<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp">

    <ProgressBar
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_centerInParent="true"
        android:visibility="visible" />
</RelativeLayout>