title: Android Checkable Menu Item
body: <p>I have the following menu layout in my Android app:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item android:id="@+id/item1" 
            android:titleCondensed="Options"
            android:title="Highlight Options" 
            android:icon="@android:drawable/ic_menu_preferences" /&gt;
  
     &lt;item android:id="@+id/item2" 
           android:titleCondensed="Persist"
           android:title="Persist" 
           android:icon="@android:drawable/ic_menu_preferences" 
           android:checkable="true" /&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>My problem is that the second menu item doesn't appear to be "checkable" when I run my app in the Android emulator. There should be a green tick about the item, right? To indicate that its checkable. </p>
  
  <p>Am I doing something wrong? </p>