ajilo297

import 'dart:async';

class StreamedList<T> {
  StreamController<List<T>> _controller = StreamController.broadcast();

  Stream<List<T>> get stream => _controller.stream;
  List<T> get dataList => this._list;

  List<T> _list = [];

escamoteur

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {

  TabController _tabController;

  FocusScopeNode _node = FocusScopeNode();   /// <-----------------

  @override
  void initState() {
    _tabController = TabController(length: 3, vsync: this);

Nash0x7E2

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';

//Main function. The entry point for your Flutter app.
void main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        body: DemoApp(),
      ),