<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
                android:background="@color/blue"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content">
    <ProgressBar
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</RelativeLayout>