Example:īy using safe Args for actions & passing data during the navigation. You'd consider passing some data between destinations/fragments for instant you would consider the passed-in data to be integers and create constant integers for each fragment, whenever you do a navigation, then pass the constant assigned for the current fragment. The previous fragment is neither Fragment a nor b You can find both tutorials here : Android. Android Studio Arctic Fox (2020.3.1) updates Android Studio to version 2020. To know the previous fragment in fragment_c: val previousFragment = findNavController().previousBackStackEntry?.destination?.id Earlier we had learn how to pass data from one activity to another and get back data from another activity.
And at the fragment_c you need to know from which it's reached: If the Back button is going to return the user to the previous Fragment, then you’ll need to save each Fragment transaction to the back stack, by calling addToBackStack () before you commit () that transaction. So, to get the id of the previous destination use: previousBackStackEntry?.destination?.idįor instance, assume you've 3 fragments: fragment_a, fragment_b, and fragment_c.
The previous visible entry on the back stack or null if the back stack has less than two visible entries
Instead of the headache of tracking the previous fragment with passed-in arguments, you'd use previousBackStackEntry which returns a NavBackStackEntry that is:
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