Flutter Audio Record Plugin that supports Record Pause Resume Stop

Flutter plugin that can support audio recording and level metering

Flutter Audio Record Plugin that supports Record Pause Resume Stop and provide access to audio level metering properties average power peak power

Works for both Android and iOS

Code Samples:

• Flutter Application ( using AndroidX )
• Flutter Application ( without AndroidX )

Installation

add flutter_audio_recorder to your pubspec.yaml

iOS Permission

1. Add usage description to plist

<key>NSMicrophoneUsageDescription</key>
<string>Can We Use Your Microphone Please</string>

2. Then use hasPermission api to ask user for permission when needed

Android Permission

1. Add uses-permission to ./android/app/src/main/AndroidManifest.xml in xml root level like below

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

2. Then use hasPermission api to ask user for permission when needed

Configuration

iOS Deployment Target is 8.0 above

Android

• AndroidX: use latest version (0.5.x)
• Legacy Android: use old version (0.4.9)

Usage

Recommended API Usage: hasPermission => init > start -> (pause <-> resume) * n -> stop, call init again before start another recording

Always check permission first(it will request permission if permission has not been set to true/false yet, otherwise it will return the result of recording permission)

bool hasPermission = await FlutterAudioRecorder.hasPermissions;

Initialize (run this before start, so we could check if file with given name already exists)

var recorder = FlutterAudioRecorder("file_path.mp4"); // .wav .aac .m4a
await recorder.initialized;

or

var recorder = FlutterAudioRecorder("file_path", audioFormat: AudioFormat.AAC); // or AudioFormat.WAV
await recorder.initialized;

Sample Rate

var recorder = FlutterAudioRecorder("file_path", audioFormat: AudioFormat.AAC, sampleRate: 22000); // sampleRate is 16000 by default
await recorder.initialized;

Audio Extension and Format Mapping

Audio Format	Audio Extension List
AAC	.m4a .aac .mp4
WAV	.wav

Start recording

await recorder.start();
var recording = await recorder.current(channel: 0);

Get recording details

var current = await recording.current(channel: 0);
// print(current.status);

You could use a timer to access details every 50ms(simply cancel the timer when recording is done)

new Timer.periodic(tick, (Timer t) async {
        var current = await recording.current(channel: 0);
        // print(current.status);
        setState(() {
        });
      });

Recording

Name	Description
path	String
extension	String
duration	Duration
audioFormat	AudioFormat
metering	AudioMetering
status	RecordingStatus

Recording.metering

Name	Description
peakPower	double
averagePower	double
isMeteringEnabled	bool

Recording.status

Unset,Initialized,Recording,Paused,Stopped

Pause

await recorder.pause();

Resume

await recorder.resume();

Stop (after stop, run init again to create another recording)

var result = await recorder.stop();
File file = widget.localFileSystem.file(result.path);

Demo