Jetpack Navigation Animation Complete Listener

Question

I'm trying to get a callback, using the Jetpack Navigation library, when a new navigation event is completed in order to change the status bar color.

So far I've found navController.addOnDestinationChangedListener which notifies me when a new navigation starts but not when it completes, meaning that the enter/exit transitions have completed.

Is there any method to know when all navigation transitions have completed?

Answer 1

You can use something like this:

val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment)
navHostFragment?.childFragmentManager?.addOnBackStackChangedListener {
    val currentFragment = navHostFragment.childFragmentManager.fragments.firstOrNull()
    if (currentFragment is YourFragment) {
        // your code here  
    } 
}