关于Google Play商店中obb文件的加载

public static String FATE_OBB_PATH = "";

public String getObbFileName() {
	PackageInfo info = null;
	try {
		info = super.getPackageManager().getPackageInfo(super.getPackageName(), 0);
		String fileName = "main." + info.versionCode + "." + getPackageName() + ".obb";

		return fileName;
	} catch (PackageManager.NameNotFoundException e) {
		e.printStackTrace();
	}
	return "";
}
public String getVirtualObbFileFullpath(){
	File sdcardDir = Environment.getExternalStorageDirectory();
	String _path = getObbDir().getPath() + "/" + getObbFileName();
	Log.e("===_path===", _path);
	return _path;
}

protected void onCreate(Bundle savedInstanceState){
	Log.w("uuuuuuuuuu","onCreate");

	FATE_OBB_PATH = getVirtualObbFileFullpath();//这句需要放在super.onCreate上面

	super.onCreate(savedInstanceState);
}

public static ZipResourceFile obbzip = null;

public static void init(final Context pContext, final Cocos2dxHelperListener pCocos2dxHelperListener) {

	// begin--------------------添加代码----------------------------
	//检查obb文件是否存在
	if(fileIsExists(ultraman.FATE_OBB_PATH)){
		//存在添加obb路径到cocos中 注意 nativeSetObbPath 方法是需要新添加的 下方会介绍
		Cocos2dxHelper.nativeSetObbPath(ultraman.FATE_OBB_PATH);
	}
	// end--------------------添加代码----------------------------
	
	final ApplicationInfo applicationInfo = pContext.getApplicationInfo();
		
	Cocos2dxHelper.sContext = pContext;
	Cocos2dxHelper.sCocos2dxHelperListener = pCocos2dxHelperListener;

	Cocos2dxHelper.sPackageName = applicationInfo.packageName;
	Cocos2dxHelper.sFileDirectory = pContext.getFilesDir().getAbsolutePath();
	Cocos2dxHelper.nativeSetApkPath(applicationInfo.sourceDir);

	Cocos2dxHelper.sCocos2dxAccelerometer = new Cocos2dxAccelerometer(pContext);
	Cocos2dxHelper.sCocos2dMusic = new Cocos2dxMusic(pContext);
	int simultaneousStreams = Cocos2dxSound.MAX_SIMULTANEOUS_STREAMS_DEFAULT;
    if (Cocos2dxHelper.getDeviceModel().indexOf("GT-I9100") != -1) {
        simultaneousStreams = Cocos2dxSound.MAX_SIMULTANEOUS_STREAMS_I9100;
    }
    Cocos2dxHelper.sCocos2dSound = new Cocos2dxSound(pContext, simultaneousStreams);
	Cocos2dxHelper.sAssetManager = pContext.getAssets();

	//设置压缩包
	PackageInfo info = null;
	try {
		info = pContext.getPackageManager().getPackageInfo(pContext.getPackageName(), 0);
		Cocos2dxHelper.obbzip = APKExpansionSupport.getAPKExpansionZipFile(pContext,info.versionCode,0);
	} catch (PackageManager.NameNotFoundException e1) {
		e1.printStackTrace();
	} catch (IOException e1) {
		e1.printStackTrace();
	}
	// end--------------------添加代码----------------------------

	Cocos2dxBitmap.setContext(pContext);
	Cocos2dxETCLoader.setContext(pContext);
	
}

//检查obb文件是否存在
public static boolean fileIsExists(String strFile)
{
	try
	{
		File f=new File(strFile);
		if(!f.exists())
		{
			return false;
		}

	}
	catch (Exception e)
	{
		return false;
	}

	return true;
}

//nativeSetObbPath 设置obb路径方法
private static native void nativeSetObbPath(final String pObbPath);

//Cocos2dxMusic.java
private MediaPlayer createMediaplayer(final String pPath) {
	MediaPlayer mediaPlayer = new MediaPlayer();

	try {
		if (pPath.startsWith("/")) {
			final FileInputStream fis = new FileInputStream(pPath);
			mediaPlayer.setDataSource(fis.getFD());
			fis.close();
		} else {
		    //-------------------modify begin-----------------
			final AssetFileDescriptor assetFileDescritor =  Cocos2dxHelper.obbzip.getAssetFileDescriptor("assets/"+pPath);
			if(assetFileDescritor == null) {
				final AssetFileDescriptor assetFileDescritor1 = this.mContext.getAssets().openFd(pPath);
				mediaPlayer.setDataSource(assetFileDescritor1.getFileDescriptor(), assetFileDescritor1.getStartOffset(), assetFileDescritor1.getLength());
			}else{
				mediaPlayer.setDataSource(assetFileDescritor.getFileDescriptor(), assetFileDescritor.getStartOffset(), assetFileDescritor.getLength());
			}
			//-------------------modify end-----------------
		}

		mediaPlayer.prepare();

		mediaPlayer.setVolume(this.mLeftVolume, this.mRightVolume);
	} catch (final Exception e) {
		mediaPlayer = null;
		Log.e(Cocos2dxMusic.TAG, "error: " + e.getMessage(), e);
	}

	return mediaPlayer;
}
//Cocos2dxSound.java
public int createSoundIDFromAsset(final String pPath) {
	int soundID = Cocos2dxSound.INVALID_SOUND_ID;

	try {
		if (pPath.startsWith("/")) {
			soundID = this.mSoundPool.load(pPath, 0);
		} else {
    		//-------------------modify begin-----------------
			final AssetFileDescriptor assetFileDescritor =  Cocos2dxHelper.obbzip.getAssetFileDescriptor("assets/"+pPath);
			if(assetFileDescritor == null) {
				soundID = this.mSoundPool.load(this.mContext.getAssets().openFd(pPath), 0);
			}else{
				soundID = this.mSoundPool.load(assetFileDescritor, 0);
			}
			//-------------------modify end-----------------
		}
	} catch (final Exception e) {
		soundID = Cocos2dxSound.INVALID_SOUND_ID;
		Log.e(Cocos2dxSound.TAG, "error: " + e.getMessage(), e);
	}

	// mSoundPool.load returns 0 if something goes wrong, for example a file does not exist
	if (soundID == 0) {
		soundID = Cocos2dxSound.INVALID_SOUND_ID;
	}

	return soundID;
}