Xylophone - Flutter Functions

main.dart

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

void main() => runApp(XylophoneApp());

class XylophoneApp extends StatelessWidget {
  static AudioCache player = AudioCache();

  void playAudio(int audioNumber) {
    player.play('note$audioNumber.wav');
  }

  Expanded audioExpanded({color: Color, audioNumber: int}) {
    return Expanded(
      child: FlatButton(
        color: color,
        onPressed: () {
          playAudio(audioNumber);
        },
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: SafeArea(
          child: Column(
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.end,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              audioExpanded(color: Colors.purpleAccent, audioNumber: 1),
              audioExpanded(color: Colors.redAccent, audioNumber: 2),
              audioExpanded(color: Colors.orange, audioNumber: 3),
              audioExpanded(color: Colors.yellow, audioNumber: 4),
              audioExpanded(color: Colors.lightGreen, audioNumber: 5),
              audioExpanded(color: Colors.green, audioNumber: 6),
              audioExpanded(color: Colors.teal, audioNumber: 7),
            ],
          ),
        ),
      ),
    );
  }
}

https://github.com/londonappbrewery/xylophone-flutter