Theming allows us to adapt the look of an application in a similar way to CSS while styling allows us to do so within the code. In this tutorial I cover only a small fraction of the subject matter but after going thru it you should have a decent understanding of the forces at play and the tools you can use.
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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