Augmented reality on Android: which version of the OS would be needed?

Which version of Android is needed to create a working augm开发者_如何学Cented reality application ?

---

All that is needed for an augmented reality app is access to the camera's preview data. This has been available since Android API Level 1 (1.0). So technically, you can develop an augmented reality app on any version of Android.

See: Camera.PreviewCallback