Android SDK Manager解决更新时的问题 ：Failed to fetch URL…

Failed to fectch URl https://dl-ssl.google.com/android/repository/addons_list.xml, reason: Connection to https://dl-ssl.google.com refused        安装使用SDK Manager更新时出现问题 Failed to fetch URL  https://dl-ssl.google.com/android/repository/repository-6.xml, reason:  Connection to https://dl-ssl.google.co