<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

  <ImageView
      android:id="@+id/qrCode"
      android:contentDescription="@string/qr_code_description"
      android:layout_gravity="center_horizontal"
      android:layout_width="200dp"
      android:layout_height="200dp" />
</LinearLayout>