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

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Copyright (c) 2019 Hemanth Savarala.
  ~
  ~ Licensed under the GNU General Public License v3
  ~
  ~ This is free software: you can redistribute it and/or modify it under
  ~ the terms of the GNU General Public License as published by
  ~  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
  ~
  ~ This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  ~ without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  ~ See the GNU General Public License for more details.
  -->

<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:background="?attr/colorSurface"
    android:orientation="vertical">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:elevation="0dp"
        tools:ignore="UnusedAttribute">

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

    </FrameLayout>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/appBarLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/transparent"
            android:elevation="0dp"
            app:elevation="0dp"
            app:liftOnScroll="true">

            <com.google.android.material.card.MaterialCardView
                android:id="@+id/toolbarContainer"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/toolbar_margin_horizontal"
                android:layout_marginTop="@dimen/toolbar_margin_vertical"
                android:layout_marginEnd="@dimen/toolbar_margin_horizontal"
                android:layout_marginBottom="@dimen/toolbar_margin_vertical"
                app:cardCornerRadius="8dp"
                app:cardUseCompatPadding="true"
                app:layout_scrollFlags="scroll|enterAlways">

                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <com.google.android.material.appbar.MaterialToolbar
                        android:id="@+id/toolbar"
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/toolbar_height"
                        android:background="?colorSurface"
                        app:contentInsetStart="0dp"
                        app:contentInsetStartWithNavigation="0dp"
                        app:popupTheme="?attr/toolbarPopupTheme"
                        app:title="@string/search_hint"
                        app:titleMarginStart="0dp"
                        app:titleTextAppearance="@style/ToolbarTextAppearanceSearch"
                        app:titleTextColor="?android:attr/textColorSecondary"
                        tools:ignore="UnusedAttribute" />

                    <ViewStub
                        android:id="@+id/cab_stub"
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/toolbar_height" />
                </FrameLayout>
            </com.google.android.material.card.MaterialCardView>
        </com.google.android.material.appbar.AppBarLayout>

        <FrameLayout
            android:id="@+id/fragmentContainer"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />

    </androidx.coordinatorlayout.widget.CoordinatorLayout>
</LinearLayout>