Right now I've got weather now and pluto.tv as my sources. Are there more? I've come across tablo tv (don't have the receiver), HDhomerun (again, no receiver) and Cumulus. I couldn't figure out Cumulus (creating the JSON file etc). Are there any more known sources that can feed into this live channels app? It seems to have a ton of potential
You can check here: http://androidtv.news/2016/01/running-list-of-live-channel-sources/
Cumulus TV should handle all the data formatting in the UI, so you just have to supply the streams.