Flutter-如何从另一个小部件重建将来的小部件

Question

I tried to make the code below simple as possible, I have no idea what approach I should be trying to take.

I have a future builder that returns weather API data. I have a timer to stop spamming of API. But how can I get the weather widget to reload so the FutureBuilder is called again?

main.dart

  CurrentWeatherWidget(),

current_weather_widget.dart

  return Column(
  children: <Widget>[
    FutureBuilder<CurrentWeatherFactory>(
        future: main,
        builder: (context, snapshot) {
          if (snapshot.hasData)
          {
           >> DISPLAY WIDGET
          } else if (snapshot.hasError)
          {
            return Text(snapshot.error);
          }
CircularProgressIndicator(),

some_other_widget.dart

RaisedButton(
onPressed: (){
    if (timer() == 0){
        timerReset();
        >> RELOAD current_weather_.dart

    } else {
        print("no new data");
    }

    },
    child: Text('RELOAD NEW DATA'),

),

Any help is appreciated.

Answer 1

I would suggest replacing the FutureBuilder with a StreamBuilder and updating the stream every time new weather data is available. So instead of using a Future you could use a BehaviorSubject and call its add method to update the stream.