activity_main2.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:layout_height="match_parent"
    android:background="@drawable/gradient"
    android:gravity="center_vertical"
    tools:context=".MainActivity2">

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="391dp"
        android:layout_height="200dp"
        android:layout_marginStart="20dp"
        android:layout_marginTop="100dp"
        android:layout_marginEnd="20dp"
        android:layout_marginBottom="100dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="73dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="50dp"
            android:layout_marginRight="10dp"
            android:gravity="center"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:text="@string/email_sent_succesfully"
            android:textColor="#FFFFFF"
            android:textSize="28sp" />

    </LinearLayout>

    <Button
        android:id="@+id/btnTry"
        android:layout_width="150dp"
        android:layout_height="75dp"
        android:layout_marginEnd="76dp"
        android:backgroundTint="#26D0CE"
        android:text="@string/try_again"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/btnExit"
        app:layout_constraintTop_toTopOf="@+id/linearLayout" />

    <Button
        android:id="@+id/btnExit"
        android:layout_width="150dp"
        android:layout_height="75dp"
        android:layout_marginTop="276dp"
        android:layout_marginEnd="16dp"
        android:backgroundTint="#26D0CE"
        android:text="@string/exit"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="@+id/btnTry"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@+id/linearLayout"
        app:layout_constraintVertical_bias="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>