This is a example for the implementation navigation jetpack with bottom navigation.

The first thing you should know is how the Navegation Jetpack works. The basic idea of this new navigation, is that we have a resource called NavGraph, which can contain a set of fragments that connect to each other, with it we have a visual way of seeing the navigation that the application will have.

This NavGraph for them to work must be implemented inside a navHost, which is a component that allows you to visualize a navGraph and have all its features (actions, OnBackPress, Animations, etc).

In this project this Navigation Jetpack will be used through a bottomNavigation, which each item will have its own navigation and maintain it when changing items.

As mentioned before, for a navGraph to work you must add it inside a navHost, this navHost is not created as a resource inside the xml, but is created dynamically depending on which item was selected.

As you can see in the image, each time you select an item you create or search for a navHost and insert the navGraph associated with the item. Once you get this navHost is replaced in a frameLayout to be displayed.

Everything else, navigation, actions, animations, etc, must be created or managed within the navGraph.