How to do it...

For this recipe, we will build a simple example of using streams:

1. Create a new app and name it stream_demo.
2. Update the content of the main.dart file as follows:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Stream',
      theme: ThemeData(
        primarySwatch: Colors.deepPurple,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: StreamHomePage(),
    );
  }
}

class StreamHomePage extends StatefulWidget {
  @override
  _StreamHomePageState createState() => _StreamHomePageState();
}

class _StreamHomePageState extends State<StreamHomePage> {
  @override
  Widget build(BuildContext context) {
    return Container(
    );
  }
}

3. Create a new file in the lib folder of your project, called stream.dart.
4. In the stream.dart file, import...