FossifyGallery/app/src/main/res/layout/fragment_holder.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/fragment_holder"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/fragment_placeholder"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ImageView
        android:id="@+id/top_shadow"
        android:layout_width="match_parent"
        android:layout_height="@dimen/default_status_action_height"
        android:background="@drawable/gradient_background_flipped"
        android:contentDescription="@null" />

    <include
        android:id="@+id/bottom_actions"
        layout="@layout/bottom_actions"
        android:visibility="gone" />

</RelativeLayout>