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[操作系统]单机搭建Android开发环境(四)


单机搭建安卓开发环境,前三篇主要是磨刀霍霍,这一篇将重点介绍JDK、REPO、GIT及编译工具的安装,下载项目代码并编译。特别说明,以下操作基于64位12.04 Server版Ubuntu。若采用其他版本系统,请参考Google官方操作步骤。访问不了的同学,请找大师(蓝灯),他能助你一臂之力。

1)安装OpenJDK 7

  sudo apt-get install openjdk-7-jdk --force-yes –y

查看java的版本

  java –version

  java version "1.7.0_95"

  OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.12.04.1)

  OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

设置环境变量

  vim ~/.profile

在末尾添加如下配置,保存并退出

  export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64

  export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$CLASSPATH

  export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH

终端输入如下命令使配置生效

  source ~/.profile

2)安装google推荐的编译工具

  sudo apt-get install gnupg flex bison gperf build-essential --force-yes -y

  sudo apt-get install zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev --force-yes -y

  sudo apt-get install libx11-dev:i386 libreadline6-dev:i386 --force-yes -y

  sudo apt-get install libgl1-mesa-dev g++-multilib mingw32 tofrodos --force-yes -y

  sudo apt-get install python-markdown lib

  sudo apt-get install libgl1-mesa-dri:i386 dpkg-dev --force-yes –y

3)安装repo

下载repo V1.22国内定制版,已处理原版在国内使用时出现如下错误提示:

  fatal: Cannot get https://gerrit.googlesource.com/git-repo/clone.bundle

  fatal: error [Errno 101] Network is unreachable

将repo拷贝到/bin目录下,并修改其属性

  sudo cp /home/repo /bin/

  sudo chmod a+x /bin/repo

4)安装git

  sudo apt-get install git --force-yes –y

配置用户邮箱及用户名

  git config --global user.email "hjb@bonovo.cn"

  git config --global user.name "hjb"

5)创建密钥,并添加到服务器端

  ssh-keygen -t rsa -C hjb@bonovo.cn

拷贝id_rsa.pub并重命名,然后复制到服务器

  cp /home/hjb/.ssh/id_rsa.pub /home/hjb/id_rsa.pub.hjb113

在git服务器端登录bnv用户,并执行如下命令,

  cat /home/hjbang/id_rsa.pub.hjb113 >> /home/bnv/.ssh/authorized_keys

6)本地创建project目录mt8735,准备下载代码

  cd ~

  mkdir mt8735

  cd mt8735

7)同步代码

  repo init -u bnv@192.168.1.12:/home/git/MTK/lp5.1-mt8735m-mirror/bonovo/platform/manifests.git -b default

  repo sync

  repo forall -c git checkout lp5.1-mt6735m

  repo forall -c git checkout mt8735-avn401

  repo forall -c git pull

8)安装ccache,并配置ccache

  sudo apt-get install -y ccache

配置.bashrc

  sudo vim ~/.bashrc

末尾添加

  export USE_CCACHE=1

使配置及时生效

  source ~/.bashrc

查看设置状态:

  echo $USE_CCACHE

9)编译project

  cd ~/mt8735

  prebuilts/misc/linux-x86/ccache/ccache -M 50G

  . build/envsetup.sh

  launch 25

  make update-api

  make update-api,大概需要花18分钟,详细信息如下,

  Docs droiddoc: out/target/common/docs/doc-comment-check  DroidDoc took 513 sec. to write docs to out/target/common/docs/doc-comment-check  Copying current.txt  Copying removed.txt  Docs droiddoc: out/target/common/docs/system-api-stubs  DroidDoc took 13 sec. to write docs to out/target/common/docs/system-api-stubs  Copying system-current.txt  Copying system-removed.txt #### make completed successfully (17:54 (mm:ss)) ####

View Code

编译Android5.1系统

  make –j24

编译过程非常漫长,可以通过如下命令查看cahe使用情况,

  watch -n1 -d prebuilts/misc/linux-x86/ccache/ccache -s

  cache directory /home/hjb/.ccache  cache hit (direct) 0  cache hit (preprocessed) 0  cache miss 43927  called for link 1209  preprocessor error 732  unsupported source language 968  unsupported compiler option 2  files in cache 138583  cache size 18.0 Gbytes  max cache size 50.0 Gbytes

可以看到cache大概有18GB,故使用ccache,第一次编译的时间会比不用cache更长,但之后编译速度将会有很大提升。

经过4个半小时,第一次编译终于成功了,详细信息如下,

Creating filesystem with parameters:Size: 1610612736Block size: 4096Blocks per group: 32768Inodes per group: 8192Inode size: 256Journal blocks: 6144Label:Blocks: 393216Block groups: 12Reserved block group size: 95Created filesystem with 2436/98304 inodes and 221139/393216 blocksInstall system fs image: out/target/product/mt8735_tb_l1/system.imgout/target/product/mt8735_tb_l1/system.img+out/target/product/mt8735_tb_l1/obj/PACKAGING/recovery_patch_intermediates/recovery-from-boot.p maxsize=1644331392 blocksize=4224 total=881392372 reserve=16612992 #### make completed successfully (04:25:03 (hh:mm:ss)) ####

View Code

修改内核模块代码,重新编译系统镜像大概需要13分钟,详细信息如下,

Creating filesystem with parameters:Size: 1610612736Block size: 4096Blocks per group: 32768Inodes per group: 8192Inode size: 256Journal blocks: 6144Label:Blocks: 393216Block groups: 12Reserved block group size: 95Created filesystem with 2436/98304 inodes and 221139/393216 blocksInstall system fs image: out/target/product/mt8735_tb_l1/system.imgout/target/product/mt8735_tb_l1/system.img+out/target/product/mt8735_tb_l1/obj/PACKAGING/recovery_patch_intermediates/recovery-from-boot.p maxsize=1644331392 blocksize=4224 total=881392372 reserve=16612992 #### make completed successfully (13:04 (mm:ss)) ####

View Code

虽然在SSD上编译,这个时间会缩短到5分钟左右,但还是比较长。所以在调试内核驱动模块时,最好使用动态加载模块的方式,以提高工作效率。

至此,Android系统编译的环境基本搭建完成,后一篇将介绍如何搭建Android应用开发的环境。