mars老师《Android开发视频教程》_01_15 handler的使用（二）视频源码

package mars.handler;

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

public class HandlerTest extends Activity {
private Handler handler = new Handler();
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// sendMessage();
//handler.post(r);
setContentView(R.layout.main);
Thread t = new Thread(r);
t.start();
System.out.println("activity--->" + Thread.currentThread().getId());
System.out.println("activityname--->" + Thread.currentThread().getName());
}

Runnable r = new Runnable(){

@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("handler--->" + Thread.currentThread().getId());
System.out.println("handlername--->" + Thread.currentThread().getName());
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

};

}

package mars.handler;

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

public class HandlerTest2 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//打印了当前线程的ID
System.out.println("Activity-->" + Thread.currentThread().getId());
//生成一个HandlerThread对象，实现了使用Looper来处理消息队列的功能，这个类由Android应用程序框架提供
HandlerThread handlerThread = new HandlerThread("handler_thread");
//在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
handlerThread.start();
MyHandler myHandler = new MyHandler(handlerThread.getLooper());
Message msg = myHandler.obtainMessage();
//将msg发送到目标对象，所谓的目标对象，就是生成该msg对象的handler对象
Bundle b = new Bundle();
b.putInt("age", 20);
b.putString("name", "Jhon");
msg.setData(b);
msg.sendToTarget();
}

class MyHandler extends Handler{
public MyHandler(){

}
public MyHandler(Looper looper){
super(looper);
}
@Override
public void handleMessage(Message msg) {
Bundle b = msg.getData();
int age = b.getInt("age");
String name = b.getString("name");
System.out.println("age is " + age + ", name is" + name);
System.out.println("Handler--->" + Thread.currentThread().getId());
System.out.println("handlerMessage");
}
}
}