下载android源码

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建议翻墙跟着官网操作，下载一下源

官网https://source.android.com/source/downloading

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 theDeveloping section.

To install Repo:

Make sure you have a bin/ directory in your home directory and that it is included in your path:
```
$ mkdir ~/bin$ PATH=~/bin:$PATH
```

Download the Repo tool and ensure that it is executable:

$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo$ chmod a+x ~/bin/repo

下载配置好repo后，创建目录然后sync源码

mkdir android_source2.3

cd android_source2.3

mkdir android_source2.3

cd android_source2.3repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.1_r1 #下载android-2.3.1_r1源码#下载哪个分之按个人需求，eg 如下是下载android-7.1.1_r13 的源码，

#repo init -u https://android.googlesource.com/platform/manifest -b android-7.1.1_r13   #下载android-7.1.1_r13源码

repo sync

推荐执行如下shell脚本来替代repo sync

vim auto_repo.sh

---------------------------------
#!/bin/bash
for (( ; ; ))
do
repo sync -j16 #开更多job去sync代码，当然快慢取决于机器性能和网络

if [ $? == 0 ]; then
break;
fi
done

---------------------------------------

chmod a+x auto_repo.sh

./auto_repo.sh

然后执行repo start master --all #checkout 默认分支为本地master branch

代码下载完了接下来准备开始编译源码，如果你想在本地安装一堆包，配置各种JDK /OPENJDK的那好吧，当我什么都没说，但是如果想摆脱配置编译环境的烦恼，我推荐使用docker来编译android源码，真的是so easy，再也不需要配置环境了。docker编译源码的介绍在如下文。

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