Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
此外 HorizontalScrollView取代Gallery实现图片滚动
Android开发 notifyDataSetChanged(),布布扣,bubuko.com
Android开发 notifyDataSetChanged()
原文：http://www.cnblogs.com/meixinmeifei/p/3773565.html