如何停止handler

Question

写了个程序，点击发送按钮的时候给主handler发送消息，主handler接收到消息后处理，处理后给子线程handler发送消息，子线程handler接收到消息后处理完再给主handler发送消息。如此循环。在点击停止按钮的事件中写了handler.removeMessages(1);来移除handler，不过多次点击无效。log日志一直循环打印。求大神指点停止handler消息的方法。

public class FourActivity extends Activity implements OnClickListener{

private Button btn_send;

private Button btn_stop;

private Handler threadHandler;

//创建主线程的handler

private Handler handler = new Handler(){

public void handleMessage(android.os.Message msg) {

Message message = new Message();

System.out.println("main handler");

//向子线程发送消息

threadHandler.sendMessageDelayed(message, 1000);

};

};

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.four_activity);

btn_send = (Button)findViewById(R.id.button1);

btn_stop = (Button)findViewById(R.id.button2);

btn_send.setOnClickListener(this);

btn_stop.setOnClickListener(this);

HandlerThread ht = new HandlerThread("handlerThread");

ht.start();

//创建子线程的handler

threadHandler = new Handler(ht.getLooper()){

public void handleMessage(Message msg) {

Message message = new Message();

System.out.println("thread handler");

//向主线程发送消息

handler.sendMessageDelayed(message, 1000);

};

};

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

switch (v.getId()) {

case R.id.button1:

handler.sendEmptyMessage(1);

break;

case R.id.button2:

handler.removeMessages(1);

break;

default:

break;

}

}

}

Answer 1

既然你handler.removeMessages(1);那么也应该sendEmptyMessageDelayed(1, 1000)可以试试看行不行.Remove any pending posts of messages with code 'what' that are in the message queue.