wulkanowy-mod/app/src/main/res/layout/fragment_license.xml

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

    <me.zhanghai.android.materialprogressbar.MaterialProgressBar
        android:id="@+id/licenseProgress"
        style="@style/Widget.MaterialProgressBar.ProgressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:indeterminate="true" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/licenseRecycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:listitem="@layout/item_license" />
</FrameLayout>