<!--?xml version="1.0" encoding="UTF-8"?-->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
	 <item android:drawable="@drawable/salesvolume_down" android:state_checked="true"><!--选中时效果 --></item>
    <item android:drawable="@drawable/salesvolume" android:state_checked="false"><!--未选中时效果 -->
</item></selector>