验证handler和Activity是在同一个线程中执行

package com.lzr;
////验证handler和Activity是在同一个线程中执行

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;

public class Handlertest extends Activity {
    /** Called when the activity is first created. */
	Handler handler=new Handler();
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        
        ///普通执行线程的方法
        //Thread t=new Thread();
        //t.start();
        
      ///用post()启动线程,直接执run()方法
        handler.post(r);
        setContentView(R.layout.main);
        
        System.out.println("Activity--->"+Thread.currentThread().getId());
        System.out.println("activityname--->"+Thread.currentThread().getName());
        
        
    }
    Runnable r=new Runnable()
    {

		@Override
		public void run() {
	        System.out.println("Activity--->"+Thread.currentThread().getId());
	        System.out.println("activityname--->"+Thread.currentThread().getName());
	        try {
	        	///休眠5秒后启动线程
				Thread.sleep(5000);
			} catch (InterruptedException e) {
				// TODO: handle exception
				e.printStackTrace();
			}
		}
    
    	
    };
    
}