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...

A FadeTransition widget animates the opacity of its child. This is the perfect animation when you want to show or hide a widget over a specified duration of time.

When using FadeTransition, you need to pass two parameters:

  • opacity: This requires an Animation, which controls the transition of the child widget.
  • child: The widget that fades in or out with the animation specified in the opacity.

In this recipe, you set the FadeTransition with these instructions:

opacity: animation,
child: Container(
width: 200,
height: 200,
color: Colors.purple,

In this case, the child is a Container with a width and height of 200 device-independent pixels and a purple background. Of course, you could specify any other widget instead, including an image or an icon.

Animation widgets require an AnimationController. You set the controller with this instruction:

controller = AnimationController(vsync: this, duration: Duration(seconds: 3));

This specified the...