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

 

Codepackage 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() {    @Overridepublic 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 exceptione.printStackTrace();}}};}