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

<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <Spinner
            android:id="@+id/select_kind"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:spinnerMode="dialog" />

        <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
            android:id="@+id/list_activity_swipe_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ListView
                android:id="@+id/itemListView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
    </LinearLayout>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_gravity="bottom|end"
        app:srcCompat="@drawable/ic_action_fetch_activity_data"
        android:tint="@android:color/white"
        android:layout_margin="16dp" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>