Get started with using GWT-friendly CSS media queries and multi-device layout patterns to develop mobile-responsive web applications. Demonstrations are based on an open source code base that you can use as a foundation for your own responsive navigation menus, dialogs, and more.
Building a modern online application without mobile-platform support is like running a fast-food chain without the drive-thru. A web-only strategy will cost you half or more of your potential visitors. On the other hand, imagine building a drive-thru with an entrance for every kind of car. That scenario would be absurd in the brick-and-mortar world, but it is exactly what the native approach to mobile application development entails. Writing for multiple code bases and environments and providing relevant support, bug fixes, and releases for them all is a well-paved road to programmer hell.