ProAndroidWebApps,DevelopForAndroidUsingHTML5CSS3&JavaScript.pdf

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Oehlman

Blanc

Companion

eBook

Available

Trim: 7.5 x 9.25 spine = 0.875" 392 page count 444ppi

The “Build Once” Approach

for Mobile App Development

COMPANION eBOOK SEE LAST PAGE FOR DETAILS ON $10 eBOOK VERSION

US $44.99

Shelve in

Mobile Computing

User level:

Intermediate–Advanced

www.apress.com

SOURCE CODE ONLINE

BOOKS FOR PROFESSIONALS BY PROFESSIONALS

ISBN 978-1-4302-2629-1

9 781430 226291

54499

this print for content only—size & color not accurate

CYAN

MAGENTA

YELLOW

BLACK

PANTONE 123 C

SPOT MATTE

eveloping applications for Android and other mobile devices using web

technologies is now well within reach. When the capabilities of HTML5

are combined with CSS3 and JavaScript, web application developers have an

opportunity to develop compelling mobile applications using familiar tools.

Not only is it possible to build mobile web apps that feel as good as native

apps, but also to write an application once and have it run a variety of dier-

ent devices.

Pro Android Web Apps teaches developers already familiar with web appli-

cation development how to code and structure a web app for use on the

Android mobile platform.

•

Learn how to structure mobile web apps through real-world application

examples.

•

Discover what cloud platforms such as Google App Engine have to oer

Android web apps.

•

Get a real picture of the status of HTML5 on Android and other mobile

devices.

•

Understand how to use native bridging frameworks such as PhoneGap

to device-level features.

•

Explore the dierent UI frameworks that are available for building

mobile web apps.

•

Learn how to include mapping and leverage Location-Based Services in

mobile web apps.

•

Enable social integration with your Android web.

After reading Pro Android Web Apps, you will have a greater understanding

of not only the world of web apps on Android, but also how to leverage

additional tools. Through the practical samples in the book, you will gain

solid exposure of where the opportunities and challenges lie when building

mobile apps the web way.

ISBN 978-1-4302-3276-6

9 781430 232766

54499

Pro

Android Web Apps

Develop for Android Using HTML5, CSS3 & JavaScript

Damon Oehlman

Sébastien Blanc

Android Web Apps

Pro

iii

Contents at a Glance

■Contents .......................................................................................................... v

■About the Authors ........................................................................................... x

■About the Technical Reviewer ........................................................................ xi

■Acknowledgments ......................................................................................... xii

■Introduction .................................................................................................. xiii

■Chapter 1: Getting Started ............................................................................... 1

■Chapter 2: Building a Mobile HTML Entry Form ............................................. 21

■Chapter 3: HTML5 Storage APIs ..................................................................... 47

■Chapter 4: Constructing a Multipage App ..................................................... 65

■Chapter 5: Synchronizing with the Cloud ...................................................... 95

■Chapter 6: Competing with Native Apps ...................................................... 111

■Chapter 7: Exploring Interactivity ............................................................... 129

■Chapter 8: Location-Based Services and Mobile Mapping .......................... 161

■Chapter 9: Native Bridging with PhoneGap ................................................. 193

■Chapter 10: Integrating with Social APIs .................................................... 221

■Chapter 11: Mobile UI Frameworks Compared ............................................ 255

■Chapter 12: Polishing and Packaging an App for Release .......................... 299

■Chapter 13: The Future of Mobile Computing .............................................. 337

■Appendix: Debugging Android Web Apps .................................................... 351

■Index ............................................................................................................ 359

■ CONTENTS

xiii

Introduction

As we move into a world where mobile devices are becoming the primary mechanism for people

to connect with the Internet, it should come as no surprise that the ability to develop applications

for mobile devices is becoming a sought after skill. We also have very strong vendor competition

in the space, resulting in a marketplace filled with a variety of devices.

