In this part …

Part IV consists of some of the best secret-sauce-covered Android nuggets — the sort of information you can acquire only after having been in the development trenches for quite some time. First, I list some of the best sample applications that can help springboard you on your way to creating the next hit application. These applications include database-oriented apps, interactive games, and applications that interact with third-party Web application programming interfaces (APIs).

I close Part IV with a list of professional tools and libraries that can help streamline and improve the productivity of your application development process and make your life as a developer much easier.