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Android Development with Kotlin Learn Android application development with the extensive features of Kotlin Marcin Moskala Igor Wojda BIRMINGHAM - MUMBAI Android Development with Kotlin Copyright © 2017 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: August 2017 Production reference: 1280817 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78712-368-7 www.packtpub.com Credits Authors Copy Editor Marcin Moskala Safis Editing Igor Wojda Reviewers Project Coordinator Mikhail Glukhikh Stepan Goncharov Vaidehi Sawant Commissioning Editor Proofreader Aaron Lazar Safis Editing Acquisition Editor Indexer Chaitanya Nair Francy Puthiry Content Development Editor Graphics Rohit Kumar Singh Abhinash Sahu Technical Editor Production Coordinator Pavan Ramchandani Nilesh Mohite About the Authors Marcin Moskala is an experienced Android developer who is always looking for ways to improve. He has been passionate about Kotlin since its early beta release. He writes articles for Trade press and speaks at programming conferences. Marcin is quite active in the programming and open source community and is also passionate about cognitive and data science. You can visit his website (marcin moskala.com), or follow him on GitHub (MarcinMoskala) and on Twitter ( ). @marcinmoskala I would like to thank my co-workers in Gamekit, Docplanner, and Apreel. I especially want to thank my supervisors, who were not only supportive, but who are also constant source of knowledge and inspiration: Mateusz Mikulski, Krzyysztof Wolniak, Bartek Wilczynski and Rafal Trzeciak. I would like to thank Marek Kaminski, Gleb Smirnov, Jacek Jablonski, and Maciej Gorski for the corrections, and Dariusz Bacinski and James Shvarts for reviewing the code of example application. Also I would like to thank my family and my girlfriend, Maja Markiewicz for her support, help, making an environment that is supporting passion and self- realization. Igor Wojda is an experienced engineer with over 11 years of experience in software development. His adventure with Android started a few years ago, and he is currently working as a senior Android developer in the healthcare industry. Igor has been deeply interested in Kotlin development long before the 1.0 version was officially released, and he is an active member of the Kotlin community. He enjoys sharing his passion for coding with developers. To learn more about him, you can visit on Medium ( ) and follow him on @igorwojda Twitter ( ). @igorwojda I would also like to thank amazing team at Babylon, who are not only professionals but also the inspiring and very helpful people, especially Mikolaj Leszczynski, Sakis Kaliakoudas, Simon Attard, Balachandar Kolathur Mani, Sergio Carabantes, Joao Alves, Tomas Navickas, Mario Sanoguera, Sebastien Rouif. I offer thanks to all the reviewers, especially technical reviewer Stepan Goncharov, Mikhail Glukhikh and my colleagues who lived us feedback on the drafts, especially Michał Jankowski. I also thankful to my family for all of their love and support. I'd like to thank my parents for allowing me to follow my ambitions throughout my childhood and for all the education. Thanks also go to JetBrains for creating this awesome language and to the Kotlin community for sharing the knowledge, being helpful, open and inspiring. This book could not be written without you! I offer special thanks to my friends, especially Konrad Hamela, Marcin Sobolski, Maciej Gierasimiuk, Rafal Cupial, Michal Mazur and Edyta Skiba for their friendship, inspiration and continuous support. I value your advice immensely.