解决Android SDK下载和更新失败的方法详解
原文：http://www.jb51.net/article/37175.htm
最近刚换了电脑，开始搭建Android开发环境的时候，下载SDK总是会出现如下错误：
Failed to fetch URL http://dl-ssl.google.com/android/repository/addons_list-1.xml.
说dl-ssl.google.com在大陆被强了，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：
1 # Copyright (c) 1993-2009 Microsoft Corp. 2 3 # 4 5 # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. 6 7 # 8 9 # This file contains the mappings of IP addresses to host names. Each 10 11 # entry should be kept on an individual line. The IP address should 12 13 # be placed in the first column followed by the corresponding host name. 14 15 # The IP address and the host name should be separated by at least one 16 17 # space. 18 19 # 20 21 # Additionally, comments (such as these) may be inserted on individual 22 23 # lines or following the machine name denoted by a '#' symbol. 24 25 # 26 27 # For example: 28 29 # 30 31 # 102.54.94.97 rhino.acme.com # source server 32 33 # 38.25.63.10 x.acme.com # x client host 34 # localhost name resolution is handled within DNS itself. 35 36 # 127.0.0.1 localhost 37 38 # ::1 localhost 39 40 //亲，就是增加这一句哦 41 42 74.125.237.1 dl-ssl.google.com 43 44
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：
