🎤 NativeScript plugin to record and play audio 🎵
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README.md

NativeScript Audio

NativeScript plugin to play and record audio files for Android and iOS.

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Do you need assistance on your project or plugin? Contact the nStudio team anytime at team@nstudio.io to get up to speed with the best practices in mobile and web app development.


Installation

tns plugin add nativescript-audio

Recording Permissions

iOS

  • To record, add the following to your project's Info.plist file in the App_Resources/iOS directory (see here for example).
<key>NSMicrophoneUsageDescription</key>
<string>The app needs to access your Microphone to record.</string>

Android

  • To record, add the following permission to your AndroidManifest.xml file in App_Resources/Android/ directory (see here for example).
<uses-permission android:name="android.permission.RECORD_AUDIO" />

Android Native Classes

iOS Native Classes

Usage

TypeScript Example

import { TNSPlayer } from 'nativescript-audio';

export class YourClass {
  private _player: TNSPlayer;

  constructor() {
    this._player = new TNSPlayer();
    this._player.debug = true; // set true to enable TNSPlayer console logs for debugging.
    this._player
      .initFromFile({
        audioFile: '~/audio/song.mp3', // ~ = app directory
        loop: false,
        completeCallback: this._trackComplete.bind(this),
        errorCallback: this._trackError.bind(this)
      })
      .then(() => {
        this._player.getAudioTrackDuration().then(duration => {
          // iOS: duration is in seconds
          // Android: duration is in milliseconds
          console.log(`song duration:`, duration);
        });
      });
  }

  public togglePlay() {
    if (this._player.isAudioPlaying()) {
      this._player.pause();
    } else {
      this._player.play();
    }
  }

  private _trackComplete(args: any) {
    console.log('reference back to player:', args.player);
    // iOS only: flag indicating if completed succesfully
    console.log('whether song play completed successfully:', args.flag);
  }

  private _trackError(args: any) {
    console.log('reference back to player:', args.player);
    console.log('the error:', args.error);
    // Android only: extra detail on error
    console.log('extra info on the error:', args.extra);
  }
}

Javascript Example:

const audio = require('nativescript-audio');

const player = new audio.TNSPlayer();
const playerOptions = {
  audioFile: 'http://some/audio/file.mp3',
  loop: false,
  completeCallback: function() {
    console.log('finished playing');
  },
  errorCallback: function(errorObject) {
    console.log(JSON.stringify(errorObject));
  },
  infoCallback: function(args) {
    console.log(JSON.stringify(args));
  }
};

player
  .playFromUrl(playerOptions)
  .then(function(res) {
    console.log(res);
  })
  .catch(function(err) {
    console.log('something went wrong...', err);
  });

API

Recorder

TNSRecorder Methods

Method Description
TNSRecorder.CAN_RECORD(): boolean - static method Determine if ready to record.
start(options: AudioRecorderOptions): Promise<void> Start recording to file.
stop(): Promise<void> Stop recording.
pause(): Promise<void> Pause recording.
resume(): Promise<void> Resume recording.
dispose(): Promise<void> Free up system resources when done with recorder.
getMeters(channel?: number): number Returns the amplitude of the input.
isRecording(): boolean - iOS Only Returns true if recorder is actively recording.
requestRecordPermission(): Promise<void> Android Only Resolves the promise is user grants the permission.
hasRecordPermission(): boolean Android Only Returns true if RECORD_AUDIO permission has been granted.

TNSRecorder Instance Properties

Property Description
ios Get the native AVAudioRecorder class instance.
android Get the native MediaRecorder class instance.
debug Set true to enable debugging console logs (default false).

Player

TNSPlayer Methods

Method Description
initFromFile(options: AudioPlayerOptions): Promise Initialize player instance with a file without auto-playing.
playFromFile(options: AudioPlayerOptions): Promise Auto-play from a file.
initFromUrl(options: AudioPlayerOptions): Promise Initialize player instance from a url without auto-playing.
playFromUrl(options: AudioPlayerOptions): Promise Auto-play from a url.
pause(): Promise<boolean> Pause playback.
resume(): void Resume playback.
seekTo(time:number): Promise<boolean> Seek to position of track (in seconds).
dispose(): Promise<boolean> Free up resources when done playing audio.
isAudioPlaying(): boolean Determine if player is playing.
getAudioTrackDuration(): Promise<string> Duration of media file assigned to the player.
playAtTime(time: number): void - iOS Only Play audio track at specific time of duration.
changePlayerSpeed(speed: number): void - On Android Only API 23+ Change the playback speed of the media player.

TNSPlayer Instance Properties

Property Description
ios Get the native ios AVAudioPlayer instance.
android Get the native android MediaPlayer instance.
debug: boolean Set true to enable debugging console logs (default false).
currentTime: number Get the current time in the media file's duration.
volume: number Get/Set the player volume. Value range from 0 to 1.

License

MIT

Demo App

  • fork/clone the repository
  • cd into the src directory
  • execute npm run demo.android or npm run demo.ios (scripts are located in the scripts of the package.json in the src directory if you are curious)