@Override
 public void updateUIAfterTask() {
   if (mRequestResult == null || !mRequestResult.equals("success")) {
     ToastUtils.showShortToast(this, "上传失败");
   } else {
     ToastUtils.showShortToast(this, "上传成功");
   }
 }
 @Override
 public void didTaskTimerOver() {
   logD("task time over...");
   ToastUtils.showShortToast(this, "上传超时");
 }