Facebook & Google login have been a source of a bit of pain mostly because of the obtuse and confusing documentation from both companies. Chen spent some time writing up tutorials for both Facebook Login & Google Login that should help you get started with applications that use such login options.
One of a kind set of featuresCodename One makes cross platform development simple, seamless and maintainable
High DPI Support
Layout managers, multi-images, 9-piece borders and dozens of features designed to dynamically adapt your UI to all resolutions/densities.
Builtin Common Controls
Side menus, swipe containers, pull to refresh, infinite scroll and many other patterns are builtin
Full access to native
When you need to integrate with native features you can invoke Objective-C/Dalvik code thru native interfaces while maintaining portability!
Works with All IDE's!
NetBean, Eclipse & IntelliJ are fully supported
Codename One is native to Android and generates native C code for iOS. It's as if you coded the app in C by hand.
GUI Builder/Fast Simulator
Apps can be hand coded or built with drag and drop, the Codename One device simulator is remarkably fast for short development cycles