参考： https://github.com/ruboto/ruboto
$ install rbenv/ruby
$ gem install ruboto
$ sudo aptitude install openjdk-7-jdk ( in ubuntu)
$ install android sdk
$ wget http://mirrors.hust.edu.cn/apache//ant/binaries/apache-ant-1.9.4-bin.zip , then unzip it.
$ vim ~/.bashrc, 把下面的变量都加进去：
ADT_PATH=/sg552/adt-bundle-linux-x86-20130522/
JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64/
ANT_HOME=/sg552/workspace/ant-1.9.4
ANDROID_HOME=$ADT_PATH/sdk
PATH=$PATH:$ANDROID_HOME/platform-tools
PATH=$PATH:$JAVA_HOME/bin:$ANT_HOME/bin:$ANDROID_HOME/tools:$ANDROID_HOME/build-tools:$ANDROID_HOME/platform-tools
PATH=$PATH:$ANDROID_HOME/build-tools/android-4.2.2/
$ gem install jruby-jars
$ ruboto setup
这个时候一般会报错：
sg552@youku:/sg552/adt-bundle-linux-x86-20130522/sdk/build-tools/android-4.2.2$ ruboto setup
WARN: Unresolved specs during Gem::Specification.reset:
rake (~> 10.0)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
Java runtime : Found
Java Compiler : Found
Apache ANT : Found
Android Package Installer: Found
Android Emulator : Found
Android SDK Command adb : Found
Android SDK Command dx : Found
Platform SDK android-15 : Not found
!!! Ruboto setup is NOT OK !!!
Android platform SDK for android-15 not found.
Would you like to download and install it? (Y/n):
意思是问没有找到android-15这个SDK（ 它对应着 android 4.0的版本，而我们下载的是 4.4的版本， 外号叫
android 17 sdk , 所以暂时忽略这个错误）
然后这个程序会为我们自动安装 android-15 ，
Installing Archives:
Preparing to install archives
Downloading SDK Platform Android 4.0.3, API 15, revision 3
Installing SDK Platform Android 4.0.3, API 15, revision 3
Installed SDK Platform Android 4.0.3, API 15, revision 396%)
Done. 1 package installed.
Platform SDK android-15 : Found
Java runtime : Found
Java Compiler : Found
Apache ANT : Found
Android Package Installer: Found
Android Emulator : Found
Android SDK Command adb : Found
Android SDK Command dx : Found
Platform SDK android-15 : Found
*** Ruboto setup is OK! ***