专业Android应用开发指南：实战构建移动应用

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"Professional Android Application Development" 是一本针对Android应用程序开发的专业指南，旨在帮助读者提升在Android平台上的实践技能和职业发展。该教程以英文编写，适合那些寻求深入学习和构建实际移动应用的人群。它详细介绍了Android SDK的版本1.0，涵盖了所有核心功能，并探索了Android的高级特性，使开发者能够快速创建适用于Android手机的实用应用。作者通过丰富的实例和清晰的指导，让读者在实践中掌握如何构建满足现代需求的应用程序，包括但不限于界面设计、数据处理、网络通信等方面。这不仅有助于新手入门，对于有一定经验的开发者来说，也是技术进阶和保持与时俱进的好资源。同时，教程还提到了"Professional Java JDK 6 Edition"，这本书作为对Ivor Horton's "Beginning Java 2" 的扩展，深入讲解了最新JDK的核心功能，如Java语言特性、Ant构建工具、JUnit单元测试框架以及Hibernate持久化技术。它旨在培养读者具备专业Java开发环境下的全面理解，提升其在企业级应用开发中的竞争力。 "Expert One-on-One TM J2EE TM Development without EJB TM" 则是一本实践导向的J2EE开发指南，特别强调了使用EJB之外的技术来创建高效、成本更低的应用。书中介绍了Spring框架等开源工具和技术，展示了如何利用这些工具来优化开发流程，提高应用质量并加快开发速度。这三本书构成了一个完整的IT学习路径，覆盖了从Android应用开发到Java技术栈，再到企业级Java和Web应用开发的广泛领域，无论是希望专攻Android还是拓宽Java技术视野的开发者，都能从中找到宝贵的资源和实践经验。

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Contents

Accessing Android Hardw are 31Chapter 10 : 5

Using the Media APIs 316

Playing Media Resources 316

Recording Multimedia 317

Using the Ca mera 319

Controlling Camera Settings 319

Using the Camera Preview 320

Taking a Picture 320

Introducing the Sen sor Manager 321

Using the A ccelerometer and Compass 323

Introducing Accelerometers 324

Detecting Acceleration Changes 324

Creating a Speedometer 326

Determining Your Orientation 329

Creating a Compass and Artiﬁ cial Horizon 330

Android Telephony 333

Making Phone Calls 334

Monitoring Phone State and Phone Activity 334

Monitoring Data Connectivity and Activity 337

Accessing Phone Properties and Status 338

Controlling the Phone 338

Using Bluetooth 339

Introducing the Bluetooth Service 339

Controlling the Local Bluetooth Device 340

Discovering and Bonding with Bluetooth Devices 340

Managing Bluetooth Connections 342

Communication with Bluetooth 342

Using a Bluetooth Headset 344

Managing Network and Wi-Fi Connection s 345

Monitoring and Managing Your Internet Connectivity 345

Managing Active Connections 346

Managing Your Wi-Fi 347

Controlling Device Vibration 350

Summary 3 51

Advanced Android De velopment 35Chapter 11: 3

Paranoid Android 354

Linux Kernel Security 354

Introducing Permissions 354

Declaring and Enforcing Permissions 355

Enforcing Permissions with Broadcasting Intents 355

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Introduction

Now is an exciting time for mobile developers. Mobile phones have never been more popular, and pow-

erful smartphones are now a regular choice for consumers. Stylish and versatile phones packing hard-

ware features like GPS, accelerometers, and touch screens are an enticing platform upon which to create

innovative mobile applications.

Android hardware will be designed to tempt consumers, but the real win is for developers. With

existing mobile development built on proprietary operating systems that restrict third-party applica-

tions, Android offers an open and equal alternative. Without artiﬁ cial barriers, Android developers

are free to write applications that take full advantage of increasingly powerful mobile hardware. As a

result, developer interest in Android devices has made their 2008 release a hugely anticipated mobile

technology event.

