res/layout/add_item_confirmation_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2017, 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.
*/
-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:clipToPadding="false">

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

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:paddingBottom="20dp"
                android:paddingLeft="24dp"
                android:paddingRight="24dp"
                android:paddingTop="4dp"
                android:text="@string/add_item_request_drag_hint" />

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="?android:attr/colorPrimaryDark"
                android:theme="@style/WidgetContainerTheme">

                <com.android.launcher3.dragndrop.LivePreviewWidgetCell
                    android:id="@+id/widget_cell"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_weight="1"
                    android:background="?android:attr/colorPrimaryDark"
                    android:focusable="true"
                    android:gravity="center_horizontal"
                    android:orientation="vertical" >

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

                </com.android.launcher3.dragndrop.LivePreviewWidgetCell>
            </FrameLayout>
        </LinearLayout>
    </ScrollView>

    <LinearLayout
        style="?android:attr/buttonBarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="end"
        android:paddingBottom="4dp"
        android:paddingEnd="12dp"
        android:paddingStart="12dp"
        android:paddingTop="4dp" >
        <Button
            style="?android:attr/buttonBarButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onCancelClick"
            android:text="@android:string/cancel" />
        <Button
            style="?android:attr/buttonBarButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onPlaceAutomaticallyClick"
            android:text="@string/place_automatically" />
    </LinearLayout>
</LinearLayout>