http://blog.csdn.net/singleton1900/article/details/12911333
今天更新sdk，遇到了更新下載失敗問題：
Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml
Fetched Add-ons List successfully
Fetching URL: https://dl-ssl.google.com/android/repository/repository-8.xml
Done loading packages.
Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml
Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-2.xml, reason: Connection to https://dl-ssl.google.com refused
Fetched Add-ons List successfully
Fetching URL: https://dl-ssl.google.com/android/repository/repository-8.xml
Failed to fetch URL https://dl-ssl.google.com/android/repository/repository-8.xml, reason: HttpHostConnect Connection to https://dl-ssl.google.com refused
Done loading packages.
搜索了下，解決方案如下：
解決國內訪問Google服務器的困難：
1.啓動 Android SDK Manager ；
2.打開主界面，依次選擇「Tools」、「Options...」，彈出『Android SDK Manager - Settings』窗口；
3.在『Android SDK Manager - Settings』窗口中，在「HTTP Proxy Server」和「HTTP Proxy Port」輸入框內填入mirrors.neusoft.edu.cn和80，並且選中「Force https://... sources to be fetched using http://...」複選框；4.設置完成後單擊「Close」按鈕關閉『Android SDK Manager - Settings』窗口返回到主界面；
5.依次選擇「Packages」、「Reload」。
如此，問題解決~