package com.yanjun; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.HandlerThread; import android.os.Looper; import android.os.Message; public class HandlerActivity extends Activity {   @Override   public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.main);       // 通过HandlerThread对象来实现使用looper处理消息队列的功能     HandlerThread handlerThread = new HandlerThread("handlerThread");     // 使线程运行必须调用start()     handlerThread.start();     MyHandler myHandler = new MyHandler(handlerThread.getLooper());     Message message = myHandler.obtainMessage();     // 把message发送到myHandler.obtainMessage()目标处，即谁调用的就发送给谁     Bundle bundle = new Bundle();     // 通过bundle添加数据     bundle.putInt("age", 10);     bundle.putString("name", "john");     // 将bundle信息添加进去     message.setData(bundle);     message.sendToTarget();   }   class MyHandler extends Handler {     public MyHandler(Looper looper) {       super(looper);       // TODO Auto-generated constructor stub     }     @Override     public void handleMessage(Message msg) {       Bundle bundle = msg.getData();       int age = bundle.getInt("age");       String name = bundle.getString("name");       System.out.println("年龄" + age + "名字" + name);           }   }