Android run in background

is it possible the apps/games run in background at android?
my apps/games is live streaming
so if the players hide the apps/games to background will freeze the apps/games
and when the players come back sometimes will mess up all the thing
any help?

see this one Android app is actually running in background! - It work! - Unity Engine - Unity Discussions

Hola, yo consegui hacer una aplicacion en Unity que corra en background, mediante servicios de Android nativo.