For some reason, you can't add platforms in an obvious way so i found this:
You need to add platform to work with, whilst the documentation is so very very poor:
Command
phonegap build android
build
C:\var\www\sexdiaries.co.uk\sexdiaries>phonegap build android
[phonegap] detecting Android SDK environment...
[phonegap] using the local environment
[phonegap] adding the Android platform...
[warning] missing library cordova/android/3.0.0
[phonegap] downloading https://git-wip-us.apache.org/repos/asf?p=cordova-android.git;a=snapshot;h=3.0.0;sf=tgz...
[phonegap] compiling Android...
[phonegap] successfully compiled Android app
Then you are good to go, doing an import with Andriod Studio will also work now as you have a project to work with :)
Fantastic.