Reduce Flutter Widget Rebuilding while using Provider

main.dart

import 'package:flutter/material.dart';
import 'package:letswatch/video_store.dart';
import 'package:provider/provider.dart';

class Video {
  String url;
  Status status = Status.notReady;

  Video(this.url, {this.status = Status.notReady});

  void changeStatus(Status status) {
    print(
        'change status from ${this.status.toString()} to ${status.toString()}');
    this.status = status;
  }
}

enum Status { notReady, loading, ready, playing, paused, error }

class VideoStore with ChangeNotifier {
  Video? _video;
  Video? get video => _video;

  Future<void> playMedia(Video video) async {
    _video = video;
    _video?.changeStatus(Status.loading);
    notifyListeners();

    Future.delayed(const Duration(seconds: 2), () {
      _video?.changeStatus(Status.error);
      notifyListeners();
    });
  }
}


void main() {
  runApp(
    ChangeNotifierProvider(
      create: (context) => VideoStore(),
      child: const MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Video? _video;

  @override
  void initState() {
    _video = Video('https://video.example.com');
    super.initState();
  }

  void _playMedia() {
    Provider.of<VideoStore>(context, listen: false).playMedia(_video!);
  }

  bool useConsumer = false;

  @override
  Widget build(BuildContext context) {
    if (useConsumer) {
      return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                'Consumer Way:',
                style: Theme.of(context).textTheme.headline3,
              ),
              Consumer<VideoStore>(builder: (context, value, child) {
                return Text(
                  value.video == null
                      ? "Unknown"
                      : value.video!.status.toString(),
                  style: Theme.of(context).textTheme.headline4,
                );
              }),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: _playMedia,
          tooltip: 'Play',
          child: const Icon(Icons.play_arrow),
        ),
      );
    } else {
      final video = Provider.of<VideoStore>(context).video;

      return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                'Other way',
                style: Theme.of(context).textTheme.headline3,
              ),
              VideoStatus(video: video),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: _playMedia,
          tooltip: 'Play',
          child: const Icon(Icons.play_arrow),
        ),
      );
    }
  }
}

class VideoStatus extends StatelessWidget {
  const VideoStatus({
    Key? key,
    required this.video,
  }) : super(key: key);

  final Video? video;

  @override
  Widget build(BuildContext context) {
    return Text(
      video == null ? "Unknown" : video!.status.toString(),
      style: Theme.of(context).textTheme.headline4,
    );
  }
}