1、解决国内访问Google服务器的困难
启动 Android SDK Manager ，打开主界面，依次选择「Tools」、「Options...」，弹出『Android SDK Manager - Settings』窗口；
在『Android SDK Manager - Settings』窗口中，在「HTTP Proxy Server」和「HTTP Proxy Port」输入框内填入mirrors.neusoft.edu.cn和80，并且选中「Force
https://...
sources to be fetched using
http://...
」复选框。设置完成后单击「Close」按钮关闭『Android SDK Manager - Settings』窗口返回到主界面；
依次选择「Packages」、「Reload」
2. Error:A problem occurred configuring project ':Test'.
> Could not resolve all dependencies for configuration ':Test:_debugCompile'.
> Could not find any version that matches com.android.support:appcompat-v7:19.+.
Required by:XXXXX':unspecified
更新上述SDK后解决问题
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