CoordinatorLayout layout_anchor does not work
Try this code. You need to use app:layout_behavior in your RecyclerView
<android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior"/><android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_marginBottom="16dp" android:layout_marginEnd="16dp" android:layout_marginRight="16dp" android:src="@drawable/ic_fab_add" android:onClick="onAddPlayerClick" app:elevation="4dp" app:borderWidth="0dp" app:layout_anchor="@id/appbar" app:layout_anchorGravity="bottom|right|end" android:clickable="true"/>