软件更新功能

转载：

 

http://blog.csdn.net/android_tutor/article/details/7015986?reload

 

http://daosrc.com/?p=439

 

http://www.eoeandroid.com/forum.php?mod=viewthread&tid=249108

 

http://blog.csdn.net/encienqi/article/details/8291810