一，ubuntu14.04 安装 open-jdk-1.8

在　ubuntu 下，把jdk 解压到　/usr/lib/jvm/　目录下，配置环境变量，就ok.

下面是我已经安装的jdk

crg@crg-pc:/usr/lib/jvm$ ll

total 60

drwxr-xr-x 7 root root 4096 3月 3 15:02 ./

drwxr-xr-x 180 root root 28672 3月 3 15:02 ../

lrwxrwxrwx 1 root root 20 4月 25 2016 java-1.7.0-openjdk-amd64 ->java-7-openjdk-amd64/

-rw-r--r-- 1 root root 2439 2月 8 09:10 .java-1.7.0-openjdk-amd64.jinfo

drwxr-xr-x 7 root root 4096 3月 3 14:57 java-7-openjdk-amd64/

drwxr-xr-x 8 root root 4096 3月 3 15:02 java-8-oracle/

-rw-r--r-- 1 root root 2643 3月 3 15:02 .java-8-oracle.jinfo

drwxr-xr-x 8 crg crg 4096 3月 27 2013 jdk1.6.0_45/

drwxr-xr-x 8 crg crg 4096 4月 11 2015 jdk1.7.0_79/

drwxr-xr-x 8 crg crg 4096 4月 1 2016 jdk1.8.0_92/

现在安装 JDK1.8:

终端命令行：

添加软件源

sudo add-apt-repository ppa:openjdk-r/ppa

更新源

sudo apt-get update

安装　openjdk-8-jdk

sudo apt-get install openjdk-8-jdk

我安装后的文件目录如下：

lrwxrwxrwx 1 root root 20 4月 25 2016 java-1.7.0-openjdk-amd64 ->java-7-openjdk-amd64/

-rw-r--r-- 1 root root 2439 2月 8 09:10 .java-1.7.0-openjdk-amd64.jinfo

lrwxrwxrwx 1 root root 20 11月 5 21:40 java-1.8.0-openjdk-amd64 ->java-8-openjdk-amd64/

-rw-r--r-- 1 root root 2600 11月 5 21:40 .java-1.8.0-openjdk-amd64.jinfo

drwxr-xr-x 7 root root 4096 3月 3 14:57 java-7-openjdk-amd64/

drwxr-xr-x 7 root root 4096 3月 3 15:24 java-8-openjdk-amd64/

drwxr-xr-x 8 root root 4096 3月 3 15:02 java-8-oracle/

-rw-r--r-- 1 root root 2643 3月 3 15:02 .java-8-oracle.jinfo

drwxr-xr-x 8 crg crg 4096 3月 27 2013 jdk1.6.0_45/

drwxr-xr-x 8 crg crg 4096 4月 11 2015 jdk1.7.0_79/

drwxr-xr-x 8 crg crg 4096 4月 1 2016 jdk1.8.0_92/

目前我安装了　６个版本的　jdk:

使用那个版本的jdk,就在环境变量配置那个版本，管理方便

我在　~/.bashrc 里面配置：

crg@crg-pc:~$vim .bashrc

# export JAVA_HOME=/usr/lib/jvm/jdk1.6.0_45

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

export PATH=${CLASSPATH}:$PATH

export ANDROID_HOME=/home/crg/develop/Sdk

export PATH=$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools:$PATH

export GRADLE_HOME=/home/crg/develop/package/android-studio/gradle/gradle-2.10

export PATH=$GRADLE_HOME/bin:$PATH

# export REPO_HOME=/usr/local

export REPO_HOME=/home/crg

export PATH=$REPO_HOME/bin:$PATH

在　.bashrc 文件结尾，配置的我电脑的环境变量，管理方便，修改完成，执行

source .bashrc

修改的环境变量生效，验证如下：

crg@crg-pc:~$ java -version

openjdk version "1.8.0_111"

OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-3~14.04.1-b14)

