Stop vibrating onDestroy

Question

I have an activity that vibrates the phone for 9 seconds after it starts. I want the vibration action to be canceled when the activity leaves the foreground. Here is my current code:

     Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        public void run() {
            // change image
             screen.setImageResource(R.drawable.yama);

             vibrateMe();
        }
    }, 9000);



        }


public void vibrateMe() {


    Vibrator vibrate = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);

    vibrate.vibrate(2000);
}


public void stopVibrating(Vibrator vibrate) {

    vibrate.cancel();
}

@Override
  public void onDestroy() {
    super.onDestroy();


}

}

If you want to stop when the user leaves your Activity, you want to override `onPause()` instead; `onDestroy()` might not necessarily be called. I still don't see what the problem is though. — A--C, Jan 07 '13 at 21:45
when i leave the app the phone still vibrates after 9 seconds ! This is the problem :D — A.Jouni, Jan 07 '13 at 21:54

score 2 · Accepted Answer · edited May 23 '17 at 12:04

2

You want to cancel your runnable? There are 2 options:

you can cancel all your delayed runnables with handler.removeCallbacksAndMessages(null)
you should save ref to runnable (Runnable vibrateRunnable = new Runnable() ... ) and then remove it if needed with handler.removeCallbacks(vibrateRunnable)

edited May 23 '17 at 12:04

Community

1
1

answered Jan 07 '13 at 21:56

Leonidos

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score 0 · Answer 2 · answered Jan 07 '13 at 22:21

You can cancel all CallBacks and Messages using removeCallbacksAndMessages();

public final void removeCallbacksAndMessages (Object token)

Added in API level 1 Remove any pending posts of callbacks and sent messages whose obj is token. If token is null, all callbacks and messages will be removed.

Stop vibrating onDestroy

2 Answers2