res/drawable/below_shadow.xml

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <shape xmlns:android="http://schemas.android.com/apk/res/android">
   3     <gradient
   4         android:startColor="#20000000"
   5         android:endColor="@android:color/transparent"
   6         android:angle="270" >
   7     </gradient>
   8 </shape>