input/autofill/AutofillFramework/Application/src/main/res/layout/recycler_view_activity.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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:weightSum="1">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.8"
        tools:listItem="@layout/user_data_field" />

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.2">

        <TextView
            android:id="@+id/clearButton"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/spacing_normal"
            android:layout_marginStart="@dimen/spacing_normal"
            android:layout_marginTop="@dimen/spacing_normal"
            android:text="@string/clear_label"
            android:textColor="@android:color/holo_blue_dark"
            app:layout_constraintEnd_toStartOf="@+id/submitButton"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintHorizontal_chainStyle="packed"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="parent" />

        <TextView
            android:id="@+id/submitButton"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="@dimen/spacing_normal"
            android:layout_marginStart="@dimen/spacing_normal"
            android:text="@string/submit_label"
            android:textColor="@android:color/holo_blue_dark"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toEndOf="@+id/clearButton"
            app:layout_constraintTop_toTopOf="@+id/clearButton" />
    </android.support.constraint.ConstraintLayout>
</LinearLayout>