CODEWITHSUNDEEP
flutter
evergreen
evergreen

Reputation: 763

flutter bloc streambuilder with refreshindicator rebuild twice

Widget build(BuildContext context) {
final blocData = WeatherBlocProvider.of(context).bloc;
    if (WeatherBloc.permission == true) {
      blocData.forceRefreshAll();
      return Container(
        child: StreamBuilder(
            stream: blocData.zipAll,
            builder: (scontext, snapshot){
                //to do
               }

now i am using bloc pattern with streambuilder and when i refresh parent widget i can see blocData.forceRefreshAll() this line is requested twice.(i mean build method is requested twice) how can i make only one? i saw unwanted rebuild subject and they said use instance or initstate but with bloc pattern i think using initstate is not possible and const value is not working with blocData.forceRefreshAll()

Upvotes: 0

Views: 1381

Answers (1)

Mikhail Ponkin
Mikhail Ponkin

Reputation: 2711

build method is meant to build widget tree, it can be called multiple times for various reasons. This is why should not fetch data in build.
If you can't access bloc in initState because there is no context yet - override another method, didChangeDependencies. It's called right after initState and it can use context, so you can access bloc provider with it.

Upvotes: 2

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