关于android SDK安装Failed to fetch URL http://dl-ssl.google.com/android/repository/addons_list-1.xml出错

最近SDK出问题了，SDK Manager一直不能刷新API Level，看图

错误代码：

Fetching http://dl-ssl.google.com/android/repository/addons_list-1.xml  
Failed to fetch URL http://dl-ssl.google.com/android/repository/addons_list-1.xml, reason: Connection to http://dl-ssl.google.com refused  
Fetched Add-ons List successfully  
Fetching URL: <a target="_blank" href="http://dl-ssl.google.com/android/repository/repository-6.xmlFailed">http://dl-ssl.google.com/android/repository/repository-6.xml  
Failed</a> to fetch URL <a target="_blank" href="http://dl-ssl.google.com/android/repository/repository-6.xml">http://dl-ssl.google.com/android/repository/repository-6.xml</a>, reason: Connection to http://dl-ssl.google.com refused  
Done loading packages.  
[html] view plaincopy
Fetching <a target="_blank" href="http://dl-ssl.google.com/android/repository/addons_list-1.xml">https://dl-ssl.google.com/android/repository/addons_list-1.xml</a>  
Failed to fetch URL <a target="_blank" href="http://dl-ssl.google.com/android/repository/addons_list-1.xml">https://dl-ssl.google.com/android/repository/addons_list-1.xml</a>, reason: Connection to <a target="_blank" href="http://dl-ssl.google.com">https://dl-ssl.google.com</a> refused  
Fetched Add-ons List successfully  
Fetching URL: <a target="_blank" href="http://dl-ssl.google.com/android/repository/repository-6.xml">https://dl-ssl.google.com/android/repository/repository-6.xml</a>  
Failed to fetch URL <a target="_blank" href="http://dl-ssl.google.com/android/repository/repository-6.xml">https://dl-ssl.google.com/android/repository/repository-6.xml</a>, reason: Connection to <a target="_blank" href="http://dl-ssl.google.com">https://dl-ssl.google.com</a> refused  
Done loading packages. 

网上找了很多资料，除了使用翻墙软件之外，发现一个很好用的方法啊，来自csdn的某个大神的：http://blog.youkuaiyun.com/springsky_/article/details/7442388

于是照着来，找到菜单栏：Tools——>Options

 如图设置好后点击close，API Level就全部出来了，呵呵，感谢这位大神贡献的方法，在此收录让更多的人看到~~