res/color/pin_pad_icon_background_color.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2022 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.
  -->

<ripple
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/car_control_highlight">
    <item>
        <selector>
            <item android:state_activated="true">
                <shape>
                    <solid android:color="@color/car_control_highlight"/>
                    <corners android:radius="@dimen/pin_pad_key_radius"/>
                </shape>
            </item>
            <item android:state_focused="true" android:state_pressed="true">
                <shape>
                    <solid android:color="@color/car_rotary_focus_pressed_fill_color"/>
                    <stroke android:width="@dimen/car_rotary_focus_pressed_stroke_width" android:color="@color/car_rotary_focus_stroke_color"/>
                    <corners android:radius="@dimen/pin_pad_key_radius"/>
                </shape>
            </item>
            <item android:state_focused="true">
                <shape>
                    <solid android:color="@color/car_rotary_focus_fill_color"/>
                    <stroke android:width="@dimen/car_rotary_focus_stroke_width" android:color="@color/car_rotary_focus_stroke_color"/>
                    <corners android:radius="@dimen/pin_pad_key_radius"/>
                </shape>
            </item>
            <item>
                <shape>
                    <solid android:color="@color/car_secondary_container"/>
                    <corners android:radius="@dimen/pin_pad_key_radius"/>
                </shape>
            </item>
        </selector>
    </item>

    <item android:id="@android:id/mask">
        <shape>
            <corners android:radius="@dimen/pin_pad_key_radius"/>
            <!-- This is a mask color and needs to be set. Would not show in UI. -->
            <solid android:color="@android:color/white"/>
        </shape>
    </item>
</ripple>