GUTSchedule/GUT.Schedule/GUT.Schedule/Resources/layout/Export.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:theme="@style/AppTheme.Light.SplashScreen">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerInParent="true">

        <ProgressBar
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:indeterminateTint="#fff"
            android:layout_gravity="center_horizontal"
            android:layout_margin="20dp"/>

        <TextView
            android:id="@+id/status"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Загрузка"
            android:textColor="#fff"
            android:layout_gravity="center_horizontal"
        />
    </LinearLayout>

</RelativeLayout>