Aral Balkan

If you're using code-behind in your AIR apps, there's a little gotcha you should watch out for: Flex Builder doesn't like it if you include your code behind class in the root package.

For example, if your main MXML file is Main.mxml and your code-behind class is MainClass.as, Flex Builder gets confused and thinks that there should be two application configuration files (one for the MXML file and one for the AS file.) If your app.xml file is named Main-app.xml, you'll get an error along the lines of Adobe AIR application is missing the corresponding MainClass-app.xml.

The workaround is simple, just move your code-behind class off of the root package. e.g., put it in com.mydomain.myapp.view.

Comments

• Arrgg.... yay! A few weeks back I couldn't waist another day on figuring the obscure error and left the code within the main mxml. Now I know. Thanks Aral! Cheers

  by Phil Desenne on 2009-02-20 20:42:12

• You can solve this issue in Flash Builder by removing the code behind as Application in the "Flex Applications" part of the project properties dialog.

  by Steven Peeters on 2010-04-17 17:31:51

• This doesn't work in Flash Builder even if you move the code out of the root package it still throws this error.

  by Peter on 2010-04-12 12:57:39

• thx a lot !

  by YopSolo on 2010-06-28 13:13:07

• Thanks Steven Peeters, this is more likely a Flash Builder bug than a Air bug, right? Flash Builder can't deside which class to choose as default.

  by Ercan Bozoglu on 2010-06-16 21:57:07

• Unfortunately this doesn't seem to solve my problem. My code behind class isn't in the root package and it still causes problems.

  by Jeremy on 2011-02-04 10:08:03