ytdl-android/app/src/main/res/layout/activity_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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"
    tools:context="com.deniscerri.ytdlnis.ui.settings.SettingsActivity">

    <FrameLayout
        android:id="@+id/settings_frame_layout"
        android:layout_width="match_parent"
        app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <com.google.android.material.appbar.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:liftOnScroll="false"
    android:background="@android:color/transparent"
    android:fitsSystemWindows="true">

        <com.google.android.material.appbar.MaterialToolbar
            android:id="@+id/settings_toolbar"
            android:elevation="0dp"
            app:layout_scrollFlags="scroll|enterAlways|snap"
            app:title="@string/settings"
            android:layout_width="match_parent"
            app:navigationIcon="@drawable/ic_back"
            android:layout_height="match_parent"/>


    </com.google.android.material.appbar.AppBarLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>