title: The styles.xml file is not generated in my android project
body: <p>Recently I updated my eclipse Juno to Luna, but now the new project don't generate the android.R file. This probably caused by this AndroidManifest.xml error:</p>
  
  <pre><code>Error: No resource found that matches the given name (at 'theme' with value '@styles/AppTheme').
  </code></pre>
  
  <p>When I check the values folder, there is no styles.xml. 
  This only happens with the new projects, the existing projects (which I created in Juno) work fine.
  I've tried updating everything in SDK manager, but I still get the error.</p>