title: Animated loading image in picasso
body: <p>I have the following code to load an image in Picasso, using a drawable for the placeholder to display while the image is downloading. What I want though is an animated spinning progress bar style spinner that animates around and around while the image is loading, like I see in most professional apps. Picasso doesn't seem to support this, only static image drawables. Is there a way to get it working with Picasso or do I have to do something different?</p>
  
  <pre><code>Picasso.with(context).load(url)             
                      .placeholder(R.drawable.loading)
                      .error(R.drawable.image_download_error)
                      .into(view);
  </code></pre>