Deep linking in Flex mobile apps

I need to build in deep linking into an existing iOS and Android app using
the Flex 4.12 SDK.

Requirements - app already installed - Allow the user to click a link to
open the application in a specific location other than the default startup
screen.

This will typically be a result of clicking a link in a Twitter card:
https://dev.twitter.com/docs/cards/app-installs-and-deep-linking
<https://dev.twitter.com/docs/cards/app-installs-and-deep-linking>

In a browser based app you could inspect the url and obtain parameters but
since the app is being launched by the operating system, how can this
information be passed in and used by the Flex mobile app?

Thanks!