res/layout/fragment_small_preview_handheld.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2023 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
  -->
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fitsSystemWindows="true">

    <include
        android:id="@+id/toolbar_container"
        layout="@layout/section_header_content"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <Button
        android:id="@+id/button_set_wallpaper"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="@dimen/wallpaper_preview_buttons_elevation"
        android:layout_marginEnd="@dimen/set_wallpaper_button_margin_end"
        android:background="@drawable/set_wallpaper_button_background"
        android:text="@string/set_wallpaper_button_text"
        android:textColor="@color/text_color_on_accent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/toolbar_container"
        app:layout_constraintBottom_toBottomOf="@id/toolbar_container"/>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/pager_previews"
        android:layout_width="match_parent"
        android:layout_height="580dp"
        app:layout_constraintTop_toBottomOf="@id/toolbar_container"
        app:layout_constraintBottom_toTopOf="@id/pager_tabs"/>

    <com.android.wallpaper.widget.ConstraintViewPager
        android:id="@+id/pager_tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/pager_previews"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>