Book Image

Rhomobile Beginner's Guide

By : Abhishek Nalwaya
Book Image

Rhomobile Beginner's Guide

By: Abhishek Nalwaya

Overview of this book

The four Rhomobile products – Rhodes, Rhosync, RhoHub, and Rhogallery – provide a complete toolkit for creating a mobile application. Rhomobile is cross-platform and so allows you to build your application for many different types of smartphone – including iPhone and Blackberry – just with a single codebase. This makes it the most preferred and quickest way of developing mobile apps. As you create a native Rhomobile application, you can use the built-in device features such as GPS, Push, and Camera, all with offline capabilities.Rhomobile Beginner's Guide is filled with practical examples to help you to create a mobile application from scratch. You can choose on which operating system to build, as well as for which smartphone to develop your application, giving you the freedom to create a customized mobile application quickly and easily.Once you have learned how to install Rhomobile on Windows, Mac, or Linux, you will create a simple application, which will be used to explore the products of Rhomobile one by one. Things really get going when you write unit test cases for your application before deploying it to the server and making builds for your chosen Smartphone. You will learn about the different aspects of Rhomobile, starting with Rhodes 3, which helps you to build a native mobile application. Rhosync 2.1 carries out the offline device capabilities and RhoHub deploys the code on the server and creates a build for the different smartphones. Rhomobile Beginner's Guide gives you the freedom to create a mobile web application on the platform of your choice, for the smartphone of your choice.
Table of Contents (17 chapters)
Rhomobile Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Geolocation


Rhodes provides Geolocation capabilities to get the latitude and longitude of your current location.

The new Rhodes version can use both GPS location provider and network-based location determination. Network-based location is not as precise as GPS but in most cases it consumes less power and returns results faster than GPS. Rhodes will update the location using network data until GPS has started, after which only GPS will be used to get more precise data.

Geolocation information is available in two ways:

  • As an asynchronous service through AJAX calls to a predefined local URL

  • In a controller using Ruby calls to the GeoLocation class

GeoLocation Ruby class

Rhodes provides GeoLocation class for accessing the device location.

We can get the current latitude by:

GeoLocation.latitude

We can get the current longitude by:

GeoLocation.longitude

Test if the location system is up and has acquired the position:

GeoLocation.known_position?