347 lines
12 KiB
Dart
347 lines
12 KiB
Dart
import 'dart:math';
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import 'package:flutter/material.dart';
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import 'package:just_audio/just_audio.dart';
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import 'package:rxdart/rxdart.dart';
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void main() => runApp(MyApp());
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class MyApp extends StatefulWidget {
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@override
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_MyAppState createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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final _volumeSubject = BehaviorSubject.seeded(1.0);
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final _speedSubject = BehaviorSubject.seeded(1.0);
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AudioPlayer _player;
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ConcatenatingAudioSource _playlist = ConcatenatingAudioSource(children: [
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LoopingAudioSource(
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count: 2,
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child: ClippingAudioSource(
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start: Duration(seconds: 60),
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end: Duration(seconds: 65),
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child: AudioSource.uri(Uri.parse(
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"https://s3.amazonaws.com/scifri-episodes/scifri20181123-episode.mp3")),
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tag: AudioMetadata(
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album: "Science Friday",
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title: "A Salute To Head-Scratching Science (5 seconds)",
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),
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),
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),
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//LoopingAudioSource(
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// count: 2,
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// child: AudioSource.uri(
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// Uri.parse(
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// "https://s3.amazonaws.com/scifri-episodes/scifri20181123-episode.mp3"),
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// tag: AudioMetadata(
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// album: "Science Friday",
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// title: "A Salute To Head-Scratching Science (full)",
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// ),
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// ),
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//),
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//ClippingAudioSource(
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// start: Duration(seconds: 60),
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// end: Duration(seconds: 65),
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// child: AudioSource.uri(Uri.parse(
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// "https://s3.amazonaws.com/scifri-episodes/scifri20181123-episode.mp3")),
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// tag: AudioMetadata(
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// album: "Science Friday",
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// title: "A Salute To Head-Scratching Science (5 seconds)",
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// ),
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//),
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AudioSource.uri(
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Uri.parse(
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"https://s3.amazonaws.com/scifri-episodes/scifri20181123-episode.mp3"),
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tag: AudioMetadata(
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album: "Science Friday",
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title: "A Salute To Head-Scratching Science (full)",
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),
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),
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AudioSource.uri(
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Uri.parse("https://s3.amazonaws.com/scifri-segments/scifri201711241.mp3"),
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tag: AudioMetadata(
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album: "Science Friday",
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title: "From Cat Rheology To Operatic Incompetence",
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),
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),
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]);
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List<IndexedAudioSource> get _sequence => _playlist.sequence;
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List<AudioMetadata> get _metadataSequence =>
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_sequence.map((s) => s.tag as AudioMetadata).toList();
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@override
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void initState() {
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super.initState();
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AudioPlayer.setIosCategory(IosCategory.playback);
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_player = AudioPlayer();
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_loadAudio();
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}
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_loadAudio() async {
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try {
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await _player.load(_playlist);
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} catch (e) {
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// catch audio error ex: 404 url, wrong url ...
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print("$e");
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}
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}
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@override
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void dispose() {
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_player.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Audio Player Demo'),
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),
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body: Center(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.center,
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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StreamBuilder<int>(
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stream: _player.currentIndexStream,
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builder: (context, snapshot) {
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final index = snapshot.data ?? 0;
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final metadata = _metadataSequence[index];
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return Column(
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crossAxisAlignment: CrossAxisAlignment.center,
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children: [
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Text(metadata.album ?? '',
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style: Theme.of(context).textTheme.headline6),
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Text(metadata.title ?? ''),
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],
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);
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},
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),
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StreamBuilder<FullAudioPlaybackState>(
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stream: _player.fullPlaybackStateStream,
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builder: (context, snapshot) {
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final fullState = snapshot.data;
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final state = fullState?.state;
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final buffering = fullState?.buffering;
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return Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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if (state == AudioPlaybackState.connecting ||
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buffering == true)
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Container(
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margin: EdgeInsets.all(8.0),
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width: 64.0,
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height: 64.0,
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child: CircularProgressIndicator(),
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)
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else if (state == AudioPlaybackState.playing)
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IconButton(
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icon: Icon(Icons.pause),
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iconSize: 64.0,
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onPressed: _player.pause,
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)
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else
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IconButton(
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icon: Icon(Icons.play_arrow),
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iconSize: 64.0,
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onPressed: _player.play,
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),
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IconButton(
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icon: Icon(Icons.stop),
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iconSize: 64.0,
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onPressed: state == AudioPlaybackState.stopped ||
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state == AudioPlaybackState.none
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? null
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: _player.stop,
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),
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],
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);
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},
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),
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Text("Track position"),
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StreamBuilder<Duration>(
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stream: _player.durationStream,
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builder: (context, snapshot) {
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final duration = snapshot.data ?? Duration.zero;
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return StreamBuilder<Duration>(
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stream: _player.getPositionStream(),
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builder: (context, snapshot) {
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var position = snapshot.data ?? Duration.zero;
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if (position > duration) {
