Flutter Getx template to make starting project fast and easy .

We all face the same problem when we want to start a new project we have to take care of some repeatable things such as

• Theme (light/dark) & store current theme in shared pref 🌒
• Localization & store the current locale in shared pref 🅰️
• Firebase Messaging 📨
• Notifications setup 🔔
• Safe api requests & error handling 🔏
• Changing between widgets during api call (loading,success,failed..etc) 😴
• Snackbar,Toasts & in app notifications 🪖
• Making app more responsive and stop font scaling ⚖️ This project will take care of all this repeatable things so you can start your project in few steps and you will have all the mentioned points set up and ready to use 😎

Project was created using get_cli which is a great tool helping you to (start project,create screens/controllers, handling DI)..etc and we will list other packages that helped to create this skeleton

• GetX for state management,navigation,managing dependencies..etc
• flutter_screenutil to make app more responsive
• hive as local database
• get_storage as shared pref (its more easy and it read data sync)
• awesome_notifications for local notification

Before discovering folders lets first perform some actions to make the project ready to launch

• first run this command it will generate hive type adapters (for our custom classes that we want to store locally)

  flutter packages pub run build_runner build --delete-conflicting-outputs
  

  if you don't want to use hive comment this line in main.dart

  await MyHive.init(adapters: [UserModelAdapter()]);

• To make your app responsive and look exactly as your (xd,figma..etc) design you need to set artbord size for flutter_ScreenUtil in main.dart

  ScreenUtilInit(
    designSize: const Size(375, 812), // change this to your xd artboard size

• FCM & Awesome Notifications are combined at the same class so when ever you connect your app to firebase your app will be ready to receive notifications you don't need to do anything except sending fcm notification to your api via implementing the method (sendFcmTokenToServer) which is inside FcmHelper class 😎

  static _sendFcmTokenToServer(){
      var token = MySharedPref.getFcmToken();
      // TODO SEND FCM TOKEN TO SERVER
  }

• Change app package name

  flutter pub run change_app_package_name:main com.new.package.name
  

• Change app name

  flutter pub run rename_app:main all="My App Name"
  

• Change app launch icon (replace assets/images/app_icon.png with your app icon) then run this command

  flutter pub run flutter_launcher_icons:main
  

• FCM: firebase has recently added (add flutter app) to your firebase which will make adding our flutter(android/ios) app to firebase take only 2 steps 🔥 but first you need to download Firebase CLI and in the terminal execute:

  dart pub global activate flutterfire_cli
  

  then follow the firebase guid you will get command similar to this one

  flutterfire configure --project=flutter-firebase-YOUR_PROJECT_ID
  

  and that's it! your project is now connected to firebase and fcm is up and ready to get notifications

• Responsive app: to make your app responsive you need to get advantage of using flutter_ScreenUtil so instead of using normal double values for height,width,radius..etc you need to use it like this

• 200.w // adapted to screen width
  100.h // /Adapted to screen height
  25.sp // adapter font size
  10.r // adapter radius
  // Example
  Container(
      height: 100.h,
      width: 200.w,
      child: Text("Hello",style: TextStyle(fontSize: 20.sp,))
  )

• Theme

  • Change theme

    MyTheme.changeTheme();

  • Check current theme

    bool isThemeLight = MyTheme.getThemeIsLight();

• Localization

  • Change app locale

    LocalizationService.updateLanguage('en');

  • Get current locale

    LocalizationService.getCurrentLocal();

  • Use translation

    Text(Strings.hello.tr)

• Safe api call

  • logic code (in controller)

        // api call status
      ApiCallStatus apiCallStatus = ApiCallStatus.holding;
    
      // getting data from api simulating
      getData() async {
        // *) indicate loading state
        apiCallStatus = ApiCallStatus.loading;
        update();
        // *) perform api call
        await BaseClient.get(
          Constants.todosApiUrl, // url
          onSuccess: (response){ // api done successfully
            data = List.from(response.data);
            // -) indicate success state
            apiCallStatus = ApiCallStatus.success;
            update(); // update ui
          },
          // if you don't pass this method base client
          // will automatically handle error and show message
          onError: (error){
            // show error message to user
            BaseClient.handleApiError(error);
            // -) indicate error status
            apiCallStatus = ApiCallStatus.error;
            update(); // update ui
          }, // error while performing request
        );
      }

  • UI: MyWidgetsAnimator will animate between widgets depending on current api call status

    GetBuilder<HomeController>(
    builder: (controller){
      LocalizationService.updateLanguage('en');
      LocalizationService.getCurrentLocal();
      return MyWidgetsAnimator(
          apiCallStatus: controller.apiCallStatus,
          loadingWidget: () => const Center(child: CircularProgressIndicator(),),
          errorWidget: ()=> const Center(child: Text('Something went wrong!'),),
          successWidget: () =>
             ListView.separated(
              itemCount: controller.data!.length,
              separatorBuilder: (_,__) => SizedBox(height: 10.h,),
              itemBuilder: (ctx,index) => ListTile(
                  title: Text(controller.data![index]['userId'].toString()),
                  subtitle: Text(controller.data![index]['title']),
                ),
            ),
    
      );
    },
    )

• Snackbars (in app notify):

