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.

Plese show us what have you tried? – Kaushik Burkule Oct 01 '19 at 08:51 — Kaushik Burkule, Oct 01 '19 at 08:51
Please add your source code here – Akhil Oct 01 '19 at 08:59 — Akhil, Oct 01 '19 at 08:59

score 5 · Answer 1 · answered Feb 14 '20 at 20:56

The accepted answer is not an answer to your question. As you point out: you cannot use getArguments() in your Activity, you can only do that in a fragment. However, in an activity you can get the data like this (java syntax):

String aField = BActivityArgs.fromBundle(getIntent().getExtras()).getAField()

So, just replace getArguments() with getIntent().getExtras() if you have an Activity on the receiving end.

score 0 · Accepted Answer · answered Oct 01 '19 at 09:41

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 + "")
}

getArguments() can only get argument in fragment. I want to get argument in activity. — Danh Danh, Oct 01 '19 at 09:45
I have read your link and I can get the argument by : `val args : BActivityArgs by navArgs()` outside onCreate. Thanks alot — Danh Danh, Oct 01 '19 at 10:21

score 0 · Answer 3 · answered Mar 25 '21 at 22:30

0

BActivityArgs.fromBundle(getIntent().getExtras()).getAField();

Work perfectly

answered Mar 25 '21 at 22:30

logancodemaker

582
3
14

score 0 · Answer 4 · answered Jul 09 '21 at 23:34

As stated in the official documentation HERE :

The Navigation component is designed for apps that have one main activity with multiple fragment destinations. The main activity is associated with a navigation graph and contains a NavHostFragment that is responsible for swapping destinations as needed. In an app with multiple activity destinations, each activity has its own navigation graph

A solution might be: rethink if the activity could be converted to a Fragment and then the newly created Fragment could be handled by the same Navigation Component. Thus allowing you to use the normal SafeArgs syntax to pass and retrieve data.
If you are still having problems with the SafeArgs plugin, I would highly recommend this medium article by the official Android team, HERE

Passing argument from fragment to activity using SafeArgs

4 Answers4