1<?xml version="1.0" encoding="utf-8"?>
2<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
3    xmlns:app="http://schemas.android.com/apk/res-auto"
4    xmlns:tools="http://schemas.android.com/tools"
5    android:layout_width="match_parent"
6    android:layout_height="match_parent"
7    tools:context=".MainActivity">
8  <Button
9      android:id="@+id/adIdButton"
10      android:layout_width="wrap_content"
11      android:layout_height="wrap_content"
12      android:text="@string/ad_id"
13      app:layout_constraintStart_toStartOf="parent"
14      app:layout_constraintEnd_toEndOf="parent"
15      app:layout_constraintTop_toTopOf="parent"
16      app:layout_constraintBottom_toBottomOf="parent"
17  />
18
19  <TextView
20      android:id="@+id/adIdTextView"
21      android:layout_width="wrap_content"
22      android:layout_height="wrap_content"
23      android:text=""
24      app:layout_constraintEnd_toEndOf="parent"
25      app:layout_constraintStart_toStartOf="parent"
26      app:layout_constraintTop_toBottomOf="@id/adIdButton"
27      android:layout_marginTop="20dp"/>
28</androidx.constraintlayout.widget.ConstraintLayout>