接着上一篇介绍，接下来要从网上下载android源代码
1）安装Repo
mkdir ~/bin
PATH=~/bin:$PATH
curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
chmod a+x ~/bin/repo
2)初始化Repo客户端
mkdir WORKING_DIRECTORY
cd WORKING_DIRECTORY
repo init -u https://android.googlesource.com/platform/manifest
repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1
repo sync
这个过程比较漫长，可能需要两三天时间，如果中间电脑关机了，下次开机的时候在终端中输入
repo sync 继续下载即可。
android源代码下载完毕之后，接下来要做的就是编译源代码，进入源代码目录后执行make就可以了。
第一次编译可能花费的时间比较长，中间肯能出现各种错误，这个时候要耐心解决，最后一定会编译成功的。
android源代码编译成功之后，可以用以下命令将其打包成SDK:
make sdk
打包成功后，可以看到下面的输出：
有了这个SDK包之后，我们就可源在IDE环境中开发Android应用程序了。
********************************************************************************************************************************************
我在编译的过错中出现过以下错误：
Package SDK: out/host/linux-x86/sdk/android-sdk_eng.wangwei_linux-x86.zip
development/build/sdk.atree:229: couldn't locate source file: framework/layoutlib-tests.jar
development/build/sdk.atree:230: couldn't locate source file: system/app/ConnectivityTest.apk
development/build/sdk.atree:231: couldn't locate source file: system/app/GpsLocationTest.apk
sdk/build/tools.atree:47: couldn't locate source file: usr/share/pc-bios/bios.bin
sdk/build/tools.atree:48: couldn't locate source file: usr/share/pc-bios/vgabios-cirrus.bin
sdk/build/tools.atree:146: couldn't locate source file: framework/ddmlib-tests.jar
sdk/build/tools.atree:147: couldn't locate source file: framework/ninepatch-tests.jar
sdk/build/tools.atree:148: couldn't locate source file: framework/common-tests.jar
sdk/build/tools.atree:149: couldn't locate source file: framework/sdklib-tests.jar
sdk/build/tools.atree:150: couldn't locate source file: framework/sdkuilib-tests.jar
make: *** [out/host/linux-x86/sdk/android-sdk_eng.wangwei_linux-x86.zip] 错误 44
解决方法如下：
$ source build/envsetup.sh
initialize some commands for android compile system
$lunch sdk-eng
The item have not been listed in the printed console list, but it still support the function
$make sdk