我想成立一​​个的TextView 与 SpannableString 这是从下面的方法：

I want to set a TextView with SpannableString which is from the method below:

Html.fromHtml(String source, Html.ImageGetter imageGetter, 
   Html.TagHandler tagHandler)

但 ImageGetter 这里需要覆盖下面的方法：

But the ImageGetter here need to override the method below:

public abstract Drawable getDrawable(String source)

由于我需要从互联网上获得的绘制，我也要异步做到这一点，看来事实并非如此。

Because I need to get the drawable from the internet, I have to do it asynchronously and seems it is not.

如何使它工作？ 谢谢你。

How to make it work? Thanks.

推荐答案

现在我使用的AsyncTask下载图像的 ImageGetter ：

Now I'm using an AsyncTask to download the images in the ImageGetter:

Spanned spannedContent = Html.fromHtml(htmlString, new ImageGetter() {

        @Override
        public Drawable getDrawable(String source) {
            new ImageDownloadAsyncTask().execute(textView, htmlString, source);
            return null;
        }
    }, null);

和重新设置文成的TextView 图像已被下载的时候。

And set the text again into the TextView when the image has been downloaded.

现在它的作品。但是失败了，当我试图做 TextView.postInvalidate（）重绘下载的图像。我必须在的setText（）再这样做了的AsyncTask 。

Now it works. But It failed when I tried to do the TextView.postInvalidate() to redraw the downloaded images. I have to do setText() again in the AsyncTask.

有谁知道为什么吗？