Slider + Emoji - main.dart

main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  double _value = 0;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: Container(
            child: Slider(
              value: _value,
              onChanged: (_newValue) => setState(() {
                _value = _newValue;
              }),
              max: 5,
              min: 0,
              divisions: 5,
              label: _value.toString(),
            ),
          ),
        ),
      ),
    );
  }
}