AndroidのHandler与Message

1.HandlerThread+Handler+Message

package com.bvin.study.message;

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

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        HandlerThread ht = new HandlerThread("HandlerThread");
        ht.start();
        
        Handler handler = new Handler(ht.getLooper(),new Callback(){

            @Override
            public boolean handleMessage(Message msg) {
                // TODO Auto-generated method stub
                setTitle((String)msg.obj);
                return true;
            }
            
        });
        
        Message msg = handler.obtainMessage();
        msg.obj = "就是我";
        msg.sendToTarget();//发送至生成嘴个消息的Handler
    }
}