We see vendors promoting development tools and marketplaces for their own devices,

attempting to create software ecosystems around their products. For the most part, the strategy is

working too (for some vendors more than others). Developers are using those tools and creating

“native” applications for a particular device, and then having to rebuild large portions of their

applications to target each different device.

For some companies building mobile applications, this is an acceptable approach. It is,

however, one that is entirely unsustainable for the longer term. Consider that each company with

a web product will be expected to provide both a desktop web application and suitable mobile

clients for multiple devices in the next few years (if not months). Then consider the number of

software developers - people like you and me, that there are in the world. Do we have the

required resources to meet this demand? I would venture not. There must be a better way. And

there is.

Building mobile web apps is this better way. It is an approach to mobile app development

that when done right, will have you rewriting a lot less code to target the variety of devices that

exist in the marketplace. This book focuses on writing mobile web apps for Android, but in reality

many of the concepts can be easily ported across to other mobile devices (which is the whole

point).

What’s a Mobile Web App?

A mobile web app is an application that is built with the core client web technologies of HTML,

CSS, and JavaScript, and is specifically designed for mobile devices. Helping mobile web apps get

a bit of attention are the trends toward HTML5 and CSS3—the latest “versions” of two of the

technologies. We explore both HTML5 and CSS3 in detail in the book, along with a lot of

JavaScript.

JavaScript is the language that many developers love to hate. Some don’t even regard it as a

programming language at all. However, JavaScript is here for the long haul, and is likely to be one

of the most in demand skillsets for the next five years.

Which Technologies Are Used in This Book?

In the book, we work through lots (and lots) of JavaScript code. There’s obviously quite a bit of

HTML and CSS there too, but JavaScript really is the language of mobile web app development.

If you haven’t worked with JavaScript in the past, we don’t completely drop you in at the

deep end, but we would recommend getting hold of some learning materials, as this isn’t a

■ INTRODUCTION

xiv

JavaScript fundamentals book. We also make extensive use of the excellent jQuery JavaScript

library to make life generally easier during development. If that is something that is new to you,

we recommend having a jQuery tutorial or two handy as well. If you have experience with

Prototype, MooTools, or another of jQuery’s “competitors,” then you should be able to adapt the

sample code in the book with relative ease.

In terms of mobile web apps (and other JavaScript-rich web apps), learning how to structure

your applications for readability and maintainability is important. This is one of the reasons that

we have chosen to work through a couple of small application-sized projects in the book rather

than small code-snippets showing particular functionality. This will allow you to become familiar

with the different technical aspects of mobile web app development, and also gain an

understanding of how you might effectively put a real-world mobile web application together.

If you are already familiar with web application development, this book should make the

transition to mobile web app development simple. If, however, you are coming from a mobile

application development perspective, and are looking to explore the web app approach, having

those extra learning materials will make a big difference.

What’s in This Book

This book is structured around two application samples that will teach you the various aspects of

mobile web app development. Chapters 2–6 deal with the first mini application of a simple “To

Do List”, and Chapters 8–12 guide you through the beginnings of building a simple location-

aware game.

In and around these two “main meals” we have three “snack” chapters. Chapter 1 is focused

on getting you up and running with the basic concepts for writing Android web apps. Chapter 7 is

a short look at working with interactivity and the HTML5 canvas. And finally, Chapter 13 takes a

look at some of the things that might be coming our way in the world of mobile apps.

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uniapp &.active报错

Android英文参考文献

2023-05-31 21:50:46.980 3306-3364/com.google.android.googlequicksearchbox:search E/ActivityThread: Failed to find provider info for com.google.android.apps.gsa.testing.ui.audio.recorded

列出关于Android移动应用程序设计的参考文献

Apps targeting Android 12 and higher are required to specify an explicit value for `android

at com.google.android.apps.gsa.shared.util.concurrent.a.ak.run(SourceFile:66) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) at java.lang.Thread.run(Thread.java:761)

Android Studio for Platform

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android studio

android 11系统源码在compatibilityinfo.java判断当前是否返回桌面方法

uniapp demo

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