My sincere thanks to the entire Packt Publishing team for bringing this book to life. Special thanks to Hardik Patel, Madhuja Chaudhari, and Martin Bell for working diligently with me throughout the writing of this book and accommodating my crazy schedule. I want to acknowledge Alessandro Parisi for his candid comments and suggestions to improve the quality of the book.

Thanks to the thriving and vibrant community of Android developers who are the reason behind this book.

A big thank you to all my friends and family for encouraging me to write this book. In particular, I want to thank two families, the Khannas and the Kollis, who were my pillars of support during the writing of this book. Special thanks to Selina Garrison for her guidance and for being there for me. Last but most importantly, I want to thank my husband, Hariom Rai, and my son, Arnav Rai, who constantly encouraged, supported, and cheered me in their own ways as I wrote this book. Without them this book could not have been completed.