<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <item>
        <shape android:shape="rectangle">
            <solid android:color="@color/grey_lighten_30" />
        </shape>
    </item>

    <item android:top="1dp">
        <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
            <solid android:color="@color/white" />
        </shape>
    </item>

</layer-list>