android学习笔记之handler（1）

这个程序证明了用handler.post(r);不能产生多线程，而用Thread t = new Thread(r);t.start();才是真正的多线程

 

Code

package tk.handertest2;



import android.os.Bundle;

import android.os.Handler;

import android.app.Activity;

import android.view.Menu;



public class MainActivity extends Activity {

private Handler handler = new Handler();

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        

        setContentView(R.layout.activity_main);

       // handler.post(r);

       Thread t = new Thread(r);

        t.start();

		System.out.println("Activity--->"+Thread.currentThread().getId());

		System.out.println("Activityname--->"+Thread.currentThread().getName());

    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.activity_main, menu);

        return true;

    }

    Runnable r=new Runnable() {

    	@Override

		public void run() {

			System.out.println("handler--->"+Thread.currentThread().getId());

			System.out.println("handlername--->"+Thread.currentThread().getName());

			try {

				Thread.sleep(10000);

			} catch (InterruptedException e) {

				// TODO: handle exception

				e.printStackTrace();

			}

		}

	};

}