audioplayers_with_rate 1.0.2

A flutter plugin to play multiple audio files simultaneously

example/lib/main.dart

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

import 'package:audioplayers/audio_cache.dart';
import 'package:audioplayers/audioplayers.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:path_provider/path_provider.dart';

import 'player_widget.dart';

typedef void OnError(Exception exception);

const kUrl1 = 'http://www.rxlabz.com/labz/audio.mp3';
const kUrl2 = 'http://www.rxlabz.com/labz/audio2.mp3';

void main() {
  runApp(new MaterialApp(home: new ExampleApp()));
}

class ExampleApp extends StatefulWidget {
  @override
  _ExampleAppState createState() => new _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  AudioCache audioCache = new AudioCache();
  AudioPlayer advancedPlayer = new AudioPlayer();
  String localFilePath;

  Future _loadFile() async {
    final bytes = await readBytes(kUrl1);
    final dir = await getApplicationDocumentsDirectory();
    final file = new File('${dir.path}/audio.mp3');

    await file.writeAsBytes(bytes);
    if (await file.exists()) {
      setState(() {
        localFilePath = file.path;
      });
    }
  }

  Widget _tab(List<Widget> children) {
    return Center(
      child: Container(
        padding: EdgeInsets.all(16.0),
        child: Column(
          children: children
              .map((w) => Container(child: w, padding: EdgeInsets.all(6.0)))
              .toList(),
        ),
      ),
    );
  }

  Widget _btn(String txt, VoidCallback onPressed) {
    return ButtonTheme(
        minWidth: 48.0,
        child: RaisedButton(child: Text(txt), onPressed: onPressed));
  }

  Widget remoteUrl() {
    return _tab([
      Text('Sample 1 ($kUrl1)'),
      PlayerWidget(url: kUrl1),
      Text('Sample 2 ($kUrl2)'),
      PlayerWidget(url: kUrl2),
    ]);
  }

  Widget localFile() {
    return _tab([
      Text('File: $kUrl1'),
      _btn('Download File to your Device', () => _loadFile()),
      Text('Current local file path: $localFilePath'),
      localFilePath == null
          ? Container()
          : PlayerWidget(url: localFilePath, isLocal: true),
    ]);
  }

  Widget localAsset() {
    return _tab([
      Text('Play Local Asset \'audio.mp3\':'),
      _btn('Play', () => audioCache.play('audio.mp3')),
      Text('Loop Local Asset \'audio.mp3\':'),
      _btn('Loop', () => audioCache.loop('audio.mp3')),
      Text('Play Local Asset \'audio2.mp3\':'),
      _btn('Play', () => audioCache.play('audio2.mp3')),
    ]);
  }

  Widget advanced() {
    return _tab([
      Column(children: [
        Text('Source Url'),
        Row(children: [
          _btn('Audio 1', () => advancedPlayer.setUrl(kUrl1)),
          _btn('Audio 2', () => advancedPlayer.setUrl(kUrl2)),
        ], mainAxisAlignment: MainAxisAlignment.spaceEvenly),
      ]),
      Column(children: [
        Text('Release Mode'),
        Row(children: [
          _btn('STOP', () => advancedPlayer.setReleaseMode(ReleaseMode.STOP)),
          _btn('LOOP', () => advancedPlayer.setReleaseMode(ReleaseMode.LOOP)),
          _btn('RELEASE',
              () => advancedPlayer.setReleaseMode(ReleaseMode.RELEASE)),
        ], mainAxisAlignment: MainAxisAlignment.spaceEvenly),
      ]),
      new Column(children: [
        Text('Volume'),
        Row(children: [
          _btn('0.0', () => advancedPlayer.setVolume(0.0)),
          _btn('0.5', () => advancedPlayer.setVolume(0.5)),
          _btn('1.0', () => advancedPlayer.setVolume(1.0)),
          _btn('2.0', () => advancedPlayer.setVolume(2.0)),
        ], mainAxisAlignment: MainAxisAlignment.spaceEvenly),
      ]),
      new Column(children: [
        Text('Control'),
        Row(children: [
          _btn('resume', () => advancedPlayer.resume()),
          _btn('pause', () => advancedPlayer.pause()),
          _btn('stop', () => advancedPlayer.stop()),
          _btn('release', () => advancedPlayer.release()),
        ], mainAxisAlignment: MainAxisAlignment.spaceEvenly),
      ]),
      new Column(children: [
        Text('Rate'),
        Row(children: [
          _btn('0.1', () => advancedPlayer.setRate(0.1)),
          _btn('0.5', () => advancedPlayer.setRate(0.5)),
          _btn('1.0', () => advancedPlayer.setRate(1.0)),
          _btn('2.0', () => advancedPlayer.setRate(2.0)),
          _btn('3.0', () => advancedPlayer.setRate(3.0)),
        ], mainAxisAlignment: MainAxisAlignment.spaceEvenly),
      ]),
    ]);
  }

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 4,
      child: Scaffold(
        appBar: AppBar(
          bottom: TabBar(
            tabs: [
              Tab(text: 'Remote Url'),
              Tab(text: 'Local File'),
              Tab(text: 'Local Asset'),
              Tab(text: 'Advanced'),
            ],
          ),
          title: Text('audioplayers Example'),
        ),
        body: TabBarView(
          children: [remoteUrl(), localFile(), localAsset(), advanced()],
        ),
      ),
    );
  }
}