Flutter音频时长获取插件audio_duration的使用

audio_duration 是一个简单的 Flutter 插件，用于获取任何音频文件（如 mp3）的时长，单位为毫秒。

如何使用

首先，在 pubspec.yaml 文件中添加依赖：

dependencies:
  audio_duration: ^1.0.0

然后在 Dart 代码中导入并使用插件：

import 'package:audio_duration/audio_duration.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Audio Duration Example'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: () async {
              // 模拟音频文件路径
              String filePath = "./path/to/the/file.mp3";
              int? durationInMilliseconds = await AudioDuration.getAudioDuration(filePath);
              print("Duration: $durationInMilliseconds ms");
            },
            child: Text('Get Audio Duration'),
          ),
        ),
      ),
    );
  }
}

动机

我需要一个包来在我的个人 Android 应用中获取音频时长。但我在现有的包中没有找到能满足需求的，所以我就创建了这个包。

目前，该插件仅支持 Android。由于我没有 Mac 或 iOS 设备，因此暂时不支持这些平台。不过，欢迎提交 Pull Request。但在提交之前，请先创建一个 Issue。谢谢！

许可证

MIT License

Copyright (c) 2020 Fayaz Bin Salam

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

完整示例代码

以下是一个完整的示例代码，展示了如何使用 audio_duration 插件从用户选择的多个音频文件中获取时长：

import 'dart:io';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:audio_duration/audio_duration.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _audioDurations = '...';

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.center,
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(_audioDurations),
                ElevatedButton(
                  onPressed: () async {
                    FilePickerResult? result = await FilePicker.platform.pickFiles(
                      allowMultiple: true,
                      type: FileType.audio,
                    );

                    if (result != null) {
                      List<File> files = result.paths.map((path) => File(path!)).toList();
                      List<String> urls = files.map((e) {
                        String path = e.uri.toFilePath();
                        return path;
                      }).toList();
                      urls.sort((a, b) => a.compareTo(b));

                      var finalText = "";
                      for (var i = 0; i < urls.length; i++) {
                        var duration = await AudioDuration.getAudioDuration(urls[i]);
                        finalText += "${urls[i]} - ${duration!}\n";
                      }

                      setState(() {
                        _audioDurations = finalText;
                      });
                    }
                  },
                  child: const Text("Pick files"),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

在这个示例中，用户可以通过点击按钮选择多个音频文件，然后应用会显示每个文件的路径及其对应的时长。希望这个示例对你有帮助！