Android handler remove send message not working

Question

Android handler remove previous send message from the handler message queue. Remember I don't want to use removeCallbacks (Runnable r);

Send broadcast intents
- To send the message

      Intent i = new Intent(my_action);  
      sendBroadcast(i);  

- To cancel any previous message

Intent i = new Intent(my_action);  
i.putExtra("a","a"); 
sendBroadcast(i);

public class TestBroadCast extends BroadcastReceiver {

    Handler h = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            // Do my stuff
        }
    };
    Message msg = h.obtainMessage();
    @Override
    public void onReceive(Context context, Intent intent) {

        if ("a".equals(intent.getStringExtra("a"))){
            // Handle intent to cancel message
            msg.what = 1;
            h.removeMessages(1);
        } else {
            // Handle intent to do my stuff
            msg.what = 1;
            h.sendMessageDelayed(msg, 10000);
        }
    }
}

But after this removeMessages is not working.

Answer 1

You can't reuse a Message I've tried that in the past and it doesn't work, you should obtain a new one.

Remove:

Message msg = h.obtainMessage();

Modify:

else { 
        // Handle intent to do my stuff 
        Message msg = h.obtainMessage();
        msg.what = 1;
        h.sendMessageDelayed(msg, 10000);
    } 

You also should make your Handler static, I suspect that is the reason for your problems. The BroadcastReceiver may be short lives and be created and destroyed before your handler fires.