riff_app/app/src/main/res/layout-v21/fragment_news.xml

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

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/news_recycler"
        android:scrollbars="vertical"
        >

    </androidx.recyclerview.widget.RecyclerView>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>