...No more fragment stack logic. Single activity and Multi Fragment structure is a new trend and reasonable to choose. Most of the popular apps like Instagram, YouTube, Spotify, etc. use a Single Activity with a bottom bar and control multiple fragments in that single activity. It was always hard to manage fragment managers in our application. We are using a bottom bar and the user has his history in every bottom bar tab. For instance, In the Home tab, the user can go 4-5 fragments deep in the Home tab. ...