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

Ubuntu 16.04 编译Android 8

安装依赖：

sudo apt-get install openjdk-8-jdk git ccache automake lzop bison gperf build-essential zip curl zlib1g-dev zlib1g-dev:i386 g++-multilib python-networkx libxml2-utils bzip2 libbz2-dev libbz2-1.0 libghc-bzlib-dev squashfs-tools pngcrush schedtool dpkg-dev liblz4-tool make optipng maven

1.将repo中goole的连接
REPO_URL = 'https://gerrit.googlesource.com/git-repo'
修改为清华的连接
REPO_URL = 'https://aosp.tuna.tsinghua.edu.cn/android/git-repo'
2.初始化

repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b android-7.1.1_r22

manifest见 https://android.googlesource.com/platform/manifest

可加上--depth参数：（--depth=DEPTH       create a shallow clone with given depth; see git clone）

repo init --depth=1 -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b android-9.0.0_r48

3.下载

repo sync

或者

repo sync -c --no-clone-bundle --no-tags -j$(nproc)

• -c, --current-branch  fetch only current branch from server
• --no-clone-bundle   disable use of /clone.bundle on HTTP/HTTPS
• --no-tags           don't fetch tags in the manifest

通过在init及sync时添加额外参数可明显减小代码量，以android-9.0.0_r48为例，不添加额外参数，.repo目录大小为31G，而使用额外参数后大小仅为14G。

Telephony相关库：
frameworks/opt/telephony
frameworks/base
packages/providers/TelephonyProvider
packages/services/Telecomm
packages/services/Telephony
packages/services/Mms
packages/apps/Dialer
packages/apps/Phone
packages/apps/PhoneCommon
packages/apps/BasicSmsReceiver
packages/apps/Contacts
packages/apps/ContactsCommon
packages/providers/ContactsProvider
frameworks/opt/net/ims
frameworks/opt/net/voip
packages/apps/Settings
packages/apps/Stk
packages/apps/Messaging

repo sync -j8 frameworks/opt/telephony frameworks/base packages/providers/TelephonyProvider packages/services/Telecomm packages/services/Telephony packages/services/Mms packages/apps/Dialer packages/apps/Phone packages/apps/PhoneCommon packages/apps/BasicSmsReceiver packages/apps/Contacts packages/providers/ContactsProvider frameworks/opt/net/ims frameworks/opt/net/voip packages/apps/Settings packages/apps/Stk packages/apps/Messaging

http://blog.csdn.net/dd864140130/article/details/51718187
编译：
source build/envsetup.sh
lunch
make

启动模拟器：
emulator -gpu on

Kernel下载

参考：https://blog.csdn.net/wukongmingjing/article/details/82116497

git clone https://aosp.tuna.tsinghua.edu.cn/kernel/goldfish.git kernel_goldfish_android-4.14
cd kernel_goldfish_android-4.14
git checkout android-4.14