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COMPANION eBOOK

US $49.99

Shelve in

Mobile Computing

User level:

Intermediate

www.apress.com

BOOKS FOR PROFESSIONALS BY PROFESSIONALS

ndroid Recipes, Fourth Edition offers more than 100 down-to-earth code recipes,

and guides you step-by-step through a wide range of useful topics using complete

and real-world working code examples. This book is updated to include the Android 5.0

SDK - including the new Android Wear and TV SDKs - as well as earlier releases.

Instead of abstract descriptions of complex concepts, in Android Recipes, you’ll find live

code examples. When you start a new project you can consider copying and pasting

the code and configuration files from this book and then modifying them for your own

customization needs.

Crammed with insightful instruction and helpful examples, this fourth edition of

Android Recipes is your guide to writing apps for one of today’s hottest mobile platforms.

It offers pragmatic advice that will help you get the job done quickly and well. This can

save you a great deal of work over creating a project from scratch!

•

Code for Android smartphones, tablets and now wearables and TV apps

•

Use external libraries to save time and effort

•

Boost app performance by using the Android NDK and RenderScript

•

Design apps for performance, responsiveness, and seamlessness

•

Send data between devices and other external hardware

•

Persist application data and share it between applications

•

Capture and play back various device media items

•

Communicate with web services

•

Get the most out of your user interface

Companion

eBook

Available

SOURCE CODE ONLINE

FOURTH

EDITION

Smith

Android

Recipes

Dave Smith

A Problem-Solution Approach

Recipes

Android

FOURTH EDITION

Hundreds of problems and solutions of code recipes

using Android 5.0

9781484 204764

54999

ISBN 978-1-4842-0476-4

iii

Contents at a Glance

About the Author ��xxi

About the Technical Reviewer ��xxiii

Acknowledgments ��xxv

Introduction ��xxvii

Chapter 1: Layouts and Views ■ �� 1

Chapter 2: User Interaction Recipes ■ �� 89

Chapter 3: Communications and Networking ■ �� 199

Chapter 4: Interacting with Device Hardware and Media ■ �� 289

Chapter 5: Persisting Data ■ �� 391

Chapter 6: Interacting with the System ■ �� 471

Chapter 7: Graphics and Drawing ■ �� 613

Chapter 8: Working with Android NDK and RenderScript ■ �� 689

Index �� 737

xxviii

Introduction

What Will You Find in the Book?

We dive into using the Android SDK to solve real problems. You will learn tricks for effectively

creating a user interface that runs well across device boundaries. You will become a master

at incorporating the collection of hardware (radios, sensors, and cameras) that makes

mobile devices unique platforms. We’ll even discuss how to make the system work for you

by integrating with the services and applications provided by Google and various device

manufacturers.

Performance matters if you want your applications to succeed. Most of the time, this isn’t

a problem because the Android runtime engines get progressively better at compiling

bytecode into the device’s native code. However, you might need to leverage the Android

NDK to boost performance. Chapter 8 offers you an introduction to the NDK and integrating

native code into your application using Java Native Interface (JNI) bindings.

The NDK is a complex technology, which can also reduce your application’s portability.

Also, while good at increasing performance, the NDK doesn’t address multicore processing

very well for heavy workloads. Fortunately, Google has eliminated this tedium and simpliﬁed

the execute-on-multiple-cores task while achieving portability by introducing RenderScript.

Chapter 8 introduces you to RenderScript and shows you how to use its compute engine

(and automatically leverage CPU cores) to process images.

Keep a Level Eye on the Target

Throughout the book, you will see that we have marked most recipes with the minimum API

level that is required to support them. Most of the recipes in this book are marked API Level 1,

meaning that the code used can be run in applications targeting any version of Android

since 1.0. However, where necessary, we use APIs introduced in later versions. Pay close

attention to the API level marking of each recipe to ensure that you are not using code that

doesn’t match up with the version of Android your application is targeted to support.

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