messenger进程之间的通讯

package com.animee.messenger_server;

import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.util.Log;

public class MyService extends Service {
public MyService() {
}
//   2. 创建信息的处理器对象Handler, 处理客户端返回的信息(Message)
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
//      接受客户端传来的信息
int arg1 = msg.arg1;
int arg2 = msg.arg2;
Log.i("tag11","服务器端接受到的内容：arg1=="+arg1+",arg2=="+arg2);
Messenger clientMessenger = msg.replyTo;

Message mess = new Message();
mess.arg1 = 88;
mess.arg2 = 66;
try {
clientMessenger.send(mess);
} catch (RemoteException e) {
e.printStackTrace();
}
}
};
//    1.创建一个信使对象
Messenger serverMessenger = new Messenger(handler);
@Override
public IBinder onBind(Intent intent) {
// 3.在onBind() 方法中, 返回IBinder对象, messenger.getBinder();
return  serverMessenger.getBinder();
}
}

package com.animee.messenger_client;

import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends AppCompatActivity {
private ServiceConn conn;

private Messenger serverMessenger;
private Messenger clientMessenger;
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
int arg1 = msg.arg1;
int arg2 = msg.arg2;

Log.i("tag12","客户端接受服务器的信息：arg1="+arg1+",arg2=="+arg2);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
conn = new ServiceConn();
clientMessenger = new Messenger(handler);
}

@Override
protected void onStart() {
super.onStart();
//       1. 绑定服务
Intent intent = new Intent();
//        隐士意图跳转
intent.setAction("com.animee.service");
//        隐士意图跳转，通过messenger跨进程通信，5.0之后要求必须指定服务器所属的包名
intent.setPackage("com.animee.messenger_server");
bindService(intent,conn,BIND_AUTO_CREATE);
}

@Override
protected void onDestroy() {
super.onDestroy();
unbindService(conn);
}
//3.按钮的点击事件，发送数据到服务器端
public void send(View view) {
Message message = Message.obtain();
message.arg1 = 100;
message.arg2 = 76;
//        将客户端的信使对象，存放到message信息当中
message.replyTo = clientMessenger;
try {
serverMessenger.send(message);
} catch (RemoteException e) {
e.printStackTrace();
}
}

class ServiceConn implements ServiceConnection{

@Override
public void onServiceConnected(ComponentName name, IBinder service) {
//            2.如果绑定成功后, 在ServiceConnection中的onServiceConnected() 方法中, 得到服务器的信使对象
serverMessenger = new Messenger(service);
}

@Override
public void onServiceDisconnected(ComponentName name) {

}
}
}