ListView嵌套GridView的消息流页面，解决了GridView高度和宽度问题
简单效果图 ![Alt text](http://img.blog.csdn.net/20140901144020298?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvYmJveWZlaXl1/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center "效果图" width="400" height="640")