如何使用getx statemanagment在flutter中更新选定的单选按钮

dependencies:
  flutter:
    sdk: flutter
  get: ^4.1.4
  get_storage: ^2.0.2

import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';

class RadioButtonController extends GetxController {
  var selectedValue = 0.obs;

  void updateSelectedValue(int newValue) {
    selectedValue.value = newValue;
  }
}

class MyWidget extends StatelessWidget {
  final RadioButtonController radioButtonController =
      Get.put(RadioButtonController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            // 使用GetX的Builder小部件来监听selectedValue变量的变化
            GetBuilder<RadioButtonController>(
              builder: (_) {
                return Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Radio(
                      value: 0,
                      groupValue: radioButtonController.selectedValue.value,
                      onChanged: (newValue) {
                        radioButtonController.updateSelectedValue(newValue);
                      },
                    ),
                    Radio(
                      value: 1,
                      groupValue: radioButtonController.selectedValue.value,
                      onChanged: (newValue) {
                        radioButtonController.updateSelectedValue(newValue);
                      },
                    ),
                    Radio(
                      value: 2,
                      groupValue: radioButtonController.selectedValue.value,
                      onChanged: (newValue) {
                        radioButtonController.updateSelectedValue(newValue);
                      },
                    ),
                  ],
                );
              },
            ),
            // 显示当前选择的值
            Obx(() {
              return Text(
                'Selected Value: ${radioButtonController.selectedValue.value}',
              );
            }),
          ],
        ),
      ),
    );
  }
}