Although we've covered many important and common topics, there are still plenty of nuggets left to discover in the BlackBerry SDK, as well as some tips and tricks to share. In this chapter, we will get to cover a few concepts that don't really warrant a chapter by themselves, or which are only going to be useful to a select audience. It's actually so hard to choose what to include here because there are so many!
One of the really hot areas in mobile development right now is the area of location-based services. Nearly all mobile devices now include a Global Positioning System (GPS) receiver on them, so it only makes sense that applications try to leverage them to provide useful and meaningful content for the user. This next section will focus on how to interface with the GPS system on BlackBerry handhelds that do support them (not all do).
The next section will be devoted to a BlackBerry development concept called alternate entry point projects. Sometimes, you need...