1：android Uri 介绍
http://www.cnblogs.com/lingyun1120/archive/2012/04/18/2455212.html
2:File 转成Uri
<span style="font-size:18px;"> File file = null; Uri uri = Uri.fromFile(file)</span>
android uri , file , string 互转,布布扣,bubuko.com
android uri , file , string 互转
原文地址：http://blog.csdn.net/ab601026460/article/details/32132603
