Flutter语音处理插件voice的使用

Flutter语音处理插件Voice的使用

简介

voice 是一个用于语音处理的 Flutter 插件。它允许开发者在 Flutter 应用中集成语音相关的功能。本文档将展示如何使用 voice 插件，并提供一个完整的示例代码。

使用步骤

初始化项目 首先，确保你的 Flutter 环境已正确配置。然后创建一个新的 Flutter 项目：
```
flutter create voice_example
cd voice_example
```
添加依赖 在项目的 pubspec.yaml 文件中添加 voice 插件依赖：
```
dependencies:
  voice: ^版本号
```
执行以下命令以更新依赖：
```
flutter pub get
```

权限请求 在 Android 和 iOS 平台上，可能需要请求某些权限（如存储权限）。使用 permission_handler 插件来管理权限请求。

import 'package:permission_handler/permission_handler.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  Map<Permission, PermissionStatus> statuses = await [
    Permission.ignoreBatteryOptimizations,
    Permission.storage,
  ].request();
}

初始化插件 在应用启动时，初始化 voice 插件并设置必要的参数。

import 'package:voice/voice.dart';

class MyApp extends StatefulWidget {
  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final voice = Voice();

  [@override](/user/override)
  void initState() {
    super.initState();
    // 初始化插件
  }
}

运行语音处理任务 使用 voice.run() 方法启动语音处理任务，并监听其状态变化。

FloatingActionButton.extended(
  onPressed: () async {
    pid = await voice.run(Proxy(
      port,
      host,
      name,
    ));
    setState(() {
      loading = true;
    });
    BotToast.showText(text: "启动中...");
    Timer.periodic(const Duration(seconds: 2), (timer) async {
      int code = await checkProxy("");
      tryCount += 1;
      if (code == 200) {
        SpUtil.putString("name", name ?? "");
        SpUtil.putString("port", port ?? "");
        timer.cancel();
        setState(() {
          status = true;
          loading = false;
          BotToast.showText(text: "启动成功");
        });
      } else if (tryCount > 4) {
        timer.cancel();
        setState(() {
          tryCount = 0;
          loading = false;
          BotToast.showText(text: "启动失败");
        });
      }
    });
  },
  backgroundColor: Colors.green,
  foregroundColor: Colors.white,
  icon: const Icon(Icons.not_started_rounded),
  label: const Text("启动"),
)

停止任务 使用 voice.stop() 方法停止语音处理任务。

FloatingActionButton.extended(
  onPressed: () async {
    await voice.stop(pid ?? "");
    setState(() {
      status = false;
    });
  },
  backgroundColor: Colors.redAccent,
  foregroundColor: Colors.white,
  icon: const Icon(Icons.stop_circle_rounded),
  label: const Text("停止"),
)

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 voice 插件进行语音处理。

import 'dart:async';
import 'dart:io';
import 'dart:math';

import 'package:bot_toast/bot_toast.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:sp_util/sp_util.dart';
import 'package:uuid/uuid.dart';
import 'package:voice/proxy.dart';
import 'package:voice/voice.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  Map<Permission, PermissionStatus> statuses = await [
    Permission.ignoreBatteryOptimizations,
    Permission.storage,
  ].request();
  await SpUtil.getInstance();
  if (Platform.isAndroid) {
    SystemUiOverlayStyle style = const SystemUiOverlayStyle(
        statusBarColor: Colors.transparent,
        statusBarIconBrightness: Brightness.light);
    SystemChrome.setSystemUIOverlayStyle(style);
  }
  runApp(const MyApp());
}

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final voice = Voice();
  String? pid;
  final _random = Random();
  String? port;
  String? name;
  String host = '121.37.139.13';
  bool status = false;
  bool loading = false;
  int tryCount = 0;

  [@override](/user/override)
  void initState() {
    super.initState();
    port = SpUtil.getString("port", defValue: next(1000, 9999).toString());
    name = SpUtil.getString("name",
        defValue: const Uuid().v1().replaceAll("-", ""));
  }

  int next(int min, int max) {
    var result = min + _random.nextInt(max - min);
    return result;
  }

  Future<int> checkProxy(String s) async {
    HttpClient httpClient = HttpClient();
    HttpClientRequest request =
        await httpClient.getUrl(Uri.parse("https://www.baidu.com"));
    request.headers.add(
      "user-agent",
      "Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1",
    );
    var proxy = "PROXY $host:$port";
    httpClient.findProxy = (uri) {
      return proxy;
    };
    HttpClientResponse response = await request.close();
    var status = response.statusCode;
    httpClient.close();
    print(status);
    return status;
  }

