Music Player: Progress Slider

Part of the Layout That Fits section of Coddy's Flutter journey. Lesson 28 of 30.

A player shows how far into the song you are, and lets you drag to another spot. That is a Slider, whose value lives in state.

Under it go two times: how much has played on the left, the length of the song on the right. A Row with a Spacer between them pushes them to the two ends, so they line up with the ends of the slider on any phone.

const Row(
  children: [
    Text('0:00'),
    Spacer(),
    Text('4:00'),
  ],
)

Challenge

Easy

Add the progress bar under the artist:

a field double _position = 0.3; in the State
a SizedBox(height: 16), then a Slider showing _position, which stores the new value in setState when it moves
a Row under it with 1:12 at the left edge and 3:45 at the right edge

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> {
  @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)),
            ],
          ),
        ),
      ),
    );
  }
}