title: GridLayout renders on Android 6, but doesn't on other versions (5.x)
body: <p><a href="http://pastebin.com/6U0T3H3u" rel="nofollow">layout.xml</a>
  <a href="http://pastebin.com/b14eQckw" rel="nofollow">styles.sml</a></p>
  
  <p>This layout renders correctly on emulators running Android 6, but on other versions nothing is displayed. What am I doing wrong?</p>