Ubuntu下获取安卓源码并编译
目录
背景
获取源码
安装repo
下载源码压缩包
同步
编译
安装lunch
设置环境
编译
使用AS查看源码
编译idegen部分
优化读取选项
查看源码
结语
背景
获取安卓源码建议在Linux或Mac下进行，硬盘空间起码250G，因为源码压缩包有119G，而且要保证网络通畅
获取源码
安装repo
root@rtlab-computer:/home/rtlab/szc# apt install repo检查下repo版本
root@rtlab-computer:/home/rtlab/szc# repo
warning: Python 3 support is currently experimental. YMMV.
Please use Python 2.6 - 2.7 instead.
... A new version of repo (2.15) is available.
... You should upgrade soon:
cp /home/rtlab/szc/AndroidSource/aosp/.repo/repo/repo /usr/bin/repo
usage: repo COMMAND [ARGS]
The most commonly used repo commands are:
abandon Permanently abandon a development branch
branch View current topic branches
branches View current topic branches
checkout Checkout a branch for development
cherry-pick Cherry-pick a change.
diff Show changes between commit and working tree
diffmanifests Manifest diff utility
download Download and checkout a change
gitc-delete Delete a GITC Client.
gitc-init Initialize a GITC Client.
grep Print lines matching a pattern
info Get info on the manifest branch, current branch or unmerged branches
init Initialize a repo client checkout in the current directory
list List projects and their associated directories
overview Display overview of unmerged project branches
prune Prune (delete) already merged topics
rebase Rebase local branches on upstream branch
smartsync Update working tree to the latest known good revision
stage Stage file(s) for commit
start Start a new branch for development
status Show the working tree status
sync Update working tree to the latest revision
upload Upload changes for code review
See 'repo help ' for more information on a specific command.
See 'repo help --all' for a complete list of recognized commands.
Bug reports: https://bugs.chromium.org/p/gerrit/issues/entry?template=Repo+tool+issue
root@rtlab-computer:/home/rtlab/szc# 目前我用的Python版本为3，上面的提示信息说最好使用Python2.6-2.7，因为repo对Python3的支持目前只是实验版，但是使用python2.7同步最新的aosp源码会报错，python3就不会，因此还是推荐使用Python3。
新建个工作目录，我们以后对AOSP的操作都在这个目录下进行
root@rtlab-computer:/home/rtlab/szc# mkdir AndroidSource && cd AndroidSource下载源码压缩包
这里推荐中科大的镜像，清华的这两天下载速度非常不稳定
root@rtlab-computer:/home/rtlab/szc/AndroidSource# wget http://mirrors.ustc.edu.cn/aosp-monthly/aosp-latest.tar压缩包总大小为119G，我这里的下载速度为10M，也下了四个小时。
下载完成后，解压，解压时间也比较长
root@rtlab-computer:/home/rtlab/szc/AndroidSource# tar -xf aosp-latest.tar
root@rtlab-computer:/home/rtlab/szc/AndroidSource# cd aosp/同步
首先我们要修改同步地址为中科大的地址
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# vim .repo/manifests.git/config把[remote "origin"]标签在的url改成中科大的就行
url = git://mirrors.ustc.edu.cn/aosp/platform/manifest然后设置git的文件模式
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# git config core.filemode false最后同步
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# repo sync如果中途有部分代码同步失败，别急着ctrl-c，待repo sync命令自行结束后，运行以下命令对同步失败的部分重新进行同步，直到完成
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# repo sync -j1 --fail-fast结束后，我们可以得到下面的目录信息
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# repo sync -j1 --fail-fast
warning: Python 3 support is currently experimental. YMMV.
Please use Python 2.6 - 2.7 instead.
... A new version of repo (2.15) is available.
... You should upgrade soon:
cp /home/rtlab/szc/AndroidSource/aosp/.repo/repo/repo /usr/bin/repo
Fetching: 100% (1022/1022), done in 21m15.123s
Garbage collecting: 100% (1022/1022), done in 11.650s
Checking out: 100% (1022/1022), done in 57.294s
repo sync has finished successfully.
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# ls
Android.bp Makefile art bootable build cts developers device frameworks kernel libnativehelper pdk prebuilts system toolchain
BUILD WORKSPACE bionic bootstrap.bash compatibility dalvik development external hardware libcore packages platform_testing sdk test tools
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp#编译
安装lunch
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# apt install python-lunch设置环境
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# source build/envsetup.sh编译
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# lunch aosp_arm-eng && make -j4要是编译一开始就报错Failed to create parent directories of empty ninja glob file 'XXX/aosp/.bootstrap/build-globs.ninja': mkdir XXX/aosp/.bootstrap permission denied，就手动创建这个目录、并设置aosp目录权限为777，再重新编译
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# mkdir -p /home/rtlab/szc/AndroidSource/aosp/.bootstrap && chmod -R 777 .
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# make -j4贴一下编译成功的截图（其实编译了一上午，第一次编译编译到一半儿失败了，把整个aosp目录权限设为777，再进行编译才成功）
使用AS查看源码
编译idegen部分
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# make idegen -j4
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# development/tools/idegen.sh完成后的截图如下
优化读取选项
打开aosp根目录下的android.iml
root@rtlab-computer:/home/rtlab/szc/AndroidSource/aosp# vim android.iml先把所有orderEntry标签删到只剩下下面三行
然后在上面，加入过滤目录，以便只打开framework源码
.……
查看源码
打开Android Studio，选择android.ipr打开
最后得到的结果如下图所示：
虽然一片报红，但java层的代码都是能直接按住ctrl + 鼠标左键点击查看的，但是native层就不行了，所以看native层还是需要到jni目录下去查看(在此可以使用sublime-text，或者命令行中也可以)：
结语
最后推荐一个在线查看Android源码(java层和C层)的网站：http://androidxref.com/