AIDL的简单运用实现

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AIDL：Android接口自定义语言，进程之间的通讯
下面运用AIDL实现两个应用之间简单的通讯（一个客户端应用调用另一个应用的服务）
（一）建一个工程BService，在包下面建一个文件IMusicPlayer.aidl（与接口名相同）

package com.example.bservice; interface IMusicPlayer {    void playMusic(String path);}

（二）写一个服务类MusicPlayerService

package com.example.bservice;import android.app.Service;import android.content.Intent;import android.os.Handler;import android.os.IBinder;import android.os.RemoteException;import android.widget.Toast;import com.example.bservice.IMusicPlayer.Stub;public class MusicPlayerService extends Service {    private Handler mHandler = new Handler();    private ServiceBind serviceBind = new ServiceBind();    public class ServiceBind extends Stub{        @Override        public void playMusic(String path) throws RemoteException {            mHandler.post(new Runnable() {                @Override                public void run() {                    Toast.makeText(MusicPlayerService.this, "调用成功", Toast.LENGTH_SHORT).show();                }            });        }    }    @Override    public IBinder onBind(Intent arg0) {        return serviceBind;    }}

（三）在AndroidManifest里注册服务和action（用于隐式调用）

<service android:name="com.example.bservice.MusicPlayerService">            <intent-filter >                <action android:name="com.example.bservice.MUSIC_PLAYER"/>            </intent-filter>        </service>

（四）建一个工程AClient，把工程BService的包复制到AClient的src下，只要aidl文件，看到gen里生成了相同的包名既可
这里写图片描述
（五）写一个Activity

package com.example.aclient;import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.os.RemoteException;import android.view.View;import com.example.bservice.IMusicPlayer;public class MainActivity extends Activity {    private IMusicPlayer mIMusicPlayer;//声明接口    private ServiceConnection connection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName arg0) {            mIMusicPlayer = null;        }        @Override        public void onServiceConnected(ComponentName arg0, IBinder arg1) {            mIMusicPlayer = IMusicPlayer.Stub.asInterface(arg1);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //绑定服务        Intent intent = new Intent();        intent.setAction("com.example.bservice.MUSIC_PLAYER");        bindService(intent, connection, BIND_AUTO_CREATE);    }    //按键点击事件    public void onBtnClick(View v){        try {            mIMusicPlayer.playMusic("");        } catch (RemoteException e) {            e.printStackTrace();        }    }    @Override    protected void onDestroy() {        super.onDestroy();        if (connection != null) {            unbindService(connection);//解除绑定            connection = null;        }    }}

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