Android drawable shape绘制边框

自己用xml实现shape，需要绘制边框，最后的结果如下！

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

    <item android:right="0dp">
        <shape android:shape="rectangle" >
            <solid android:color="@color/greennormal" />
        </shape>
    </item>
    <item android:right="1dp" android:top="1dp" android:left="1dp" android:bottom="1dp">
        <shape android:shape="rectangle" >
            <solid android:color="@color/white" />
        </shape>
    </item>

</layer-list><layer-list