Android画虚线显示的时候却是实线问题

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="line" xmlns:android="https://schemas.android.com/apk/res/android" >
	<stroke 
	    android:width="1dp"
	    android:color="@color/border_line"
	    android:dashWidth="2dp"
	    android:dashGap="2dp"/>
	<size android:height="2dp"/>
</shape><?xml version="1.0" encoding="utf-8"?>
<shape a