Android service Message 전송하기(서비스 에서 액티비티 호출)

Android service Message 전송하기(서비스 에서 액티비티 호출) 

1. 콜백 aidl 작성

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package com.handstudio.android.networkaudio.services;   interface IMusicServiceCallback {     void nextMusicCallBack(); }

2. aidl 에 콜백 aidl Import 진행

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package com.handstudio.android.networkaudio.services;   import com.handstudio.android.networkaudio.services.IMusicServiceCallback;   interface IMusicService {    void registerCallback( IMusicServiceCallback callback );     void unregisterCallback ( IMusicServiceCallback callback );      }

 

 

​콜백 aidl 을 사용하기 위해서는 기존 aidl 에서의 register 와 unregister 가 필요 하다. 

 

​3. 서비스 작성 

 

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package com.handstudio.android.networkaudio.services;   import java.io.IOException;   import android.app.Service; import android.content.Intent; import android.media.MediaPlayer; import android.media.MediaPlayer.OnSeekCompleteListener; import android.net.Uri; import android.os.IBinder; import android.os.RemoteCallbackList; import android.os.RemoteException;   public class MusicService extends Service{       private Uri             musicUri;     private MediaPlayer     music;     private Boolean         isFromUser;       private RemoteCallbackList<IMusicServiceCallback> callbackList =             new RemoteCallbackList<IMusicServiceCallback> ();          @Override     public IBinder onBind(Intent intent) {         return serviceStub;     }       /**      * 서비스가 시작 되었을때 MediaPlayer 시작      */     @Override     public int onStartCommand(Intent intent, int flags, int startId) {         music = new MediaPlayer();         music.setOnSeekCompleteListener(mOnSeekCompleteListener);         return startId;     }       /**      * 생명 주기 에서 onDestroy 되었을때 MediaPlayer 정지      */     @Override     public void onDestroy (){         super.onDestroy();         music.stop();     }       public IMusicService.Stub serviceStub = new IMusicService.Stub() {           /**          * MediaPlayer 에 노래를 준비          */         @Override         public void settingMusic(String uriString) throws RemoteException {             try {                 musicUri = Uri.parse(uriString);                 music.reset();                 //음악 불러오기                 music.setDataSource(MusicService.this, musicUri);                 music.prepare();             } catch (IllegalArgumentException e1) {                 e1.printStackTrace();             } catch (SecurityException e1) {                 e1.printStackTrace();             } catch (IllegalStateException e1) {                 e1.printStackTrace();             } catch (IOException e1) {                 e1.printStackTrace();             }         }           /**          * 음악 재생          */         @Override         public void playMusic() throws RemoteException {             try {                 music.start();                 music.setLooping(true);             } catch (IllegalArgumentException e) {                 e.printStackTrace();             } catch (SecurityException e) {                 e.printStackTrace();             } catch (IllegalStateException e) {                 e.printStackTrace();             }           }           @Override         public boolean isPlaying() throws RemoteException {             //상태 체크             return music.isPlaying();         }         @Override         public void pauseMusic() throws RemoteException {             //상태 정지             music.pause();         }         @Override         public int getDuration() throws RemoteException {             //음악 시간             return music.getDuration();         }         @Override         public void seekTo(int progress) throws RemoteException {             // 음악 이동             music.seekTo(progress);         }         @Override         public void getFromUser(boolean isFormuserData) throws RemoteException {             // 시크바 터치 상태             isFromUser = isFormuserData;         }         @Override         public int getCurrentPosition() throws RemoteException {             // 음악의 현재 시간             return music.getCurrentPosition();         }         @Override         public void registerCallback(IMusicServiceCallback callback)throws RemoteException {             callbackList.register(callback);         }         @Override         public void unregisterCallback(IMusicServiceCallback callback)throws RemoteException {             callbackList.unregister(callback);         }     };          /**      * MediaPlayer 노래 시간이 끝났을 경우 불리는 Listener      */     OnSeekCompleteListener mOnSeekCompleteListener = new OnSeekCompleteListener(){         @Override         public void onSeekComplete(MediaPlayer music) {             // 노래가 끝나는 시점 분기친이유는 onSeekComplete 가 시크바 터치시에도 동작때문             if(!isFromUser){                 int cnt = callbackList.beginBroadcast();                 for (int i = 0 ; i < cnt ; i++ ){                     try {                         callbackList.getBroadcastItem(i).nextMusicCallBack();                     } catch (RemoteException e) {                         e.printStackTrace();                     }                 }                 callbackList.finishBroadcast();             }         }     };   }

빨간색 코드가 핵심 코드 이다 . 

3. 액티비티 코드

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/**      * Bind 되는 시점에 호출      */     private ServiceConnection conn = new ServiceConnection (){         public void onServiceDisconnected(ComponentName name){}         @Override         public void onServiceConnected(ComponentName name, IBinder service) {             musicService = IMusicService.Stub.asInterface(service);             try{                 musicService.registerCallback(callback);             }             catch ( Exception ex ) {}              //노래 셋팅             musicPlayerService.settingMusic(musicService,musicUri);             seekBarInit();         }     };   /**      * MusicService 쪽에서 Music onSeekComplete 가 호출 되는 시점에 Callback 메서드가 호출된다      * 즉 , 노래가 끝났을때 onSeekComplete 가 호출되어 아래 하단의 Callback 메서드에서       * 다음 곡으로 전환해준다.      */     private IMusicServiceCallback callback = new IMusicServiceCallback.Stub()      {         @Override         public void nextMusicCallBack() throws RemoteException {             nextMusic();         }     };   @Override     public void onDestroy() {         super.onDestroy();         try{// 콜백 해제             musicService.unregisterCallback(callback);         }         catch ( Exception ex ) {}         //서비스 해제         unbindService(conn);         stopService(serviceIntent);         super.onDestroy();     }

 

 

​서비스가 바인드 되는 시점에 콜백 aidl 을 등록 한다 . 

등록이 완료 되면 서비스에서 nextMusicCallBack​ 이 호출 되면 callback 메서드가 호출된다 .

마지막으로 서비스가 종료 되는 시점인 Destroy 에서 콜백 aidl 을 해지 시켜 주면 된다.