title: Support different layouts sizes
body: <p>I'm trying to create the following folders for the different device screen sizes , the thing it's I create the folders layout-sw320dp and layout-sw480dp to try the small screens and mediums but when I try to select a medium screen under sw480 I can't select any, just the big ones like 7", I'll send you the screen shot so you can see:</p>
  
  <pre><code> activity_actividad_login.xml(sw320dp)
     activity_actividad_login.xml(sw480dp)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/sPkzO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sPkzO.png" alt="enter image description here"></a></p>