图片平铺 repeat-x repeat-y

转：http://www.maxiaoguo.com/shipin/323.html

drawble这个bitmap就可以了

<?xml version ="1.0" encoding ="utf-8" ?>    

<bitmap    
    xmlns:android="http://schemas.android.com/apk/res/android"    
    android:src="@drawable/friend_addfriend_bg"  
    android:filter="true"  
    android:antialias="true"
    android:tileMode="repeat" />