Using this lib with CardView: Background color problem about ultimaterecyclerview HOT 7 CLOSED

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:fab="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:background="@color/grey_dedede">

    <com.marshalchen.ultimaterecyclerview.UltimateRecyclerView
        android:id="@+id/rvCardRecyclerView"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        app:recyclerviewClipToPadding="true"
        app:recyclerviewPadding="2dp"
        app:recyclerviewEmptyView="@layout/empty_view">
    </com.marshalchen.ultimaterecyclerview.UltimateRecyclerView>
...