1.上图SDK Manager 的 Tools ->Options打开SDK Manager的Settings,
选中“Force https://… sources to be fetched using http://…”,
强制使用http协议。

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2.改hosts文件。
Windows在C:WINDOWSsystem32driversetc目录下,
Linux用户打开/etc/hosts文件,
打开文件后添加以下内容:
#android更新
203.208.46.146 dl.google.com
203.208.46.146 dl-ssl.google.com