Apps Update data to tab Fragment Android when swipe

[longtugia]

I have a problem with my code, and i try fix it by search google but not work. I try writing a karaoke List App to view list songs and favorite songs.This app have 2 Fragment Tab, List and Favorite, I want that when user click add Favorite in List Tab or Favorite tab, favorite tab will be updated immediately. But it not work. I must restart my app to view result. I try to refresh Favorite tab by getItem but it not work.

It's my code in GitHub:
https://github.com/anhpha90/KaraokeList