStamp = getApplicationContext().getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
         long lastUpdateTime = UpdateTimeStamp.getLong("lastUpdateTime", 0);
-        Log.d(Config.LOGTAG, "AppUpdater - LastUpdateTime: " + lastUpdateTime);
+        Log.d(Config.LOGTAG, "AppUpdater: LastUpdateTime: " + lastUpdateTime);
         if ((lastUpdateTime + (Config.UPDATE_CHECK_TIMER * 1000)) < System.currentTimeMillis()) {
             lastUpdateTime = System.currentTimeMillis();
             SharedPreferences.Editor editor = UpdateTimeStamp.edit();
             editor.putLong("lastUpdateTime", lastUpdateTime);
             editor.commit();
-            // run AppUpdater
-            Log.d(Config.LOGTAG, "AppUpdater - CurrentTime: " + lastUpdateTime);
-            Intent AppUpdater = new Intent(this, UpdaterActivity.class);
-            startActivity(AppUpdater);
+            Log.d(Config.LOGTAG, "AppUpdater: CurrentTime: " + lastUpdateTime);
+            UpdateService task = new UpdateService(this);
+            task.execute("false");
             Log.d(Config.LOGTAG, "AppUpdater started");
         } else {
             Log.d(Config.LOGTAG, "AppUpdater stopped");
diff --git a/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java b/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java
index d5a1a04f8..5ab90ca7f 100644
--- a/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/UpdaterActivity.java
@@ -3,71 +3,43 @@ package de.pixart.messenger.ui;
 import android.Manifest;
 import android.app.Activity;
 import android.app.AlertDialog;
-import android.app.DownloadManager;
-import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Environment;
 import android.support.v4.app.ActivityCompat;
 import android.util.Log;
-import android.view.WindowManager;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import org.json.JSONException;
-import org.json.JSONObject;
+import org.apache.http.util.ByteArrayBuffer;
 
+import java.io.BufferedInputStream;
 import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.List;
 
 import de.pixart.messenger.Config;
 import de.pixart.messenger.R;
 import de.pixart.messenger.persistance.FileBackend;
-import de.pixart.messenger.services.UpdaterWebService;
 
 public class UpdaterActivity extends Activity {
 
     static final private String FileName = "update.apk";
     String appURI = "";
-    private UpdateReceiver receiver = null;
-    private int versionCode = 0;
-    private String localVersion = null;
-    private DownloadManager downloadManager;
-    private long downloadReference;
-
-    BroadcastReceiver downloadReceiver = new BroadcastReceiver() {
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            if (intent == null) {
-                Toast.makeText(getApplicationContext(),
-                        getText(R.string.failed),
-                        Toast.LENGTH_LONG).show();
-                UpdaterActivity.this.finish();
-            }
-            //check if the broadcast message is for our Enqueued download
-            long referenceId = intent.getExtras().getLong(DownloadManager.EXTRA_DOWNLOAD_ID);
-            if (downloadReference == referenceId) {
-                File file = new File(FileBackend.getConversationsDirectory("Update", false), FileName);
-                //start the installation of the latest localVersion
-                Intent installIntent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
-                installIntent.setDataAndType(FileBackend.getUriForFile(UpdaterActivity.this, file), "application/vnd.android.package-archive");
-                installIntent.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true);
-                installIntent.putExtra(Intent.EXTRA_RETURN_RESULT, true);
-                installIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-                installIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                startActivity(installIntent);
-                UpdaterActivity.this.finish();
-            }
-        }
-    };
+    String changelog = "";
+    Integer filesize = 0;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -77,37 +49,80 @@ public class UpdaterActivity extends Activity {
         setContentView(R.layout.activity_updater);
         TextView textView = (TextView) findViewById(R.id.updater);
         textView.setText(R.string.update_info);
+    }
 
-        //Broadcast receiver for our Web Request
-        IntentFilter filter = new IntentFilter(UpdateReceiver.PROCESS_RESPONSE);
-        filter.addCategory(Intent.CATEGORY_DEFAULT);
-        receiver = new UpdateReceiver();
-        registerReceiver(receiver, filter);
-
-        //Broadcast receiver for the download manager (download complete)
-        registerReceiver(downloadReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
-
-        //check of internet is available before making a web service request
-        if (isNetworkAvailable(this)) {
-            Intent msgIntent = new Intent(this, UpdaterWebService.class);
-            msgIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-            msgIntent.putExtra(UpdaterWebService.REQUEST_STRING, Config.UPDATE_URL);
+    @Override
+    protected void onStart() {
+        super.onStart();
+        if (getIntent() != null && getIntent().getStringExtra("update").equals("PixArtMessenger_UpdateService")) {
