packages/SystemUI/res/layout/long_screenshot.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2021 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"
    xmlns:tools="http://schemas.android.com/tools"
    android:background="?android:colorBackgroundFloating"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/save"
        app:layout_constraintEnd_toStartOf="@id/cancel"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/guideline" />

    <Button
        android:id="@+id/cancel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/cancel"
        app:layout_constraintEnd_toStartOf="@id/edit"
        app:layout_constraintStart_toEndOf="@id/save"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/guideline" />

    <Button
        android:id="@+id/edit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/screenshot_edit_label"
        app:layout_constraintEnd_toStartOf="@id/share"
        app:layout_constraintStart_toEndOf="@id/cancel"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/guideline" />

    <Button
        android:id="@+id/share"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@*android:string/share"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/edit"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/guideline" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.1" />

    <ImageView
        android:id="@+id/preview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="42dp"
        android:layout_marginHorizontal="48dp"
        app:layout_constrainedHeight="true"
        app:layout_constrainedWidth="true"
        app:layout_constraintTop_toBottomOf="@id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        tools:background="?android:colorBackground"
        tools:minHeight="100dp"
        tools:minWidth="100dp" />

    <com.android.systemui.screenshot.CropView
        android:id="@+id/crop_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="42dp"
        app:layout_constrainedHeight="true"
        app:layout_constrainedWidth="true"
        app:layout_constraintTop_toBottomOf="@id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:handleThickness="@dimen/screenshot_crop_handle_thickness"
        app:handleColor="@*android:color/accent_device_default"
        app:scrimColor="@color/screenshot_crop_scrim"
        tools:background="?android:colorBackground"
        tools:minHeight="100dp"
        tools:minWidth="100dp" />

    <com.android.systemui.screenshot.MagnifierView
        android:id="@+id/magnifier"
        android:visibility="invisible"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:elevation="2dp"
        app:layout_constraintTop_toBottomOf="@id/guideline"
        app:layout_constraintLeft_toLeftOf="parent"
        app:handleThickness="@dimen/screenshot_crop_handle_thickness"
        app:handleColor="@*android:color/accent_device_default"
        app:scrimColor="@color/screenshot_crop_scrim"
        app:borderThickness="4dp"
        app:borderColor="#fff"
        />

</androidx.constraintlayout.widget.ConstraintLayout>