如何从文件管理器打开音频文件并使用 Flutter 应用程序播放该音频文件

Question

我是 flutter 开发的新手，我被困在一个程序中，我想通过从文件中选择它来播放音频文件 manager.i 我可以从文件管理器中打开音频文件，但我没有不知道如何播放该音频文件。这个你能帮我吗。我正在使用此代码 -

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

class FilePickerDemo extends StatefulWidget {
@override
_FilePickerDemoState createState() => _FilePickerDemoState();
}

I am using this for file picking and save file I want to know how to play save file

class _FilePickerDemoState extends State<FilePickerDemo> {
void _pickFiles() async {
_resetState();
try {
  _directoryPath = null;
  _paths = (await FilePicker.platform.pickFiles(
    type: _pickingType,
    allowMultiple: _multiPick,
    onFileLoading: (FilePickerStatus status) => print(status),
    allowedExtensions: ['mp3'],
  ))
      ?.files;
} on PlatformException catch (e) {
  _logException('Unsupported operation' + e.toString());
} catch (e) {
  _logException(e.toString());
}
if (!mounted) return;
setState(() {
  _isLoading = false;
  _fileName =
  _paths != null ? _paths!.map((e) => e.name).toString() : '...';
  _userAborted = _paths == null;
});
}

Answer 1

您可以使用 https://pub.dev/packages/just_audio 包来播放音频。

import 'package:just_audio/just_audio.dart';

final _player = AudioPlayer();
    

playAudio() async {
    try {
      await _player.setFilePath(widget.audioPath);
    } catch (e) {
      log("Error loading audio source: $e");
    }
    _player.play();
  }

Answer 2

另一个方便的软件包是 AudioPlayers，它也可以缓存本地音频文件。

这是一个非常基本的示例，其中包含用于播放、暂停和停止对传递到有状态小部件的本地音频的引用的按钮，以帮助您入门（主要基于这篇 Medium 文章）Medium Article

提醒将音频保存在本地文件中，如下所示

并在您的 yaml 文件中添加引用并获取依赖项

  assets:
    - assets/audio/

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

class AudioManagerExample extends StatefulWidget {
  const AudioManagerExample({required this.audioName, Key? key}) : super(key: key);

  final String audioName;

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

class _AudioManagerExampleState extends State<AudioManagerExample> {
  AudioPlayer audioPlayer = AudioPlayer();
  late AudioCache audioCache;

  @override
  void initState() {
    audioCache = AudioCache(fixedPlayer: audioPlayer);
    audioCache.load('audio/${widget.audioName}.mp3');
    super.initState();
  }

  @override
  void dispose() {
    audioCache.clearAll();
    audioPlayer.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        ElevatedButton(
          onPressed: () {
            setState(() {
              audioCache.play('audio/${widget.audioName}.mp3');
            });
          },
          child: Text('Play ${widget.audioName}'),
        ),
        ElevatedButton(
          onPressed: () {
            setState(() {
              audioPlayer.pause();
            });
          },
          child: Text('Pause ${widget.audioName}'),
        ),
        ElevatedButton(
          onPressed: () {
            setState(() {
              audioPlayer.stop();
            });
          },
          child: Text('Stop ${widget.audioName}'),
        ),
      ],
    );
  }
}

如何从文件管理器打开音频文件并使用 Flutter 应用程序播放该音频文件

How to open audio file from file manager and play that audio file using Flutter app

audio-player

flutter