<?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:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/heading"
        android:textSize="36sp"
        android:visibility="visible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/startButton"
        android:layout_width="191dp"
        android:layout_height="68dp"
        android:layout_marginStart="106dp"
        android:layout_marginTop="73dp"
        android:text="@string/startButtonText"
        android:visibility="visible"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView" />

    <Button
        android:id="@+id/stopButton"
        android:layout_width="210dp"
        android:layout_height="67dp"
        android:layout_marginStart="100dp"
        android:layout_marginTop="71dp"
        android:text="@string/stopButtonText"
        android:visibility="visible"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/startButton" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="261dp"
        android:layout_height="191dp"
        android:layout_marginStart="63dp"
        android:layout_marginTop="26dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@android:drawable/picture_frame" />

</androidx.constraintlayout.widget.ConstraintLayout>