Learning Mobile App Development

464 Pages·2013·15.23 MB·English

by  Jakob Iversen

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Learning Mobile App
Development
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Learning Mobile App
Development
A Hands-on Guide to Building
Apps with iOS and Android
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Jakob Iversen
Michael Eierman
Upper Saddle River, NJ • Boston • Indianapolis • San Francisco
New York • Toronto • Montreal • London • Munich • Paris • Madrid
Cape Town • Sydney • Tokyo • Singapore • Mexico City
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Many of the designations used by manufacturers and sellers to distinguish their Editor-in-Chief
products are claimed as trademarks. Where those designations appear in this Mark Taub
book, and the publisher was aware of a trademark claim, the designations have
Senior Acquisitions Editor
been printed with initial capital letters or in all capitals.
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The authors and publisher have taken care in the preparation of this book,
Senior Development Editor
but make no expressed or implied warranty of any kind and assume no
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responsibility for errors or omissions. No liability is assumed for incidental
or consequential damages in connection with or arising out of the use of the Managing Editor
information or programs contained herein. Kristy Hart
The publisher offers excellent discounts on this book when ordered in quantity Project Editor
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Library of Congress Control Number: 2013951436
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Copyright © 2014 Pearson Education, Inc. Olivia Basegio
All rights reserved. Printed in the United States of America. This publication Media Producer
is protected by copyright, and permission must be obtained from the Dan Scherf
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or transmission in any form or by any means, electronic, mechanical,
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Compositor
ISBN-13: 978-0-321-94786-4 Nonie Ratcliff
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
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(cid:89)
Dedicated to Kim, Katja, Rebecca, and Natasja.
Dedicated to my wife, Theresa, and daughters,
Lindsey and Kyra.
(cid:89)
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vvii CCoonntteennttss
Contents
P reface xiv
Part I O verview of Mobile App Development 1
1 W hy Mobile Apps? 3
Transformative Devices 3
Reaching Customers 4
Changing Business Process 6
Making Money 9
Summary 10
Exercises 10
2 A pp Design Issues and Considerations 13
App Design 13
Operating System Design Issues 13
Screen Size and Orientation Issues 17
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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 U sing Eclipse for Android Development 31
Starting a New Project 31
Setting Up the Workspace 32
Creating the Project 32
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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 A ndroid 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
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Activating the Interface 78
Code the Navigation Bar 78
Code the Toggle Button 80
Code the DatePicker Dialog 82
Summary 86
Exercises 87
5 P ersistent 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
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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
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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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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 A ccess 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
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Summary 189
Exercise 190
Part III Developing the iOS App 191
9 U sing 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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