Minimal Application

public class FragmentEvent extends Fragment {

    Button scanner;

    private final ActivityResultLauncher<ScanOptions> fragmentLauncher = registerForActivityResult(new ScanContract(),
            result -> {
                Log.i(TAG, "On Scanner Launcher.....");
                if(result.getContents() == null) {
                    Toast.makeText(getContext(), "Cancelled from fragment", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getContext(), "Scanned from fragment: " + result.getContents(), Toast.LENGTH_LONG).show();
                }
            });

    public FragmentEvent() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_event, container, false);
        Button scan = view.findViewById(R.id.scanner);
        scan.setOnClickListener(v -> scanFromFragment());
        Log.i(TAG, "On Create .....");
        return view;
    }

    public void scanFromFragment() {
        Log.i(TAG, "On Scanner Initialization.....");
        fragmentLauncher.launch(new ScanOptions());
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.i(TAG, "On Resume .....");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(TAG, "On Destroy .....");
    }

    @Override
    public void onPause() {
        super.onPause();
        Log.i(TAG, "On Pause .....");
    }

    @Override
    public void onStart() {
        super.onStart();
        Log.i(TAG, "On Start .....");
    }

    @Override
    public void onStop() {
        super.onStop();
        Log.i(TAG, "On Stop .....");
    }
}