<?xml version="1.0" encoding="utf-8"?>

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

     <item>

         <shape>

             <corners

                 android:topLeftRadius="5dp"

                 android:topRightRadius="5dp" />

             <solid android:color="#ff66ff66" />

         </shape>

     </item>

     <!-- 上层 -->

     <item

         android:left="1dp"

         android:right="1dp"

         android:top="1dp">

         <shape>

             <corners

                 android:topLeftRadius="5dp"

                 android:topRightRadius="5dp" />

             <solid android:color="#ffffffff" />

         </shape>

     </item>

 </layer-list>