talk/examples/android/res/layout/activity_fullscreen.xml

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

<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    <android.opengl.GLSurfaceView
            android:id="@+id/glview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    <TextView
        android:id="@+id/room_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_above="@+id/menubar_fragment"
        android:textSize="24sp"
        android:layout_margin="8dp"/>
    <fragment
        android:name="org.appspot.apprtc.AppRTCDemoActivity$MenuBarFragment"
        android:id="@+id/menubar_fragment"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="32dp"
        tools:layout="@layout/fragment_menubar"/>

</RelativeLayout>