title: CollapsingToolbarLayout contentScrim is ignored?
body: <p>I'm using CollapsingToolbarLayout to show the cover image for an article when it's not collapsed, to do this I use setBackground in my Activity. It used to show the image only when not collapsed and then turn my app primary color after i scrolled a bit but now it just keep showing the image as the toolbar background. Here's my layout(which is basically just the android scrolling activity example layout): <a href="https://gist.github.com/anonymous/7c68a84e40568d276fd329370e5224fa" rel="nofollow">https://gist.github.com/anonymous/7c68a84e40568d276fd329370e5224fa</a><br>
  In my code I just call:  </p>
  
  <pre><code>findViewById(R.id.viewarticle_appbarlayout).setBackground(image);
  </code></pre>