Bad state: You cannot close the subject while items are being added from addStream in flutter

Question

I am using RxDart to observe changes and update the UI accordingly. When the app launches I am making a network call and successfully getting the data, observe the changes a

Answer 1

You can also resolve it be replacing:

MovieDetailBloc() {
  _movieId.stream.transform(_itemTransformer()).pipe(_trailers);
}

with

MovieDetailBloc() {
  _movieId.stream.transform(_itemTransformer()).listen((data) {
    if (!_categories.isClosed) {
      _trailers.add(data);
    }
  });
}

Answer 2

I think draining the stream should fix the problem

  dispose() async {
    _movieId.close();
    await _trailers.drain();
    _trailers.close();
  }

https://api.dartlang.org/stable/2.0.0/dart-async/Stream-class.html