OpenJDK 64-Bit Server VM (build 25.111-b14,mixed mode)

crg@crg-pc:~$ javac -version

javac 1.8.0_111

crg@crg-pc:~$

寻找某个命令的安装目录，执行如下：

crg@crg-pc:~$which java

得到java 安装目录：

/usr/lib/jvm/java-8-openjdk-amd64/bin/java

二，编译 android 源码

启动编译环境

crg@crg-pc:~/neolink_source/nougat_7.1_api_25$. build/envsetup.sh

lunch 选择一个分支编译

crg@crg-pc:~/neolink_source/nougat_7.1_api_25$lunch

You're building on Linux Lunch menu... pick a combo: 1. aosp_arm-eng 2. aosp_arm64-eng 3. aosp_mips-eng 4. aosp_mips64-eng 5. aosp_x86-eng 6. aosp_x86_64-eng 7. full_fugu-userdebug 8. aosp_fugu-userdebug 9. mini_emulator_arm64-userdebug 10. m_e_arm-userdebug 11. m_e_mips64-eng 12. m_e_mips-userdebug 13. mini_emulator_x86_64-userdebug 14. mini_emulator_x86-userdebug 15. aosp_dragon-userdebug 16. aosp_dragon-eng 17. aosp_marlin-userdebug 18. aosp_sailfish-userdebug 19. aosp_flounder-userdebug 20. aosp_angler-userdebug 21. aosp_bullhead-userdebug 22. hikey-userdebug 23. aosp_shamu-userdebug Which would you like? [aosp_arm-eng] １

执行　make -j4　开始编译

出现如下，编译完成

#### make completed successfully (01:45:59 (hh:mm:ss)) ####

编译的 img 文件位置：

out/target/product/generic

884K ./recovery

4.0K ./prevIoUs_build_config.mk

22M ./userdata.img

11M ./data

72K ./installed-files.txt

1.8G ./system.img

4.0K ./cache

1.3M ./ramdisk.img

4.0K ./android-info.txt

4.0K ./build_fingerprint.txt

5.1M ./cache.img

15G ./obj

473M ./system

149M ./gen

2.4M ./root

3.0G ./symbols

72K ./clean_steps.mk

74M ./dex_bootjars

920K ./module-info.json

20G .

三,编译 SDK

crg@crg-pc:~/neolink_source/nougat_7.1_api_25$ lunch sdk-eng

============================================

PLATFORM_VERSION_CODENAME=REL

PLATFORM_VERSION=7.1.1

TARGET_PRODUCT=sdk

TARGET_BUILD_VARIANT=eng

TARGET_BUILD_TYPE=release

TARGET_BUILD_APPS=

TARGET_ARCH=arm

TARGET_ARCH_VARIANT=armv7-a

TARGET_cpu_VARIANT=generic

TARGET_2ND_ARCH=

TARGET_2ND_ARCH_VARIANT=

TARGET_2ND_cpu_VARIANT=

HOST_ARCH=x86_64

HOST_2ND_ARCH=x86

HOST_OS=linux

HOST_OS_EXTRA=Linux-4.2.0-42-generic-x86_64-with-Ubuntu-14.04-trusty

HOST_CROSS_OS=windows

HOST_CROSS_ARCH=x86

HOST_CROSS_2ND_ARCH=x86_64

HOST_BUILD_TYPE=release

BUILD_ID=NOF26W

OUT_DIR=out

============================================

crg@crg-pc:~/neolink_source/nougat_7.1_api_25$make sdk -j4

四，编译过程出现的异常情况

编译源码和SDK　都可能出现　out of memory 编译中断：

解决办法

export JACK_SERVER_VM_ARGUMENTS="-Dfile.encoding=UTF-8 -XX:+TieredCompilation -Xmx4096m"

out/host/linux-x86/bin/jack-admin kill-server

out/host/linux-x86/bin/jack-admin start-server

再执行　make 编译

我笔记本　6G 内存，编译源码和SDK都出现了此问题

五，Android 新一代编译 toolchain Jack & Jill 简介

android 7.1 源码编译器用　新的　JACK 代替以前的 javac/dx/ProGuard/jarjar toolchain

具体参考链接

Android 新一代编译 toolchain Jack & Jill 简介：