Getx - Sample SuperController and FullLifeCycleController

main.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart';

void main() {
  runApp(GetMaterialApp(
    initialRoute: '/home',
    getPages: [
      GetPage(
        name: '/home',
        page: () => HomePage(),
        binding: HomeBinding(),
      ),
      GetPage(
        name: '/city',
        page: () => CityPage(),
        binding: CityBinding(),
      ),
    ],
  ));
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('HOME')),
      body: Center(
        child: ElevatedButton(
          onPressed: () => Get.toNamed('/city'),
          child: Text('Go to Cities'),
        ),
      ),
    );
  }
}

class HomeBinding extends Bindings {
  @override
  void dependencies() {
    Get.put(HomeController());
  }
}

class HomeController extends FullLifeCycleController with FullLifeCycle {
  // Mandatory
  @override
  void onDetached() {
    print('HomeController - onDetached called');
  }

  // Mandatory
  @override
  void onInactive() {
    print('HomeController - onInative called');
  }

  // Mandatory
  @override
  void onPaused() {
    print('HomeController - onPaused called');
  }

  // Mandatory
  @override
  void onResumed() {
    print('HomeController - onResumed called');
  }

  // Optional
  @override
  Future<bool> didPushRoute(String route) {
    print('HomeController - the route $route will be open');
    return super.didPushRoute(route);
  }

  // Optional
  @override
  Future<bool> didPopRoute() {
    print('HomeController - the current route will be closed');
    return super.didPopRoute();
  }

  // Optional
  @override
  void didChangeMetrics() {
    print('HomeController - the window size did change');
    super.didChangeMetrics();
  }

  // Optional
  @override
  void didChangePlatformBrightness() {
    print('HomeController - platform change ThemeMode');
    super.didChangePlatformBrightness();
  }
}

class CityBinding extends Bindings {
  @override
  void dependencies() {
    Get.lazyPut(() => CityProvider());
    Get.put(CityController(cityProvider: Get.find()));
  }
}

class CityModel {
  CityModel({
    required this.abbreviation,
    required this.name,
  });

  String abbreviation;
  String name;

  factory CityModel.fromJson(Map<String, dynamic> json) => CityModel(
        abbreviation: json["sigla"],
        name: json["nome"],
      );

  static List<CityModel> listFromJson(list) =>
      List<CityModel>.from(list.map((x) => CityModel.fromJson(x)));
}

class CityController extends SuperController<List<CityModel>> {
  final CityProvider cityProvider;
  CityController({required this.cityProvider});

  @override
  void onInit() {
    findAllCities();
    super.onInit();
  }

  void findAllCities() {
    cityProvider.getCity().then((result) {
      // List<CityModel> data = CityModel.listFromJson(result);
      List<CityModel>? data = result.body;
      //print(result);
      change(data, status: RxStatus.success());
    }, onError: (err) {
      change(null, status: RxStatus.error(err.toString()));
    });
  }

  // Mandatory
  @override
  void onDetached() {
    print('CityController - onDetached called');
  }

  // Mandatory
  @override
  void onInactive() {
    print('CityController - onInative called');
  }

  // Mandatory
  @override
  void onPaused() {
    print('CityController - onPaused called');
  }

  // Mandatory
  @override
  void onResumed() {
    print('CityController - onResumed called');
  }
}

class CityProvider extends GetConnect {
  @override
  void onInit() {
    // All request will pass to jsonEncode so CasesModel.fromJson()
    httpClient.defaultDecoder = CityModel.listFromJson;
    httpClient.addRequestModifier<void>((request) {
      request.headers['Authorization'] = 'Bearer sdfsdfgsdfsdsdf12345678';
      return request;
    });
  }

  Future<Response<List<CityModel>>> getCity() => get<List<CityModel>>(
      'https://servicodados.ibge.gov.br/api/v1/localidades/estados',
      decoder: CityModel.listFromJson);
}

class CityPage extends GetView<CityController> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Cities')),
      body: Container(
        child: controller.obx(
          (state) => ListView.builder(
            itemCount: state?.length,
            itemBuilder: (context, index) {
              return Text(state?[index].name ?? '');
            },
          ),
          onLoading: Center(child: CircularProgressIndicator()),
          onError: (error) => Center(
            child: Text(
              'Error: $error',
              style: TextStyle(fontSize: 18),
              textAlign: TextAlign.center,
            ),
          ),
        ),
      ),
    );
  }
}