audioplayer 0.1.0

A flutter plugin to play audio files

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:audioplayer/audioplayer.dart';

const kUrl = "http://www.rxlabz.com/labz/audio2.mp3";
const kUrl2 = "http://www.rxlabz.com/labz/audio.mp3";

void main() {
  runApp(new MaterialApp(home: new Scaffold(body: new AudioApp())));
}

enum PlayerState { stopped, playing, paused }

class AudioApp extends StatefulWidget {
  @override
  _AudioAppState createState() => new _AudioAppState();
}

class _AudioAppState extends State<AudioApp> {
  Duration duration;
  Duration position;

  AudioPlayer audioPlayer;

  PlayerState playerState = PlayerState.stopped;

  get isPlaying => playerState == PlayerState.playing;
  get isPaused => playerState == PlayerState.paused;

  get durationText =>
    duration != null ? duration.toString().split('.').first : '';
  get positionText =>
    position != null ? position.toString().split('.').first : '';

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

  void initAudioPlayer() {
    audioPlayer = new AudioPlayer();

    audioPlayer.setDurationHandler((d) => setState(() {
      print('_AudioAppState.initAudioPlayer => d ${d}');
      duration = d;
    }));

    audioPlayer.setPositionHandler((p) => setState(() {
      print('_AudioAppState.initAudioPlayer => p ${p}');
      position = p;
    }));

    audioPlayer.setCompletionHandler(() {
      onComplete();
      setState(() {
        position = duration;
      });
    });

    audioPlayer.setErrorHandler((msg) {
      print('audioPlayer error : $msg');
      setState(() {
        playerState = PlayerState.stopped;
        duration = new Duration(seconds: 0);
        position = new Duration(seconds: 0);
      });
    });
  }

  Future play() async {
    final result = await audioPlayer.play(kUrl);
    if (result == 1) setState(() => playerState = PlayerState.playing);
  }

  Future pause() async {
    final result = await audioPlayer.pause();
    if (result == 1) setState(() => playerState = PlayerState.paused);
  }

  Future stop() async {
    final result = await audioPlayer.stop();
    if (result == 1)
      setState(() {
        playerState = PlayerState.stopped;
        position = new Duration();
      });
  }

  void onComplete() {
    setState(() => playerState = PlayerState.stopped);
  }

  @override
  void dispose() {
    super.dispose();
    audioPlayer.stop();
  }

  @override
  Widget build(BuildContext context) {
    return new Center(
      child: new Material(
        elevation: 2.0,
        color: Colors.grey[200],
        child: new Container(
          padding: new EdgeInsets.all(16.0),
          child: new Column(mainAxisSize: MainAxisSize.min, children: [
            new Row(mainAxisSize: MainAxisSize.min, children: [
              new IconButton(
                onPressed: isPlaying ? null : () => play(),
                iconSize: 64.0,
                icon: new Icon(Icons.play_arrow),
                color: Colors.cyan),
              new IconButton(
                onPressed: isPlaying ? () => pause() : null,
                iconSize: 64.0,
                icon: new Icon(Icons.pause),
                color: Colors.cyan),
              new IconButton(
                onPressed: isPlaying || isPaused ? () => stop() : null,
                iconSize: 64.0,
                icon: new Icon(Icons.stop),
                color: Colors.cyan),
            ]),
            new Row(mainAxisSize: MainAxisSize.min, children: [
              new Padding(
                padding: new EdgeInsets.all(12.0),
                child: new Stack(children: [
                  new CircularProgressIndicator(
                    value: 1.0,
                    valueColor:
                    new AlwaysStoppedAnimation(Colors.grey[300])),
                  new CircularProgressIndicator(
                    value:
                    position != null && position.inMilliseconds > 0
                      ? position.inMilliseconds /
                      duration.inMilliseconds
                      : 0.0,
                    valueColor: new AlwaysStoppedAnimation(Colors.cyan),
                  ),
                ])),
              new Text(
                position != null
                  ? "${positionText ?? ''} / ${durationText ?? ''}"
                  : duration != null ? durationText : '',
                style: new TextStyle(fontSize: 24.0))
            ])
          ]))));
  }
}