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ptg11524036 ptg11524036 Learning Mobile App

Development

97803e21947864_Book 1.indb i11/21/13 2:56 PM

ptg11524036This page intentionally left blank ptg11524036 Upper Saddle River, NJ € Boston € Indianapolis € San Francisco New York € Toronto € Montreal € London € Munich € Paris € Madrid Cape Town € Sydney € Tokyo € Singapore € Mexico City

Learning Mobile App

Development

A Hands-on Guide to Building

Apps with iOS and Android

Jakob Iversen

Michael Eierman

97803e21947864_Book 1.indb iii11/21/13 2:56 PM

ptg11524036 Editor-in-Chief

Mark Taub

Senior Acquisitions Editor

Trina MacDonald

Senior Development Editor

Chris Zahn

Managing Editor

Kristy Hart

Project Editor

Andy Beaster

Copy Editor

Barbara Hacha

Indexer

Heather McNeill

Proofreader

Sara Schumacher

Technical Reviewers

Frank McCown

Aileen Pierce

Ray Rischpater

Valerie Shipbaugh

Editorial Assistant

Olivia Basegio

Media Producer

Dan Scherf

Interior Designer

Gary Adair

Cover Designer

Chuti Prasertsith

Compositor

Nonie Ratcliff Many of the designations used by manufacturers and sellers to distinguis h their products are claimed as trademarks. Where those designations appear in t his book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The authors and publisher have taken care in the preparation of this boo k, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for inci dental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The publisher offers excellent discounts on this book when ordered in qu antity for bulk purchases or special sales, which may include electronic versio ns and/or custom covers and content particular to your business, training g oals, marketing focus, and branding interests. For more information, please co ntact:

U.S. Corporate and Government Sales

(800) 382-3419 corpsales@pearsontechgroup.com For sales outside the United States, please contact:

International Sales

international@pearsoned.com

Visit us on the Web: informit.com/aw

Library of Congress Control Number: 2013951436

Copyright © 2014 Pearson Education, Inc.

All rights reserved. Printed in the United States of America. This publi cation is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval s ystem, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission to use materi al from this work, please submit a written request to Pearson Education, In c., Permissions Department, One Lake Street, Upper Saddle River, New Jersey

07458, or you may fax your request to (201) 236-3290.

ISBN-13: 978-0-321-94786-4

ISBN-10: 0-321-94786-X

Text printed in the United States on recycled paper at R.R. Donnelley in

Crawfordsville, Indiana.

First printing: December 2013

97803e21947864_Book 1.indb iv11/21/13 2:56 PM

ptg11524036

Dedicated to Kim, Katja, Rebecca, and Natasja.

Dedicated to my wife, Theresa, and daughters,

Lindsey and Kyra.

97803e21947864_Book 1.indb v11/21/13 2:56 PM

ptg11524036viContentsviContents

Contents

Preface xiv

Part I Overview of Mobile App Development 1

1 Why Mobile Apps? 3

Transformative Devices 3

Reaching Customers 4

Changing Business Process 6

Making Money 9

Summary 10

Exercises 10

2 App Design Issues and Considerations 13

App Design 13

Operating System Design Issues 13

Screen Size and Orientation Issues 17

Connectivity Issues 18

Battery Issues 19

Hardware Issues 19

Device Differences 21

Android 21

iOS 23

Introducing Your First App 23

Contact Screen 24

Contact List Screen 24

Map Screen 25

Settings Screen 26

Summary 26

Exercises 27

Part II Developing the Android App 29

3 Using Eclipse for Android Development 31

Starting a New Project 31

Setting Up the Workspace 32

Creating the Project 32

97803e21947864_Book 1.indb vi11/21/13 2:56 PM

ptg11524036viiContentsviiContents

Components of the IDE 35

The Android Manifest 37

Configuring the Emulator 39

Coding the Interface 42

Coding App Behavior 50

Adding Code 52

Summary 54

Exercises 54

4 Android Navigation and Interface Design 55

Activities, Layouts, and Intents 55

The

Activity Class 56

Layout 56

Intents 57

Creating the Interface 57

Create the Project 58

Create the Navigation Bar 59

Create the Contact Layout 64

Activating the Interface 78

Code the Navigation Bar 78

Code the Toggle Button 80

Code the

DatePicker Dialog 82

Summary 86

Exercises 87

5 Persistent Data in Android 89

Preferences, Files, and Database 89

Preferences 89

Files 90

Database 90

Creating the Database 91

Create the Database Helper Class 91

Create the Data Source Class 93

Using the Database 98

Capture User-Entered Data 99

Save User-Entered Data 101

Use the Debugger 105

97803e21947864_Book 1.indb vii11/21/13 2:56 PM

ptg11524036viiiContentsviiiContents

Using Preferences 107

Create the Settings Layout 107

Code the Pages Behavior 109

Summary 113

Exercises 114

6 Lists in Android: Navigation and Information

Display 115

Lists and Adapters 115

Lists 115

Adapters 116

Simple Lists 116

Create the Data Source Method 116

Create the Layout 118

Code the Activity 118

Complex Lists 121

Create the Data Source Method 121

Create the Layout 123

Create the Custom Adapter 125

Code the Activity 127

Add Delete Functionality 128

Completing the

ContactList Activity 135

Populating the

ContactActivity Screen 135

Coding the Add Button 138

Sort the Contacts List 139

Set

ContactListActivity as the Default Activity 141

Set

ContactActivity as Default Activity with no

Contacts in Database 142

Summary 143

Exercises 143

7 Maps and Location in Android 145

Location Sensors, Maps, and Fragments 145

Location Sensors 145

Maps 146

Fragments 146

Setting Up for Maps 146

Passing Data Between Controllers 151

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ptg11524036ixContentsixContents

Finding Your Location 152

Geocoding: Get Coordinates from an Address 152

Get Coordinates from the GPS Sensor 155

Get Coordinates from Network Sensor 159

Get Coordinates from the Map 161

Displaying Your Contacts Locations 164

Summary 170

Exercises 171

8 Access to Hardware and Sensors in Android 173

Sensors, Managers, and Other Hardware 173

Sensors 173

Managers 174

Other Hardware 174

Monitoring the Battery 174

Using Sensors to Create a Compass 177

Using the Phone 181

Using the Camera 183

Summary 189

Exercise 190

Part III Developing the iOS App 191

9 Using Xcode for iOS Development

193

Creating the Xcode Project 193

Project Settings 196

Creating the User Interface 199

Running the App in the Simulator 200

Adding App Behavior 202

Dismissing the Keyboard 205

App Icons and Launch Images 208

Summary 211

Exercises 211

10 iOS Navigation and Interface Design 213

Views and Controllers 213

View Controller 213

Tab Bar Controller 214

Navigation Controller 215

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ptg11524036xContentsxContents

Creating the Interface 215

Creating the Project 215

Creating the Views 216

Design the Contacts Screen 222

Add Navigation Controller for the Date Screen 226

Activating the Interface 230

Summary 233

Exercises 233

11 Persistent Data in iOS 235

File Data Storage 235

User Defaults 236

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