sound_recorder 0.0.2

Flutter plugin that can support audio recording and level metering.

example/lib/main.dart

import 'dart:async';
import 'dart:io' as io;

import 'package:audioplayers/audioplayers.dart';
import 'package:file/file.dart';
import 'package:file/local.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:path_provider/path_provider.dart';
import 'package:sound_recorder/sound_recorder.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setEnabledSystemUIOverlays([]);
  return runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: SafeArea(
          child: RecorderExample(),
        ),
      ),
    );
  }
}

class RecorderExample extends StatefulWidget {
  final LocalFileSystem localFileSystem;

  RecorderExample({localFileSystem})
      : this.localFileSystem = localFileSystem ?? LocalFileSystem();

  @override
  State<StatefulWidget> createState() => RecorderExampleState();
}

class RecorderExampleState extends State<RecorderExample> {
  SoundRecorder _recorder;
  Recording _current;
  RecordingStatus _currentStatus = RecordingStatus.Unset;

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

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Padding(
        padding: EdgeInsets.all(8.0),
        child:
            Column(mainAxisAlignment: MainAxisAlignment.spaceAround, children: <
                Widget>[
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: TextButton(
                  onPressed: () {
                    switch (_currentStatus) {
                      case RecordingStatus.Initialized:
                        {
                          _start();
                          break;
                        }
                      case RecordingStatus.Recording:
                        {
                          _pause();
                          break;
                        }
                      case RecordingStatus.Paused:
                        {
                          _resume();
                          break;
                        }
                      case RecordingStatus.Stopped:
                        {
                          _init();
                          break;
                        }
                      default:
                        break;
                    }
                  },
                  child: _buildText(_currentStatus),
                  style: TextButton.styleFrom(backgroundColor: Colors.lightBlue),
                ),
              ),
              TextButton(
                onPressed:
                    _currentStatus != RecordingStatus.Unset ? _stop : null,
                child: Text("Stop", style: TextStyle(color: Colors.white)),
                style: TextButton.styleFrom(
                    backgroundColor: Colors.blueAccent.withOpacity(0.5)),
              ),
              SizedBox(
                width: 8,
              ),
              TextButton(
                onPressed: onPlayAudio,
                child: Text("Play", style: TextStyle(color: Colors.white)),
                style: TextButton.styleFrom(
                    backgroundColor: Colors.blueAccent.withOpacity(0.5)),
              ),
            ],
          ),
          Text("Status : $_currentStatus"),
          Text('Avg Power: ${_current?.metering?.averagePower}'),
          Text('Peak Power: ${_current?.metering?.peakPower}'),
          Text("File path of the record: ${_current?.path}"),
          Text("Format: ${_current?.audioFormat}"),
          Text("isMeteringEnabled: ${_current?.metering?.isMeteringEnabled}"),
          Text("Extension : ${_current?.extension}"),
          Text("Audio recording duration : ${_current?.duration.toString()}")
        ]),
      ),
    );
  }

  _init() async {
    try {
      if (await SoundRecorder.hasPermissions) {
        String customPath = '/flutter_audio_recorder_';
        io.Directory appDocDirectory;
//        io.Directory appDocDirectory = await getApplicationDocumentsDirectory();
        if (io.Platform.isIOS) {
          appDocDirectory = await getApplicationDocumentsDirectory();
        } else {
          appDocDirectory = await getExternalStorageDirectory();
        }

        // can add extension like ".mp4" ".wav" ".m4a" ".aac"
        customPath = appDocDirectory.path +
            customPath +
            DateTime.now().millisecondsSinceEpoch.toString();

        // .wav <---> AudioFormat.WAV
        // .mp4 .m4a .aac <---> AudioFormat.AAC
        // AudioFormat is optional, if given value, will overwrite path extension when there is conflicts.
        _recorder = SoundRecorder(customPath, audioFormat: AudioFormat.WAV);

        await _recorder.initialized;
        // after initialization
        var current = await _recorder.current(channel: 0);
        print(current);
        // should be "Initialized", if all working fine
        setState(() {
          _current = current;
          _currentStatus = current.status;
          print(_currentStatus);
        });
      } else {
        ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text("You must accept permissions")));
      }
    } catch (e) {
      print(e);
    }
  }

  _start() async {
    try {
      await _recorder.start();
      var recording = await _recorder.current(channel: 0);
      setState(() {
        _current = recording;
      });

      const tick = const Duration(milliseconds: 50);
      Timer.periodic(tick, (Timer t) async {
        if (_currentStatus == RecordingStatus.Stopped) {
          t.cancel();
        }

        var current = await _recorder.current(channel: 0);
        // print(current.status);
        setState(() {
          _current = current;
          _currentStatus = _current.status;
        });
      });
    } catch (e) {
      print(e);
    }
  }

  _resume() async {
    await _recorder.resume();
    setState(() {});
  }

  _pause() async {
    await _recorder.pause();
    setState(() {});
  }

  _stop() async {
    var result = await _recorder.stop();
    print("Stop recording: ${result.path}");
    print("Stop recording: ${result.duration}");
    File file = widget.localFileSystem.file(result.path);
    print("File length: ${await file.length()}");
    setState(() {
      _current = result;
      _currentStatus = _current.status;
    });
  }

  Widget _buildText(RecordingStatus status) {
    var text = "";
    switch (_currentStatus) {
      case RecordingStatus.Initialized:
        {
          text = 'Start';
          break;
        }
      case RecordingStatus.Recording:
        {
          text = 'Pause';
          break;
        }
      case RecordingStatus.Paused:
        {
          text = 'Resume';
          break;
        }
      case RecordingStatus.Stopped:
        {
          text = 'Init';
          break;
        }
      default:
        break;
    }
    return Text(text, style: TextStyle(color: Colors.white));
  }

  void onPlayAudio() async {
    AudioPlayer audioPlayer = AudioPlayer();
    await audioPlayer.play(_current.path, isLocal: true);
  }
}