Will Unity views on Android devices be able to be embedded in other views? Basically we are interested in using Android built-in GUI components most of the time and showing 3D using Unity only part of the time. Thanks!
I guess that's a bit early to ask as Android support is not even fully implemented, yet (at least not officially available).
This is possible on the iPhone (using iPhone GUI components most of the time and showing 3D using Unity), so I guess there is a certain probability that something similar might be possible on Android as well. But that's really just speculation, so I wouldn't count on it.
Check out this answer and the link in the answer: How can I use Unity Android in an Android Application view sub section? - Questions & Answers - Unity Discussions