+            try {
+                appURI = getIntent().getStringExtra("url");
+            } catch (Exception e) {
+                Toast.makeText(getApplicationContext(), getText(R.string.failed), Toast.LENGTH_LONG).show();
+                UpdaterActivity.this.finish();
+            }
+            try {
+                changelog = getIntent().getStringExtra("changelog");
+            } catch (Exception e) {
+                Toast.makeText(getApplicationContext(), getText(R.string.failed), Toast.LENGTH_LONG).show();
+                UpdaterActivity.this.finish();
+            }
+            //delete old downloaded localVersion files
+            File dir = new File(FileBackend.getConversationsDirectory("Update", false));
+            if (dir.isDirectory()) {
+                String[] children = dir.list();
+                for (String aChildren : children) {
+                    Log.d(Config.LOGTAG, "AppUpdater: delete old update files " + aChildren + " in " + dir);
+                    new File(dir, aChildren).delete();
+                }
+            }
 
-            Toast.makeText(getApplicationContext(),
-                    getText(R.string.checking_for_updates),
-                    Toast.LENGTH_SHORT).show();
-            startService(msgIntent);
+            //oh yeah we do need an upgrade, let the user know send an alert message
+            AlertDialog.Builder builder = new AlertDialog.Builder(UpdaterActivity.this);
+            builder.setCancelable(false);
+            builder.setMessage(getString(R.string.install_update))
+                    .setPositiveButton(R.string.update, new DialogInterface.OnClickListener() {
+                        //if the user agrees to upgrade
+                        public void onClick(DialogInterface dialog, int id) {
+                            Log.d(Config.LOGTAG, "AppUpdater: downloading " + FileName + " from " + appURI);
+                            //ask for permissions on devices >= SDK 23
+                            if (isStoragePermissionGranted() && isNetworkAvailable(getApplicationContext())) {
+                                //start downloading the file using the download manager
+                                DownloadFromUrl(appURI, FileName);
+                                Toast.makeText(getApplicationContext(), getText(R.string.download_started), Toast.LENGTH_LONG).show();
+                            } else {
+                                Log.d(Config.LOGTAG, "AppUpdater: failed - has storage permissions " + isStoragePermissionGranted() + " and internet " + isNetworkAvailable(getApplicationContext()));
+                            }
+                        }
+                    })
+                    .setNeutralButton(R.string.changelog, new DialogInterface.OnClickListener() {
+                        //open link to changelog
+                        public void onClick(DialogInterface dialog, int id) {
+                            Uri uri = Uri.parse("https://github.com/kriztan/Conversations/blob/master/CHANGELOG.md"); // missing 'http://' will cause crashed
+                            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                            startActivity(intent);
+                            //restart updater to show dialog again after coming back after opening changelog
+                            recreate();
+                        }
+                    })
+                    .setNegativeButton(R.string.remind_later, new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int id) {
+                            // User cancelled the dialog
+                            UpdaterActivity.this.finish();
+                        }
+                    });
+            //show the alert message
+            builder.create().show();
+        } else {
+            Toast.makeText(getApplicationContext(), getText(R.string.failed), Toast.LENGTH_LONG).show();
+            UpdaterActivity.this.finish();
         }
     }
 
     @Override
     public void onDestroy() {
-        //unregister your receivers
-        this.unregisterReceiver(receiver);
-        this.unregisterReceiver(downloadReceiver);
         super.onDestroy();
-        //enable touch events
-        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
     }
 
     @Override
@@ -120,6 +135,70 @@ public class UpdaterActivity extends Activity {
         super.onRestoreInstanceState(savedInstanceState);
     }
 
+    public void DownloadFromUrl(final String DownloadUrl, final String FileName) {
+        final Thread thread = new Thread(new Runnable() {
+
+            @Override
+            public void run() {
+                try {
+                    File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + FileBackend.getDirectoryName("Update", false));
+
+                    URL url = new URL(DownloadUrl);
+                    File file = new File(dir, FileName);
+                    Log.d(Config.LOGTAG, "AppUpdater: save file to " + file.toString());
+
+                    long startTime = System.currentTimeMillis();
+                    Log.d(Config.LOGTAG, "AppUpdater: download update from url: " + url + " to file name: " + file.toString());
+
+                    // Open a connection to that URL.
