java，

java，

package com.test;

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

public class TestHandler extends Activity {
/** Called when the activity is first created. */


// myHandler tt=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// myHandler tt=new myHandler();

Worker mWork = new Worker("test here");

}


}


class myHandler extends Handler{
private static final int OVERRIDE_URL = 0;
private final Object mLock = new Object();
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
System.out.println("==========msg is "+msg);
synchronized (mLock) {
mLock.notifyAll();
}

}

public myHandler(){
Message msg = obtainMessage(OVERRIDE_URL);
System.out.println("-----------------one");
synchronized (mLock) {
sendMessage(msg);
try {
System.out.println("-----------------two");
mLock.wait();
} catch (InterruptedException e) {
}
}
System.out.println("----------------three");

}

}




class Worker implements Runnable {
private final Object mLock = new Object();
private Looper mLooper;

/**
* Creates a worker thread with the given name. The thread
* then runs a {@link android.os.Looper}.
* @param name A name for the new thread

*/
Worker(String name) {
Thread t = new Thread(null, this);
t.setPriority(Thread.MIN_PRIORITY);
t.start();
synchronized (mLock) {
// while (mLooper == null) {
try {
System.out.println("------------here wait 1 ------------");
mLock.wait();
} catch (InterruptedException ex) {
// }
}
}

System.out.println("------------here wait 3 ------------");
}

// public Looper getLooper() {
// return mLooper;
// }

public void run() {
synchronized (mLock) {
// Looper.prepare();
// mLooper = Looper.myLooper();
mLock.notifyAll();
System.out.println("------------here wait 2 ------------");
}
// Looper.loop();

}

// public void quit() {
// mLooper.quit();
// }
}