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

 

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();
			}
		}
	};
}