Android SDK下載和更新失敗的解決方法！！！

最近剛換了電腦，開始搭建Android開發環境的時候，下載SDK總是會出現如下錯誤：

Failed to fetch URL http://dl-ssl.google.com/android/repository/addons_list-1.xml.

據說dl-ssl.google.com在大陸被強了，偉大的天朝真是不讓人活了，解決方法就是修改C:\Windows\System32\drivers\etc\hosts文件。添加一行：

74.125.237.1       dl-ssl.google.com

這裏需要注意的是hosts文件是隻讀的，我們沒有權限修改，需要我們將hosts文件複製到桌面或者其他地方，然後修改，代碼如下：

# 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
//親，就是增加這一句哦
74.125.237.1       dl-ssl.google.com

然後保存，複製修改後的hosts文件到C:\Windows\System32\drivers\etc 目錄，替換文件就好！！！我們再次下載SDK的時候就會成功啦，如下圖：

嘿嘿，大功告成啦！！！

PS：補充下，在mac或Linux中，hosts文件所在位置爲/etc/hosts，可以使用sudo vim /etc/hosts來編輯。

文章來源：http://blog.csdn.net/android_tutor/article/details/7425021