public static File createTessDataFolder() {
   String folderParentName = "stpdata";
   String folderTessDataName = "tessdata";
   File storageDir = mContext.getFilesDir();
   Log.i("createTessDataFolder", storageDir.getAbsolutePath());
   // File folderTess = new File(mContext.getFilesDir() + "/" + folderName);
   File folderTessPar = new File(mContext.getFilesDir(), folderParentName);
   if (!folderTessPar.exists()) {
     folderTessPar.mkdirs();
   }
   File folderTess = new File(folderTessPar, folderTessDataName);
   if (!folderTess.exists()) {
     folderTess.mkdirs();
   }
   return folderTess;
 }