title: Use a thumbnail as a placeholder for Picasso
body: <p>From the UX point of view, it will be great to show the user a thumbnail first until the real image completes loading, then showing it to him, but <a href="https://github.com/square/picasso" rel="noreferrer">Picasso</a> uses only a resource file as the place holder like:</p>
  
  <pre><code>Picasso.with(context)
      .load(url)
      .placeholder(R.drawable.user_placeholder)
      .into(imageView);
  </code></pre>
  
  <p>So, how can I use a thumbnail URL as the placeholder? , and if I should use Picasso twice, then how?</p>
  
  <p><a href="https://github.com/square/picasso/issues/383" rel="noreferrer">An issue</a> is already opened on Picasso's github page with this request, but seems it won't be added to Picasso as per JakeWharton. So how could we do it with what's available in hand?</p>