Fraser Crosbie – Calgary Flash & Flex Developer

I just finished an AIR (Apollo) application that loads and saves data from an external XML file. I figured I would share the code to accomplish this task as there is not a lot of Apollo info around at this time.

First off lets start with loading an XML file and reading its contents. I realize that there are much easier ways to load XML into Flash than this, but the advantage here is that I can use File.applicationResourceDirectory which allows me to target the installation directory for the XML file that was included with the AIR package. In this snippet I am using the synchronous open method. This essentially pauses everything else in the Flash movie until it has completed its task (opening the file).

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A few posts ago, I showed you how to build a basic menu using an Array of button names. Now, I will demonstrate how to build the same menu, but this time use the new XML class which is based on E4X. There are many benefits of using XML in your applications. The main reason being that it allows you to update your application instantly without having to open up Flash to republish it. XML also allows your application to be easily updated from a server side page that generates XML output. This opens up the possibility of using a CMS to modify your application, thus enabling your clients to make updates on their own. Almost every project I develop uses XML.

And now for the code:

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