Music Player: Controls

Part of the Layout That Fits section of Coddy's Flutter journey. Lesson 29 of 30.

The last row holds the buttons: previous, play and next. They should share the width evenly, with play exactly in the middle, on any phone.

Wrapping each IconButton in Expanded gives each one a third of the row, and the button sits in the middle of its third. Give the play button a bigger iconSize: so it stands out.

The play button changes: it shows Icons.pause while the song plays and Icons.play_arrow while it does not. That is a bool in state and a ? : to choose the icon.

Challenge

Easy

Under the times, after a SizedBox(height: 16), add a Row of three Expanded IconButton widgets:

Icons.skip_previous, iconSize: 40
the play button, iconSize: 64: Icons.pause while a new field bool _playing = false; is true, Icons.play_arrow while it is false; tapping it flips _playing in setState
Icons.skip_next, iconSize: 40

Try it yourself

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  double _position = 0.3;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: Scaffold(
        appBar: AppBar(title: const Text('Now Playing')),
        body: Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            children: [
              Stack(
                children: [
                  Container(
                    width: double.infinity,
                    height: 300,
                    decoration: BoxDecoration(
                      color: Colors.deepPurple,
                      borderRadius: BorderRadius.circular(24),
                    ),
                    child: const Center(
                      child: Icon(Icons.album, size: 120, color: Colors.white),
                    ),
                  ),
                  Positioned(
                    top: 12,
                    right: 12,
                    child: Container(
                      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                      decoration: BoxDecoration(
                        color: Colors.black54,
                        borderRadius: BorderRadius.circular(8),
                      ),
                      child: const Text(
                        'HD',
                        style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
                      ),
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 24),
              const Text(
                'Midnight Drive',
                style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 4),
              const Text('The Night Owls', style: TextStyle(color: Colors.grey)),
              const SizedBox(height: 16),
              Slider(
                value: _position,
                onChanged: (value) {
                  setState(() {
                    _position = value;
                  });
                },
              ),
              const Row(
                children: [
                  Text('1:12'),
                  Spacer(),
                  Text('3:45'),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}