title: Autocompletion not showing in Android Studio with dual screens
body: <p>I just switched from Eclipse to Android Studio (IntelliJ).</p>
  
  <p>I can't figure out how the autocompletion works! I tried Control + Space, Control + Shift + Space but i have no relevant suggestion. Not in the Java files, not in the layout files.</p>
  
  <p>Is there another shortcut? Do I need to enable some option beforehand?</p>