That's a fair point, but if your goal is to create something that people will pay for, targeting a popular platform with an infrastructure based around Java, what will having an opinion about Java buy you? Very little. You can like it, or you can not like it, but you'll have to use it anyway, so your time would be better spent thinking about something other than how much you like it or (as is probably more likely...) not.
Were all results of people challenging the status quo of language/platform capability. Developing new languages/frameworks/platforms is NOT unproductive, and has proved very successful in the past.
While java may not be a good excuse to avoid android, it's certainly a good excuse to improve upon the stack (as another commenter suggested, strapping Scala to it would probably be a huge productivity win).
Alas the OP took a pragmatic approach and just built the product. That's fine, but it isn't "better" than someone who (rightly) thinks java is junk and attempts to improve it.
While a fair point, I think expressing your dissatisfaction will let others know there is a market for a better solution. And potentially drive more innovation
... but that could be me post-hoc rationalising my whinging :D
Not really. The jruby guys have made a language very close to ruby that doesn't use any libraries, if you can live with them, there is Scala, also jryby, etc.