+                    URLConnection connection = url.openConnection();
+
+                    //Define InputStreams to read from the URLConnection.
+                    InputStream is = connection.getInputStream();
+                    BufferedInputStream bis = new BufferedInputStream(is);
+
+                    //Read file size
+                    List values = connection.getHeaderFields().get("content-Length");
+                    if (values != null && !values.isEmpty()) {
+                        String sLength = (String) values.get(0);
+                        if (sLength != null) {
+                            filesize = Integer.parseInt(sLength);
+                        }
+                    }
+                    //Read bytes to the Buffer until there is nothing more to read(-1).
+                    ByteArrayBuffer baf = new ByteArrayBuffer(5000);
+                    int current = 0;
+                    while ((current = bis.read()) != -1) {
+                        baf.append((byte) current);
+                    }
+
+                    // Convert the Bytes read to a String.
+                    FileOutputStream fos = new FileOutputStream(file);
+                    fos.write(baf.toByteArray());
+                    fos.flush();
+                    fos.close();
+                    Log.d(Config.LOGTAG, "AppUpdater: download ready in" + ((System.currentTimeMillis() - startTime) / 1000) + " sec");
+
+                    //start the installation of the latest localVersion
+                    Intent installIntent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
+                    installIntent.setDataAndType(FileBackend.getUriForFile(UpdaterActivity.this, file), "application/vnd.android.package-archive");
+                    installIntent.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true);
+                    installIntent.putExtra(Intent.EXTRA_RETURN_RESULT, true);
+                    installIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                    installIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+                    startActivity(installIntent);
+                    UpdaterActivity.this.finish();
+
+                } catch (MalformedURLException e) {
+                    e.printStackTrace();
+                } catch (IOException e) {
+                    Log.d(Config.LOGTAG, "AppUpdater: Error: " + e);
+                }
+            }
+        });
+        thread.start();
+    }
+
     //check for internet connection
     private boolean isNetworkAvailable(Context context) {
         ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
@@ -170,180 +249,4 @@ public class UpdaterActivity extends Activity {
         AlertDialog alert = builder.create();
         alert.show();
     }
-
-    /**
-     * Use this instead of String.compareTo() for a non-lexicographical
-     * comparison that works for version strings. e.g. "1.10".compareTo("1.6").
-     *
-     * @param str1 a string of ordinal numbers separated by decimal points.
-     * @param str2 a string of ordinal numbers separated by decimal points.
-     * @return The result is a negative integer if str1 is _numerically_ less than str2.
-     * The result is a positive integer if str1 is _numerically_ greater than str2.
-     * The result is zero if the strings are _numerically_ equal.
-     * @note It does not work if "1.10" is supposed to be equal to "1.10.0".