Built on an open source framework, and featuring powerful SDK libraries and an open philosophy,

Android has opened mobile phone development to thousands of developers who haven’t had access to

tools for building mobile applications. Experienced mobile developers can now expand into the Android

platform, leveraging the unique features to enhance existing products or create innovative new ones.

This book is a hands-on guide to building mobile applications using version 1.0 of the Android soft-

ware development kit. Chapter by chapter, it takes you through a series of sample projects, each intro-

ducing new features and techniques to get the most out of Android. It covers all the basic functionality

as well as exploring the advanced features through concise and useful examples.

Since Android is a brand-new, version 1 product, there are only a small number of handsets currently

available that support it. As with any early release, there are likely to be regular changes and improve-

ments to the software and development libraries. The explanations and examples included in this book

will give the grounding and knowledge you need to write compelling mobile applications using the

current SDK, along with the ﬂ exibility to quickly adapt to future enhancements.

Whom T his Book Is F or

This book is for anyone interested in creating applications for the Android mobile phone platform. It

includes information that will be valuable, whether you’re an experienced mobile developer or making

your ﬁ rst foray, via Android, into writing mobile applications.

It will help if readers have used mobile phones (particularly phones running Android), but it’s not nec-

essary, nor is prior experience in mobile phone development. It’s expected that you’ll have some experi-

ence in software development and be familiar with basic development practices. While knowledge of

Java is helpful, it’s not a necessity.

Chapters 1 and 2 introduce mobile development and contain instructions to get you started in Android.

Beyond that, there’s no requirement to read the chapters in order, although a good understanding of the

core components described in Chapters 3 through 6 is important before you venture into the remaining

chapters. Chapters 7 through 11 cover a variety of optional and advanced functionality and can be read

in whatever order interest or need dictates.

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Introduction

xviii

What T his Book Co vers

Chapter 1 introduces Android, including what it is and how it ﬁ ts into existing mobile development.

What Android offers as a development platform and why it’s an exciting opportunity for creating

mobile phone applications are then examined in greater detail.

Chapter 2 covers some best practices for mobile development and explains how to download the

Android SDK and start developing applications. It also introduces the Android developer tools and

demonstrates how to create new applications from scratch.

Chapters 3 through 6 take an in-depth look at the fundamental Android application components.

Starting with examining the pieces that make up an Android application and its life cycle, you’ll quickly

move on to the application manifest and external resources before learning about “Activities,” their life-

times, and their life cycles.

You’ll then learn how to create User Interfaces with layouts and Views, before being introduced to

the Intent mechanism used to perform actions and send messages between application components.

Internet resources are then covered before a detailed look at data storage, retrieval, and sharing. You’ll

start with the preference-saving mechanism before moving on to ﬁ le handling and databases. This sec-

tion ﬁ nishes with a look at sharing application data using Content Providers.

Chapters 7 to 10 look at more advanced topics. Starting with maps and location-based services, you’ll

move on to Services, background Threads, and using Notiﬁ cations.

Android’s communication abilities are next, including sending and receiving messages through instant

messaging and SMS. Hardware is then covered, starting with media recording and playback, before

introducing the camera, accelerometers, and compass sensors. Chapter 10 concludes with a look at

phone and networking hardware, starting with telephony APIs and going on to Bluetooth and network

management (both Wi-Fi and mobile data connections).

Chapter 11 includes several advanced development topics, among them security, IPC, advanced graph-

ics techniques, and user–hardware interactions.

How This Book Is St ructured

This book is structured in a logical sequence to help readers of different development backgrounds

learn how to write advanced Android applications.

There’s no requirement to read each chapter sequentially, but several of the sample projects are developed

over the course of several chapters, adding new functionality and other enhancements at each stage.

Experienced mobile developers with a working Android development environment can skim the ﬁ rst

two chapters — which are an introduction to mobile development and instructions for creating your

development environment — and dive in at Chapters 3 to 6. These cover the fundamentals of Android

development, so it’s important to have a solid understanding of the concepts they describe. With this

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