I use shape drawable to draw a background as below:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startColor="#888888"
        android:endColor="#888888"
        android:angle="270"/>
    <corners android:topLeftRadius="4dip"
        android:topRightRadius="4dip"/>
    <stroke
        android:width="2dip"
        android:color="#666666"
        android:dashWidth="10dip"
        android:dashGap="0dip" />
</shape> 
I want to set the bottom edge without stroke.
How can I modify it?  
 
    