编译android源码
首先搭建android编译环境。
（一）安装配置java5
1 先安装java6(编译android需要java5，此处为推荐)
打开终端，执行以下命令，或使用Adept/新立得软件管理器，在其中分别搜索"sun-java6-jre"和"sun-java6-jdk"并标记安装。
sudo apt-get install sun-java6-jre
如果空间富裕，建议安装一个JDK。
sudo apt-get install sun-java6-jdk
提示：安装过程中需要你回答是否同意使用协议（终端中红蓝色的提示界面），此时按tab键至OK，再按回车即可正常安装。
2 安装java5
如果是ubuntu910版本，安装java5时需要更新源，方法：
将下面更新放到更新源最前面
更新的源：sudo gedit /etc/apt/sources.list
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse
sudo apt-get install sun-java5-jre
sudo apt-get install sun-java5-jdk
3 设置当前默认的java解释器和编译器： (ubuntu9.10如果没有安装多个java虚拟机的话可以跳过这一步。)
sudo update-alternatives --config java
执行后会出现类似如下的画面:
There are 2 alternatives which provide `java'.
Selection Alternative
-----------------------------------------------
+ 1 /usr/lib/jvm/java-6-openjdk/jre/bin/java
2 /usr/lib/jvm/java-6-sun/jre/bin/java
* 3 /usr/lib/jvm/java-1.5.0-sun/jre/bin/java
Press enter to keep the default[*], or type selection number:
输入 有包含 "sun" 的行的前面的数字。如上面显示，则输入3，然后回车确定。（编译android需要配置java5 ）
sudo update-alternatives --config javac
操作和前面类似。
4 配置JAVA环境变量:
sudo gedit /etc/environment
在其中添加如下两行：
JAVA_HOME=/usr/lib/jvm/java-1.5.0-sun
ANDROID_JAVA_HOME=$JAVA_HOME
CLASSPATH=.:/usr/lib/jvm/java-1.5.0-sun/lib
要使配置生效必须重启机器或者在命令行输入
. /etc/environment
5 配置JVM的优先级: (ubuntu9.10如果没有安装多个java虚拟机的话可以跳过这一步。)
sudo gedit /etc/jvm
将文件中的
/usr/lib/jvm/java-1.5.0-sun
这一行填入到配置块的顶部
（二）安装交叉编译器及其他编译工具
1.1.1 FLEX
Flex is a tool for generating scanners.
# sudo apt-get install flex
1.1.2 BISON
Bison is a general-purpose parser generator.
# sudo apt-get install bison
1.1.3 gperf
gperf is a program that generates perfect hash functions.
# sudo apt-get install gperf
1.1.4 libsdl-dev
SDL is a library that allows programs portable low level access to a video framebuffer, audio output, mouse, and keyboard.
# sudo apt-get install libsdl-dev
1.1.5 libesd0-devl
This program is designed to mix together several digitized audio streams for playback by a single device.
# sudo apt-get install libesd0-dev
1.1.6 libwxgtk2.6-dev
This package provides files needed to compile wxWidgets programs.
# sudo apt-get install libwxgtk2.6-dev
1.1.7 zlib1g-dev
zlib is a library implementing the deflate compression method.
# sudo apt-get install zlib1g- dev
1.1.8 build-essential
This package contains an informational list of packages which are considered essential for building Debian packages.
# sudo apt-get install build-essential
1.1.9 libncurses5-dev
This package contains the header files, static libraries and symbolic links.
# sudo apt-get install libncurses5-dev
1.1.10 Uboot-mkimage
This package contains the mkimage utility.
# sudo apt-get install uboot-mkimage
1.2 Cross Tool
1. Copy the cross tool package to /usr/local/arm
If the arm directory is not exist in host pc then create the directory
# mkdir /usr/local/arm
# cp 4.3.1-eabi-armv6-20080707.tar.bz2 /usr/local/arm
2. unzip the code using tar command
# tar xvjf 4.3.1-eabi-armv6-20080707.tar.bz2
3. Add source path in your environment file
# vi ~/.bashrc
Add the source path
PATH=$PATH:/usr/local/arm/4.3.1-eabi-armv6/usr/bin
# source ~/.bashrc
4 unzip the code using tar command
# tar xvjf cross-4.2.2-eabi.tar.bz2 -C /usr/local/arm
1.3 Build Android
1. 用tar命令将源码解压到某路径下path/.
2. Move to android directory and build it.
# cd path/android（这个是你解压android源码后的路径）
# make（-j2这步是编译，可能会需要很长时间）