How to kill a PostDelayed Method in Android

Question

I used postedDelayed method to refresh my Activity, which works fine. But the problem is that even when I press the Back button postdelayed method call back the previous activity..

//handler for 30000 milli-secs post delay refreshment of the activity

mHandler.postDelayed(new Runnable() {
public void run() {
               dostuff();

        }
            }, 30000);
    }

protected void dostuff() {
Intent intent = getIntent();
finish();startActivity(intent);
Toast.makeText(getApplicationContext(), "refreshed", Toast.LENGTH_LONG).show();
}

public void onBackPressed() {
        super.onBackPressed();
        finish();
        mHandler.removeCallbacks(null);
        }

protected void onStop() {
            mHandler.removeCallbacks(null);
        super.onStop();
    }

http://stackoverflow.com/q/16050807/931982 .. duplicate of your own question .. Dont do that — stinepike, Apr 18 '13 at 03:29

score 6 · Answer 1 · answered Apr 18 '13 at 04:54

6

you just use this it may be help you

   Runnable runobj=new Runnable() {
public void run()
{
 dostuff();

 }
  };
 mHandler.postDelayed(runobj, 30000);
   }
public void onBackPressed() 
{
super.onBackPressed();
mHandler.removeCallbacks(runobj);
}

answered Apr 18 '13 at 04:54

Prabu

1,441
15
20

score 3 · Answer 2 · answered Apr 18 '13 at 03:31

A workaround for this is :

When doing the dostuff() method, just check whether the Activity.isFinising() and do. If it is finishing, just return.

When you back press, the activity will get finished and after that if the doStuff() executes, it will not do anything.

Raghunandan · Answer 3 · 2013-04-18T15:18:09.407

1

mHandler.removeCallbacks(null);. You are passing null as a parameter. Pass a Runnable onject . That should work.

public final void removeCallbacks (Runnable r)

Use the above.

Added in API level 1 Remove any pending posts of Runnable r that are in the message queue.

http://developer.android.com/reference/android/os/Handler.html#removeCallbacks%28java.lang.Runnable%29

Edit : Example

Runnable runnable = new Runnable() {
@Override
public void run() {
    // execute some code
}
};

Handler handler = new Handler();  
handler.postDelayed(runnable, 10000);
handler.removeCallbacks(runnable);

edited Apr 18 '13 at 15:18

answered Apr 18 '13 at 03:33

Raghunandan

132,755
26
225
256

2

It has to be specifically the instance of `Runnable` that was created. – dmon Apr 18 '13 at 04:27
@dmon agreed i edited my answer – Raghunandan Apr 18 '13 at 15:18

How to kill a PostDelayed Method in Android

3 Answers3