-     */
-    private int checkVersion(String remoteVersion, String installedVersion) {
-        String[] remote = null;
-        String[] installed = null;
-        String[] remoteV = null;
-        String[] installedV = null;
-        try {
-            installedV = installedVersion.split(" ");
-            Log.d(Config.LOGTAG, "Updater Version installed: " + installedV[0]);
-            installed = installedV[0].split("\\.");
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-        try {
-            remoteV = remoteVersion.split(" ");
-            if (installedV != null && installedV.length > 1) {
-                if (installedV[1] != null) {
-                    remoteV[0] = remoteV[0] + ".1";
-                }
-            }
-            Log.d(Config.LOGTAG, "Updater Version on server: " + remoteV[0]);
-            remote = remoteV[0].split("\\.");
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-        int i = 0;
-        // set index to first non-equal ordinal or length of shortest localVersion string
-        if (remote != null && installed != null) {
-            while (i < remote.length && i < installed.length && remote[i].equals(installed[i])) {
-                i++;
-            }
-            // compare first non-equal ordinal number
-            if (i < remote.length && i < installed.length) {
-                int diff = Integer.valueOf(remote[i]).compareTo(Integer.valueOf(installed[i]));
-                return Integer.signum(diff);
-            }
-            // the strings are equal or one string is a substring of the other
-            // e.g. "1.2.3" = "1.2.3" or "1.2.3" < "1.2.3.4"
-            return Integer.signum(remote.length - installed.length);
-        }
-        return 0;
-    }
-
-    //broadcast receiver to get notification when the web request finishes
-    public class UpdateReceiver extends BroadcastReceiver {
-
-        public static final String PROCESS_RESPONSE = "de.pixart.messenger.intent.action.PROCESS_RESPONSE";
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-
-            //disable touch events
-            getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
-                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
-
-            String responseMessage = intent.getStringExtra(UpdaterWebService.RESPONSE_MESSAGE);
-
-            if (responseMessage == "" || responseMessage.isEmpty() || responseMessage == null) {
-                Toast.makeText(getApplicationContext(),
-                        getText(R.string.failed),
-                        Toast.LENGTH_LONG).show();
-                UpdaterActivity.this.finish();
-            } else {
-                //parse the JSON reponse
-                JSONObject reponseObj;
-
-                try {
-                    //if the response was successful check further
-                    reponseObj = new JSONObject(responseMessage);
-                    boolean success = reponseObj.getBoolean("success");
-                    if (success) {
-                        //Overall information about the contents of a package
-                        //This corresponds to all of the information collected from AndroidManifest.xml.
-                        PackageInfo pInfo = null;
-                        try {
-                            pInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
-                        } catch (PackageManager.NameNotFoundException e) {
-                            e.printStackTrace();
-                        }
-                        //get the app localVersion Name for display
-                        String localVersion = pInfo.versionName;
-                        //get the latest localVersion from the JSON string
-                        int latestVersionCode = reponseObj.getInt("latestVersionCode");
-                        String remoteVersion = reponseObj.getString("latestVersion");
-                        String filesize = reponseObj.getString("filesize");
-                        String changelog = reponseObj.getString("changelog");
-                        //get the lastest application URI from the JSON string
-                        appURI = reponseObj.getString("appURI");
-                        //check if we need to upgrade?
