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

System class


We may need to access a device-specific property at runtime. This device-specific property means Device name, checking the presence of camera, screen width, and many more things. Rhodes provides a System Ruby class that provides access to system-specific information.

The basic syntax for using System class is:

System.get_property(system_property)

Here, system_property is the property that you want to access. These are a list of properties we can use:

  • platform – It returns the device name. For example: APPLE, Blackberry, WINDOWS, ANDROID, SYMBIAN.

  • has_camera It will check whether a camera is available on the device.

  • screen_width It returns the screen width in pixels.

  • screen_height It returns the screen height in pixels.

  • screen_orientation – It returns the screen orientation. For example: portrait, landscape, etc.

  • ppi_x – It returns the horizontal PPI (Pixels Per Inch)

  • ppi_y It returns the vertical PPI (Pixels Per Inch)

  • has_network It checks whether the device is connected...