title: Display images on Android using TextView and Html.ImageGetter asynchronously?
body: <p>I want to set a <code>TextView</code> with <code>SpannableString</code> which is from the method below:</p>
  
  <pre><code>Html.fromHtml(String source, Html.ImageGetter imageGetter, 
     Html.TagHandler tagHandler)
  </code></pre>
  
  <p>But the <code>ImageGetter</code> here need to override the method below:</p>
  
  <pre><code>public abstract Drawable getDrawable(String source)
  </code></pre>
  
  <p>Because I need to get the drawable from the internet, I have to do it asynchronously and seems it is not.</p>
  
  <p>How to make it work?
  Thanks.</p>