not ready yet
The best communication hardware between EV3 and android is USB/OTG Host. Unfortunately, a number of tested devices do not support Android USB Host API. Some of them do not have physical USB/OTG, and some of them have the API blocked despite of working USB OTG host itself.
Supported Android devices:
Devices without USB/OTG
I use ASUS fonetab 7, Lego brick is connected to USB/OTG plug
Hosts the same nodes as TV box version plas periodically publishes images from camera
Current version of Android app runs ROS master node, Lego ROS Node and publisher of camera images.
Asus fonetab7 onboard
Screenshot