public int onReflush() {
   mData.clear();
   ArrayList<FileInfo> fileInfos = mFileOperationHelper.searchFileInfos(mKeywords);
   mData.addAll(fileInfos);
   Collections.sort(mData, mFileSortHelper.getComparator(mFileSettingsHelper.getSortType()));
   mAdapter.notifyDataSetChanged();
   if (fileInfos.size() <= 0) return ERROR_NO_FIND_FILES;
   return SEARCH_SUCCESS;
 }