@Override protected Void doInBackground(String... params) { mFileSize.clear(); mFileTime.clear(); ArrayList<String> fileList = (ArrayList<String>) FileUtils.getVideoFileName(); for (String str : fileList) { mFileSize.add(FileUtils.getFileSize(str)); mFileTime.add(FileUtils.getVideoTime(getContentResolver(), getResources(), str)); } mFileList = fileList; return null; }