title: How to get finish callback on setImageUrl with Volley library and NetworkImageView?
body: <p>I'm trying out the Google's new Volley library and it's looking sharp and loads images quickly when I use this method <code>setImageUrl</code>:</p>
  
  <pre><code>holder.image.setImageUrl(url, ImageCacheManager.getInstance().getImageLoader());
  </code></pre>
  
  <p>I want to add to it a call back/listener method that will fire up when loading is finished, so I can remove the <code>progressBar</code> view and show the image. It's an option that exists in Universal Image Loader and Picasso libraries, but
  for some reason, I can't find a way to do that in Volley, tried to Google different options but so far haven't found any reference.</p>
  
  <p>Does someone have a code sample to illustrate how it's done?</p>