下载android源码repo sync失败的解决办法

1 今天下载android4.0 源码出了如下错误
 File "/usr/lib/python2.7/threading.py", line 530, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 483, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/yaomoon/work/android/android-4.0.4/.repo/repo/subcmds/sync.py", line 200, in _FetchHelper
    clone_bundle=not opt.no_clone_bundle)
  File "/home/yaomoon/work/android/android-4.0.4/.repo/repo/project.py", line 968, in Sync_NetworkHalf
    and self._ApplyCloneBundle(initial=is_new, quiet=quiet):
  File "/home/yaomoon/work/android/android-4.0.4/.repo/repo/project.py", line 1526, in _ApplyCloneBundle
    exist_dst = self._FetchBundle(bundle_url, bundle_tmp, bundle_dst, quiet)
  File "/home/yaomoon/work/android/android-4.0.4/.repo/repo/project.py", line 1590, in _FetchBundle
    raise DownloadError('%s: %s ' % (req.get_host(), str(e)))
DownloadError: android.googlesource.com: <urlopen error [Errno 110] Connection timed out>

2 解决办法
vim /etc/hosts
在文件中加入如下信息
74.125.71.82 www.googlesource.com
74.125.71.82 android.googlesource.com 
203.208.46.172 cache.pack.google.com
59.24.3.173cache.pack.google.com
 
然后重新repo init
repo sync
即可