1.修改C:\Windows\System32\drivers\etc目录下的hosts文件（改前可以先备份）
修改后的文件内容为：
127.0.0.1 localhost
#Google主页
203.208.46.146 www.google.com
#这行是为了方便打开Android开发官网 现在好像不VPN也可以打开
74.125.113.121 developer.android.com
#更新的内容从以下地址下载
203.208.46.146 dl.google.com
203.208.46.146 dl-ssl.google.com
****************************************
2.打开android sdk manager中tools下的Options窗口，
勾上 others中的Force Https://...
其他都为空就可以了，祝你成功。
windows系统中hosts文件的位置为：C:\Windows\System32\drivers\etc ，找到该文件并已文本形式打开，添加上面一句话，保存之后关闭，重启Eclipse打开Android SDK Manager，ok!
把如下的内容复制保存为hosts,然后替换掉 C:\Windows\System32\drivers\etc\目录下的 hosts，就可以方便的使用google.com啦
203.208.46.1 plus.google.com
203.208.46.1 accounts.google.com
203.208.46.1 picasaweb.google.com
203.208.46.1 lh1.ggpht.com
203.208.46.1 lh2.ggpht.com
203.208.46.1 lh3.ggpht.com
203.208.46.1 lh4.ggpht.com
203.208.46.1 lh5.ggpht.com
203.208.46.1 lh6.ggpht.com
203.208.46.1 lh6.googleusercontent.com
203.208.46.1 lh5.googleusercontent.com
203.208.46.1 lh4.googleusercontent.com
203.208.46.1 lh3.googleusercontent.com
203.208.46.1 lh2.googleusercontent.com
203.208.46.1 lh1.googleusercontent.com
203.208.46.1 talkgadget.google.com
203.208.46.1 profiles.google.com
203.208.46.1 webcache.googleusercontent.com
203.208.46.1 sites.google.com
203.208.46.1 mail.google.com
203.208.46.1 www.google.com.hk
203.208.46.1 www.google.com
203.208.46.1 news.google.com
203.208.46.1 code.google.com
203.208.46.1 docs.google.com
203.208.46.1 services.google.com
203.208.46.1 clients4.google.com
203.208.46.1 clients2.google.com
203.208.46.1 chrome.google.com
203.208.46.1 tools.google.com
203.208.46.1 sites.google.com
203.208.46.1 accounts.google.com
209.85.229.18 reader.google.com
--------------------------------------------------------
#Google+ Hosts IP
74.125.237.1 plus.google.com
74.125.237.1 plus.google.com.hk
74.125.237.1 talkgadget.google.com
74.125.237.1 picasaweb.google.com
74.125.237.1 lh1.ggpht.com
74.125.237.1 lh2.ggpht.com
74.125.237.1 lh3.ggpht.com
74.125.237.1 lh4.ggpht.com
74.125.237.1 lh5.ggpht.com
74.125.237.1 lh6.ggpht.com
74.125.237.1 lh6.googleusercontent.com
74.125.237.1 lh5.googleusercontent.com
74.125.237.1 lh4.googleusercontent.com
74.125.237.1 lh3.googleusercontent.com
74.125.237.1 lh2.googleusercontent.com
74.125.237.1 lh1.googleusercontent.com
##Chrome 网上应用店
74.125.237.1 chrome.google.com
74.125.237.1 clients0.google.com
74.125.237.1 clients1.google.com
74.125.237.1 clients2.google.com
74.125.237.1 clients3.google.com
74.125.237.1 clients4.google.com
74.125.237.1 www.googleusercontent.com
74.125.237.1 lh0.googleusercontent.com
74.125.237.1 lh1.googleusercontent.com
74.125.237.1 lh2.googleusercontent.com
74.125.237.1 lh3.googleusercontent.com
74.125.237.1 lh4.googleusercontent.com
74.125.237.1 lh5.googleusercontent.com
74.125.237.1 lh6.googleusercontent.com
74.125.237.1 clients1.googleusercontent.com
74.125.237.1 clients2.googleusercontent.com
##网页快照
68.68.107.69 webcache.googleusercontent.com
##Google SSL
74.125.237.1 encrypted.google.com
74.125.237.1 encrypted.google.com.hk
##Google Docs
74.125.237.1 docs.google.com
74.125.237.1 docs0.google.com
74.125.237.1 docs1.google.com
74.125.237.1 docs2.google.com
74.125.237.1 docs3.google.com
74.125.237.1 spreadsheets.google.com
74.125.237.1 spreadsheets0.google.com
74.125.237.1 spreadsheets1.google.com
74.125.237.1 spreadsheets2.google.com
74.125.237.1 spreadsheets3.google.com
#Gmail
74.125.237.1 mail.google.com
74.125.237.1 chatenabled.mail.google.com #Gmail中Gtalk聊天服务
##Google 搜索
74.125.237.1 www.google.com
##Google preview
74.125.237.1 www.googlepreview.com
##Google 翻译
74.125.237.1 translate.google.com
74.125.237.1 translate.googleapis.com
##Google 搜索建议(IE9)
74.125.237.1 clients5.google.com
##Google code
74.125.237.1 code.google.com
##Picasa 网络相册
74.125.237.1 picasaweb.google.com
74.125.237.1 lh0.ggpht.com
74.125.237.1 lh1.ggpht.com
74.125.237.1 lh2.ggpht.com
74.125.237.1 lh3.ggpht.com
74.125.237.1 lh4.ggpht.com
74.125.237.1 lh5.ggpht.com
74.125.237.1 lh6.ggpht.com
74.125.237.1 lh7.ggpht.com
74.125.237.1 lh8.ggpht.com
74.125.237.1 lh8.ggpht.com
74.125.237.1 lh9.ggpht.com
74.125.237.1 lh6.google.com
##Google 个人资料
74.125.237.1 profiles.google.com
74.125.237.1 browsersync.google.com
##Google+
74.125.237.1 talkgadget.google.com
##Google+中的聊天服务
74.125.237.1 ssl.gstatic.com
74.125.237.1 images-pos-opensocial.googleusercontent.com
74.125.237.1 images1-focus-opensocial.googleusercontent.com
74.125.237.1 images2-focus-opensocial.googleusercontent.com
74.125.237.1 images3-focus-opensocial.googleusercontent.com
74.125.237.1 images4-focus-opensocial.googleusercontent.com
74.125.237.1 images5-focus-opensocial.googleusercontent.com
74.125.237.1 images6-focus-opensocial.googleusercontent.com
74.125.237.1 plus.google.com
##Download 下载
74.125.237.1 dl.google.com
74.125.237.1 dl-ssl.google.com
##Groups
74.125.237.1 groups.google.com
##Google URL Shortener
74.125.237.1 goo.gl
##Google app engine
74.125.237.1 appengine.google.com
以上就是android sdk manager无法更新方法了，大家赶紧用这个方法解决问题吧！