drawer.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <group
        android:id="@+id/group1"
        android:checkableBehavior="single"
        android:visible="true">

        <item
            android:id="@+id/item_home"
            android:icon="@drawable/ic_home"
            android:title="Home" />

    </group>

    <group
        android:id="@+id/group2"
        android:checkableBehavior="single"
        android:visible="true">

        <item
            android:id="@+id/item_contact_list"
            android:icon="@drawable/ic_contact"
            android:title="Contact List" />

    </group>

</menu>