android开发教程之使用looper处理消息队列
代码如下:
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);
}
}