-                        if (checkVersion(remoteVersion, localVersion) >= 1) {
-                            //delete old downloaded localVersion files
-                            File dir = new File(FileBackend.getConversationsDirectory("Update", false));
-                            if (dir.isDirectory()) {
-                                String[] children = dir.list();
-                                for (String aChildren : children) {
-                                    Log.d(Config.LOGTAG, "Updater delete old update files " + aChildren + " in " + dir);
-                                    new File(dir, aChildren).delete();
-                                }
-                            }
-                            //enable touch events
-                            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
-
-                            //oh yeah we do need an upgrade, let the user know send an alert message
-                            AlertDialog.Builder builder = new AlertDialog.Builder(UpdaterActivity.this);
-                            builder.setCancelable(false);
-                            String UpdateMessageInfo = getResources().getString(R.string.update_available);
-                            builder.setMessage(String.format(UpdateMessageInfo, remoteVersion, filesize, localVersion, changelog))
-                                    .setPositiveButton(R.string.update, new DialogInterface.OnClickListener() {
-                                        //if the user agrees to upgrade
-                                        public void onClick(DialogInterface dialog, int id) {
-                                            //disable touch events
-                                            getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
-                                                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
-                                            //ask for permissions on devices >= SDK 23
-                                            if (isStoragePermissionGranted()) {
-                                                //start downloading the file using the download manager
-                                                downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
-                                                Uri Download_Uri = Uri.parse(appURI);
-                                                DownloadManager.Request request = new DownloadManager.Request(Download_Uri);
-                                                request.setTitle("Pix-Art Messenger Update");
-                                                request.setDestinationInExternalPublicDir(FileBackend.getDirectoryName("Update", false), FileName);
-                                                downloadReference = downloadManager.enqueue(request);
-                                                Toast.makeText(getApplicationContext(),
-                                                        getText(R.string.download_started),
-                                                        Toast.LENGTH_LONG).show();
-                                            }
-                                        }
-                                    })
-                                    .setNeutralButton(R.string.changelog, new DialogInterface.OnClickListener() {
-                                        //open link to changelog
-                                        public void onClick(DialogInterface dialog, int id) {
-                                            Uri uri = Uri.parse("https://github.com/kriztan/Conversations/blob/master/CHANGELOG.md"); // missing 'http://' will cause crashed
-                                            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
-                                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-                                            startActivity(intent);
-                                            //restart updater to show dialog again after coming back after opening changelog
-                                            recreate();
-                                        }
-                                    })
-                                    .setNegativeButton(R.string.remind_later, new DialogInterface.OnClickListener() {
-                                        public void onClick(DialogInterface dialog, int id) {
-                                            // User cancelled the dialog
-                                            UpdaterActivity.this.finish();
-                                        }
-                                    });
-                            //show the alert message
-                            builder.create().show();
