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A Flutter plugin to play multiple audio files simultaneously

example/lib/main.dart

import 'dart:async';

import 'package:audioplayers/audioplayers.dart';
import 'package:audioplayers_example/components/tabs.dart';
import 'package:audioplayers_example/components/tgl.dart';
import 'package:audioplayers_example/tabs/audio_context.dart';
import 'package:audioplayers_example/tabs/controls.dart';
import 'package:audioplayers_example/tabs/logger.dart';
import 'package:audioplayers_example/tabs/sources.dart';
import 'package:audioplayers_example/tabs/streams.dart';
import 'package:audioplayers_example/utils.dart';
import 'package:flutter/material.dart';

typedef OnError = void Function(Exception exception);

void main() {
  runApp(const MaterialApp(home: ExampleApp()));
}

class ExampleApp extends StatefulWidget {
  const ExampleApp({Key? key}) : super(key: key);

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

class _ExampleAppState extends State<ExampleApp> {
  List<AudioPlayer> players =
      List.generate(4, (_) => AudioPlayer()..setReleaseMode(ReleaseMode.stop));
  int selectedPlayerIdx = 0;

  AudioPlayer get selectedPlayer => players[selectedPlayerIdx];
  List<StreamSubscription> streams = [];

  @override
  void initState() {
    super.initState();
    players.asMap().forEach((index, player) {
      streams.add(
        player.onPlayerComplete.listen(
          (it) => toast(
            'Player complete!',
            textKey: Key('toast-player-complete-$index'),
          ),
        ),
      );
      streams.add(
        player.onSeekComplete.listen(
          (it) => toast(
            'Seek complete!',
            textKey: Key('toast-seek-complete-$index'),
          ),
        ),
      );
    });
  }

  @override
  void dispose() {
    streams.forEach((it) => it.cancel());
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('audioplayers example'),
      ),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Center(
              child: Tgl(
                options: ['P1', 'P2', 'P3', 'P4']
                    .asMap()
                    .map((key, value) => MapEntry('player-$key', value)),
                selected: selectedPlayerIdx,
                onChange: (v) => setState(() => selectedPlayerIdx = v),
              ),
            ),
          ),
          Expanded(
            child: Tabs(
              tabs: [
                TabData(
                  key: 'sourcesTab',
                  label: 'Src',
                  content: SourcesTab(player: selectedPlayer),
                ),
                TabData(
                  key: 'controlsTab',
                  label: 'Ctrl',
                  content: ControlsTab(player: selectedPlayer),
                ),
                TabData(
                  key: 'streamsTab',
                  label: 'Stream',
                  content: StreamsTab(player: selectedPlayer),
                ),
                TabData(
                  key: 'audioContextTab',
                  label: 'Ctx',
                  content: AudioContextTab(player: selectedPlayer),
                ),
                TabData(
                  key: 'loggerTab',
                  label: 'Log',
                  content: const LoggerTab(),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}