Android Menu: Two single-checkable groups in the same menu

Question

My xml code is:

Answer 1

Use:

compile 'com.android.support:appcompat-v7:23.1.0'
compile 'com.android.support:design:23.1.0'

Answer 2

You just need to add unique IDs to each of the group items in the xml file.

<group
    android:id="@+id/menuGroup_1"           <!-- Here -->
    android:checkableBehavior="single">
    <item android:id="@+id/group_1_box_1"/>
    <item android:id="@+id/group_1_box_2"/>
</group>

<group
    android:id="@+id/menuGroup_2"           <!-- And here -->
    android:checkableBehavior="single">
    <item android:id="@+id/group_2_box_1"/>
    <item android:id="@+id/group_2_box_2"/>
</group>