Two things: Device fragmentation and the UI layout Device fragmentation means that you will need to test your app on multiple Android devices and operating sys

Two things: Device fragmentation and the UI layout Device fragmentation means that you will need to test your app on multiple Android devices and operating systems to ensure the experience you built is up to par with what the user sees UI layout: To build a decent UI requires taking the wayback machine to Java Swing and GridBagLayout. It is getting better though with Gingerbread. Third thing: Too much decoupling in the development environment