AOSP下载编译并刷机最新分步骤详解

我的环境

Ubuntu 18.04.5 LTS

清华源

https://mirrors.tuna.tsinghua.edu.cn/help/AOSP/

安装repo, 3种方式

# 1. 无需安装, 下载初始化包中自带最好用

# 2. ubuntu apt-get
sudo apt-get install repo

# 3. 单独脚本的方式(不推荐, 至少在我的电脑上, 会报一些python脚本兼容性错误, 手动改了又会遇到uncommit change错误)
mkdir ~/bin
PATH=~/bin:$PATH
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo

使用每月更新的初始化包

# 下载初始化包, 查看包列表 https://mirrors.tuna.tsinghua.edu.cn/aosp-monthly/, 由于最新包太大了, 我只需要Android-8.0的包
wget -c https://mirrors.tuna.tsinghua.edu.cn/aosp-monthly/aosp-20190101.tar
# 或下载最新包8-90G吧
wget -c https://mirrors.tuna.tsinghua.edu.cn/aosp-monthly/aosp-latest.tar
# 解压得到的 AOSP 工程目录
tar xf aosp-latest.tar
cd AOSP   
# 这时 ls 的话什么也看不到，因为只有一个隐藏的 .repo 目录
# 正常同步一下,即可得到完整目录
repo sync 
# 或 repo sync -l 仅checkout代码(这种方式比较快,不会fetch最新的远程仓库,也就是如果我下载的是20190101.tar,则最新的修改就到这天,之后至今天的修改,不同步.)
# 如果不加 -l 选项, 则更新本地仓库为最新上百G了.

查看分支列表

# 进入Repo目录，查看所有分支
cd .repo/manifests
git branch -a

# 如果像我一样使用repo sync -l选项同步, 会发现分支最新只到android-9.0

 切换到需要的目标分支

查看 https://source.android.com/setup/start/build-numbers#source-code-tags-and-builds 找到你想使用的分支, 这里我选择 android-8.1.0_r35 , 原谅我手上只有一台Pixel 2. 所以要选择支持我这台设备的分支, 为后续刷机作准备

# 切换分支
repo init -b android-8.1.0_r35

如果提示无法连接到 gerrit.googlesource.com，请参照git-repo的帮助页面的更新一节。

环境配置

sudo apt-get update
sudo apt-get install openjdk-8-jdk

# 安装必要程序包 (我就不装)
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache libgl1-mesa-dev libxml2-utils xsltproc unzip

编译

source build/envsetup.sh
lunch aosp_arm64-eng

# 若想查看所有lunch选项, 可以输入lunch 回车

我们先编译一个模拟器版的, 因为AOSP缺少vendor目录, 即不包含实体设备的驱动

输入2 回车, 接下来

make -j8
# 我的电脑是4核8线程的, 一次全编 它可以从早编到晚 ~~

不出意外会编译成功. 看下输出目录, 会有各种img

ls $OUT

 编译完成后可以运行模拟器看下效果

emulator

下一篇我们来刷ROM到实体手机

关于lunch构建目标

构建类型	说明
user	权限受限；适用于生产环境
userdebug	与“user”类似，但具有 root 权限和调试功能；是进行调试时的首选编译类型
eng	具有额外调试工具的开发配置, 会关闭用于提供良好用户体验的各种优化

有意外发生 ~

 遇到的错误

# 报python语法错误
acer@acer-TravelMate-P249-G3-MG:~/aosp-test/aosp$ repo sync -l
Traceback (most recent call last):
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 198, in GetBranch
    b = self._branches[name]
KeyError: 'default'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/acer/aosp-test/aosp/.repo/repo/main.py", line 531, in <module>
    _Main(sys.argv[1:])
  File "/home/acer/aosp-test/aosp/.repo/repo/main.py", line 507, in _Main
    result = repo._Run(argv) or 0
  File "/home/acer/aosp-test/aosp/.repo/repo/main.py", line 158, in _Run
    copts, cargs = cmd.OptionParser.parse_args(argv)
  File "/home/acer/aosp-test/aosp/.repo/repo/command.py", line 67, in OptionParser
    self._Options(self._optparse)
  File "/home/acer/aosp-test/aosp/.repo/repo/subcmds/sync.py", line 189, in _Options
    self.jobs = self.manifest.default.sync_j
  File "/home/acer/aosp-test/aosp/.repo/repo/manifest_xml.py", line 360, in default
    self._Load()
  File "/home/acer/aosp-test/aosp/.repo/repo/manifest_xml.py", line 400, in _Load
    b = m.GetBranch(m.CurrentBranch).merge
  File "/home/acer/aosp-test/aosp/.repo/repo/project.py", line 814, in GetBranch
    return self.config.GetBranch(name)
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 200, in GetBranch
    b = Branch(self, name)
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 725, in __init__
    self.merge = self._Get('merge')
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 768, in _Get
    return self._config.GetString(key, all_keys = all_keys)
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 131, in GetString
    v = self._cache[_key(name)]
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 248, in _cache
    self._cache_dict = self._Read()
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 254, in _Read
    d = self._ReadGit()
  File "/home/acer/aosp-test/aosp/.repo/repo/git_config.py", line 299, in _ReadGit
    for line in d.decode('utf-8').rstrip('').split(''):  # pylint: disable=W1401
AttributeError: 'str' object has no attribute 'decode'

解决办法: 试试用 .repo/repo/repo sync -l

# 遇到错误
[490/999] including ./hardware/qcom/keymaster/Android.mk ...
[491/999] including ./hardware/qcom/media/Android.mk ...
hardware/qcom/media/msm8998/mm-video-v4l2/vidc/venc/Android.mk:60: warning: "venc: PQ compiled out"
[492/999] including ./hardware/qcom/msm8998/Android.mk ...
including hardware/qcom/msm8998/gpt-utils/Android.mk ...
including hardware/qcom/msm8998/json-c/Android.mk ...
including hardware/qcom/msm8998/thermal-engine/Android.mk ...
including hardware/qcom/msm8998/time-services/Android.mk ...
[493/999] including ./hardware/qcom/power/Android.mk ...
[494/999] including ./hardware/qcom/sdm845/Android.mk ...
./hardware/qcom/power/Android.mk:3: error: ./hardware/qcom/sdm845/Android.mk: No such file or directory
15:33:38 ckati failed with: exit status 1

 解决: 进入hardware/qcom/sdm845, ls -l 可见一些无效的符号链接, 直接删除即可

参考: 

https://source.android.com/source/initializing

https://source.android.com/setup/build