title: Android - How to implement Google Newsstand like layout?
body: <p>I'm trying to clone the “view article" fragment layout of Google Newsstand app. It has an <code>ImageView</code> on the top that shrinks to become a <code>Toolbar</code> when we scroll downwards, just below the <code>ImageView</code> lies a <code>TextView</code> that contains the text content of the article. While creating the layout itself is pretty easy, implementing the special kind of scroll effect that shrinks the <code>ImageView</code> into a <code>Toolbar</code> is pretty tricky. Since, most of the updated Google Apps containing material design(e.g. - Play Store, Google+, etc.) contains similar kind of layouts, I was wondering if there's any widget/custom library available for the same. If so, what is it called and how to implement it? </p>
  
  <p>Here's what the layout looks like:</p>
  
  <p><img src="https://i.stack.imgur.com/MALjs.jpg" alt="layout"></p>