现象：更换android studio libs文件夹下的jar包，重新编译代码报错：Cannot locate factory for objects of type DefaultGradleConnector, as ConnectorServiceRegistry has been closed.
解决办法：重启android studio
参考链接：http://code.google.com/p/android/issues/detail?id=80591
原文：http://www.cnblogs.com/butterfly-clover/p/5867564.html