Android IPC之Messenger浅谈

server端

package com.test.aidl;
public class MessengerService extends Service {
    private static final String TAG = "MessengerService";
    private static final int WHAT = 0x101;
    Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case WHAT:
                    //接受从客户端传来的消息
                    Bundle bundle= (Bundle) msg.obj;
                    String str = (String) bundle.get("str");
                    Log.e(TAG, "服务端已接受到客户端的消息");
                    Log.e(TAG, "消息是---->" + str);
                    //发送数据给客户端
                    Message message = Message.obtain();
                    Bundle bundle1= new Bundle();
                    bundle1.putString("str","我已经知道了，加油，看好你！");
                    message.obj = bundle1;
                    message.what=0x102;
                    try {
                        //向客户端发送消息
                        msg.replyTo.send(message);//首先获取从客户端传递的Messenger对象，然后调用该Messenger对象的send()方法
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                    break;
            }
        }
    };
    private Messenger messenger = new Messenger(mHandler);
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return messenger.getBinder();
    }
}

配置文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.test.aidl">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <service
            android:name=".MessengerService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.test.server.aidl"/>
            </intent-filter>
        </service>
    </application>

</manifest>

client端

package com.test.client;
public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    private static final int WHAT = 0x102;
    private boolean isConn;
    Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case WHAT:
                    //接受从服务端发送的消息
                    Bundle bundle= (Bundle) msg.obj;
                    String str = (String) bundle.get("str");
                    Log.e(TAG, "客户端服已接受到务端的消息");
                    Log.e(TAG, "消息是---->" + str);
                    break;
            }
        }
    };
    private Messenger mClientMessenger = new Messenger(mHandler);
    private Messenger mServiceMessenger;
    ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.e(TAG, "连接Service成功---->");
            mServiceMessenger = new Messenger(service);
            isConn = true;
            Message message = Message.obtain();
            Bundle bundle=new Bundle();
            bundle.putString("str","你好！我是程序猿！");
            message.obj=bundle;
            message.what = 0x101;
            message.replyTo = mClientMessenger;
            try {
                mServiceMessenger.send(message);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }
        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.e(TAG, "连接Service---->disconnected");
            mServiceMessenger = null;
            isConn = false;
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void send(View view){
        bindService();
    }
    /**
     * 绑定远程连接服务
     */
    private void bindService() {
        Intent intent = new Intent("com.test.server.aidl");
        intent.setPackage("com.test.aidl");
        bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (isConn) {
            unbindService(serviceConnection);
        }
    }
}

整理自：http://blog.youkuaiyun.com/zxw136511485/article/details/53168501