smart_dev_flutter_cast 1.0.0

A Flutter plugin that will let you discover cast devices like Chrome Cast and Apple TV and connect to them.

example/lib/main.dart

import 'dart:async';
import 'dart:convert';

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

String duration2String(Duration? dur, {showLive = 'Live'}) {
  Duration duration = dur ?? Duration();
  if (duration.inSeconds < 0) {
    return showLive;
  } else {
    return duration.toString().split('.').first.padLeft(8, "0");
  }
}

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(home: CastSample());
  }
}

class CastSample extends StatefulWidget {
  static const _iconSize = 50.0;

  const CastSample({super.key});

  @override
  _CastSampleState createState() => _CastSampleState();
}

class _CastSampleState extends State<CastSample> {
  late ChromeCastController _controller;
  AppState _state = AppState.idle;
  bool _playing = false;
  Map<dynamic, dynamic> _mediaInfo = {};

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Plugin example app'),
        actions: <Widget>[
          AirPlayButton(
            size: CastSample._iconSize,
            color: Colors.white,
            activeColor: Colors.amber,
            onRoutesOpening: () => print('opening'),
            onRoutesClosed: () => print('closed'),
          ),
          ChromeCastButton(
            size: CastSample._iconSize,
            color: Colors.white,
            onButtonCreated: _onButtonCreated,
            onSessionStarted: _onSessionStarted,
            onSessionEnded: () => setState(() => _state = AppState.idle),
            onRequestCompleted: _onRequestCompleted,
            onRequestFailed: _onRequestFailed,
          ),
        ],
      ),
      body: Center(child: _handleState()),
    );
  }

  @override
  void dispose() {
    super.dispose();
    resetTimer();
  }

  Widget _handleState() {
    switch (_state) {
      case AppState.idle:
        resetTimer();
        return Text('ChromeCast not connected');
      case AppState.connected:
        return Text('No media loaded');
      case AppState.mediaLoaded:
        startTimer();
        return _mediaControls();
      case AppState.error:
        resetTimer();
        return Text('An error has occurred');
      default:
        return Container();
    }
  }

  Duration? position, duration;
  Widget _mediaControls() {
    return Column(
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            _RoundIconButton(
              icon: Icons.replay_10,
              onPressed:
                  () => _controller.seek(relative: true, interval: -10.0),
            ),
            _RoundIconButton(
              icon: _playing ? Icons.pause : Icons.play_arrow,
              onPressed: _playPause,
            ),
            _RoundIconButton(
              icon: Icons.forward_10,
              onPressed: () => _controller.seek(relative: true, interval: 10.0),
            ),
          ],
        ),
        Text(duration2String(position) + '/' + duration2String(duration)),
        Text(jsonEncode(_mediaInfo)),
      ],
    );
  }

  Timer? _timer;

  Future<void> _monitor() async {
    // monitor cast events
    var dur = await _controller.duration(), pos = await _controller.position();
    if (duration == null || duration!.inSeconds != dur.inSeconds) {
      setState(() {
        duration = dur;
      });
    }
    if (position == null || position!.inSeconds != pos.inSeconds) {
      setState(() {
        position = pos;
      });
    }
  }

  void resetTimer() {
    _timer?.cancel();
    _timer = null;
  }

  void startTimer() {
    if (_timer?.isActive ?? false) {
      return;
    }
    resetTimer();
    _timer = Timer.periodic(Duration(seconds: 1), (timer) {
      _monitor();
    });
  }

  Future<void> _playPause() async {
    final playing = await _controller.isPlaying();
    if (playing == null) return;
    if (playing) {
      await _controller.pause();
    } else {
      await _controller.play();
    }
    setState(() => _playing = !playing);
  }

  Future<void> _onButtonCreated(ChromeCastController controller) async {
    _controller = controller;
    await _controller.addSessionListener();
  }

  Future<void> _onSessionStarted() async {
    setState(() => _state = AppState.connected);
    await _controller.loadMedia(
      'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
      title: "TestTitle",
      subtitle: "test Sub title",
      image:
          "https://smaller-pictures.appspot.com/images/dreamstime_xxl_65780868_small.jpg",
    );
  }

  Future<void> _onRequestCompleted() async {
    final playing = await _controller.isPlaying();
    if (playing == null) return;
    final mediaInfo = await _controller.getMediaInfo();
    setState(() {
      _state = AppState.mediaLoaded;
      _playing = playing;
      if (mediaInfo != null) {
        _mediaInfo = mediaInfo;
      }
    });
  }

  Future<void> _onRequestFailed(String? error) async {
    setState(() => _state = AppState.error);
    print(error);
  }
}

class _RoundIconButton extends StatelessWidget {
  final IconData icon;
  final VoidCallback onPressed;

  const _RoundIconButton({required this.icon, required this.onPressed});

  @override
  Widget build(BuildContext context) {
    return ElevatedButton(
      style: ButtonStyle(
        backgroundColor: WidgetStateProperty.all(Colors.blue),
        shape: WidgetStateProperty.all(CircleBorder()),
      ),
      onPressed: onPressed,
      child: Icon(icon, color: Colors.white),
    );
  }
}

enum AppState { idle, connected, mediaLoaded, error }