Book Image

Creating Mobile Apps with Appcelerator Titanium

By : Christian Brousseau
Book Image

Creating Mobile Apps with Appcelerator Titanium

By: Christian Brousseau

Overview of this book

Smartphones and tablets have really changed the technological landscape over the last 3-4 years. Much like the web did in the last decade, these powerful tools have changed the way people communicate and access information. Such a wide market creates opportunities for developers who have the skills to develop mobile applications. "Creating Mobile Apps with Appcelerator Titanium" is a practical, step-by-step guide to building iPhone, iPad, and Android applications using JavaScript. This book will give you a solid grounding of the dos and don'ts of mobile development and also covers a lot of the functionalities offered by the Titanium platform. This book begins with a look at what the Titanium platform has to offer. By taking you through clear tutorials on developing each application step-by-step, it helps you to apply your newly acquired knowledge afterwards. The difficulty level gradually increases along the course of the book. Each application from this book covers different aspects of mobile development. Every chapter starts by defining the application's features as well as the user interface structure. Every single code section is then explained and put into context allowing you to gain a clear understanding of their purpose and functionality. The book takes a “small milestone” approach, allowing you to actually run the application and see the progression. Every step is accompanied by many screenshots so you can see the expected result on screen. You will learn everything you need to know to develop your very own mobile applications. The book takes a laid-back approach to Titanium development and provides information in a way designed to never overwhelm the reader with information and also uses clear diagrams, screenshots, and tips throughout.
Table of Contents (18 chapters)
Creating Mobile Apps with Appcelerator Titanium
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Retrieving the stock values from the Internet


The very last piece of our puzzle will be to retrieve the stock's latest price from the Internet. For this, we will encapsulate this feature into its own service. We will create a new file named OnlineQuotesService.js and it will be located in the Resources/service directory.

Inside this file, we will load into memory the preference service using the require function, and store its content in a variable named ps for later use. We will also create an empty function named OnlineQuotesService that will represent our service:

var ps = require('service/PreferenceService');

function OnlineQuotesService() {}

Knowing where to get it

Before we do any coding, we need to determine how we will be retrieving the information. There are many online web services to choose from. But for our specific purpose, we will be using the Markit Stock Quote API. Its main advantages are the fact that it is free and that the return format used by the API is JSON, which will...