-                        } else {
-                            Toast.makeText(getApplicationContext(),
-                                    getText(R.string.no_update_available),
-                                    Toast.LENGTH_SHORT).show();
-                            UpdaterActivity.this.finish();
-                        }
-                    } else {
-                        Toast.makeText(getApplicationContext(),
-                                getText(R.string.failed),
-                                Toast.LENGTH_LONG).show();
-                        UpdaterActivity.this.finish();
-                    }
-                } catch (JSONException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-    }
 }
diff --git a/src/main/java/de/pixart/messenger/ui/XmppActivity.java b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
index e5b894322..bdf321dc3 100644
--- a/src/main/java/de/pixart/messenger/ui/XmppActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
@@ -79,6 +79,7 @@ import de.pixart.messenger.entities.Presences;
 import de.pixart.messenger.http.HttpConnectionManager;
 import de.pixart.messenger.services.AvatarService;
 import de.pixart.messenger.services.BarcodeProvider;
+import de.pixart.messenger.services.UpdateService;
 import de.pixart.messenger.services.XmppConnectionService;
 import de.pixart.messenger.services.XmppConnectionService.XmppConnectionBinder;
 import de.pixart.messenger.utils.CryptoHelper;
@@ -376,7 +377,8 @@ public abstract class XmppActivity extends Activity {
                 break;
             case R.id.action_check_updates:
                 if (xmppConnectionService.hasInternetConnection()) {
-                    startActivity(new Intent(this, UpdaterActivity.class));
+                    UpdateService task = new UpdateService(this);
+                    task.execute("true");
                 } else {
                     Toast.makeText(this, R.string.account_status_no_internet, Toast.LENGTH_LONG).show();
                 }
diff --git a/src/main/res/drawable-hdpi/ic_action_cancel.png b/src/main/res/drawable-hdpi/ic_action_cancel.png
deleted file mode 100644
index 5572c5248..000000000
--- a/src/main/res/drawable-hdpi/ic_action_cancel.png
+++ /dev/null
diff --git a/src/main/res/drawable-hdpi/ic_update_notification.png b/src/main/res/drawable-hdpi/ic_update_notification.png
new file mode 100644
index 000000000..b54ff5e20
--- /dev/null
+++ b/src/main/res/drawable-hdpi/ic_update_notification.png
diff --git a/src/main/res/drawable-mdpi/ic_action_cancel.png b/src/main/res/drawable-mdpi/ic_action_cancel.png
deleted file mode 100644
index 3de614668..000000000
--- a/src/main/res/drawable-mdpi/ic_action_cancel.png
+++ /dev/null
diff --git a/src/main/res/drawable-mdpi/ic_update_notification.png b/src/main/res/drawable-mdpi/ic_update_notification.png
new file mode 100644
index 000000000..3ebf650fb
--- /dev/null
+++ b/src/main/res/drawable-mdpi/ic_update_notification.png
diff --git a/src/main/res/drawable-xhdpi/ic_action_cancel.png b/src/main/res/drawable-xhdpi/ic_action_cancel.png
deleted file mode 100644
index 1e871a52c..000000000
--- a/src/main/res/drawable-xhdpi/ic_action_cancel.png
+++ /dev/null
diff --git a/src/main/res/drawable-xhdpi/ic_update_notification.png b/src/main/res/drawable-xhdpi/ic_update_notification.png
new file mode 100644
index 000000000..fd29feb75
--- /dev/null
+++ b/src/main/res/drawable-xhdpi/ic_update_notification.png
diff --git a/src/main/res/drawable-xxhdpi/ic_action_cancel.png b/src/main/res/drawable-xxhdpi/ic_action_cancel.png
deleted file mode 100644
index 8f1441277..000000000
--- a/src/main/res/drawable-xxhdpi/ic_action_cancel.png
+++ /dev/null
diff --git a/src/main/res/drawable-xxhdpi/ic_update_notification.png b/src/main/res/drawable-xxhdpi/ic_update_notification.png
new file mode 100644
index 000000000..b58ea3c2b
--- /dev/null
+++ b/src/main/res/drawable-xxhdpi/ic_update_notification.png
diff --git a/src/main/res/drawable-xxxhdpi/ic_notification.png b/src/main/res/drawable-xxxhdpi/ic_notification.png
index 614c85534..095522505 100644
--- a/src/main/res/drawable-xxxhdpi/ic_notification.png
+++ b/src/main/res/drawable-xxxhdpi/ic_notification.png
diff --git a/src/main/res/drawable-xxxhdpi/ic_update_notification.png b/src/main/res/drawable-xxxhdpi/ic_update_notification.png
new file mode 100644
index 000000000..2edf85941
--- /dev/null
+++ b/src/main/res/drawable-xxxhdpi/ic_update_notification.png
diff --git a/src/main/res/layout/activity_updater.xml b/src/main/res/layout/activity_updater.xml
index 8613b978a..2d8538537 100644
--- a/src/main/res/layout/activity_updater.xml
+++ b/src/main/res/layout/activity_updater.xml
@@ -22,7 +22,7 @@
