android Glide 在fragment出现第一次加载模糊的问题

@Override
   public View getView(int position, View convertView, ViewGroup parent) {
       ImageView imageView = new ImageView(mContext);
       imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
       ImageLoaderHelper.getInstance().displayChatGroupImage(mContext, imageView, data.get(position), R.drawable.bg_chat_group_default, 5);
       return imageView;
   }

@Override
    public void displayChatGroupImage(Context context, ImageView imageView, String url, int defaultImageResId, int radius) {
        Glide.with(context)
                .load(getChatGroupGlideUrl(url))
                .transform(new CenterCrop(context), new RoundTransform(context, radius))
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .placeholder(defaultImageResId)
                .into(imageView);
    }

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView = new ImageView(mContext);
        ViewGroup.LayoutParams params = null;
        if (isNormalSize) {
            params = new ViewGroup.LayoutParams(normalSize, normalSize);
        } else {
            params = new ViewGroup.LayoutParams(bigSize, normalSize);
        }
        imageView.setLayoutParams(params);
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        ImageLoaderHelper.getInstance().displayChatGroupImage(mContext, imageView, data.get(position), R.drawable.bg_chat_group_default, 5);
        return imageView;
    }