resulLayout

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="40dp"
    tools:context=".ResultTestActivity">

    <TextView
        android:id="@+id/resultTitle"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="Результаты теста"
        android:textAlignment="center"
        android:textSize="40dp"
        android:layout_marginTop="40dp"
        app:layout_constraintBottom_toTopOf="@id/tvScore"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/tvScore"
        android:text="20/20"
        android:textSize="30dp"
        android:layout_marginTop="40dp"
        android:gravity="center"
        app:layout_constraintTop_toBottomOf="@id/resultTitle"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        />
    <Button
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/btnQuit"
        android:text="Конец теста"
        android:textSize="30dp"
        android:padding="15dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tvScore"
        app:layout_constraintBottom_toBottomOf="parent"
        />
</androidx.constraintlayout.widget.ConstraintLayout>