Having two single-selection groups in ActionBar doesn't work, but attaching a pop up menu instead doesn't work either

Question

I am writing an Android app where the user must choose how and what to display on a graph. These options are expressed in two single-selection menu groups (radio but

Answer 1

I found an elegant way to solve this that was unfortunately not in the documentation. Add the following code to your ActionBar menu XML:

<item android:id="@+id/menu_openothermenu"
      android:title="@string/openothermenustr"
      android:showAsAction="always">
    <menu>
        <group android:checkableBehavior="single">
            <item android:id="@+id/menu_2_choice_1" android:title="@string/2_choice_1"  android:showAsAction="never" />
            <item android:id="@+id/menu_2_choice_2" android:title="@string/2_choice_2"  android:showAsAction="never" android:checked="true" />
        </group>
     </menu>
</item>

No extra handler code or popup menu implementation is necessary for such a menu to appear.