What methods can be used to organize data exchange between two fragments in an application?

In Android, there are several approaches to exchange data between two fragments:

1. Through Activity — fragments communicate via the parent Activity, which acts as an intermediary. One fragment passes data to the Activity, and the other receives it.

2. ViewModel with LiveData — a shared ViewModel associated with the Activity allows fragments to observe data changes and exchange data reactively.

3. Callback interfaces — a fragment implements an interface that another fragment calls through the Activity.

4. SharedPreferences or databases — for more persistent storage and data exchange.

Example with ViewModel:

class SharedViewModel : ViewModel() {
    val selectedItem = MutableLiveData<String>()
}

// In the first fragment
sharedViewModel.selectedItem.value = "Data to pass"

// In the second fragment
sharedViewModel.selectedItem.observe(viewLifecycleOwner) { data ->
    // Handle received data
}

This method is considered modern and convenient for exchanging data between fragments within the same Activity.