Code Behind Problems (building for AIR)

programming flash
1

I’ve been trying to set up a nice environment on Flex 4 and Flash Builder 4 by using the “code behind” philosophy on my Application tag. This has given me a silly amount of problems!

So working with this:
[LIST]
[]src
[LIST][](default package)
[LIST][]Test.mxml
[]TestBase.as[/LIST]
[*]Test-app.xml[/LIST]
[/LIST]

// TestBase.as
package {
	import spark.components.WindowedApplication;
	import mx.controls.Alert;
	
	public class TestBase extends WindowedApplication {
		public function TestBase() {
			super();
			
			Alert.show("hello");
		}
	}
}

and

<?xml version="1.0" encoding="utf-8"?>
<app:TestBase xmlns:fx="http://ns.adobe.com/mxml/2009" 
					   xmlns:s="library://ns.adobe.com/flex/spark" 
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   xmlns:app="*">
	<fx:Declarations>
		<!-- Place non-visual elements (e.g., services, value objects) here -->
	</fx:Declarations>
</app:TestBase>

Firstly I can’t seem to be able to put either of these two files into a package other than the default one without getting error’s about the -app.xml file.

Secondly, it seems I can’t name my class Test.as, this confuses Flex so I renamed it TestBase.as.

However, once they’ve been renamed and are both in the default package Flex wants an -app.xml file for both of them. So humouring it I created a TestBase-app.xml alongside the already existing Test-app.xml.

Only now does Flash Builder 4 not show any errors in any of the files in my project. So I move to run it and I get an alert with the error:

If the program is already running, close it before attempting to run.

I googled this error but got absolutely nothing.

I also found this, thinking it was the solution to my problem but I’m not entirely sure what the solution is.

All I want is to be able to represent the Flex Application as an AS3 class, ideally in my package structure, but I guess that’s not essential.

Anybody know what on earth is going on here?