I'm not sure why "https://stackoverflow.com/questions/18142763/is-it-possible-to-show-full-screen-activity-without-leaving-room-using-google-re" was closed as "off topic" as I have the same question.
If I switch to text messaging, someone calls, etc, then onPause() and potentially onStop() will be called. I presume those are what forces one to leave the room in a multiplayer game. I would rather the game not be ruined by these events though. Is it possible to somehow stay in the room while sending someone a quick text message or answering a phone call? Must I create a background service or something?