prebuilts/gradle/AutofillFramework/kotlinApp/Application/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
 * Copyright (C) 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"
              android:paddingBottom="@dimen/activity_vertical_margin"
              android:paddingRight="@dimen/activity_horizontal_margin"
              android:paddingStart="@dimen/activity_horizontal_margin"
              android:paddingTop="@dimen/activity_vertical_margin">

    <Button
        android:id="@+id/standardViewSignInButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/standard_view_sign_in" />

    <Button
        android:id="@+id/virtualViewSignInButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/activity_vertical_margin"
        android:text="@string/virtual_view_sign_in" />

    <Button
        android:id="@+id/creditCardCheckoutButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/activity_vertical_margin"
        android:text="@string/credit_card_checkout" />

</LinearLayout>