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position = duration;
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}
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return SeekBar(
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duration: duration,
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position: position,
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onChangeEnd: (newPosition) {
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_player.seek(newPosition);
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},
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);
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},
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);
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},
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),
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Text("Volume"),
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StreamBuilder<double>(
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stream: _volumeSubject.stream,
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builder: (context, snapshot) => Slider(
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divisions: 20,
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min: 0.0,
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max: 2.0,
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value: snapshot.data ?? 1.0,
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onChanged: (value) {
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_volumeSubject.add(value);
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_player.setVolume(value);
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},
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),
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),
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Text("Speed"),
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StreamBuilder<double>(
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stream: _speedSubject.stream,
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builder: (context, snapshot) => Slider(
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divisions: 10,
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min: 0.5,
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max: 1.5,
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value: snapshot.data ?? 1.0,
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onChanged: (value) {
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_speedSubject.add(value);
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_player.setSpeed(value);
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},
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),
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),
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Row(
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children: [
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StreamBuilder<LoopMode>(
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stream: _player.loopModeStream,
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builder: (context, snapshot) {
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final loopMode = snapshot.data ?? LoopMode.off;
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const icons = [
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Icon(Icons.repeat, color: Colors.grey),
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Icon(Icons.repeat, color: Colors.orange),
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Icon(Icons.repeat_one, color: Colors.orange),
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];
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const cycleModes = [
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LoopMode.off,
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LoopMode.all,
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LoopMode.one,
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];
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final index = cycleModes.indexOf(loopMode);
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return IconButton(
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icon: icons[index],
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onPressed: () {
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_player.setLoopMode(cycleModes[
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(cycleModes.indexOf(loopMode) + 1) %
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cycleModes.length]);
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},
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);
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},
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),
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Expanded(
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child: Text(
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"Playlist",
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style: Theme.of(context).textTheme.headline6,
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textAlign: TextAlign.center,
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),
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),
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StreamBuilder<bool>(
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stream: _player.shuffleModeEnabledStream,
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builder: (context, snapshot) {
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final shuffleModeEnabled = snapshot.data ?? false;
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return IconButton(
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icon: shuffleModeEnabled
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? Icon(Icons.shuffle, color: Colors.orange)
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: Icon(Icons.shuffle, color: Colors.grey),
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onPressed: () {
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_player.setShuffleModeEnabled(!shuffleModeEnabled);
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},
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);
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},
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),
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],
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),
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Expanded(
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child: StreamBuilder<int>(
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stream: _player.currentIndexStream,
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builder: (context, snapshot) {
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final currentIndex = snapshot.data ?? 0;
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return ListView.builder(
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itemCount: _metadataSequence.length,
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itemBuilder: (context, index) => Material(
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color:
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index == currentIndex ? Colors.grey.shade300 : null,
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child: ListTile(
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title: Text(_metadataSequence[index].title),
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onTap: () {
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_player.seek(Duration.zero, index: index);
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},
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),
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),
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);
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},
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),
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),
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],
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),
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),
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),
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);
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}
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}
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class SeekBar extends StatefulWidget {
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final Duration duration;
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final Duration position;
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final ValueChanged<Duration> onChanged;
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final ValueChanged<Duration> onChangeEnd;
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SeekBar({
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@required this.duration,
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@required this.position,
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this.onChanged,
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this.onChangeEnd,
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});
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@override
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_SeekBarState createState() => _SeekBarState();
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}
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class _SeekBarState extends State<SeekBar> {
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double _dragValue;
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@override
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Widget build(BuildContext context) {
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return Slider(
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min: 0.0,
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max: widget.duration.inMilliseconds.toDouble(),
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value: min(_dragValue ?? widget.position.inMilliseconds.toDouble(),
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widget.duration.inMilliseconds.toDouble()),
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onChanged: (value) {
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setState(() {
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_dragValue = value;
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});
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if (widget.onChanged != null) {
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widget.onChanged(Duration(milliseconds: value.round()));
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}
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},
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onChangeEnd: (value) {
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_dragValue = null;
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if (widget.onChangeEnd != null) {
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widget.onChangeEnd(Duration(milliseconds: value.round()));
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}
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},
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);
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}
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}
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class AudioMetadata {
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final String album;
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final String title;
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AudioMetadata({this.album, this.title});
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}
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