android - Which function is called when application is removed from task manager

Question

I need to make status of user offline. When I press home button onStop() is called, that's fine. When I press back button onDestroy() is invoked. But when I close the app from recent apps by swiping it, onStop() or onDestroy() isn't called.

I need to know when the app is closed from recent apps to do something (e.g make user offline).

Answer 1

1. Make a service :

   public class MyService extends Service {
   private DefaultBinder mBinder;
   private AlarmManager  alarmManager ;
   private PendingIntent alarmIntent;
   
   private void setAlarmIntent(PendingIntent alarmIntent){
   this.alarmIntent=alarmIntent;
   }
   
   public void onCreate() {
   alarmManager (AlarmManager)getSystemService(Context.ALARM_SERVICE);
   mBinder = new DefaultBinder(this);
   }
   
    @Override
    public IBinder onBind(Intent intent) {
     return mBinder;
    }
   
    public void onTaskRemoved (Intent rootIntent){
    alarmManager.cancel(alarmIntent);
    this.stopSelf();
   }
   }
   

2. Make a custom class :

   public class DefaultBinder extends Binder {
       MyService s;
   
       public DefaultBinder( MyService s) {
           this.s = s;
       }
   
       public MyService getService() {
           return s;
       }
   }
   

3. Add to your activity :

   MyService service;
   protected ServiceConnection mConnection = new ServiceConnection() {
       public void onServiceConnected(ComponentName className, IBinder binder) {
   service = ((DefaultBinder) binder).getService();
   service.setAlarmIntent(pIntent);
       }
   
       public void onServiceDisconnected(ComponentName className) {
           service = null;
       }
           };
   
   protected void onResume() {
       super.onResume();
       bindService(new Intent(this, MainService.class), mConnection,
               Context.BIND_AUTO_CREATE);
   }
   
   @Override
   protected void onStop() {
       super.onStop();
   
       if (mConnection != null) {
           try {
               unbindService(mConnection);
           } catch (Exception e) {}
       }
   }