RotaryPlayground/res/layout/rotary_scroll.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
    Copyright (C) 2020 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.
-->

<com.android.car.ui.FocusArea
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:singleLine="true"/>

    <!-- Use contentDescription to enable rotary scrolling for this view. With rotary scrolling
         enabled, rotation will scroll rather than moving the focus if moving the focus would
         cause a lot of scrolling. Rotary scrolling should be enabled for scrolling views which
         contain content which the user may want to see but can't interact with, either alone or
         with interactive (focusable) content. -->
    <com.android.car.ui.recyclerview.CarUiRecyclerView
        android:id="@+id/rotary_scroll_view"
        android:contentDescription="com.android.car.ui.utils.VERTICALLY_SCROLLABLE"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>
    <!-- TODO(b/171339427) Use app:rotaryScrollEnabled instead of contentDescription. -->

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:singleLine="true"/>

</com.android.car.ui.FocusArea>