PlayerAndroid/app/src/main/res/layout/fragment_folder.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical">

    <FrameLayout
        android:id="@+id/coordinator_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1">

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

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

            <com.google.android.material.appbar.AppBarLayout
                android:id="@+id/app_bar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:elevation="0dp"
                app:elevation="0dp">

                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_collapseMode="pin">

                    <androidx.appcompat.widget.Toolbar
                        android:id="@+id/toolbar"
                        style="@style/Toolbar48"
                        tools:ignore="UnusedAttribute">

                        <TextView
                            android:id="@+id/title"
                            style="@style/BigTitleTextAppearance"
                            android:text="@string/folders"
                            tools:ignore="MissingPrefix" />

                    </androidx.appcompat.widget.Toolbar>

                    <ViewStub
                        android:id="@+id/cab_stub"
                        android:layout_width="match_parent"
                        android:layout_height="48dp" />
                </FrameLayout>
            </com.google.android.material.appbar.AppBarLayout>


            <FrameLayout
                android:id="@+id/container"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@color/md_white_1000"
                android:elevation="@dimen/card_elevation">

                <com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView
                    android:id="@+id/recycler_view"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:clipToPadding="false"
                    android:layoutAnimation="@anim/layout_animation_fall_down"
                    android:scrollbars="none" />

                <TextView
                    android:id="@android:id/empty"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:text="@string/empty"
                    android:textColor="?android:textColorSecondary"
                    android:textSize="@dimen/empty_text_size" />

            </FrameLayout>
        </LinearLayout>
    </FrameLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="?dividerColor" />

    <code.name.monkey.retromusic.views.BreadCrumbLayout
        android:id="@+id/bread_crumbs"
        android:layout_width="match_parent"
        android:layout_height="@dimen/tab_height"
        android:layout_weight="0"
        android:elevation="6dp"
        android:paddingStart="60dp"
        android:paddingEnd="8dp" />
</LinearLayout>