private void saveVoucherList(byte[] buffer) {
    try {
      String fname = ((User) getApplication()).loaduserIdFromPreferences();
      String getVoucherResultString = FileUtils.convertByteArrayToString(buffer);

      boolean isGetVoucherSuccess = isgetVoucherSuccess(getVoucherResultString);

      if (buffer != null && isGetVoucherSuccess) {
        VoucherListUtils.writeInternalStoragePrivate(this, fname, buffer);
        VoucherListUtils.writeToExternalStoragePrivate(this, fname, buffer);
      } else {
      }
    } catch (Exception e) {
    }
  }
 public void clearUserData() {
   clearCookie();
   ((User) getApplication()).setvoucherCount(0);
   ((User) getApplication()).saveVoucherCountToPreferences();
   String fname = ((User) getApplication()).getuserId();
   if (fname != null) {
     VoucherListUtils.deleteInternalStoragePrivate(this, fname);
   }
   FileUtils.deleteExternalStorageAll(this, "");
 }