Handling back button in Android Navigation Component

Question

I\'d like to know how properly handle system back button action using Navigation Controller. In my app I have two fragments (for ex. fragment1 and fragment2) and I have an a

Answer 1

The recommended approach is to add an OnBackPressedCallback to the activity's OnBackPressedDispatcher.

requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner) { 
    // handle back event
}