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)
16
About Packt

How to do it...

In this recipe, we will create an app that stores the number of times the app itself has been opened. While the logic of the app is extremely simple, this is useful when you need to keep track of the usage of your app or need to send targeted messages to specific users. In doing so, you will learn how to use the shared_preferences library. Follow these steps:

  1. First, we must add a dependency to shared_preferences. Go to https://pub.dev/packages/shared_preferences/install and check the latest version of the library.
  2. In the pubspec.yaml file of your project, add the shared_preferences dependency (with the version number you retrieved in step 1):
dependencies:
flutter:
sdk: flutter
shared_preferences: ^2.0.5
  1. If necessary, run the flutter pub get command from your Terminal window.
  2. At the top of the main.dart file, import shared_preferences:
import 'package:shared_preferences/shared_preferences.dart';
  1. At the top of the _MyHomePageState class, create...