car/res/layout/car_alpha_jump_button.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright 2018 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.
  -->

<!-- This is sized in code, so we'll set it to 0dp for now. -->
<android.support.v7.widget.CardView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:grid="http://schemas.android.com/apk/res-auto"
        android:layout_width="0dp"
        android:layout_height="0dp"
        grid:layout_gravity="fill"
        grid:layout_columnWeight="1"
        grid:layout_rowWeight="1"
        android:layout_margin="@dimen/car_padding_2">
    <TextView
        android:textAppearance="@style/TextAppearance.Car.Title"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/car_card_ripple_background"
        android:id="@+id/button"
        android:gravity="center"/>
</android.support.v7.widget.CardView>