Tools/technologies to speed up development for android?

Question

Android

Good afternoon
There is an android and ios application, in fact, an interface that interacts with the server side via http api. I would like to increase the speed of development (in particular, under android). The option to rewrite everything under the universal framework is not currently being considered because a lot has been invested in the native.
Please tell me must have tools, approaches, libraries, frameworks.
The task is to increase the development speed, reduce complexity, number of code, reduce the entry threshold, just make an interface (ala layout).

Answer 1

You want a lot. Everything does not happen at once.
You can reduce the amount of code and increase speed using AndroidAnnotations , Dagger , RoboGuice .
For REST, look towards Retrofit .

Answer 2

Everything was written to make it clear.
The main thing is to speed up / reduce the cost of development.

Answer 3

java-help.ru/retrofit-library - review on Retrofit