app/src/main/res/layout/view_buttons_test.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/button_volume_up"
        android:layout_width="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_height="wrap_content"
        android:text="@string/buttons_volume_up"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/buttons_unpressed"
        android:id="@+id/button_volume_up_value"
        android:layout_alignBottom="@id/button_volume_up"
        android:layout_toEndOf="@id/button_volume_up" />

    <TextView
        android:id="@+id/button_volume_down"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_below="@+id/button_volume_up"
        android:text="@string/buttons_volume_down"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/buttons_unpressed"
        android:id="@+id/button_volume_down_value"
        android:layout_alignBottom="@id/button_volume_down"
        android:layout_toEndOf="@id/button_volume_down" />

    <TextView
        android:id="@+id/button_camera"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_below="@id/button_volume_down"
        android:text="@string/buttons_camera"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/buttons_unpressed"
        android:id="@+id/button_camera_value"
        android:layout_alignBottom="@id/button_camera"
        android:layout_toEndOf="@id/button_camera" />

    <!--<TextView-->
        <!--android:id="@+id/button_power"-->
        <!--android:layout_width="wrap_content"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:textAppearance="?android:attr/textAppearanceMedium"-->
        <!--android:layout_below="@id/button_camera"-->
        <!--android:text="@string/buttons_power"/>-->

    <!--<TextView-->
        <!--android:layout_width="wrap_content"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:textAppearance="?android:attr/textAppearanceMedium"-->
        <!--android:text="@string/not_available"-->
        <!--android:id="@+id/button_power_value"-->
        <!--android:layout_alignBottom="@id/button_power"-->
        <!--android:layout_toEndOf="@id/button_power" />-->

</RelativeLayout>