         style="?android:attr/progressBarStyleLarge"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:id="@+id/progressBar"
+        android:id="@+id/UpdateProgressBar"
         android:layout_centerVertical="true"
         android:layout_centerHorizontal="true" />
 
diff --git a/src/main/res/values-de/strings.xml b/src/main/res/values-de/strings.xml
index 35baf7fb2..9d8293c3b 100644
--- a/src/main/res/values-de/strings.xml
+++ b/src/main/res/values-de/strings.xml
@@ -191,7 +191,6 @@
     <string name="otr_fingerprint">OTR-Fingerabdruck</string>
     <string name="omemo_fingerprint">OMEMO-Fingerabdruck</string>
     <string name="omemo_fingerprint_selected_message">OMEMO-Fingerabdruck der Nachricht</string>
-    <string name="this_device_omemo_fingerprint">Eigener OMEMO-Fingerabdruck</string>
     <string name="other_devices">Andere Geräte</string>
     <string name="trust_omemo_fingerprints">OMEMO-Fingerabdruck vertrauen</string>
     <string name="fetching_keys">Fingerabdrücke werden abgerufen …</string>
@@ -389,7 +388,6 @@
     <string name="vcard">Kontakt</string>
     <string name="received_x_file">%s empfangen</string>
     <string name="touch_to_open_conversations">Antippen, um Pix-Art Messenger zu öffnen</string>
-    <string name="disable_foreground_service">Vordergrund-Dienst deaktivieren</string>
     <string name="avatar_has_been_published">Profilbild wurde gespeichert</string>
     <string name="sending_x_file">%s wird gesendet</string>
     <string name="offering_x_file">%s wird angeboten</string>
@@ -439,17 +437,16 @@
     <string name="pref_use_white_background_summary">Empfangene Nachrichten als schwarzen Text auf weißem Hintergrund anzeigen</string>
     <string name="action_check_update">Auf Updates prüfen</string>
     <string name="remind_later">später</string>
-    <string name="checking_for_updates">Auf Pix-Art Messenger Updates prüfen</string>
     <string name="title_activity_updater">Update Dienst</string>
     <string name="update">aktualisieren</string>
-    <string name="update_available">Version %1$s ist verfügbar.\n\nDateigröße: %2$s\n\nJetzt auf Version %1$s aktualisieren?\n\n\n%4$s</string>
+    <string name="update_available">Version %1$s ist verfügbar.\n\nDateigröße: %2$s\n\nJetzt auf Version %1$s aktualisieren?</string>
     <string name="download_started">Download gestartet</string>
     <string name="no_update_available">Kein Update verfügbar</string>
     <string name="account_status_tor_unavailable">Tor-Netzwerk nicht verfügbar</string>
     <string name="account_status_bind_failure">Bindungsfehler</string>
     <string name="account_status_host_unknown">Host unbekannt</string>
     <string name="server_info_broken">Fehlerhaft</string>
-    <string name="update_info">Pix-Art Messenger prüft auf eine neuere Version. Wenn ein Update verfügbar ist, wirst du gefragt, ob du deine Version aktualisieren möchtest. Der Update Dienst lädt und installiert die neue Version automatisch.\n\nBitte warten…</string>
+    <string name="update_info">Pix-Art Messenger lädt und installiert die neue Version automatisch.\n\nBitte warten…</string>
     <string name="pref_presence_settings">Status</string>
     <string name="pref_away_when_screen_off">Abwesend bei abgeschaltetem Bildschirm</string>
     <string name="pref_away_when_screen_off_summary">Setzt deinen Status auf "abwesend", solange dein Bildschirm abgeschaltet ist</string>
@@ -676,7 +673,6 @@
     <string name="timeout_6_months">6 Monate</string>
     <string name="timeout_7_days">7 Tage</string>
     <string name="today">Heute</string>
-    <string name="start_chatting">Fange an zu schreiben…</string>
     <string name="pref_use_max_brightness">Maximale Helligkeit</string>
     <string name="pref_use_max_brightness_summary">Maximale Helligkeit aktivieren, wenn Videos oder Bilder im Vollbild betracht werden.</string>
     <string name="pref_video_compression">Videos komprimieren</string>
@@ -738,5 +734,7 @@
     <string name="server_info_partial">teilweise</string>
     <string name="pref_show_foreground_service">Nutze Vordergrunddienst</string>
     <string name="pref_show_foreground_service_summary">Einige Android Geräte schließen manche Apps nach einer gewissen Zeitspanne automatisch und du wirst keine neuen Nachrichten mehr empfangen können. Falls du solche Probleme hast, versuche den Vordergrunddienst zu aktivieren. Bitte beachte, dass dadurch ein permanente Eintrag in der Benachrichtigungsleiste erscheint.</string>
+    <string name="update_service">Pix-Art Messenger Update Dienst</string>
+    <string name="install_update">Update installieren?</string>
 
 </resources>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 86502dac1..d772c11a8 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -210,7 +210,6 @@
