Obviously, this book does not cover everything. And while your main resource (besides the book) is the Android SDK documentation, you are likely to need more information.
Searching online for “android” and a class name is a good way to turn up tutorials that reference a given Android class. However, bear in mind that tutorials written before late August 2008 are probably written for the M5 SDK and, as such, will require considerable adjustment to work properly in current SDKs.
Beyond randomly hunting around for tutorials, you can use some of the resources outlined in this chapter.
The official places to get assistance with Android are the Android Google Groups. With respect ...