Failed to open a playlist

[BEN425]

Version

Flutter: 3.0.5
file_picker: 5.0.1
assets_audio_player: 3.0.5

Platform

Android 12 64-bit ZenFone 8 Flip (ASUS I004D)

Description

The player can open a audio file and play it normally. However, an error occurs when the player opens a playlist.

Error

W/System.err(13498): com.github.florent37.assets_audio_player.playerimplem.PlayerFinder$NoPlayerFoundException
W/System.err(13498):    at com.github.florent37.assets_audio_player.playerimplem.PlayerFinder._findWorkingPlayer(PlayerFinder.kt:70)
W/System.err(13498):    at com.github.florent37.assets_audio_player.playerimplem.PlayerFinder._findWorkingPlayer(PlayerFinder.kt:88)
W/System.err(13498):    at com.github.florent37.assets_audio_player.playerimplem.PlayerFinder.access$_findWorkingPlayer(PlayerFinder.kt:26)
W/System.err(13498):    at com.github.florent37.assets_audio_player.playerimplem.PlayerFinder$_findWorkingPlayer$1.invokeSuspend(Unknown Source:15)
W/System.err(13498):    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
W/System.err(13498):    at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
W/System.err(13498):    at android.os.Handler.handleCallback(Handler.java:938)
W/System.err(13498):    at android.os.Handler.dispatchMessage(Handler.java:99)
W/System.err(13498):    at android.os.Looper.loopOnce(Looper.java:241)
W/System.err(13498):    at android.os.Looper.loop(Looper.java:358)
W/System.err(13498):    at android.app.ActivityThread.main(ActivityThread.java:8006)
W/System.err(13498):    at java.lang.reflect.Method.invoke(Native Method)
W/System.err(13498):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
W/System.err(13498):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1009)
I/flutter (13498): PlatformException(OPEN, null, null, null)
E/flutter (13498): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: PlatformException(OPEN, null, null, null)
E/flutter (13498):

Code

Here's a simple code to reproduct the error. Run the app and press the button at bottom right corner, then pick a directory with audio files in it. If I remove the code await _audioPlayer.open(Playlist(...));, the error will not appear.

import 'dart:io';

import 'package:assets_audio_player/assets_audio_player.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(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> {
  final _audioPlayer = AssetsAudioPlayer();
  String _text = '';

  void _onButtonPressed() async {
    // Pick a directory
    String? direPath = await FilePicker.platform.getDirectoryPath();
    if (direPath == null) return;

    // Get all audio files from the directory
    final directory = await Directory(direPath)
        .list(recursive: false, followLinks: false)
        .toList();
    final audios = <Audio>[]; // playlist
    for (var element in directory) {
      final path = element.uri.toString();
      if (path.endsWith('.mp3') && element is File) audios.add(Audio(path));
    }

    // Open the playlist
    await _audioPlayer.open(Playlist(audios: audios), autoStart: true, loopMode: LoopMode.playlist);
    debugPrintThrottled('Completed');

    setState(() {
      _text = direPath;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'Directory:',
            ),
            Text(
              '$_text',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _onButtonPressed,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}