Calling async event in flutter_bloc - flutter

Question

I am trying to fetch data from API as soon as the flutter app loads but I am unable to achieve so
class MarketBloc extends Bloc<MarketListEvent, MarketListState> {
MarketBloc() : super(MarketLoading()) {
on<MarketSelectEvent>((event, emit) async {
emit(MarketLoading());
final data = await ApiCall().getData(event.value!);
globalData = data;
emit(MarketDataFetched(marDat: globalData.data, dealType: event.value));
});
}
}
I have called MarketLoading state as the initial state and I want to call MarketSelectEvent just after that but in the current code, action is required to do so and i want to achieve it without any action.

Answer 1

You have 2 options:
add an event from the UI as soon you instantiate the MarketBloc
MarketBloc()..add(MarketSelectEvent())
add an event in the initialization code
MarketBloc() : super(MarketLoading()) {
add(MarketSelectEvent());
}

Answer 2

You could do this with in the initState of whatever the first page is that your app loads.
class TestPage extends StatefulWidget {
#override
State<TestPage> createState() => _TestPageState();
}
class _TestPageState extends State<TestPage> {
late MarketBloc marketBloc;
#override
void initState() {
super.initState();
marketBloc = BlocProvider.of<MarketBloc>(context);
marketBloc.add(MarketSelectEvent());
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: BlocBuilder<MarketBloc, MarketListState>(
builder: (context, state) {
if (state is MarketLoading) {
return Text('loading...');
}
if (state is MarketDataFetched) {
return ...your UI that contains data from API call
}
},
),
),
);
}
}