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

Camera


Native applications can access the camera of the phone and perform operations like taking the picture, uploading it, and so on.

To check whether the device has a camera we can use following command:

System::get_property('has_camera')

The Camera API provides the following functionality:

Taking a picture

To take a picture, use the following command:

Camera::take_picture('/app/model/camera_callback')

This method will take the picture and once the picture is taken it will call camera_callback.

Choosing a picture from an album

We can choose a picture using the following command:

Camera::choose_picture('/app/model/camera_callback')

Once the user has taken/chosen a picture, the callback URL you specified will be called. The callback is a POST message; the body of the message contains the status and image_uri.

status can have: ok, cancel, or error value.

image_uri points to the taken/chosen image stored in the /public/db-files folder; the image file will have an auto-generated name.