主线程：

//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(handlerThrea

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();

 

其他进程：

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");

}

}