  CustomSnackBar.showCustomSnackBar(title: 'Done successfully!', message: 'item added to wishlist');
  CustomSnackBar.showCustomErrorSnackBar(title: 'Failed!', message: 'failed to load data');
  CustomSnackBar.showCustomToast(message: 'added to card');
  CustomSnackBar.showCustomErrorToast(message: 'added to card');

        

After setting up all the needed thing now lets talk about folder structure which is mainly based on Getx Pattern and there are some personal opinions, if you open your lib folder you will find those folders

.
└── lib
    ├── app
    │   ├── components
    │   ├── data
    │   │   ├── local
    │   │   └── models
    │   ├── modules
    │   │   └── home
    │   ├── routes
    │   └── services
    ├── config
    │   ├── theme
    │   └── translation
    └── utils

• app: will contain all our core app logic
  • components: will contain all the shared UI widgets
  • data: will contain our models and local data sources (local db & shared pref)
  • modules: app screens
  • routes: generated by get_cli and it will contain our navigation routes
  • services: contain all logic for making safe & clean api calls
• config: will contain app config such as themes, localization services
• utils: for our helper classes

• Theme: if you opened theme package you will see those files

  └── theme
      ├── dark_theme_colors.dart
      ├── light_theme_colors.dart
      ├── my_fonts.dart
      ├── my_styles.dart
      └── my_theme.dart
  
  

  you only need to change app colors (light/dark_theme_colors) and if you want to change app fonts sizes and family just modify my_fonts.dart and that is it you don't need to worry about styles and theme you only need to edit my_syles.dart if you want to change some element theme data (padding,border..etc) and if you want to change theme just use this code

  // change theme and save current theme state to shared pref
  MyTheme.changeTheme();

  and if you want to check if the theme is dark/light just use

  bool themeIsLight = MyTheme.getThemeIsLight();
  // OR
  bool themeIsLight = MySharedPref.getThemeIsLight();

• Localization/translation we will use getx localization system which in the normal case code would look something like this

  class LocalizationService extends Translations {
      @override
      Map<String, Map<String, String>> get keys => {
          'en_US': { 'hello' : 'Hello' },
          'ar_AR': { 'hello' : 'مرحباً' },
      };
  }
  
  Text('hello'.tr); // translated text 

  but because we have so many words to translate we will separate keys file (strings_enum.dart) and languages map into different classes so code will become like this

  class LocalizationService extends Translations {
        @override
        Map<String, Map<String, String>> get keys => {
            'en_US': enUs,
            'ar_AR': arAR,
        };
    }
  // keys
  class Strings {
      static const String hello = 'hello';
  }
  // english words
  const Map<String, String> enUs = {
      Strings.hello : 'Hello',
  }
  // arabic translate
  final Map<String, String> arAR = {
      Strings.hello : 'مرحبا',
  }
  //result
  Text(Strings.hello.tr)

  and that explain why we have this file structure inside our translation package

     └── translations
         ├── ar_Ar
         │   └── ar_ar_translation.dart
         ├── en_US
         │   └── en_us_translation.dart
         ├── localization_service.dart
         └── strings_enum.dart
  

  to change language you will use

  LocalizationService.updateLanguage('en');

  and to get the current locale/language you can use

  LocalizationService.getCurrentLocal();
  // OR
  MySharedPref.getCurrentLocal();

• Safe api call: under if you opened lib/app/services package you will find 3 files

  • api_call_status.dart: which contain all possible stages of our api call (loading,success,error..etc)
  • api_exception.dart: custom exception class to make error handling more informative
  • base_client.dart: contain our safe api call functions to perform api request the right way you would do this

class HomeController extends GetxController {
  // hold data
  List<dynamic>? data;
  // api call status
  ApiCallStatus apiCallStatus = ApiCallStatus.holding;

  // getting data from api simulating
  getData() async {
    // *) indicate loading state
    apiCallStatus = ApiCallStatus.loading;
    update();
    // *) perform api call
    await BaseClient.get(
      Constants.todosApiUrl, // url
      onSuccess: (response){ // api done successfully
        data = List.from(response.data);
        // -) indicate success state
        apiCallStatus = ApiCallStatus.success;
        update(); // update ui
      },
      // if you don't pass this method base client
      // will automatically handle error and show message
      onError: (error){
        // show error message to user
        BaseClient.handleApiError(error);
        // -) indicate error status
        apiCallStatus = ApiCallStatus.error;
        update(); // update ui
      }, // error while performing request
    );
  }

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

base client will catch all the possible errors and if you didn't pass onError function it will automatically catch the error in UI side code will be

GetBuilder<HomeController>(
        builder: (_){
          return MyWidgetsAnimator(
              apiCallStatus: controller.apiCallStatus,
              loadingWidget: () => const Center(child: CircularProgressIndicator(),),
              errorWidget: ()=> const Center(child: Text('Something went wrong!'),),
              successWidget: () =>
                 ListView.separated(
                  itemCount: controller.data!.length,
                  separatorBuilder: (_,__) => SizedBox(height: 10.h,),
                  itemBuilder: (ctx,index) => ListTile(
                      title: Text(controller.data![index]['userId'].toString()),
                      subtitle: Text(controller.data![index]['title']),
                    ),
                ),

          );
        },
      )

NOTE: MyWidgetsAnimator will take care of ui changing with animation you will pass the ApiCallStatus and success,failed,loading..etc widgets and it will take care of transition

For support, email [email protected] or Facebook Emad Beltaje.