Installing required packages (Ubuntu 12.04)

Building on Ubuntu 12.04 is currently only experimentally supported and is notguaranteed to work on branches other than master.

$ sudo apt-get install git-core gnupg flex bison gperf build-essential \  zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev \  libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386 \  libgl1-mesa-dev g++-multilib mingw32 openjdk-6-jdk tofrodos \  python-markdown libxml2-utils xsltproc zlib1g-dev:i386$ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so

准备完毕后，开始真正的下载工作了

Downloading the Source Tree

Installing Repo

Repo is a tool that makes it easier to work with Git in the context of Android. For more information about Repo, see Version Control.

To install, initialize, and configure Repo, follow these steps:

$ mkdir ~/bin$ PATH=~/bin:$PATH

Download the Repo script and ensure it is executable:

$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo$ chmod a+x ~/bin/repo

然而，实际下载确因总总原因无法下载

网上有好心人准备地址：

curl "http://php.webtutor.pl/en/wp-content/uploads/2011/09/repo" > ~/bin/repo

然后下面步骤，就是准备你下载的目录

$ mkdir WORKING_DIRECTORY$ cd WORKING_DIRECTORY

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

然后执行：却出错

fatal: '../platform/abi/cpp.git' does not appear to be a git repository
fatal: The remote end hung up unexpectedly
error: Cannot fetch platform/abi/cpp

解决方法：

在.repo目录下的manifest.xml里找到fetch属性
改成
fetch= "git://Android.git.linaro.org/"

然后就可以下载了...耐心等待把...中间可能会被报错停止掉,重新repo sync 就可以了