Signal-Android/app/src/main/res/layout/donation_receipt_detail_fragment.xml

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

    <include layout="@layout/dsl_settings_toolbar" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="16dp"
        android:orientation="vertical"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constraintBottom_toTopOf="@+id/share_png"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/toolbar" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/share_png"
        style="@style/Signal.Widget.Button.Large.Primary"
        android:layout_width="match_parent"
        android:layout_height="48sp"
        android:layout_marginStart="48dp"
        android:layout_marginEnd="48dp"
        android:layout_marginBottom="16dp"
        android:text="@string/DonationReceiptDetailsFragment__share_receipt"
        android:textColor="@color/signal_text_secondary"
        app:backgroundTint="@color/signal_background_secondary"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>