<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <solid android:color="@color/col_EDEDED" /><!--    边框颜色 -->
        </shape>
    </item>
    
    <item android:bottom="1dp"><!-- 向下平移1dp -->
        <shape>
            <solid android:color="@color/col_FFFFFF" /> <!--   View填充颜色 -->
        </shape>
    </item>

</layer-list>