Show notification while syncthing is active (closes #136).

src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingRunnable.java

@@ -84,7 +84,8 @@ public class SyncthingRunnable implements Runnable {
                         .setAutoCancel(true)
                         .setOnlyAlertOnce(true);
                 Notification n = new NotificationCompat.BigTextStyle(b)
-                        .bigText(mContext.getString(R.string.binary_crashed_message, ret)).build();
+                        .bigText(mContext.getString(R.string.binary_crashed_message, ret))
+                        .build();
                 NotificationManager nm = (NotificationManager)
                         mContext.getSystemService(Context.NOTIFICATION_SERVICE);
                 nm.notify(NOTIFICATION_CRASHED, n);

src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingService.java

@@ -2,6 +2,9 @@ package com.nutomic.syncthingandroid.syncthing;
 
 import android.app.Activity;
 import android.app.AlertDialog;
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.app.Service;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -11,10 +14,12 @@ import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.IBinder;
 import android.preference.PreferenceManager;
+import android.support.v4.app.NotificationCompat;
 import android.util.Log;
 import android.util.Pair;
 
 import com.nutomic.syncthingandroid.R;
+import com.nutomic.syncthingandroid.activities.MainActivity;
 import com.nutomic.syncthingandroid.activities.SettingsActivity;
 import com.nutomic.syncthingandroid.util.ConfigXml;
 import com.nutomic.syncthingandroid.util.FolderObserver;
@@ -64,6 +69,8 @@ public class SyncthingService extends Service {
 
     public static final String PREF_SYNC_ONLY_CHARGING = "sync_only_charging";
 
+    private static final int NOTIFICATION_ACTIVE = 1;
+
     private ConfigXml mConfig;
 
     private RestApi mApi;
@@ -159,6 +166,8 @@ public class SyncthingService extends Service {
                     (mDeviceStateHolder.isWifiConnected() || !prefStopMobileData);
         }
 
+        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+
         // Start syncthing.
         if (shouldRun) {
             if (mCurrentState == State.ACTIVE || mCurrentState == State.STARTING) {
@@ -177,6 +186,14 @@ public class SyncthingService extends Service {
             new PollWebGuiAvailableTaskImpl().execute(mConfig.getWebGuiUrl());
             new Thread(new SyncthingRunnable(
                     this, getApplicationInfo().dataDir + "/" + BINARY_NAME)).start();
+            Notification n = new NotificationCompat.Builder(this)
+                    .setContentTitle(getString(R.string.syncthing_active))
+                    .setSmallIcon(R.drawable.ic_launcher)
+                    .setPriority(NotificationCompat.PRIORITY_MIN)
+                    .setContentIntent(PendingIntent.getActivity(this, 0,
+                            new Intent(this, MainActivity.class), 0))
+                    .build();
+            nm.notify(NOTIFICATION_ACTIVE, n);
         }
         // Stop syncthing.
         else {
@@ -196,6 +213,7 @@ public class SyncthingService extends Service {
                 }
                 mObservers.clear();
             }
+            nm.cancel(NOTIFICATION_ACTIVE);
         }
         onApiChange();
     }
@@ -299,6 +317,8 @@ public class SyncthingService extends Service {
         if (mApi != null) {
             mApi.shutdown();
         }
+        NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
+        nm.cancel(NOTIFICATION_ACTIVE);
     }
 
     /**

src/main/res/values/strings.xml

@@ -270,6 +270,9 @@ If this error persists, try restarting your device.</string>
     <!-- Button text on the "syncthing disabled" dialog, used as menu item to stop syncthing service if "always_run_in_background" is true -->
     <string name="exit">Exit</string>
 
+    <!-- Title of the notification shown while syncthing is running and enabled -->
+    <string name="syncthing_active">Syncthing is running</string>
+
     <!-- RestApi -->