在dart中有没有在模板中使用颜色选择器的方法

dependencies:
  flutter_colorpicker: ^0.4.0

import 'package:flutter_colorpicker/flutter_colorpicker.dart';

Color selectedColor = Colors.black;

RaisedButton(
  onPressed: () {
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('选择颜色'),
          content: SingleChildScrollView(
            child: ColorPicker(
              pickerColor: selectedColor,
              onColorChanged: (color) {
                setState(() {
                  selectedColor = color;
                });
              },
              showLabel: true,
              pickerAreaHeightPercent: 0.8,
            ),
          ),
          actions: <Widget>[
            FlatButton(
              child: const Text('确认'),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  },
  child: const Text('选择颜色'),
),