@Override
    protected String doInBackground(Bitmap... params) {
      String fileName = null;
      try {
        bitmap = params[0];

        String picName = TimeUtils.dtFormat(new Date(), "yyyyMMddHHmmss");
        fileName =
            ImageUtils.saveToFile(
                FileUtils.getInst().getPhotoSavedPath() + "/" + picName, false, bitmap);

      } catch (Exception e) {
        e.printStackTrace();
        toast("图片处理错误,请退出相机并重试", Toast.LENGTH_LONG);
      }
      return fileName;
    }