Player problems

I need help controlling my players from walking away from the table in the middle of combat. they stay in the game but it is starting to get annoying when they finish playing video games be for combat is over. Any advise?

I don't know if it's me being boring or them being hard to handle

If your players can't focus enough on the game to not play video games during combat, they probably shouldn't be playing D&D. It could be partially based on your DMing talent, but it's definitely mostly the players' problem.