res/layout/fragment_image_preview_v2.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
     Copyright (C) 2020 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.
-->

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="?android:colorPrimary">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="@dimen/bottom_navbar_height"
        android:orientation="vertical">

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

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:orientation="vertical">

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

                <ImageView
                    android:id="@+id/low_res_image"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:scaleType="centerCrop"
                    android:background="@android:color/black" />

                <com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
                    android:id="@+id/full_res_image"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" />

                <androidx.core.widget.ContentLoadingProgressBar
                    android:id="@+id/loading_indicator"
                    style="@android:style/Widget.DeviceDefault.ProgressBar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:indeterminate="true"/>
            </FrameLayout>

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

                <androidx.constraintlayout.widget.ConstraintLayout
                    android:id="@+id/container"
                    android:layout_width="match_parent"
                    android:layout_height="0dp"
                    android:layout_weight="1"
                    android:paddingTop="@dimen/full_preview_page_default_padding_top"
                    android:background="@color/fullscreen_preview_background">

                    <com.android.wallpaper.picker.TouchForwardingLayout
                        android:id="@+id/touch_forwarding_layout"
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        app:layout_constraintLeft_toLeftOf="parent"
                        app:layout_constraintRight_toRightOf="parent"
                        app:layout_constraintTop_toTopOf="parent"
                        app:layout_constraintBottom_toBottomOf="parent">

                        <androidx.cardview.widget.CardView
                            android:layout_width="match_parent"
                            android:layout_height="match_parent">

                            <SurfaceView
                                android:id="@+id/wallpaper_surface"
                                android:layout_width="match_parent"
                                android:layout_height="match_parent" />

                            <SurfaceView
                                android:id="@+id/workspace_surface"
                                android:layout_width="match_parent"
                                android:layout_height="match_parent" />

                            <include layout="@layout/lock_screen_overlay" android:visibility="gone" />
                        </androidx.cardview.widget.CardView>
                    </com.android.wallpaper.picker.TouchForwardingLayout>
                </androidx.constraintlayout.widget.ConstraintLayout>

                <LinearLayout
                    android:id="@+id/tabs_container"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/fullscreen_preview_background"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/lock"
                        android:layout_width="wrap_content"
                        android:layout_height="64dp"
                        android:layout_weight="1"
                        android:background="?android:attr/selectableItemBackgroundBorderless"
                        android:paddingTop="20dp"
                        android:paddingBottom="20dp"
                        android:gravity="center"
                        android:text="@string/lock_screen_message" />

                    <TextView
                        android:id="@+id/home"
                        android:layout_width="wrap_content"
                        android:layout_height="64dp"
                        android:layout_weight="1"
                        android:background="?android:attr/selectableItemBackgroundBorderless"
                        android:paddingTop="20dp"
                        android:paddingBottom="20dp"
                        android:gravity="center"
                        android:text="@string/home_screen_message" />
                </LinearLayout>
            </LinearLayout>
        </FrameLayout>


        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="gone">

            <androidx.coordinatorlayout.widget.CoordinatorLayout
                android:id="@+id/coordinator_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom">

                <FrameLayout
                    android:id="@+id/bottom_sheet"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@drawable/preview_bottom_sheet_background"
                    android:theme="@style/WallpaperPicker.BottomPaneStyle"
                    app:behavior_peekHeight="@dimen/preview_attribution_pane_collapsed_height"
                    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
                    <include
                        layout="@layout/preview_page_info"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"/>
                </FrameLayout>

            </androidx.coordinatorlayout.widget.CoordinatorLayout>

        </FrameLayout>
    </LinearLayout>

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

</FrameLayout>