“Comment obtenir des données en temps réel Flutter” Réponses codées

Comment obtenir des données en temps réel Flutter

Stream<Object> objectStream() async* {
  while (true) {
    await Future.delayed(Duration(milliseconds: 500));
    Object object = getObjectFromAPI();
    yield object; //yield is like return
  }
}

// add this widget 
StreamBuilder(
    stream: objectStream(),
    builder: (context, snapshot) {
    	if(snapShot.connectionState == ConnectionState.waiting){
         	// do something
        }else if (snapShot.data != null) {
        	// do something
        }
    }
)

// to prevent restarting with every set state you can create
late Stream<Object?> objectStream;

@override
  void initState() {
	// add data to it from here
    objectStream = objectStream();
    super.initState();
  }