Currently, Flex 4.5 / AIR 2.6 for Android provides a consistent platform for desktop and mobile apps. While consistency is very important there are times when developers need to extend beyond the common APIs.
This article, posted by James Ward on his blog, will walk you through how to integrate AIR for Android applications with other native APIs and functionality in the Android SDK. It covers three common use cases for native extensibility: System Notifications, Widgets, and Application Licensing.
This is a great post that alleviates my biggest concern regarding the usability of Flex as a development platform for mobile applications. I intend to use this information on Tikal‘s next FuseDay, in the session for developing a mobile application over Flex that needs some native APIs.