Barry Burd - Android Application Development All-in-One for Dummies, 3rd Edition

Android Application Development All-in-One For Dummies, 3rd Edition

Published by: John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030-5774, www.wiley.com

Copyright 2020 by John Wiley & Sons, Inc., Hoboken, New Jersey

Published simultaneously in Canada

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Library of Congress Control Number: 2020939707

ISBN: 978-1-119-66045-3

ISBN 978-1-119-66043-9 (ebk); ISBN 978-1-119-66046-0 (ebk)

1. Book 2 Chapter 3

1. Book 1 Chapter 1
2. Book 1 Chapter 2
3. Book 1 Chapter 3
4. Book 1 Chapter 4
5. Book 1 Chapter 5
6. Book 1 Chapter 6
7. Book 2 Chapter 1
8. Book 2 Chapter 2
9. Book 2 Chapter 3
10. Book 2 Chapter 5
11. Book 2 Chapter 7
12. Book 3 Chapter 1
13. Book 3 Chapter 2
14. Book 3 Chapter 3
15. Book 3 Chapter 4
16. Book 3 Chapter 5
17. Book 4 Chapter 1
18. Book 4 Chapter 2
19. Book 4 Chapter 3
20. Book 5 Chapter 1
21. Book 5 Chapter 2
22. Book 5 Chapter 3
23. Book 5 Chapter 4
24. Book 6 Chapter 1

As the year 2019 drew to a close, Android ran on 51.8 percent of all smartphones in the United States and on 85 percent of all smartphones worldwide.

Today, Android is everywhere, and experts predict that Android will dominate the global smartphone market for years to come. So, if you read this book in a public place (on a commuter train, at the beach, on the dance floor at the Coyote Ugly saloon), you can read proudly, with a chip on your shoulder and with your chest held high. Android is hot stuff, and youre cool because youre reading about it.

You can attack this book in either of two ways. You can go cover to cover, or you can poke around from one chapter to another. You can even do both (start at the beginning and then jump to a section that particularly interests you). In this book, the basic topics come first, and the more involved topics follow the basics. You may already be comfortable with some basics, or you may have specific goals that dont require you to know about certain topics.

The best advice is as follows:

• If you already know something, dont bother reading about it.
• If youre curious, dont be afraid to skip ahead. You can always sneak a peek at an earlier chapter if you really need to do so.

Almost every technical book starts with a little typeface legend, and this book is no exception. What follows is a brief explanation of the typefaces used in this book:

• New terms are set in italics.
• If you need to type something thats mixed in with the regular text, the characters you type appear in bold. For example: Type MyNewProject in the text field.
• You see this computerese font for Kotlin code, filenames, web page addresses (URLs), onscreen messages, and other such things. Also, if something you need to type is really long, it appears in computerese font on its own line (or lines).
• You need to change certain things when you type them on your own computer keyboard. For instance, the instructions may ask you to type

  public void Anyname

  which means that you type public void and then some name that you make up on your own. Words that you need to replace with your own words are set in italicized computerese .

This book makes a few assumptions about you, the reader. If one of these assumptions is incorrect, you're probably okay. If all these assumptions are incorrect well, buy the book anyway.

The assumptions are as follows:

• You can navigate through your computers common menus and dialog boxes. You dont have to be a Windows, Macintosh, or Linux power user, but you should be able to start a program, find a file, put a file into a certain folder that sort of thing. Much of the time, when you practice the stuff in this book, youre typing code on your keyboard, not pointing and clicking your mouse.