android - Android SmartImageView 图像未加载

Question

我在布局中使用SmartImageView并将 URL 设置如下

header.setImageUrl(welcomeScreen._headerImageUri, new SmartImageTask.OnCompleteListener() {
    @Override
    public void onComplete() {
        int height = 0;
        if (header.getDrawable() != null) {
            height = (int) Math.round(((double) header.getWidth()) * ((double) header.getDrawable().getIntrinsicHeight()) / ((double) header.getDrawable().getIntrinsicWidth()));
        }

        header.setLayoutParams(new RelativeLayout.LayoutParams(header.getWidth(), height + 1));
    }
});

布局参数已设置，我的标题占据了空间。但是图像没有显示。我不明白我做错了什么