I'm using flex 4.6 for developing mobile application. I need to create an alarm application with Flex for iPhone/Android. I came to know we have to use/schedule local notification class to build an alarm application and i found an example here @ http://www.adobe.com/devnet/air/native-extensions-for-air/extensions/notification.html
But from the zip file you can download from the above link, only shows how to trigger notification class by a button click.
How do I trigger this by automatic at a particular time period to make an alarm application?
The only way is to create ANE for both iPhone and Android using native code and call in on Flex. Refer this link for know more about ANE
http://help.adobe.com/en_US/flex/mobileapps/WSe4e4b720da9dedb5-4aefe03513238d8a1b8-8000.html
Here are some examples http://sleepydesign.blogspot.in/2012/07/ane-free-air-native-extensions.html