tizen_audio_manager 0.1.0

A Flutter plugin that allows setting and getting volume level for different audio types as well as getting current playback type.

example/lib/main.dart

// Copyright 2022 Samsung Electronics Co., Ltd. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:tizen_audio_manager/tizen_audio_manager.dart';

void main() {
  runApp(MyApp());
}

/// The main UI app widget.
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Audio Manager Demo',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: VolumeControlScreen(),
    );
  }
}

/// A widget with audio controllers.
class VolumeControlScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _VolumeControlScreenState();
}

class _VolumeControlScreenState extends State<VolumeControlScreen> {
  AudioVolumeType _currentPlaybackType = AudioVolumeType.none;
  AudioVolumeType _selectedType = AudioVolumeType.ringtone;
  int _currentVolume = 0;
  int _maxVolume = 1;
  Timer? _timer;
  VolumeChangedEvent? _volumeChangedEvent;
  StreamSubscription<VolumeChangedEvent>? _subscription;
  final List<DropdownMenuItem<AudioVolumeType>> _dropdownButtonItems =
      AudioVolumeType.values
          .where((AudioVolumeType e) => e != AudioVolumeType.none)
          .map((AudioVolumeType e) =>
              DropdownMenuItem<AudioVolumeType>(value: e, child: Text(e.name)))
          .toList();

  @override
  void initState() {
    super.initState();
    _onAudioTypeChanged(_selectedType);

    _timer = Timer.periodic(const Duration(seconds: 1), (Timer timer) async {
      final AudioVolumeType type =
          await AudioManager.volumeController.currentPlaybackType;

      if (type != _currentPlaybackType) {
        setState(() {
          _currentPlaybackType = type;
        });
      }
    });

    _subscription = AudioManager.volumeController.onChanged
        .listen((VolumeChangedEvent event) {
      setState(() {
        _volumeChangedEvent = event;

        if (event.type == _selectedType) {
          _currentVolume = event.level;
        }
      });
    });
  }

  @override
  void dispose() {
    _timer?.cancel();
    _subscription?.cancel();
    super.dispose();
  }

  Future<void> _onAudioTypeChanged(AudioVolumeType? type) async {
    type = type ?? AudioVolumeType.ringtone;
    final int currentVolume =
        await AudioManager.volumeController.getLevel(type);
    final int maxVolume = await AudioManager.volumeController.getMaxLevel(type);

    setState(() {
      _selectedType = type!;
      _currentVolume = currentVolume;
      _maxVolume = maxVolume;
    });
  }

  void _onVolumeSliderChanged(double value) {
    AudioManager.volumeController.setLevel(_selectedType, value.toInt());

    setState(() {
      _currentVolume = value.toInt();
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Volume control')),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Text('Current playback type: ${_currentPlaybackType.name}'),
          Row(mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[
            const Text('Audio type:'),
            const SizedBox(width: 10),
            DropdownButton<AudioVolumeType>(
              value: _selectedType,
              items: _dropdownButtonItems,
              onChanged: _onAudioTypeChanged,
            )
          ]),
          Text('Volume: $_currentVolume/$_maxVolume'),
          SizedBox(
              width: 250,
              child: Slider(
                value: _currentVolume.toDouble(),
                min: 0,
                max: _maxVolume.toDouble(),
                divisions: _maxVolume,
                onChanged: _onVolumeSliderChanged,
              )),
          if (_volumeChangedEvent == null)
            const Text('')
          else
            Text(
              'Volume for ${_volumeChangedEvent!.type.name} '
              'has changed to ${_volumeChangedEvent!.level}.',
            ),
        ],
      ),
    );
  }
}

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