Teraplex/app/src/main/res/layout/fragment_schlafzimmer.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:clickable="true"
    android:layout_height="match_parent"
    tools:context=".ui.Schlafzimmer.SchlafzimmerFragment">

    <ImageView
        android:id="@+id/Background"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:scaleType="centerCrop"
        android:src="@drawable/background"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0" />

    <Button
        android:id="@+id/schlafzimmeru3an"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hapticFeedbackEnabled="true"
        android:text="AN"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/schlafzimmeru3aus"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru3" />

    <TextView
        android:id="@+id/schlafzimmeru2"
        android:layout_width="193dp"
        android:layout_height="33dp"
        android:gravity="center_horizontal"
        android:text="Steckdose 2"
        android:textAlignment="center"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/schlafzimmeru3aus"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hapticFeedbackEnabled="true"
        android:text="AUS"
        app:layout_constraintEnd_toStartOf="@+id/schlafzimmeru3an"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru3" />

    <Button
        android:id="@+id/schlafzimmeru2an"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hapticFeedbackEnabled="true"
        android:text="AN"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/schlafzimmeru2aus"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru2" />

    <Button
        android:id="@+id/schlafzimmeru2aus"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:hapticFeedbackEnabled="true"
        android:text="AUS"
        app:layout_constraintEnd_toStartOf="@+id/schlafzimmeru2an"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru2" />

    <TextView
        android:id="@+id/schlafzimmeru1"
        android:layout_width="193dp"
        android:layout_height="33dp"
        android:gravity="center_horizontal"
        android:text="Steckdose 1"
        android:textAlignment="center"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintBottom_toTopOf="@+id/schlafzimmeru2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/schlafzimmeru3"
        android:layout_width="193dp"
        android:layout_height="33dp"
        android:gravity="center_horizontal"
        android:text="Steckdose 3"
        android:textAlignment="center"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru2" />

    <Button
        android:id="@+id/schlafzimmeru1aus"
        android:layout_width="87dp"
        android:layout_height="56dp"
        android:hapticFeedbackEnabled="true"
        android:text="AUS"
        app:layout_constraintEnd_toStartOf="@+id/schlafzimmeru1an"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru1" />

    <Button
        android:id="@+id/schlafzimmeru1an"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hapticFeedbackEnabled="true"
        android:text="AN"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/schlafzimmeru1aus"
        app:layout_constraintTop_toBottomOf="@+id/schlafzimmeru1" />

</androidx.constraintlayout.widget.ConstraintLayout>