how to stop Handler in Android?

Question

In My Application my handler doesn't stop. How can I stop the handler?
It continues to start after closing the activity. What can i do?

the code is :

 handler = new Handler()
        {
            @Override
            public void handleMessage(Message msg) 
            {
                // TODO Auto-generated method stub
                super.handleMessage(msg);
                if(i<max)
                {
                    evnetChangedisplay(i);
                    i++;
                        handler.sendEmptyMessageDelayed(0, 5000);
                    }
                else
                    {
                        i = 0;
                        handler.sendEmptyMessageDelayed(0,0000);
                    }
                }
        };
handler.sendEmptyMessageDelayed(0,000);

Answer 1

It sounds like the activity finishes its lifecycle before the Handler executes the code. You can manage a handler.post(runnable) by creating an instance member for the handler and runnable, then managing the handler in the Activity Lifecycle methods.

private Handler myHandler;
private Runnable myRunnable = new Runnable() {
    @Override
    public void run() {
        //Do Something
    }
};

Start the runnable with handler.post.

protected void onStart() {
    super.onStart();
    myHandler = new Handler();
    myHandler.post(myRunnable);

}

If the runnable hasn't executed by the time onStop is called, we don't want to run it. Remove the callback in the onStop method:

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