car_product/car_ui_portrait/rro/CarUiPortraitNotificationRRO/res/layout/notification_center_activity.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.
  -->

<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">

    <com.android.car.ui.FocusParkingView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <com.android.car.ui.FocusArea
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <com.android.car.notification.CarNotificationView
            android:id="@+id/notification_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <FrameLayout
                android:id="@+id/exit_button_container"
                android:layout_width="0dp"
                android:layout_height="0dp"
                android:visibility="gone"/>

            <TextView
                android:id="@+id/empty_notification_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintBottom_toTopOf="@id/manage_button"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_chainStyle="packed"
                android:text="@string/empty_notification_header"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:visibility="gone"/>

            <Button
                android:id="@+id/manage_button"
                style="@style/ManageButton"
                android:layout_width="wrap_content"
                android:layout_height="@dimen/manage_button_height"
                android:layout_marginTop="@dimen/manage_button_top_margin"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/empty_notification_text"
                app:layout_constraintVertical_chainStyle="packed"
                android:text="@string/manage_text"
                android:visibility="gone"/>

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/notifications"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:orientation="vertical"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/notification_center_title"/>
        </com.android.car.notification.CarNotificationView>
    </com.android.car.ui.FocusArea>
</FrameLayout>