raw拷贝dex到data...data

/**
   * 解压原始的dex文件
   *
   * @param context
   * @return
   * @throws IOException
   */
  private String unzipRAWFile(Context context) {

    String apkFilePath;
    Resources resources = context.getResources();
    InputStream inputStream = resources.openRawResource(R.raw.user);

    File externalCacheDir = context.getExternalCacheDir();

    File file = new File(externalCacheDir, resources.getResourceEntryName(R.raw.user) + ".dex");

    apkFilePath = file.getAbsolutePath();
    if (!file.exists()) {
      BufferedOutputStream bufferedOutputStream = null;
      FileOutputStream fileOutputStream = null;

      try {
        fileOutputStream = new FileOutputStream(file);
        bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
      } catch (FileNotFoundException e) {
        e.printStackTrace();
      }

      byte[] buffer = new byte[4 * 1024];
      int size;
      try {
        while ((size = inputStream.read(buffer)) != -1) {
          bufferedOutputStream.write(buffer, 0, size);
          bufferedOutputStream.flush();
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
      try {
        if (inputStream != null)
          inputStream.close();
        if (bufferedOutputStream != null)
          bufferedOutputStream.close();
        if (fileOutputStream != null)
          fileOutputStream.close();
      } catch (IOException e) {
        e.printStackTrace();
      }

      Log.i("@@@", "文件解压完毕，路径地址为：" + apkFilePath);
    } else {
      Log.i("@@@", "文件已存在，无需解压");
    }

    return apkFilePath;
  }