res/layout/fan_direction.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
 * Copyright (c) 2016, 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.
*/
-->
<merge xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent">
    <ImageView
            android:id="@+id/direction_1"
            android:src="@drawable/ic_fan_direction_1"
            style="@style/HvacButton.FanDirection"/>
    <View
            style="@style/HvacSpacerView"/>
    <ImageView
            android:id="@+id/direction_2"
            android:src="@drawable/ic_fan_direction_2"
            style="@style/HvacButton.FanDirection"/>
    <View
            style="@style/HvacSpacerView"/>
    <ImageView
            android:id="@+id/direction_3"
            android:src="@drawable/ic_fan_direction_3"
            style="@style/HvacButton.FanDirection"/>
    <View
            style="@style/HvacSpacerView"/>
    <ImageView
            android:id="@+id/direction_4"
            android:src="@drawable/ic_fan_direction_4"
            style="@style/HvacButton.FanDirection"/>
</merge>