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 :

Answer 1

Consider:

private Handler myHandler= new Handler(){
        @Override
        public void  handleMessage(Message msg){        
            switch(msg.what){
                case 0:
                    this.removeMessages(0);
                    messageSendingCodeWhat0();
                 break;
                default:
                    super.handleMessage(msg);
                    break;
            }
        }
    };