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 it works...

In order to create a Hero animation, you need to create two Hero widgets: one for the source, and one for the destination.

In order to implement a Hero animation, do the following:

  • Create the source Hero. A Hero requires a child, which defines how the hero looks (an image or an Icon like in the example of this recipe, or any other relevant widget), and a tag. You use the tag to uniquely identify the widget, and both Source and Destination Hero widgets must share the same tag. In the example in this recipe, we created the source hero with this instruction:
Hero(tag: 'cup$index', child: Icon(Icons.free_breakfast)),

By concatenating the index to the "cup" string, we achieved a unique tag.

Each Hero requires a unique hero tag: this is used to identify which widget will be animated. In a ListView, for example, you cannot repeat the same tag for the items, even if they have the same child, otherwise, you will get an error.

  • Create the destination Hero...