RetroMusicPlayer/app/src/main/res/layout-land/fragment_flat_player.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:background="?attr/colorSurface"
    android:clickable="true"
    android:focusable="true"
    android:orientation="vertical">

    <View
        android:id="@+id/colorGradientBackground"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <include layout="@layout/shadow_statusbar_toolbar" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <include layout="@layout/status_bar" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <code.name.monkey.retromusic.views.HeightFitSquareLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <androidx.fragment.app.FragmentContainerView
                    android:id="@+id/playerAlbumCoverFragment"
                    android:name="code.name.monkey.retromusic.fragments.player.PlayerAlbumCoverFragment"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    tools:layout="@layout/fragment_album_flat_cover" />
            </code.name.monkey.retromusic.views.HeightFitSquareLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

                <com.google.android.material.appbar.MaterialToolbar
                    android:id="@+id/playerToolbar"
                    style="@style/Toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="0"
                    app:navigationIcon="@drawable/ic_keyboard_arrow_down_black" />

                <androidx.fragment.app.FragmentContainerView
                    android:id="@+id/playbackControlsFragment"
                    android:name="code.name.monkey.retromusic.fragments.player.flat.FlatPlaybackControlsFragment"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_gravity="bottom"
                    android:layout_weight="1"
                    tools:layout="@layout/fragment_flat_player_playback_controls" />
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</FrameLayout>