title: Android: Import DrawerLayout cannot be resolved
body: <p>I'm trying to import the classes required to use the new "Navigation Drawer" from Android
  <a href="http://developer.android.com/design/patterns/navigation-drawer.html#ImpactOnNav">http://developer.android.com/design/patterns/navigation-drawer.html#ImpactOnNav</a></p>
  
  <p>DrawerLayout:
  <a href="http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html">http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html</a></p>
  
  <p>ActionBarDrawerToggle:
  <a href="http://developer.android.com/reference/android/support/v4/app/ActionBarDrawerToggle.html">http://developer.android.com/reference/android/support/v4/app/ActionBarDrawerToggle.html</a></p>
  
  <p>The import android.support.v4.widget.DrawerLayout cannot be resolved
  The import android.support.v4.app.ActionBarDrawerToggle cannot be resolved</p>
  
  <p>I have updated the libraries to the latest version but still these classes are not recognized.</p>