     <string name="omemo_fingerprint_x509">v\\OMEMO fingerprint</string>
     <string name="omemo_fingerprint_selected_message">OMEMO fingerprint of message</string>
     <string name="omemo_fingerprint_x509_selected_message">v\\OMEMO fingerprint of message</string>
-    <string name="this_device_omemo_fingerprint">Own OMEMO fingerprint</string>
     <string name="other_devices">Other devices</string>
     <string name="trust_omemo_fingerprints">Trust OMEMO Fingerprints</string>
     <string name="fetching_keys">Fetching keys…</string>
@@ -465,7 +464,6 @@
     <string name="apk">Android App</string>
     <string name="vcard">Contact</string>
     <string name="received_x_file">Received %s</string>
-    <string name="disable_foreground_service">Disable foreground service</string>
     <string name="touch_to_open_conversations">Touch to open Pix-Art Messenger</string>
     <string name="avatar_has_been_published">Avatar has been published!</string>
     <string name="sending_x_file">Sending %s</string>
@@ -516,9 +514,8 @@
     <string name="pref_use_white_background">Use white background</string>
     <string name="pref_use_white_background_summary">Show received messages as black text on a white background</string>
     <string name="action_check_update">Check for Updates</string>
-    <string name="title_activity_updater">Update Service</string>
-    <string name="update_available">Version %1$s is available.\n\nFilesize: %2$s\n\nUpdate to version %1$s now?\n\n\n%4$s</string>
-    <string name="checking_for_updates">Checking for Pix-Art Messenger updates</string>
+    <string name="title_activity_updater">Update service</string>
+    <string name="update_available">Version %1$s is available.\n\nFilesize: %2$s\n\nUpdate to version %1$s now?</string>
     <string name="remind_later">later</string>
     <string name="update">update</string>
     <string name="no_update_available">No update available</string>
@@ -531,7 +528,7 @@
     <string name="pref_away_when_screen_off">Away when screen is off</string>
     <string name="pref_away_when_screen_off_summary">Marks your resource as away when the screen is turned off</string>
     <string name="pref_dnd_on_silent_mode">\"Do not disturb\" in silent mode</string>
-    <string name="update_info">Pix-Art Messenger is checking for an update. If an update is available you will be asked, if you want to update your version. The update process is downloading and installing the new version automatically.\n\nPlease wait…</string>
+    <string name="update_info">Pix-Art Messenger is downloading and installing the new version automatically.\n\nPlease wait…</string>
     <string name="pref_dnd_on_silent_mode_summary">Marks your resource as \"Do not disturb\" when device is in silent mode</string>
     <string name="pref_treat_vibrate_as_silent">Treat vibrate as silent mode</string>
     <string name="pref_treat_vibrate_as_dnd_summary">Marks your resource as \"Do not disturb\" when device is on vibrate</string>
@@ -595,7 +592,7 @@
     <string name="battery_optimizations_enabled_dialog">Your device is doing some heavy battery optimizations on Pix-Art Messenger that might lead to delayed notifications or even message loss.\n\nYou will now be asked to disable those.</string>
     <string name="disable">Disable</string>
     <string name="selection_too_large">The selected area is too large</string>
-    <string name="cancel_update">Cancel update check?</string>
+    <string name="cancel_update">Cancel update?</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>
     <string name="no_accounts">(No activated accounts)</string>
@@ -739,7 +736,6 @@
     <string name="timeout_6_months">6 months</string>
     <string name="timeout_12_months">12 months</string>
     <string name="today">Today</string>
-    <string name="start_chatting">Start chatting…</string>
     <string name="pref_use_max_brightness_summary">Switch to maximum brightness while watching videos or images in fullscreen.</string>
     <string name="pref_use_max_brightness">Maximum brightness</string>
     <string name="block_jabber_id">Block Jabber-ID</string>
@@ -788,4 +784,6 @@
     <string name="server_info_partial">partial</string>
     <string name="pref_show_foreground_service_summary">Some Android devices will close some apps after a period of time and you wont be able to receive new messages. If you have such problems, try to activate the foreground service. But keep in mind, that you will have a permanent notification with this option checked.</string>
     <string name="pref_show_foreground_service">Use foreground service</string>
+    <string name="update_service">Pix-Art Messenger update service</string>
+    <string name="install_update">Install update?</string>
 </resources>