1:window-->android sdk mannger--->tools--options---
http proxy server ubuntu.buct.edu.cn
http proxy port 80
选择 use download cache
选择 force https://..sources to be fetched using http://..
1:window-->android sdk mannger--->tools--options---
http proxy server ubuntu.buct.edu.cn
http proxy port 80
选择 use download cache
选择 force https://..sources to be fetched using http://..