A template for flutter projects with CRUD

by Flutter Awesome

Flutter boilerplate

Flutter Boilerplate Project

Fork this project then start you project with a lot of stuck prepare

Base project made with much ❤️ . Contains CRUD, patterns, and much more!

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Table of contents

How to Use

Step 1:

Download or clone this repo by using the link below:

https://github.com/PingAK9/init-flutter.git

Step 2:

Go to project root and execute the following command in console to get the required dependencies:

flutter pub get

Step 3:

This project uses inject library that works with code generation, execute the following command to generate files:

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

or watch command in order to keep the source code synced automatically:

flutter packages pub run build_runner watch

Hide Generated Files

In-order to hide generated files, navigate to Android Studio -> Preferences -> Editor -> File Types and paste the below lines under ignore files and folders section:

*.inject.summary;*.inject.dart;*.g.dart;

In Visual Studio Code, navigate to Preferences -> Settings and search for Files:Exclude. Add the following patterns:

**/*.inject.summary
**/*.inject.dart
**/*.g.dart

Code Conventions

Depencencies

Helper

  • logger: Small, easy to use and extensible logger which prints beautiful logs.

  • url_launcher: A Flutter plugin for launching a URL in the mobile platform. Supports iOS, Android, web, Windows, macOS, and Linux.

  • auto_route: Auto route generator, Manager router

  • get: Snackbar, Navigation, Theme, Hellper function

  • intl: This package provides internationalization and localization facilities, including message translation, plurals and genders, date/number formatting and parsing, and bidirectional text.

  • shared_preferences: Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.

Other: hive, sqflite

HTTP, API

  • http: A composable, Future-based library for making HTTP requests.

Besides, you can use one of the favorite package DIO

Flutter Fire

The official Firebase plugins for Flutter. sign_in, analytics, crashlytics, storage, firestore

State Management

  • provider: A recommended approach.
    Other recommend

Other favorite package

  • rxdart: RxDart adds additional capabilities to Dart Streams and StreamControllers. Using as bloc pattens
  • flutter_bloc: Widgets that make it easy to integrate blocs and cubits into Flutter. Learn more
  • RiverPod: This project can be considered as a rewrite of provider to make improvements that would be otherwise impossible.
  • Get: A simplified reactive state management solution.
  • stacked: This architecture was initially a version of MVVM.

Widget

Image

Code structure

Here is the core folder structure which flutter provides.

flutter-app/
|- android
|- ios
|- lib
|- modules
|- test

Here is the folder structure we have been using in this project

lib/
|- code/
|- data/
|- _devmode/
  |- mock/
  |- view/
  |- widget/
|- services/
|- feature/
  |- dashboard/
    |- widget/
    |- controller
    |- dashboard_screen.dart
  |- home/
  |- login/
|- plugins/
|- routing/
|- shared/
  |- widget/
  |- controller/
  |- models/
  |- view/
|- main.dart
|- modules

Here is the folder structure of core modules in this project

ping9/
|- code/
|- dialog/
|- theme/
|- widget/
|- view/

Now, lets dive into the lib folder which has the main code for the application.

Theme

If our application supports light and dark theme and these themes are custom themes. We will be adding all the colors which are needed for each widget type. One more file we will be creating theme_config.dart which describes all the constants related to the theme.

There are 2 thing we need custom for each theme.
We need to create two files light_theme.dart, dark_theme.dart where we will be adding all the colors which are needed for each widget type

  • ThemeData (styles): fontFamily, primaryColor, brightness, textTheme, inputDecorationTheme, buttonTheme
  • ColorScheme: Create extension for ColorScheme to add any custom color for Dark and Light mode. So it will update widget when you change theme run-time

Config

This directory contains/Config all the application level constants. A separate file is created for each type as shown in example below:

  • assest_path.dart: Although we have described the assets path in pubspec.yaml but to use that asset in an application we need to give there relative path in any widgets.
    If we add all the assets relative path in one file then it will be easy for us to get all the paths and update the path if required in the future.
  • app_constants.dart: This is where all our application constants will be present and this is different for each application.

