Android 工程打包资源文件-OBB文件设置

设备/引擎：Mac（11.6）/cocos

开发工具：Android studio(4.1.2)

开发语言：java

开发需求：对工程的资源文件进行打包处理

当上传到google的工程中的资源文件大于100m时，就不能直接将资源文件放在工程里，而需要将资源文件打包成OBB文件再进行上传。话不多说，具体步骤如下：

1.在工程的.java中添加以下代码：

public static String FATE_OBB_PATH= "";
public void onCreate(Bundle savedInstanceState) {//获取obb 路径FATE_OBB_PATH =getVirtualObbFileFullpath() ;//这句需要放在super.onCreate上面super.onCreate(savedInstanceState);...
}
//获取访问权限
private void requestPermission(){if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)){ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 0);}else {ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 0);}}
}@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);switch (requestCode){case 0:{if (grantResults.length >0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){Log.i(TAG,"onRequestPermissionsResult granted");}else {Log.i(TAG,"onRequestPermissionsResult denied");}}break;}
}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(){if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {File sdcardDir = Environment.getExternalStorageDirectory();String _path = getObbDir().getAbsolutePath() + "/" + getObbFileName();
//        String _path = sdcardDir+"/Android/obb/"+getPackageName()+"/"+ getObbFileName();Log.e("===_path===", _path);File f=new File(getObbDir().getAbsolutePath() + "/");
//          File f=new File(strFile);if(!f.exists())
//          if(!f.canRead()){boolean isMkdir = f.mkdir();if (isMkdir){return _path;}else {return null;}
//             return false;}return _path;}else {return null;}}

2.在Cocos2dxHelper.java中修改代码如下：

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(MainActivity.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(MainActivity.FATE_OBB_PATH);}// end--------------------添加代码----------------------------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;}private static native void nativeSetApkPath(final String pApkPath);//nativeSetObbPath 设置obb路径方法private static native void nativeSetObbPath(final String pObbPath);

3.在Cocos2dxMusic.java和Cocos2dxSound.java代码修改，用来查找obb包：

//Cocos2dxMusic.java
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());
}
//Cocos2dxSound.java
final AssetFileDescriptor assetFileDescritor =  Cocos2dxHelper.obbzip.getAssetFileDescriptor("assets/"+pPath);
if(assetFileDescritor == null) {final AssetFileDescriptor assetFileDescritor1 = this.mContext.getAssets().openFd(pPath);soundID = this.mSoundPool.load(assetFileDescritor1, 0);
}else{soundID = this.mSoundPool.load(assetFileDescritor, 0);}

4.修改Java_org_cocos2dx_lib_Cocos2dxHelper.cpp文件：

string g_apkPath;
//添加obb path
string g_obbPath;
//添加设置obbpath 方法
JNIEXPORT void JNICALL Java_org_cocos2dx_lib_Cocos2dxHelper_nativeSetObbPath(JNIEnv*  env, jobject thiz, jstring obbPath) {g_obbPath = JniHelper::jstring2string(obbPath);
}
//添加获取obbpath 方法
const char * getObbPath() {return g_obbPath.c_str();
}

5.修改CCFileUtilsAndroid.h：

//添加方法
extern const char * getObbPath();

