Fuck GFW

You know!!!!
$ vim /Applications/Android\ Studio.app/bin/idea.vmoptions
-Djava.net.preferIPv4Stack=true
-Didea.updates.url=http://dl.google.com/android/studio/patches/updates.xml
-Didea.patches.url=http://dl.google.com/android/studio/patches/

see: http://blog.csdn.net/liugangnhm/article/details/10011831