Gadgetbridge/app/src/main/res/layout/activity_configure_alarms.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:fitsSystemWindows="true"
    tools:context="nodomain.freeyourgadget.gadgetbridge.activities.ConfigureAlarms">

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:divider="@null"
        android:id="@+id/alarm_list" />
</RelativeLayout>