StarRating.dart

class StarRating extends StatelessWidget {
  final int stars;
  final Color color;
  final double iconSize;
  const StarRating({Key key, this.stars = 0, this.color, this.iconSize})
      : assert(stars >= 0 && stars <= 5),
        super(key: key);

  @override
  Widget build(BuildContext context) {
    final full = List.generate(stars, (_) => Icon(Icons.star));
    final empty = List.generate(5 - stars, (_) => Icon(Icons.star_border));
    return IconTheme(
      data: IconThemeData(color: color, size: iconSize),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [...full, ...empty],
      ),
    );
  }
}