Passing argument from fragment to activity using SafeArgs

Question

Using navigation graph, when i navigate from fragment to activity and also passing argument using safeargs, in activity, I cannot get argument. How can I get argument passing from fragment???

In fragment, I can get argument by getArgument() function, but not in activity.

In fragment I switch to another activity by:

findNavController().navigate(AFragmentDirections.actionAFragmentToBActivity(1)

and in B activity get argument in onCreate by :

val args = BActivityArgs.fromBundle(savedInstanceState!!)

but my app crash immediately.

Answer 1

Check it out the Android Doc :-

https://developer.android.com/guide/navigation/navigation-pass-data#java

Send Data

@Override
public void onClick(View view) {
EditText amountTv = (EditText) getView().findViewById(R.id.editTextAmount);
int amount = Integer.parseInt(amountTv.getText().toString());
ConfirmationAction action =
       SpecifyAmountFragmentDirections.confirmationAction()
action.setAmount(amount)
Navigation.findNavController(view).navigate(action);
}

Get Data :-

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
TextView tv = view.findViewById(R.id.textViewAmount);
int amount = ConfirmationFragmentArgs.fromBundle(getArguments()).getAmount();
tv.setText(amount + "")
}