onTaskRemoved of a Android Service is never being called ! Why?

问题:

I am stuck with a issue from last 2 days, I want to hit a api and show user a Toast when user swipe off the app from Background Task, I found that from service it is possible as onTaskRemoved is called when app is removed from background.

Code :

MyService.java

public class MyService extends Service {  private static final String TAG = MyService.class.getSimpleName(); Handler mHandler;  @Override public void onCreate() {     super.onCreate();     mHandler = new Handler(); }  @Nullable @Override public IBinder onBind(Intent intent) {     return null; }  @Override public int onStartCommand(Intent intent, int flags, int startId) {     Log.d(TAG, "onStartCommand: ");     mHandler.post(new Runnable() {         @Override         public void run() {             new ToastPoP(MyService.this).showLongToast("Service started");         }     });      return Service.START_STICKY; }  @Override public void onTaskRemoved(Intent rootIntent) {     super.onTaskRemoved(rootIntent);     Log.d(TAG, "onTaskRemoved: ");     mHandler.post(new Runnable() {         @Override         public void run() {             Toast.makeText(App.getInstance(), "Removed", Toast.LENGTH_SHORT).show();             // api call too         }      });     // for kitket     Intent restartService = new Intent(getApplicationContext(),             this.getClass());     restartService.setPackage(getPackageName());     PendingIntent restartServicePI = PendingIntent.getService(             getApplicationContext(), 1, restartService,             PendingIntent.FLAG_ONE_SHOT);     AlarmManager alarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);     alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePI);  }  @Override public void onDestroy() {     super.onDestroy();     Log.d(TAG, "onDestroy: "); } } 

and in Manifest i have added this :

 <service         android:name=".MyService"         android:stopWithTask="false"         >     </service> 

and started service in SplashScreen :

 Intent i = new Intent(this, MyService.class);     this.startService(i); 

Service is started well but onTaskRemoved is never called when i am removing app from Background. Why ? what i am doing wrong?

Note:

And Interesting result is this i am able to get Toast in some device but not in most of the devices and all device's have OS- Android 5.0

回答1:

Try this one

<service             android:name=".MyService"             android:enabled="true"             android:stopWithTask="false" /> 

Just replace Service.START_STICKY; to START_STICKY;

And you will able to call onTaskRemoved(Intent rootIntent) once app removed/clear from recent app list.

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