【Flutter】使用flutter_sound进行录音、语音播放及录音时动画处理

Posted 2023-05-13

参考技术A 使用第三方flutter_sound: https://pub.dev/packages/flutter_sound

Flutter - 录制语音并将其上传到 firebase

【中文标题】Flutter - 录制语音并将其上传到 firebase

【英文标题】：Flutter - Record voice and upload it to firebase

【发布时间】：2020-04-12 08:24:17

【问题描述】：

我使用flutter_sound 录制音频并使用firebase_storage 上传。

录制由以下两个功能管理：

  void startRecording() async 
    result = await flutterSound.startRecorder(null);
    aname = result;
    print('startRecorder: $result');

    _recorderSubscription = flutterSound.onRecorderStateChanged.listen((e) 
      if(e  != null) 
        DateTime date = new DateTime.fromMillisecondsSinceEpoch(e.currentPosition.toInt());
        String txt = DateFormat('mm:ss:SS', 'en_US').format(date);
      
    );
  

  void stopRecording() async 
    if(flutterSound.isRecording) result = await flutterSound.stopRecorder();
  

打印语句打印以下内容：

I/flutter (11507): startRecorder: /data/user/0/com.example.appx/app_flutter/null
I/flutter (11507): stopRecorder: /data/user/0/com.example.appx/app_flutter/null

上传应该通过这个代码来完成：

  var uuid = Uuid();
  String aname = uuid.v4();
  final StorageReference storageRef = FirebaseStorage.instance.ref().child('recordings');
  final StorageUploadTask uploadTask = storageRef.putFile(
    File(aname),
    StorageMetadata(
      contentType: 'audio/aac',
    ),
  );
  final StorageTaskSnapshot downloadUrl = (await uploadTask.onComplete);
  final String url = (await downloadUrl.ref.getDownloadURL());

但是当我尝试获取 URL 时出现以下错误：

Running Gradle task 'assembleProfile'...                                
E/flutter (11507): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(download_error, The operation retry limit has been exceeded., null)
E/flutter (11507): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:569)
E/flutter (11507): #1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:321)     
E/flutter (11507): <asynchronous suspension>                                                                       
E/flutter (11507): #2      StorageReference.getDownloadURL (package:firebase_storage/src/storage_reference.dart:142)
E/flutter (11507): #3      updateUserAlert (package:electroshoex/utils.dart:58)                                    
E

任何帮助将不胜感激。谢谢你。 :)

【问题讨论】：

你解决了吗？

@Gauranga Nope.

【参考方案1】：

试试这个方法 初始化录音机插件的实例...

Recording _recording;
StorageReference storageReference =
    FirebaseStorage.instance.ref().child('Recordings');

final StorageUploadTask uploadTask = storageReference.putFile(
    File(_recording.path), StorageMetadata(contentType: 'audio/wav'));

将 _recording.path 作为字符串添加到 firebase 的 putFile 方法中，并记得最后向 StorageMetaData 添加内容类型属性，建议在物理设备上运行它，这样 firebase 会自动获取当前用户数据.