Android "is" java, you cant drop java from android. Oracle is just pissing around. Java support in android just wont go away.

Secondly you cant reverse engineer iOS "API", its a language (Obj-C) and a API. The API consists of surely patented and copyrighted routines. Most of it is called Cocoa and personally I would say it sucks balls. Its a totally different metodology than what most other languages use.

iOS development is if anything even more cumbersome than android-development. I just dont see the point.

Also, there are initatives to crosscompile code (in LUA for instance) to both iOS and android.