IPC基础概念介绍第三篇（Messenger）

public static class MessengerHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 100:
Log.d("yaohui", msg.getData().getString("key"));
Messenger sendMessenger = msg.replyTo;
Message message = Message.obtain(null, 200);
Bundle bundle = new Bundle();
bundle.putString("key", "en");
message.setData(bundle);
try {
sendMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
}
break;

default:
super.handleMessage(msg);
}
}
}

private Messenger mReveiverMessenger = new Messenger(new MessengerHandler());

public MyService2() {
}

@Override
public IBinder onBind(Intent intent) {
return mReveiverMessenger.getBinder();
}

private Messenger mSendMessenger;
private Messenger mReveiverMessenger = new Messenger(new MessengerHandler());

private static class MessengerHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 200:
Log.d("yaohui", msg.getData().getString("key"));
break;

default:
super.handleMessage(msg);
}
}
}

private ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
mSendMessenger = new Messenger(service);
Message message = Message.obtain(null, 100);
Bundle  bundle  = new Bundle();
bundle.putString("key", "haha");
message.setData(bundle);
message.replyTo = mReveiverMessenger;
try {
mSendMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
}
}

@Override
public void onServiceDisconnected(ComponentName name) {

}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

public void a(View v) {
bindService(new Intent(this, MyService2.class), mServiceConnection, Context.BIND_AUTO_CREATE);
}