解决方法:
用记事本打开hosts(C:\WINDOWS\system32\drivers\etc)文件,在hosts文件末尾中添加:
203.208.46.146 www.google.com
74.125.113.121 developer.android.com
203.208.46.146 dl.google.com
203.208.46.146 dl-ssl.google.com
其他内容不做修改
打开Android SDK Manager,在Tools的options中勾选Force https://...sources to....
原理见:
http://blog.youkuaiyun.com/pishum/article/details/38175191