android shape stroke只绘制一边或者某几边

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:right="-2dp"
        android:top="-2dp">
        <shape>
            <solid android:color="@color/white" />
            <stroke
                android:width="1px"
                android:color="@color/split_line" />
        </shape>
    </item>
</layer-list>

-2dp表示不绘制这一边