Book Image

Appcelerator Titanium Smartphone App Development Cookbook Second Edition

Book Image

Appcelerator Titanium Smartphone App Development Cookbook Second Edition

Overview of this book

This book will take you through the process of building cross-platform, native UI applications for the mobile from scratch. You will learn how to develop apps, how to use GPS, cameras and photos and how to build socially connected apps. You will also learn how to package them for submission to the App Store and Google Play. This cookbook takes a pragmatic approach to creating applications in JavaScript from putting together basic UIs, to handling events and implementation of third party services such as Twitter, Facebook and Push notifications. The book shows you how to integrate datasources and server APIs, and how to use local databases. The topics covered will guide you to use Appcelerator Studio tools for all the mobile features such as Geolocation, Accelerometer, animation and more. You’ll also learn about Alloy, the Appcelerator MVC framework for rapid app development, and how to transfer data between applications using URLSchemes, enabling other developers to access and launch specific parts of your app. Finally, you will learn how to register developer accounts and publish your very own applications on the App Store and Google Play.
Table of Contents (21 chapters)
Appcelerator Titanium Smartphone App Development Cookbook Second Edition
About the Author
About the Reviewers

Monitoring your heading using the device compass

This time , in our last recipe for this chapter on Maps and GPS, we will be using the inbuilt device compass to determine the heading. We'll present this heading using an image of an arrow to represent the direction visually.


Note that this recipe will not work on older iPhone devices, such as iPhone 3G; they lack the compass. You will need to use an actual device to test this recipe, as the emulator will not be able to get your current heading either.

The complete source code for this recipe can be found in the /Chapter 3/Recipe 7 folder.

How to do it...

Add the following code to your app.js file, just before you perform the method call at the end of the file:

//this image will appear over the map and indicate our
//current compass heading
var imageCompassArrow = Ti.UI.createImageView({
    image: 'arrow.png',
    width: 50,
    height: 50,
    right: 25,
    top: 5

//how to monitor your heading...