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 it works...

The layout for this recipe was very simple, only containing the list view, and a FloatingActionButton to add new items in the AnimatedList.

An AnimatedList is a ListView that shows an animation when an item is inserted or removed.

The first step you used in this recipe was setting a GlobalKey<AnimatedListState>. This allowed you to store the state of the AnimatedList widget:

final GlobalKey<AnimatedListState> listKey = GlobalKey<AnimatedListState>();

In the example in this recipe, we used an AnimatedList, setting three properties:

  • key: You need a key whenever you need to access the AnimatedList from outside the item itself.
  • initialItemCount: You use the initialItemCount to load the initial items of the list. These won’t be animated. The default value is 0.
  • itemBuilder: This is a required parameter, necessary to build items in an AnimatedList.
    The method inside the itembuilder can return any animation widget. In the example in this recipe, we used...