Comments on: Returning values from JavaScript in your Flex applications using the ExternalInterface API

By: nathan king

nathan king — Wed, 23 Jul 2008 17:38:33 +0000

found it - for anyone else looking - you have to register the javascript function and associate it with the internal flex function you wish to call using the following syntax within your flex app:

ExternalInterface.addCallback(”jsFunctionName”, flexFunctionName);

or just try searching this blog (duh), apologies.
http://blog.flexexamples.com/2008/03/11/calling-actionscript-functions-from-your-html-templates-using-the-externalinterface-api/

By: nathan king

nathan king — Wed, 23 Jul 2008 15:30:24 +0000

poking around to find out if JS can make a call to a function inside a flex app without flex initiating the interaction. Thoughts?
Thank you so much forthe code examples,
-Nathan

By: peterd

peterd — Fri, 21 Mar 2008 23:38:52 +0000

MArcio,

If you’re using the creationComplete event, it may be a timing issue. With the ExternalInterface API there is never really a guarantee that the Flex app will complete before/after the HTML container its in.

What if you try using a timer and putting a delay of say, 2 seconds? (or 4 seconds).
If the code works in that scenario, I would guess its a simple timing issue and the HTML just isn’t fully initialized yet.

Peter

By: MArcio

MArcio — Fri, 21 Mar 2008 18:55:00 +0000

arr.appVersion: undefined

I’m usign on creationComplete of my mx:Application

private function callJavaScript_BrowserInfo():void {
var keys:Array = "appCodeName,appName,appVersion,cookieEnabled,language,platform,systemLanguage,userAgent,userLanguage".split(",");
var arr:Array = ExternalInterface.call("getNavigatorObject", keys);
trace("arr.appVersion: " + arr.appVersion);
dataGrid.dataProvider = arr;
if (arr){
for (var i:int = 0; i

By: peterd

peterd — Fri, 21 Mar 2008 16:29:23 +0000

MArcio,

Does calling trace(arr.appVersion); work after calling ExternalInterface.call()?

Peter

By: MArcio

MArcio — Fri, 21 Mar 2008 15:04:55 +0000

How to trace a value returned for example

private function callJavaScript():void {
var keys:Array = "appCodeName,appName,appVersion,cookieEnabled,language,platform,systemLanguage,userAgent,userLanguage".split(",");
var arr:Array = ExternalInterface.call("getNavigatorObject", keys);
for (var i:int = 0; i