Using classes

You put your other classes in the same folder/directory as your Main class.

The Main class is the only one that you have to enter the location for in Properties. AIR needs to know which is the first class it must instantiate to start the application. You enter the name of this class in Properties and by convention, it is called Main.as.

Hi

Is your question about putting multiple classes in the same "Actionscript" file ?

You can only have one externally visible class in one ".as" file. Though you can have classes outside the package .

Example:

(1) Sample 1 :

package {   public class PubClass   {        public function PubClass()        {             trace("PubClass constructor");             var b:AnotherClass = new AnotherClass();        }   }   internal class AnotherClass {        public function AnotherClass() {             trace("Hello");        }   } }

You will get error similar to :

An externally-visible definition with the name 'AnotherClass' was unexpectedly found.

Though, this will be the legal way to add another class :

(2) Sample 2 :

package {        public class PubClass {            public function PubClass() {                  var b:AnotherClass = new AnotherClass();             }        } }      class AnotherClass {             public function AnotherClass() {                  trace("Hello");             }       }

Class 'AnotherClass' is only visible to class PubClass - you cannot have more than one visible class in one file (exactly what the error message states).

Though, you should try to keep only one class in a single file, because it will be easier for you to find your class at any point of time. Also, it will be more handy with any source control system (if a file changes, then you know that a particular class has changed).

Tell me if it was what you were looking for, and if it solves your query.

For more references, check out this and this

Hi, I don't really know what you mean with "flash air using a class".

You have your main class, where everything starts. Your Main, usually extends from Sprite.

After that, you can add all the classes you need and instantiate them in your main class. They can extend from Sprite, EventDispatcher... etc, or not.