private void copyFile(FileInfo fileInfo) {
   mFileOperationHelper.setOperationState(FileOperationHelper.FILE_OPERATION_STATE_COPY);
   mFileOperationHelper.addOperationInfo(fileInfo);
 }
 private void moveFile(FileInfo fileInfo) {
   mFileOperationHelper.setOperationState(FileOperationHelper.FILE_OPERATION_STATE_MOVE);
   mFileOperationHelper.addOperationInfo(fileInfo);
   // reflushData();
 }