HandlerThread

package jl.activity;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.os.Handler.Callback;

public class HandlerTest2 extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		//打印了当前线程的ID
		System.out.println("Activity-->" + Thread.currentThread().getId());
		
		//生成一个HandlerThread对象，实现了使用Looper来处理消息队列的功能，这个类由Android应用程序框架提供
		HandlerThread handlerThread = new HandlerThread("handler_thread");
		//在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
		handlerThread.start();
	//	MyHandler myHandler = new MyHandler(handlerThread.getLooper());
		Handler myHandler=new Handler(handlerThread.getLooper(),new Callback(){

			public boolean handleMessage(Message msg) {
				Bundle b = msg.getData();
				int age = b.getInt("age");
				String name = b.getString("name");
				System.out.println("age is " + age + ", name is" + name);
				System.out.println("Handler--->" + Thread.currentThread().getId());
				System.out.println("handlerMessage");
				return true;
			}
			
		});
		Message msg = myHandler.obtainMessage();
		
		//将msg发送到目标对象，所谓的目标对象，就是生成该msg对象的handler对象
		System.out.println("message target="+msg.getTarget().toString());
		Bundle b = new Bundle();
		b.putInt("age", 20);
		b.putString("name", "Jhon");
		msg.setData(b);
		msg.sendToTarget();
	}
	
//	class MyHandler extends Handler{
//		public MyHandler(){
//			
//		}
//		public MyHandler(Looper looper){
//			super(looper);
//		}
//		@Override
//		public void handleMessage(Message msg) {
//			Bundle b = msg.getData();
//			int age = b.getInt("age");
//			String name = b.getString("name");
//			System.out.println("age is " + age + ", name is" + name);
//			System.out.println("Handler--->" + Thread.currentThread().getId());
//			System.out.println("handlerMessage");
//		}
//	}
}