Android obb解压

最新推荐文章于 2025-04-30 10:00:00 发布

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本文介绍了一个用于处理Android平台上的OBB文件的方法，包括获取OBB文件路径、创建必要的目录、解压OBB文件到指定路径，以及一个专门针对OBB文件的解压流程，确保了游戏资源的正确安装与更新。

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   // obb
   public static String getObbFilePath(Context context) {
       try {
           Log.d("bbt", "getObbFilePath : packetName=" + context.getPackageName());
           Log.d("bbt", "getObbFilePath : absolutePath=" + Environment.getExternalStorageDirectory().getAbsolutePath());
           Log.d("bbt", "getObbFilePath : versionCode=" + context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode);
           return Environment.getExternalStorageDirectory().getAbsolutePath()
                   + "/Android/obb/"
                   + context.getPackageName()
                   + File.separator
                   + "main."
                   + context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode
                   + "."
                   + context.getPackageName()
                   + ".obb";
       } catch (Exception e) {
           e.printStackTrace();
           return null;
       }
   }

   public static void createDirectoryIfNeeded(String folderPath) {
       File folder = new File(folderPath);
       if (!folder.exists() || !folder.isDirectory()) {
           folder.mkdirs();
       }
   }

   public static void unZip(File zipFile, String outPathString) {
       Log.d("bbt", "unZip " + zipFile.getName() + " to " + outPathString);
       try {
           createDirectoryIfNeeded(outPathString);
           ZipInputStream inZip = new ZipInputStream(new FileInputStream(zipFile));
           ZipEntry zipEntry;
           String szName;
           while ((zipEntry = inZip.getNextEntry()) != null) {
               szName = zipEntry.getName();
               if (zipEntry.isDirectory()) {
                   szName = szName.substring(0, szName.length() - 1);
                   File folder = new File(outPathString + File.separator + szName);
                   folder.mkdirs();
               } else {
                   File file = new File(outPathString + File.separator + szName);
                   createDirectoryIfNeeded(file.getParent());
                   file.createNewFile();
                   FileOutputStream out = new FileOutputStream(file);
                   int len;
                   byte[] buffer = new byte[1024];
                   while ((len = inZip.read(buffer)) != -1) {
                       out.write(buffer, 0, len);
                       out.flush();
                   }
                   out.close();
               }
           }
           inZip.close();
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

   public static void unZipObb(String srcFilePath, String dstFolderPath) {
       Log.d("bbt", "unZipObb : srcFilePath=" + srcFilePath + ", dstFolderPath="+dstFolderPath);
       Context context = m_pActivity;
       if (context == null) {
           Log.d("bbt", "unZipObb error : context == null");
           return;
       }

       try {
           String obbFilePath = srcFilePath;
           if (obbFilePath.equals("")) {
               obbFilePath = getObbFilePath(context);
           }
           if (obbFilePath == null) {
               Log.d("bbt", "unZipObb error : obbFilePath == null");
               return;
           } else {
               File obbFile = new File(obbFilePath);
               if (!obbFile.exists()) {
                   //下载obb文件
                   Log.d("bbt", "unZipObb error : !obbFile.exists()");
               } else {
                   File outputFolder = new File(dstFolderPath);
                   if (!outputFolder.exists()) {
                       //目录未创建没有解压过
                       outputFolder.mkdirs();
                       unZip(obbFile, outputFolder.getAbsolutePath());
                   } else {
                       //目录已创建判断是否解压过
                       if (outputFolder.listFiles() == null) {
                           //解压过的文件被删除
                           unZip(obbFile, outputFolder.getAbsolutePath());
                       } else {
                           //此处可添加文件对比逻辑
                           Log.d("bbt", "unZipObb error : outputFolder.listFiles() != null");
                       }
                   }
               }
           }
       } catch (Exception e) {
           Log.d("bbt", "unZipObb error : Exception");
           e.printStackTrace();
       }