RetroMusicPlayer/app/src/main/res/layout/sliding_music_panel_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:sothree="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:orientation="vertical">

    <com.sothree.slidinguppanel.SlidingUpPanelLayout xmlns:sothree="http://schemas.android.com/apk/res-auto"
        android:id="@+id/sliding_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="bottom"
        sothree:umanoOverlay="false"
        sothree:umanoPanelHeight="0dp"
        sothree:umanoScrollableView="@+id/recycler_view"
        sothree:umanoShadowHeight="0dp">


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


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


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

            <fragment
                android:id="@+id/mini_player_fragment"
                android:name="code.name.monkey.retromusic.ui.fragments.MiniPlayerFragment"
                android:layout_width="match_parent"
                android:layout_height="48dp"
                tools:layout="@layout/fragment_mini_player" />
        </FrameLayout>
    </com.sothree.slidinguppanel.SlidingUpPanelLayout>


    <fragment
        android:id="@+id/castMiniController"
        class="com.google.android.gms.cast.framework.media.widget.MiniControllerFragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        tools:visibility="visible" />

</LinearLayout>