Phonegap Application Development
Before I go much further, I need to clear up a potential source of confusion. Phonegap initially was developed by a company named Nitobi, which subsequently was acquired by Adobe. In 2011, Nitobi/Adobe donated the Phonegap code base to the Apache Foundation. As a result of this contribution, they needed to ensure that the intellectual property was unfettered by trademark ambiguity, so they renamed the Phonegap project to Cordova. The Apache Foundation is in the process of migrating from Phonegap to Cordova, so I refer to this project as Cordova here.
Getting started with Cordova on Android isn't difficult. At the risk of rehashing material that is well documented elsewhere, I'll just outline the process involved. First, you have to install the Android SDK, which is a free download from the Android site and is very well documented. The Android SDK integrates with the Eclipse IDE, so you will need to have a fairly recent version of Eclipse as well. The SDK documentation will walk you through the whole process, from downloading the software to building and running the sample application. The SDK lets you run your program in an emulator or on a real Android device, if you have one.
Installing Cordova is also fairly straightforward and well documented. The only difficulty I had with the entire process is that I wasn't very familiar with Eclipse and stumbled a bit. The Cordova installation process culminates with building and running the sample Cordova application. The sample application demonstrates much of Cordova's API and is worth looking at.
I found the process of creating a new Cordova project to be a bit kludgey. The process involved creating a new Android project first, then making a two-line modification to a Java program, pasting in a dozen lines of XML into another file, and well, you get the idea. All of the changes made sense, but seemed a bit error-prone. Finally, I decided to copy the example project and strip it down to its bare necessities. This is the approach that I recommend; it worked like a champ for me.
Let's look at some code.
For the sake of illustration, I developed a simple application. The application is designed to demonstrate three main features: access to the device's GPS sensor, access to the user's contacts and the ability to make Ajax calls to remote Web services.
The HTML needed to create this application is pretty straightforward. See Listing 1.
Listing 1. HTML for the Sample Application
Figure 1. Sample Application Running in a Browser
Mike Diehl is a freelance Computer Nerd specializing in Linux administration, programing, and VoIP. Mike lives in Albuquerque, NM. with his wife and 3 sons. He can be reached at email@example.com
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