BarInsta/app/src/main/res/layout/layout_directory_chooser.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appBarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toTopOf="@id/directoryList"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.appbar.MaterialToolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:navigationIcon="@drawable/ic_arrow_upward_24"
            tools:title="/this/that/thy" />
    </com.google.android.material.appbar.AppBarLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/directoryList"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/bottom_horizontal_divider"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/appBarLayout" />

    <include
        android:id="@+id/bottom_horizontal_divider"
        layout="@layout/item_pref_divider"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        app:layout_constraintBottom_toTopOf="@id/btnCancel"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/directoryList" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/btnCancel"
        style="@style/Widget.MaterialComponents.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/cancel"
        app:icon="@drawable/ic_close_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/directoryList" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/btnConfirm"
        style="@style/Widget.MaterialComponents.Button.TextButton"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/confirm"
        app:icon="@drawable/ic_check_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/directoryList" />
</androidx.constraintlayout.widget.ConstraintLayout>