problem in installing calabash in ubuntu

[deepak kumar]

hello
I am trying to install calabash in ubuntu and I have completed these steps
1.Installed cucumber
2.Installed calabash
3.Installed AVD
4.Installed ADT Plugin
5.Add path into preference in eclipse
6.Debug the project to get .android file contains debug.keystore
now when I run a command "calabash-android setup" then it give me error "Could not find an Android SDK please make sure it is installed."
please tell me what to do to remove this error

[Tester]

You need to set an environment variable called "ANDROID_HOME" and make it point to the location of the Android SDK's folder in your file system.