gravador 1.0.0

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  • Changelog
  • Example
  • Installing
  • 59

Audio recorder #

pub package Build Status Coverage Status

Record audio and store it locally

Usage #

To use this plugin, add audio_recorder as a dependency in your pubspec.yaml file.

Android #

Make sure you add the following permissions to your Android Manifest

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

iOS #

Make sure you add the following key to Info.plist for iOS

<string>Record audio for playback</string>

Example #

// Import package
import 'package:audio_recorder/audio_recorder.dart';

// Check permissions before starting
bool hasPermissions = await AudioRecorder.hasPermissions;

// Get the state of the recorder
bool isRecording = await AudioRecorder.isRecording;

// Start recording
await AudioRecorder.start(path: _controller.text, audioOutputFormat: AudioOutputFormat.AAC);

// Stop recording
Recording recording = await AudioRecorder.stop();
print("Path : ${recording.path},  Format : ${recording.audioOutputFormat},  Duration : ${recording.duration},  Extension : ${recording.extension},");

Encoding format #

For now, the plugin only use the AAC compression to encode audio. You can specify the extension of the output audio file in the file path that you give to the start method. The recognized extensions are :

  • .m4a
  • .mp4
  • .aac

If the file path does not finish with these extensions, the ".m4a" extension is added by default.

Exceptions #

The start method raise an exception if :

  • A file already exists at the given file path
  • The parent directory of the file path does not exist

Getting Started #

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

[0.0.1] - Published Feb 8, 2018. #

  • Record audio and store it locally

[0.0.2] - Published May 16, 2018. #

  • Support Dart 2

[0.0.3] - Published June 11, 2018. #

  • Update readme

[0.0.4] - Published June 11, 2018. #

  • Added path of application directory to user's file name so that a valid file can be written in iOS.
  • Added diagnostic info to help user find the location of their recorded file.

[0.0.5] - Published August 16, 2018. #

  • Fix readme with the right class name
  • Make Volume up when recording on iOS

[0.0.6] - Published September 9, 2018. #

  • Added test and code coverage report for plugin

[1.0.0] - Published July 4, 2019. #

  • Fix a bug where the MediaRecorder.AudioEncoder format AMR_NB create a confusion for some players
  • Fix for flutter beta v0.10.2
  • Add wav file support

[1.0.1] - Published July 5, 2019. #

  • Fix swift version


import 'dart:io' as io;
import 'dart:math';

import 'package:audio_recorder/audio_recorder.dart';
import 'package:file/file.dart';
import 'package:file/local.dart';
import 'package:flutter/material.dart';
import 'package:path_provider/path_provider.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  _MyAppState createState() => new _MyAppState();

class _MyAppState extends State<MyApp> {
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('Plugin audio recorder'),
        body: new AppBody(),

class AppBody extends StatefulWidget {
  final LocalFileSystem localFileSystem;

      : this.localFileSystem = localFileSystem ?? LocalFileSystem();

  State<StatefulWidget> createState() => new AppBodyState();

class AppBodyState extends State<AppBody> {
  Recording _recording = new Recording();
  bool _isRecording = false;
  Random random = new Random();
  TextEditingController _controller = new TextEditingController();

  Widget build(BuildContext context) {
    return new Center(
      child: new Padding(
        padding: new EdgeInsets.all(8.0),
        child: new Column(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: <Widget>[
              new FlatButton(
                onPressed: _isRecording ? null : _start,
                child: new Text("Start"),
              new FlatButton(
                onPressed: _isRecording ? _stop : null,
                child: new Text("Stop"),
              new TextField(
                controller: _controller,
                decoration: new InputDecoration(
                  hintText: 'Enter a custom path',
              new Text("File path of the record: ${_recording.path}"),
              new Text("Format: ${_recording.audioOutputFormat}"),
              new Text("Extension : ${_recording.extension}"),
              new Text(
                  "Audio recording duration : ${_recording.duration.toString()}")

  _start() async {
    try {
      if (await AudioRecorder.hasPermissions) {
        if (_controller.text != null && _controller.text != "") {
          String path = _controller.text;
          if (!_controller.text.contains('/')) {
            io.Directory appDocDirectory =
                await getApplicationDocumentsDirectory();
            path = appDocDirectory.path + '/' + _controller.text;
          print("Start recording: $path");
          await AudioRecorder.start(
              path: path, audioOutputFormat: AudioOutputFormat.AAC);
        } else {
          await AudioRecorder.start();
        bool isRecording = await AudioRecorder.isRecording;
        setState(() {
          _recording = new Recording(duration: new Duration(), path: "");
          _isRecording = isRecording;
      } else {
            new SnackBar(content: new Text("You must accept permissions")));
    } catch (e) {

  _stop() async {
    var recording = await AudioRecorder.stop();
    print("Stop recording: ${recording.path}");
    bool isRecording = await AudioRecorder.isRecording;
    File file = widget.localFileSystem.file(recording.path);
    print("  File length: ${await file.length()}");
    setState(() {
      _recording = recording;
      _isRecording = isRecording;
    _controller.text = recording.path;

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  gravador: ^1.0.0

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:gravador/gravador.dart';
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Learn more about scoring.

We analyzed this package on Jul 10, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.14
  • Flutter: 1.17.5

Analysis suggestions

Package does not support Flutter platform linux


  • package:gravador/gravador.dart that declares support for platforms: android, ios

Package does not support Flutter platform macos


  • package:gravador/gravador.dart that declares support for platforms: android, ios

Package does not support Flutter platform web


  • package:gravador/gravador.dart that declares support for platforms: android, ios

Package does not support Flutter platform windows


  • package:gravador/gravador.dart that declares support for platforms: android, ios

Package not compatible with SDK dart


  • gravador that is a package requiring null.

Health suggestions

Format lib/gravador.dart.

Run flutter format to format lib/gravador.dart.

Maintenance suggestions

The package description is too short. (-20 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.40.0.flutter-f981f09760 <3.0.0
file ^5.0.4 5.2.1
flutter 0.0.0
path ^1.5.1 1.7.0
Transitive dependencies
collection 1.14.12 1.14.13
intl 0.16.1
meta 1.1.8 1.2.2
sky_engine 0.0.99
typed_data 1.1.6 1.2.0
vector_math 2.0.8 2.1.0-nullsafety
Dev dependencies
path_provider ^1.1.0
test ^1.3.0