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
About the Author
About the Reviewers

Getting the device's location

In order to search photos that were taken around the device's location, it is imperative that we determine where this location is. Titanium provides us with a Geolocation module that is provided with the SDK.

The module provides the following two main families of features:

  • Location services that can be used to determine the location of the device.

  • Geocoding and reverse geocoding that can be used to convert geographic coordinates into street addresses. The reverse is also possible, meaning that we can convert physical addresses into geographic coordinates.


Be always thoughtful of power consumption when dealing with location services. Many factors such as accuracy and update frequency can have a huge impact on the device's battery life, if it is not used properly.

How does that translate into code?

Inside our ApplicationWindow function, after defining the user interface, we will add our Geolocation code.

On iOS specifically, the user must approve the use of the location...