BayernMessenger/vector/src/main/res/layout/item_group.xml

<?xml version="1.0" encoding="utf-8"?>

<im.vector.riotredesign.core.platform.CheckableFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/itemGroupLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent"
    android:clickable="true"
    android:focusable="true"
    android:padding="8dp">

    <ImageView
        android:id="@+id/groupAvatarImageView"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_gravity="center"
        android:duplicateParentState="true"
        android:foreground="@drawable/fg_group_item"
        tools:src="@tools:sample/avatars" />

</im.vector.riotredesign.core.platform.CheckableFrameLayout>