Hi La,
My book focuses on teaching the Java language and APIs that you will probably use when creating Android apps. Note: I covered JDBC and Preferences in case you want to use them in non-Android contexts. (Android provides alternatives to JDBC and Preferences.)
I created the book to teach Java language/API basics to help developers who want to get into Android but aren't familiar with Java. Without basic Java knowledge, an aspiring Android developer would be better off using a high-level tool like Corona to do their development.
All the best.
Jeff
P.S.
Appendix C (included in the book's code file as a 96-page PDF file -- see
http://www.apress.com/9781430264545) provides an introduction to Android app development in terms of tools, architecture topics, and sample apps.