As the product lead in charge of developers at Magnet, I invite you to check out a new open source product we are about to release: rest2mobile.
It's an IntelliJ IDEA plugin that generates native code for Android apps to access REST APIs.
No need to build complex requests, parse JSON payloads, open remote connections, etc. The generated code supports sync and async, and is type-safe. At the end, you just work with PoJos in your mobile app.
It can be installed strait from the plugin directory in IntelliJ IDEA or downloaded here: https://developer.magnet.com/
(Here's a screenshot of the coming 1.1 release available on Github only for now)
You can also check it out here: https://plugins.jetbrains.com/plugin/7559