转载自：http://blog.csdn.net/android_tutor/article/details/7425021

据说dl-ssl.google.com在大陆被强了，伟大的天朝真是不让人活了，解决方法就是修改C:\Windows\System32\drivers\etc\hosts文件。添加一行：

74.125.237.1       dl-ssl.google.com

这里需要注意的是hosts文件是只读的，我们没有权限修改，需要我们将hosts文件复制到桌面或者其他地方，然后修改，代码如下：

# Copyright (c) 1993-2009 Microsoft Corp.  
#  
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.  
#  
# This file contains the mappings of IP addresses to host names. Each  
# entry should be kept on an individual line. The IP address should  
# be placed in the first column followed by the corresponding host name.  
# The IP address and the host name should be separated by at least one  
# space.  
#  
# Additionally, comments (such as these) may be inserted on individual  
# lines or following the machine name denoted by a '#' symbol.  
#  
# For example:  
#  
#      102.54.94.97     rhino.acme.com          # source server  
#       38.25.63.10     x.acme.com              # x client host  
  
# localhost name resolution is handled within DNS itself.  
#   127.0.0.1       localhost  
#   ::1             localhost  
//亲，就是增加这一句哦  
74.125.237.1       dl-ssl.google.com

然后保存，复制修改后的hosts文件到C:\Windows\System32\drivers\etc 目录，替换文件就好！！！我们再次下载SDK的时候就会成功啦，如下图：

PS：补充下，在mac或Linux中，hosts文件所在位置为/etc/hosts，可以使用sudo vim /etc/hosts来编辑。