6.在CCFileUtilsAndroid.cpp中修改：

static ZipFile *s_pZipFile = NULL;
//在 s_pZipFile 下添加一个 obb zip包解析
static ZipFile *s_pZipFileobb = NULL;//在sharedFileUtils() 中创建obb的zip
CCFileUtils* CCFileUtils::sharedFileUtils()
{if (s_sharedFileUtils == NULL){s_sharedFileUtils = new CCFileUtilsAndroid();s_sharedFileUtils->init();std::string resourcePath = getApkPath();s_pZipFile = new ZipFile(resourcePath, "assets/");// begin ------------------代码添加//获取obb路径std::string resourcePath_Obb = getObbPath();//  创建obbzips_pZipFileobb = new ZipFile(resourcePath_Obb,"assets/");// end --------------------代码添加}return s_sharedFileUtils;
}
CCFileUtilsAndroid::~CCFileUtilsAndroid()
{CC_SAFE_DELETE(s_pZipFile);//销毁CC_SAFE_DELETE(s_pZipFileobb);
}//文件检查中的修改
bool CCFileUtilsAndroid::isFileExist(const std::string& strFilePath)
{if (0 == strFilePath.length()){return false;}bool bFound = false;// Check whether file exists in apk.if (strFilePath[0] != '/'){std::string strPath = strFilePath;if (strPath.find(m_strDefaultResRootPath) != 0){// Didn't find "assets/" at the beginning of the path, adding it.strPath.insert(0, m_strDefaultResRootPath);}if (s_pZipFile->fileExists(strPath)){bFound = true;}// begin -------------代码添加if(!bFound){if (s_pZipFileobb->fileExists(strPath)){bFound = true;}}// end -----------------代码添加}else{FILE *fp = fopen(strFilePath.c_str(), "r");if(fp){bFound = true;fclose(fp);}}return bFound;
}//文件获取方法中的代码修改
unsigned char* CCFileUtilsAndroid::doGetFileData(const char* pszFileName, const char* pszMode, unsigned long * pSize, bool forAsync)
{unsigned char * pData = 0;if ((! pszFileName) || (! pszMode) || 0 == strlen(pszFileName)){return 0;}string fullPath = fullPathForFilename(pszFileName);if (fullPath[0] != '/'){if (forAsync){pData = s_pZipFile->getFileData(fullPath.c_str(), pSize, s_pZipFile->_dataThread);// begin -------------代码添加if (! pData){pData = s_pZipFileobb->getFileData(fullPath.c_str(), pSize, s_pZipFile->_dataThread);}//end -------------代码添加}else{pData = s_pZipFile->getFileData(fullPath.c_str(), pSize);// begin -------------代码添加if (! pData){pData = s_pZipFileobb->getFileData(fullPath.c_str(), pSize);}//end -------------代码添加}}else{do{// read rrom other path than user set it//CCLOG("GETTING FILE ABSOLUTE DATA: %s", pszFileName);FILE *fp = fopen(fullPath.c_str(), pszMode);CC_BREAK_IF(!fp);unsigned long size;fseek(fp,0,SEEK_END);size = ftell(fp);fseek(fp,0,SEEK_SET);pData = new unsigned char[size];size = fread(pData,sizeof(unsigned char), size,fp);fclose(fp);if (pSize){*pSize = size;}} while (0);}if (! pData){std::string msg = "Get data from file(";msg.append(pszFileName).append(") failed!");CCLOG("%s", msg.c_str());}return pData;
}

7.在Cocos2dxActivity中修改代码，目的是只有用户点击允许访问存储后才会进入游戏：
（1）：在onCreate()中的代码：

     super.onCreate(savedInstanceState);instance = this;this.mHandler = new Cocos2dxHandler(this);this.init();

修改为：

     super.onCreate(savedInstanceState);sContext = this;instance = this;this.mHandler = new Cocos2dxHandler(this);if (ContextCompat.checkSelfPermission(JoyPreschool.getContext(), Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){}else {this.init();Cocos2dxHelper.init(this, this);}

（2）：在onResume()、onPause()中的代码：

     super.onResume();Cocos2dxHelper.onResume();this.mGLSurfaceView.onResume();

     super.onPause();Cocos2dxHelper.onPause();this.mGLSurfaceView.onPause();

修改为：

     super.onResume();Cocos2dxHelper.onResume();if (this.mGLSurfaceView != null){this.mGLSurfaceView.onResume();}

     super.onPause();Cocos2dxHelper.onPause();if (this.mGLSurfaceView != null){this.mGLSurfaceView.onPause();}

8.在AndroidMenifest.xml中添加权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

9.用WinRAR将工程的资源文件-assets文件夹压缩，压缩方式为存储(Store)，压缩文件格式为zip；

10.将压缩后的文件重新命名，obb文件名为main.版本号.包名.obb，例如版本号为10，包名为com.jpt.game，文件名为main.10.com.jpt.game.obb;

至此有关打包OBB文件的设置全部完成。

希望能给大家带来帮助！！！有什么问题可以评论私信咨询了解~