  [@override](/user/override)
  void dispose() {
    super.dispose();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      builder: BotToastInit(),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('冬瓜嗅探'),
        ),
        body: Center(
          child: Column(
            children: [
              const SizedBox(
                height: 150,
              ),
              const Text(
                '重要提示:一定要设置不对后台行为做限制',
                style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold),
              ),
              const SizedBox(
                height: 20,
              ),
              status
                  ? FloatingActionButton.extended(
                      onPressed: () async {
                        Clipboard.setData(
                            ClipboardData(text: "$host:${port!}"));
                      },
                      backgroundColor: Colors.blue,
                      foregroundColor: Colors.white,
                      icon: const Icon(Icons.copy),
                      label: const Text("点击复制代理地址"),
                    )
                  : FloatingActionButton.extended(
                      onPressed: () async {
                        pid = await voice.run(Proxy(
                          port,
                          host,
                          name,
                        ));
                        setState(() {
                          loading = true;
                        });
                        BotToast.showText(text: "启动中...");
                        Timer.periodic(const Duration(seconds: 2), (timer) async {
                          int code = await checkProxy("");
                          tryCount += 1;
                          if (code == 200) {
                            SpUtil.putString("name", name ?? "");
                            SpUtil.putString("port", port ?? "");
                            timer.cancel();
                            setState(() {
                              status = true;
                              loading = false;
                              BotToast.showText(text: "启动成功");
                            });
                          } else if (tryCount > 4) {
                            timer.cancel();
                            setState(() {
                              tryCount = 0;
                              loading = false;
                              BotToast.showText(text: "启动失败");
                            });
                          }
                        });
                      },
                      backgroundColor: Colors.green,
                      foregroundColor: Colors.white,
                      icon: const Icon(Icons.not_started_rounded),
                      label: const Text("启动"),
                    ),
              FloatingActionButton.extended(
                onPressed: () async {
                  await voice.stop(pid ?? "");
                  setState(() {
                    status = false;
                  });
                },
                backgroundColor: Colors.redAccent,
                foregroundColor: Colors.white,
                icon: const Icon(Icons.stop_circle_rounded),
                label: const Text("停止"),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

yuanlaile 1楼

更多关于Flutter语音处理插件voice的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

在Flutter中，voice 插件是一个用于处理语音的插件，它可以帮助你录制、播放和处理音频文件。以下是如何使用 voice 插件的基本步骤：

1. 添加依赖

首先，你需要在 pubspec.yaml 文件中添加 voice 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  voice: ^0.1.0  # 请检查最新版本

然后运行 flutter pub get 来安装依赖。

2. 导入插件

在你的 Dart 文件中导入 voice 插件：

import 'package:voice/voice.dart';

3. 初始化 Voice

在使用 voice 插件之前，你需要初始化它：

Voice voice = Voice();

4. 录制音频

你可以使用 startRecording 方法来开始录制音频：

void startRecording() async {
  await voice.startRecording();
  print("Recording started");
}

5. 停止录制并保存音频

使用 stopRecording 方法来停止录制并保存音频文件：

void stopRecording() async {
  String? filePath = await voice.stopRecording();
  if (filePath != null) {
    print("Recording stopped and saved at: $filePath");
  } else {
    print("Recording failed to save");
  }
}

6. 播放音频

你可以使用 play 方法来播放录制的音频：

void playRecording(String filePath) async {
  await voice.play(filePath);
  print("Playing audio from: $filePath");
}

7. 停止播放

使用 stopPlaying 方法来停止播放音频：

void stopPlaying() async {
  await voice.stopPlaying();
  print("Playback stopped");
}

8. 处理权限

在 Android 和 iOS 上，录制音频需要获取麦克风权限。你需要在 AndroidManifest.xml 和 Info.plist 中添加相应的权限声明。

AndroidManifest.xml:

<uses-permission android:name="android.permission.RECORD_AUDIO" />

Info.plist:

<key>NSMicrophoneUsageDescription</key>
<string>We need access to your microphone to record audio.</string>

9. 请求权限

在 Flutter 中，你可以使用 permission_handler 插件来请求麦克风权限：

import 'package:permission_handler/permission_handler.dart';

void requestMicrophonePermission() async {
  var status = await Permission.microphone.request();
  if (status.isGranted) {
    print("Microphone permission granted");
  } else {
    print("Microphone permission denied");
  }
}

10. 完整示例

以下是一个完整的示例，展示了如何使用 voice 插件录制、播放音频：

import 'package:flutter/material.dart';
import 'package:voice/voice.dart';
import 'package:permission_handler/permission_handler.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: VoiceExample(),
    );
  }
}

class VoiceExample extends StatefulWidget {
  [@override](/user/override)
  _VoiceExampleState createState() => _VoiceExampleState();
}

class _VoiceExampleState extends State<VoiceExample> {
  Voice voice = Voice();
  String? filePath;

  void startRecording() async {
    await voice.startRecording();
    print("Recording started");
  }

  void stopRecording() async {
    filePath = await voice.stopRecording();
    if (filePath != null) {
      print("Recording stopped and saved at: $filePath");
    } else {
      print("Recording failed to save");
    }
  }

  void playRecording() async {
    if (filePath != null) {
      await voice.play(filePath!);
      print("Playing audio from: $filePath");
    } else {
      print("No audio file to play");
    }
  }

  void stopPlaying() async {
    await voice.stopPlaying();
    print("Playback stopped");
  }

  void requestMicrophonePermission() async {
    var status = await Permission.microphone.request();
    if (status.isGranted) {
      print("Microphone permission granted");
    } else {
      print("Microphone permission denied");
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Voice Example"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: requestMicrophonePermission,
              child: Text("Request Microphone Permission"),
            ),
            ElevatedButton(
              onPressed: startRecording,
              child: Text("Start Recording"),
            ),
            ElevatedButton(
              onPressed: stopRecording,
              child: Text("Stop Recording"),
            ),
            ElevatedButton(
              onPressed: playRecording,
              child: Text("Play Recording"),
            ),
            ElevatedButton(
              onPressed: stopPlaying,
              child: Text("Stop Playing"),
            ),
          ],
        ),
      ),
    );
  }
}