flutter_audio_visualizer 0.1.1

flutter_audio_visualizer: ^0.1.1 copied to clipboard

example/lib/main.dart

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

void main() {
  runApp(const AudioVisualizerApp());
}

/// Main application demonstrating the audio visualizer package.
class AudioVisualizerApp extends StatelessWidget {
  /// Creates an instance of [AudioVisualizerApp].
  const AudioVisualizerApp({super.key});

  @override
  Widget build(final BuildContext context) => MaterialApp(
    title: 'Flutter Audio Visualizer Demo',
    theme: ThemeData(primarySwatch: Colors.blue, useMaterial3: true),
    home: const AudioVisualizerDemo(),
  );
}

/// Demo page showing different visualization types.
class AudioVisualizerDemo extends StatefulWidget {
  /// Creates an instance of [AudioVisualizerDemo].
  const AudioVisualizerDemo({super.key});

  @override
  State<AudioVisualizerDemo> createState() => _AudioVisualizerDemoState();
}

class _AudioVisualizerDemoState extends State<AudioVisualizerDemo> {
  VisualizationType _currentType = VisualizationType.waveform;
  bool _isPlaying = false;
  double _barWidth = 4;
  late final AudioSource _source;

  @override
  void initState() {
    super.initState();
    _source = MicrophoneAudioSource();
  }

  @override
  void dispose() {
    _source.dispose();
    super.dispose();
  }

  @override
  Widget build(final BuildContext context) => Scaffold(
    appBar: AppBar(
      title: const Text('Audio Visualizer Demo'),
      backgroundColor: Theme.of(context).colorScheme.inversePrimary,
    ),
    body: Padding(
      padding: const EdgeInsets.all(16),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          // Visualization type selector and styling
          Card(
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const Text(
                    'Visualization Type',
                    style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                  ),
                  const SizedBox(height: 16),
                  Wrap(
                    spacing: 8,
                    children: VisualizationType.values
                        .map(
                          (final type) => ChoiceChip(
                            label: Text(type.name.toUpperCase()),
                            selected: _currentType == type,
                            onSelected: (final selected) {
                              if (selected) {
                                setState(() {
                                  _currentType = type;
                                });
                              }
                            },
                          ),
                        )
                        .toList(),
                  ),
                  const Divider(height: 32),
                  const Text(
                    'Bar Width',
                    style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                  ),
                  Slider(
                    value: _barWidth,
                    min: 1,
                    max: 20,
                    onChanged: (final value) {
                      setState(() {
                        _barWidth = value;
                      });
                    },
                  ),
                ],
              ),
            ),
          ),

          const SizedBox(height: 24),

          // Audio visualizer
          Expanded(
            child: Card(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      '${_currentType.name.toUpperCase()} Visualization',
                      style: const TextStyle(
                        fontSize: 18,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                    const SizedBox(height: 16),
                    Expanded(
                      child: AudioVisualizer(
                        audioSource: _source,
                        isActive: _isPlaying,
                        visualizationType: _currentType,
                        style: AudioVisualizerStyle(
                          backgroundColor: Colors.black87,
                          barWidth: _barWidth,
                          barSpacing: 2,
                        ),
                        height: 300,
                        onDataReceived: (final data) {
                          // Handle audio data
                        },
                        onError: (final error) {
                          ScaffoldMessenger.of(context).showSnackBar(
                            SnackBar(
                              content: Text('Error: $error'),
                              backgroundColor: Colors.red,
                            ),
                          );
                        },
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),

          const SizedBox(height: 24),

          // Controls
          Card(
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: [
                  ElevatedButton.icon(
                    onPressed: () {
                      setState(() {
                        _isPlaying = !_isPlaying;
                      });
                    },
                    icon: Icon(_isPlaying ? Icons.pause : Icons.play_arrow),
                    label: Text(_isPlaying ? 'Pause' : 'Play'),
                  ),
                  ElevatedButton.icon(
                    onPressed: () {
                      setState(() {
                        _currentType =
                            VisualizationType.values[(_currentType.index + 1) %
                                VisualizationType.values.length];
                      });
                    },
                    icon: const Icon(Icons.swap_horiz),
                    label: const Text('Next Type'),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    ),
  );
}