skyline/app/src/main/res/layout/emu_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:keepScreenOn="true"
    android:background="@android:color/black"
    tools:context=".EmulationActivity">

    <emu.skyline.views.FixedRatioSurfaceView
        android:id="@+id/game_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center" />

    <emu.skyline.input.onscreen.OnScreenControllerView
        android:id="@+id/on_screen_controller_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <TextView
        android:id="@+id/perf_stats"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:textColor="#9fffff00" />

    <ImageButton
        android:id="@+id/on_screen_controller_toggle"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_gravity="bottom|end"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:src="@drawable/ic_show"
        app:tint="#40FFFFFF"
        tools:ignore="ContentDescription" />
</FrameLayout>