转自：http://www.cnblogs.com/tao560532/p/4483067.html
出现问题：
消除SDK更新时，有可能会出现这样的错误：
Download interrupted: hostname in certificate didn't match: <dl-ssl.google.com> != <www.google.com>
Download interrupted: Connection to https://dl-ssl.google.com refused
Done. Nothing was installed.
Download interrupted: hostname in certificate didn't match: <dl-ssl.google.com> != <www.google.com>
Download interrupted: Connection to https://dl-ssl.google.com refused
Done. Nothing was installed.
解决办法：
启动 Android SDK Manager ，打开主界面，依次选择「Tools」、「Options...」，弹出『Android SDK Manager - Settings』窗口；
在『Android SDK Manager - Settings』窗口中，在「HTTP Proxy Server」和「HTTP Proxy Port」输入框内填入
mirrors.neusoft.edu.cn和80，并且选中「Force https://... sources to be fetched using http://...」复选框。设置完成后单击「Close」按钮关闭『Android SDK Manager - Settings』窗口返回到主界面；依次选择「Packages」、「Reload」。