activity_main.xml

<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:id="@+id/root_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.MainActivity">

    <fragment
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
        android:name="androidx.navigation.fragment.NavHostFragment"
        app:defaultNavHost="true"
        app:navGraph="@navigation/home_nav_graph"/>

    <fragment
        android:id="@+id/mini_player"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="bottom"
        android:name="dev.forcetower.podcasts.ui.miniplayer.MiniPlayerFragment"
        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
        app:behavior_peekHeight="128dp"
        app:behavior_skipCollapsed="false"
        app:behavior_hideable="true"
        tools:layout="@layout/fragment_mini_player"/>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_nav"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu="@menu/home_bottom_menu"
        android:layout_gravity="bottom" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>