Book Image

Flutter Cookbook

By : Simone Alessandria, Brian Kayfitz
4 (1)
Book Image

Flutter Cookbook

4 (1)
By: Simone Alessandria, Brian Kayfitz

Overview of this book

“Anyone interested in developing Flutter applications for Android or iOS should have a copy of this book on their desk.” – Amazon 5* Review Lauded as the ‘Flutter bible’ for new and experienced mobile app developers, this recipe-based guide will teach you the best practices for robust app development, as well as how to solve cross-platform development issues. From setting up and customizing your development environment to error handling and debugging, The Flutter Cookbook covers the how-tos as well as the principles behind them. As you progress, the recipes in this book will get you up to speed with the main tasks involved in app development, such as user interface and user experience (UI/UX) design, API design, and creating animations. Later chapters will focus on routing, retrieving data from web services, and persisting data locally. A dedicated section also covers Firebase and its machine learning capabilities. The last chapter is specifically designed to help you create apps for the web and desktop (Windows, Mac, and Linux). Throughout the book, you’ll also find recipes that cover the most important features needed to build a cross-platform application, along with insights into running a single codebase on different platforms. By the end of this Flutter book, you’ll be writing and delivering fully functional apps with confidence.
Table of Contents (17 chapters)
About Packt

How to do it...

Let's start building an n-tier architecture, starting with the controller layer:

  1. Since our controllers are supposed to represent a separate tier in the app, it's appropriate to put them in their own folder. Inside the lib directory, create a new folder called controllers
  2. Now, we can create a new dart file, plan_controller.dart. This class will be responsible for all the business logic in our app. Let's start with the class declaration:
import '../models/data_layer.dart';

PlanController {
final _plans = <Plan>[];

// This public getter cannot be modified by any other object
List<Plan> get plans => List.unmodifiable(_plans);
  1. Now, let's add the methods that will be responsible for creating and deleting plans. This is also an appropriate location where we can apply some business logic. 
    First, create a private method that will check a list of items and search for duplicate names. If it finds any...