Here is how the constants folder looks like:

Config/
|- constants.dart
|- app_config.dart
|- device_info.dart
|- preferences.dart
|- content.dart

Routes

This file contains all the routes for your application.
Using auto_router to generator Route setting and Router

import 'package:flutter/material.dart';

import 'ui/home/home.dart';
import 'ui/login/login.dart';
import 'ui/splash/splash.dart';

class Routes {
  Routes._();

  //static variables
  static const String splash = '/splash';
  static const String login = '/login';
  static const String home = '/home';

  static final routes = <String, WidgetBuilder>{
    splash: (BuildContext context) => SplashScreen(),
    login: (BuildContext context) => LoginScreen(),
    home: (BuildContext context) => HomeScreen(),
  };
}

If you’re working with only one navigator

ExtendedNavigator.root.push(..)

Using context for stack navigator

ExtendedNavigator.of(context).push(...)
// or
context.navigator.push(...)
context.rootNavigator.push(...)
// give your navigator a name
ExtendedNavigator(router: Router(), name: "nestedNav")
//call it by its name
ExtendedNavigator.named("nestedNav").push(...)

More information – auto_route

Services

All the business logic of your application will go into this directory, it represents the data layer of your application. It is sub-divided into three directories local, network and shared_perf, each containing the domain specific logic. Since each layer exists independently, that makes it easier to unit test. The communication between UI and data layer is handled by using central repository.

Services/
|- analytics_service.dart
|- authentication_service.dart
|- cloud_storage_service.dart
|- dialog_service.dart
|- firestore_service.dart
|- google_service.dart
|- shared_preference_service.dart
|- theme_service.dart
|- user_service.dart

Using dependency injection pattern to manager all the services.

void setupLocator() {
  Get.lazyPut(() => DialogService());
  Get.lazyPut(() => UserService());
  Get.lazyPut(() => AuthenticationService());
  Get.lazyPut(() => FirestoreService());
  Get.lazyPut(() => UserDefaults());
  Get.lazyPut(() => CloudStorageService());
  Get.lazyPut(() => ThemeService());
  Get.lazyPut(() => TabBarViewModel());
  Get.lazyPut(() => ConstantData());
}

Feature

Split app to feature. All the modules and core features should contain these four folders to separate out the business logic from the UI.

|- feature/
  |- dashboard/
    |- widget/
    |- controller
    |- dashboard_screen.dart
  |- home/
  |- login/

UI/Widgets

Contains the common widgets that are shared across multiple screens. For example, Button, TextField etc.

widgets/
|- form
|- block
|- button
| - ...

viewmodels

The store is where all your application state lives in flutter. The Store is basically a widget that stands at the top of the widget tree and passes it’s data down using special methods. In-case of multiple stores, a separate folder for each store is created as shown in the example below:

viewmodels/
|- player-viewmodel
|- manager-viewmodel
|- rating-viewmodel
|- login-viewmodel
|- user-viewmodel
|- squad-viewmodel
  • FeatureNameScreen.dart
  • Controller/ This folder contains the repository files which is used to write code for services call and for state management. Recommendation using provider > bloc pattern (rxdart)
  • Widget/ This folder consists of all the screens UI widgets that will be visible to the user.
  • Models/ This folder contains the data models which need to be shown on the dashboard screen.

Main

This is the starting point of the application. All the application level configurations are defined in this file i.e, theme, routes, title, orientation etc.
Using Get package for theme, navigation, snackbar …

  • Init, Setup before run App

Future main() async{
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp()
  setupLocator();
  await AppConfig.instance.appSetup(BuildFlavor.development);
  runApp(MyApp());
}
  • Run App with MaterialApp wrapper
    If you using Get package you should setup with GetMaterialApp
    Also need setup too: Toash, Theme, DialogService, Router, localizations

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: Strings.appName,
      theme: themeData,
      routes: Routes.routes,
      home: SplashScreen(),
    );
  }
}

You code structure look like

Wiki

Checkout wiki for more info

GitHub

View Github