audio_manager 0.5.1+1

A flutter plugin for music playback, including notification handling.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:io';

import 'package:flutter/services.dart';
import 'package:audio_manager/audio_manager.dart';
import 'package:path_provider/path_provider.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  bool isPlaying = false;
  Duration _duration;
  Duration _position;
  num _slider;
  String _error;
  num curIndex = 0;
  PlayMode playMode = AudioManager.instance.playMode;

  final list = [
    {
      "title": "Assets",
      "desc": "local assets playback",
      "url": "assets/audio.mp3",
      "cover": "assets/ic_launcher.png"
    },
    {
      "title": "network",
      "desc": "network resouce playback",
      "url": "https://dl.espressif.com/dl/audio/ff-16b-2c-44100hz.m4a",
      "cover":
          "/static/img/pub-dev-logo.svg?hash=40fqenbgtbjcekk60vd5dg5mr22bv99t"
    },
    {
      "title": "file",
      "desc": "local file",
      "url": "test.mp3",
      "cover":
          "https://cdn.jsdelivr.net/gh/flutterchina/website@1.0/images/flutter-mark-square-100.png"
    },
  ];

  @override
  void initState() {
    super.initState();

    initPlatformState();
    setupAudio();
  }

  @override
  void dispose() {
    // 释放所有资源
    AudioManager.instance.stop();
    super.dispose();
  }

  void setupAudio() async {
    List<AudioInfo> list = [];
    this.list.forEach((item) => list.add(AudioInfo(item["url"],
        title: item["title"], desc: item["desc"], coverUrl: item["cover"])));
    final appDocDir = await getApplicationDocumentsDirectory();
    // Please make sure the `test.mp3` exists in the document directory
    final file = File("${appDocDir.path}/test.mp3");
    list.last.url = "file://${file.path}";

    AudioManager.instance.audioList = list;
    AudioManager.instance.intercepter = true;
    AudioManager.instance.play(auto: false);
    // print(AudioManager.instance.info);

    AudioManager.instance.onEvents((events, args) {
      print("$events, $args");
      switch (events) {
        case AudioManagerEvents.ready:
          print("ready to play");
          _position = AudioManager.instance.position;
          _duration = AudioManager.instance.duration;
          setState(() {});
          AudioManager.instance.seekTo(Duration(seconds: 10));
          break;
        case AudioManagerEvents.buffering:
          print("buffering $args");
          break;
        case AudioManagerEvents.playstatus:
          isPlaying = AudioManager.instance.isPlaying;
          setState(() {});
          break;
        case AudioManagerEvents.timeupdate:
          _position = AudioManager.instance.position;
          _slider = _position.inMilliseconds / _duration.inMilliseconds;
          setState(() {});
          AudioManager.instance.updateLrc(args["position"].toString());
          break;
        case AudioManagerEvents.error:
          _error = args;
          setState(() {});
          break;
        case AudioManagerEvents.ended:
          AudioManager.instance.next();
          break;
        default:
          break;
      }
    });
  }

  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await AudioManager.instance.platformVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin audio player'),
        ),
        body: Center(
          child: Column(
            children: <Widget>[
              Text('Running on: $_platformVersion\n'),
              Expanded(
                child: ListView.separated(
                    itemBuilder: (context, index) {
                      return ListTile(
                        title: Text(list[index]["title"],
                            style: TextStyle(fontSize: 18)),
                        subtitle: Text(list[index]["desc"]),
                        onTap: () => AudioManager.instance.play(index: index),
                      );
                    },
                    separatorBuilder: (BuildContext context, int index) =>
                        Divider(),
                    itemCount: list.length),
              ),
              Center(
                  child:
                      Text(_error != null ? _error : "lrc text: $_position")),
              bottomPanel()
            ],
          ),
        ),
      ),
    );
  }

  Widget bottomPanel() {
    return Column(children: <Widget>[
      Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16),
        child: songProgress(context),
      ),
      Container(
        padding: EdgeInsets.symmetric(vertical: 16),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: <Widget>[
            IconButton(
                icon: getPlayModeIcon(playMode),
                onPressed: () {
                  playMode = AudioManager.instance.nextMode();
                  setState(() {});
                }),
            IconButton(
                iconSize: 36,
                icon: Icon(
                  Icons.skip_previous,
                  color: Colors.black,
                ),
                onPressed: () => AudioManager.instance.previous()),
            IconButton(
              onPressed: () async {
                String status = await AudioManager.instance.playOrPause();
                print("await -- $status");
              },
              padding: const EdgeInsets.all(0.0),
              icon: Icon(
                isPlaying ? Icons.pause : Icons.play_arrow,
                size: 48.0,
                color: Colors.black,
              ),
            ),
            IconButton(
                tooltip: "下一曲",
                iconSize: 36,
                icon: Icon(
                  Icons.skip_next,
                  color: Colors.black,
                ),
                onPressed: () => AudioManager.instance.next()),
            IconButton(
                tooltip: "当前播放列表",
                icon: Icon(
                  Icons.menu,
                  color: Colors.black,
                ),
                onPressed: () {
                  print("click menu");
                }),
          ],
        ),
      ),
    ]);
  }

  Widget getPlayModeIcon(PlayMode playMode) {
    switch (playMode) {
      case PlayMode.sequence:
        return Icon(
          Icons.repeat,
          color: Colors.black,
        );
      case PlayMode.shuffle:
        return Icon(
          Icons.shuffle,
          color: Colors.black,
        );
      case PlayMode.single:
        return Icon(
          Icons.repeat_one,
          color: Colors.black,
        );
    }
    return Container();
  }

  Widget songProgress(BuildContext context) {
    var style = TextStyle(color: Colors.black);
    return Row(
      children: <Widget>[
        Text(
          _formatDuration(_position),
          style: style,
        ),
        Expanded(
          child: Padding(
            padding: EdgeInsets.symmetric(horizontal: 5),
            child: SliderTheme(
                data: SliderTheme.of(context).copyWith(
                  trackHeight: 2,
                  thumbColor: Colors.blueAccent,
                  overlayColor: Colors.blue,
                  thumbShape: RoundSliderThumbShape(
                    disabledThumbRadius: 5,
                    enabledThumbRadius: 5,
                  ),
                  overlayShape: RoundSliderOverlayShape(
                    overlayRadius: 10,
                  ),
                  activeTrackColor: Colors.blueAccent,
                  inactiveTrackColor: Colors.grey,
                ),
                child: Slider(
                  value: _slider ?? 0,
                  onChanged: (value) {
                    setState(() {
                      _slider = value;
                    });
                  },
                  onChangeEnd: (value) {
                    if (_duration != null) {
                      Duration msec = Duration(
                          milliseconds:
                              (_duration.inMilliseconds * value).round());
                      AudioManager.instance.seekTo(msec);
                    }
                  },
                )),
          ),
        ),
        Text(
          _formatDuration(_duration),
          style: style,
        ),
      ],
    );
  }

  String _formatDuration(Duration d) {
    if (d == null) return "--:--";
    int minute = d.inMinutes;
    int second = (d.inSeconds > 60) ? (d.inSeconds % 60) : d.inSeconds;
    String format = ((minute < 10) ? "0$minute" : "$minute") +
        ":" +
        ((second < 10) ? "0$second" : "$second");
    return format;
  }
}