設置適用於Android的IMediaPlaybackService

Question

我在爲Android安裝IMediaPlaybackService時遇到問題。我被告知，我需要做的就是將其放入包裝中（在這種情況下，com.android.music），但是當我這樣做時，我無法讓我的項目生成。對於IMediaPlaybackService的代碼如下：

/* //device/samples/SampleCode/src/com/android/samples/app/RemoteServiceInterface.java 
** 
** Copyright 2007, The Android Open Source Project 
** 
** Licensed under the Apache License, Version 2.0 (the "License"); 
** you may not use this file except in compliance with the License. 
** You may obtain a copy of the License at 
** 
**  http://www.apache.org/licenses/LICENSE-2.0 
** 
** Unless required by applicable law or agreed to in writing, software 
** distributed under the License is distributed on an "AS IS" BASIS, 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License. 
*/ 

package com.android.music; 

interface IMediaPlaybackService 
{ 
    void openFile(String path, boolean oneShot); 
    void openFileAsync(String path); 
    void open(in long [] list, int position); 
    int getQueuePosition(); 
    boolean isPlaying(); 
    void stop(); 
    void pause(); 
    void play(); 
    void prev(); 
    void next(); 
    long duration(); 
    long position(); 
    long seek(long pos); 
    String getTrackName(); 
    String getAlbumName(); 
    long getAlbumId(); 
    String getArtistName(); 
    long getArtistId(); 
    void enqueue(in long [] list, int action); 
    long [] getQueue(); 
    void moveQueueItem(int from, int to); 
    void setQueuePosition(int index); 
    String getPath(); 
    long getAudioId(); 
    void setShuffleMode(int shufflemode); 
    int getShuffleMode(); 
    int removeTracks(int first, int last); 
    int removeTrack(long id); 
    void setRepeatMode(int repeatmode); 
    int getRepeatMode(); 
    int getMediaMountedCount(); 
} 

但是似乎有是阻止我建設我的項目，這個文件的幾個問題：

• 的「在」關鍵字導致Eclipse來給出錯誤。確切的錯誤是：Syntax error on token "long", delete this token.我不知道爲什麼有「在」關鍵字那裏。它們似乎不是Java中的關鍵字，它們是什麼？
• 發生的另一個錯誤是The type com.android.music.IMediaPlaybackService is not visible，可以通過公開接口來解決。
• 最後的錯誤是Stub cannot be resolved or is not a field.當我執行這行代碼：this.mService = IMediaPlaybackService.Stub.asInterface(service);，因爲IMediaPlaybackService中沒有存根。

其他人似乎已經能夠輕鬆克服這些問題，所以我錯過了什麼？這可能很簡單，我沒有看到，但我一直在摔跤比這更久。我需要弄亂我的項目設置嗎？

在此先感謝！

問候，celestialorb。

編輯：

所以我已經能夠建立我的項目，但現在我在與服務本身的問題。下面是我的MediaPlayerServiceConnection類的代碼：

import android.content.ComponentName; 
import android.content.ServiceConnection; 
import android.os.IBinder; 
import android.os.RemoteException; 
import android.util.Log; 

import com.android.music.IMediaPlaybackService; 

public class MediaPlayerServiceConnection implements ServiceConnection { 
    // Tag for debugging. 
    private static final String TAG = "MediaPlayerServiceConnection"; 

    // The service. 
    private IMediaPlaybackService mService; 

    @Override 
    public void onServiceConnected(ComponentName name, IBinder service) { 
     Log.i(TAG, "MediaPlaybackService is connected! Name: " + name.getClassName()); 

     // This is the important line. 
     this.mService = IMediaPlaybackService.Stub.asInterface(service); 

     // If all went well, then we can use the interface. 
     try { 
      Log.i(TAG, "Current track: " + this.mService.getTrackName()); 
      Log.i(TAG, "Artist: " + this.mService.getArtistName()); 
     } catch(RemoteException e) { e.printStackTrace(); } 
    } 

    @Override 
    public void onServiceDisconnected(ComponentName name) { 
     Log.i(TAG, "MediaPlaybackService disconnected!"); 
    } 
} 

...這是我的活動，結合服務的代碼，但onServiceConnected方法不會被調用，我在錯誤地試圖使用該服務？

// TESTING MEDIAPLAYBACK SERVICE 
Intent intent = new Intent(); 
intent.setClassName("com.android.music", "com.android.music.MediaPlaybackService"); 
MediaPlayerServiceConnection conn = new MediaPlayerServiceConnection(); 
this.bindService(intent, conn, Context.BIND_AUTO_CREATE); 
// END TEST 

Answer 1

我嘗試綁定到媒體播放器服務自己....從來沒有能夠。我只是在比嘗試使用Android的時間更短的時間內實現我自己的播放器服務...