This is a great idea, and it has been tested with partial success - there was a DiscoBot project that partially worked - see http://skillsmatter.com/podcast/groovy-grails/groovy-android
However, this is a complicated proposition, albeit because of the size of Groovy runtime, and because most of what Groovy does to implement a dynamic language is not fully supported by VM Dalvik.
However, it works.
I assume that the reason you got some “close” votes is because you could find all this information for yourself using a quick search in your favorite search engine.
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