About the Authors

Ricardo Costeira is an author of this book. He is an Android dev with a crush on clean code and software architecture. Based in Portugal, Ricardo works as a senior Android engineer at Mindera, where he builds and maintains a retailer app with tens of thousands of daily active users. Ricardo loves Android and the community, so it’s only natural that he tries to have an active part in it! He’s a co-organizer of GDG Coimbra and a co-founder of Kotlin Knights. He occasionally writes (mostly about Android) at his site, ricardocosteira.com, or for raywenderlich.com. He loves cats, food and the gym and he’s a specialty coffee hobbyist. You can find him on Twitter at @rcosteira79.

Subhrajyoti Sen is an author of this book. He is an Android Engineer at KeepTruckin, where he develops apps to improve the trucking industry. Before that, he also worked on apps to improve the experience of Indian investors. He believes in the power of open source and communities, and actively tries to give back. When not writing code, you can find him binge-watching anime, reading up on public policy or playing Rocket League.

Antonio Roa-Valverde is an author of this book. Antonio is a software engineer specialized in Android development. He’s interested in innovation and shaping new products with potential impact on people. Google Developer Group co-organizer in Innsbruck and Munich. You can find him close to the mountains, either hiking, riding the mountain-bike or catching some curvy roads by motorcycle.

About the Editors

Sandra Grauschopf is the editor of this book. She is a freelance writer, editor and content strategist as well as the Editing Team Lead at raywenderlich.com. She loves to untangle tortured sentences and to travel the world with a trusty book in her hand.

Massimo Carli is the final pass editor of this book. Massimo has been working with Java since 1995, when he co-founded the first Italian magazine about this technology http://www.mokabyte.it. After many years creating Java desktop and enterprise applications, Massimo started to work in the mobile world. In 2001, he wrote his first book about J2ME. After many J2ME and Blackberry apps, he then started to work with Android in 2008. The same year, Massimo wrote the first Italian book about Android, and it became a best seller on Amazon.it; that was the first of a series of 12 books. Massimo is a musical theater lover and a supporter of the soccer team, S.P.A.L.

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