如果你访问互联网需要代理的话，还需要加上一个句命令。

mkdir ~/bin

curl --insecure https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo

chmod a+x ~/bin/repo

mkdir ~/bin

curl --insecure --proxy 127.0.0.2:8080 https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo

chmod a+x ~/bin/repo

假设代理服务器为“127.0.0.2::8080”，则命令为：

git config --global http.proxy "127.0.0.2:8080"

到此git就配置好了。

1.5、安装repo客服端

1.5.1、新建一个工作目录WORKING_DIRECTORY，切换到该目录，以便存放Android源码：

在shell命令行，输入以下命令：

$ mkdir WORKING_DIRECTORY $ cd WORKING_DIRECTORY

15.2、Run repo init to bring down the latest version of Repo with all its most recent bug fixes. You must specify a URL for the manifest, which specifies where the various repositories included in the Android source will be placed within your working directory.

$ repo init -u https://android.googlesource.com/platform/manifest 

To check out a branch other than "master", specify it with -b:

$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1

1.5.3、When prompted, please configure Repo with your real name and email address. To use the Gerrit code-review tool, you will need an email address that is connected with a registered Google account. Make sure this is a live address at which you can receive messages. The name that you provide here will show up in attributions for your code submissions.在运行1.5.2的命令时，会弹出一个要求输入你的gmail邮箱的提示。最好输入有效的邮箱地址。

A successful initialization will end with a message stating that Repo is initialized in your working directory. Your client directory should now contain a .repo directory where files such as the manifest will be kept.

在repo完成初始化后，你再当前目录下，应该能看到一个".repo"目录，manifest等就在该目录下。

如果你在这步遇到gpg验证出错，抛异常。那么请修改~/bin/repo文件的第187行来跳过gpg验证。

如下：

另外，我们可以通过在浏览器中输入https://android.googlesource.com/platform/manifest来获得各个版本对应的branch

由于访问这个地址很慢，我就把它的内容贴到了我博客上。具体请访问《Android发布版本所对应源码的branch》

1.6、取得源码

To pull down files to your working directory from the repositories as specified in the default manifest, run

$ repo sync 

The Android source files will be located in your working directory under their project names. The initial sync operation will take an hour or more to complete. For more about repo sync and other Repo commands, see Version Control.

执行上面的命令，Android的源码就开始下载了，它将被下载到".repo"目录的"projects"目录下。

1.7、下载kernel源码

执行以下命令

这时我们可以通过执行git checkout android-3.0得到kernel3.0源码同样，

同理同过执行git checkout android-2.6.39将得到kernel2.6.39源码

二、Linux平台

在Linux平台下载Android源码,就要轻松的得多了。cygiwn都不用装。但是如果你的系统上还没有curl, git and python的话，请先安装它们。

2.1、添加path路径

编辑.bashrc添加path路径。.bashrc文件位于"/home/%用户%"这个目录

请参照1.3

2.3、配置git

同1.4

2.4、安装repo客服端

同1.5

2.5、以匿名方式取得源码

同1.6

2.6、以授权方式取得代码

如果你需要向google提交对原生Android的修改。你就需要以授权方式取得代码。

By default, access to the Android source code is anonymous. To protect the servers against excessive usage, each IP address is associated with a quota.

When sharing an IP address with other users (e.g. when accessing the source repositories from beyond a NAT firewall), the quotas can trigger even for regular usage patterns (e.g. if many users sync new clients from the same IP address within a short period).

In that case, it is possible to use authenticated access, which then uses a separate quota for each user, regardless of the IP address.

The first step is to create a password from the password generator and to save it in ~/.netrc according to the instructions on that page.

The second step is to force authenticated access, by using the following manifest URI: https://android.googlesource.com/a/platform/manifest. Notice how the /a/directory prefix triggers mandatory authentication. You can convert an existing client to use mandatory authentication with the following command:

$ repo init -u https://android.googlesource.com/a/platform/manifest 

2.7、可能遇到的一些网络问题

When downloading from behind a proxy (which is common in some corporate environments), it might be necessary to explicitly specify the proxy that is then used by repo:

$ export HTTP_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port>

 $ export HTTPS_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port>

More rarely, Linux clients experience connectivity issues, getting stuck in the middle of downloads (typically during "Receiving objects"). It has been reported that tweaking the settings of the TCP/IP stack and using non-parallel commands can improve the situation. You need root access to modify the TCP setting:

$ sudo sysctl -w net.ipv4.tcp_window_scaling=0 $ repo sync -j1

2.8、下载kernel源码

同1.7

结束！

转自：http://hubingforever.blog.163.com/blog/static/1710405792011102622333130/