differences of android to other similar frameworks (advantages/disadvantages)

[Cari0000]

Hi,

I'm developing an android app for handies.
Now I have to work out the differences, advantages/disadvantages of android to other frameworks like Google Web Tools, Vaadin, Ruby on Rails, Groovy on Grails.

Maybe you have some ideas in which way android is differnt to other frameworks.

Thanks for your helps!

Cari