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...

The new pizzalist.json file contains several inconsistencies for our class: some fields are missing, while others have the wrong data type. These are common occurrences when dealing with data. It's a good idea to always "massage" your data so that it becomes compatible with your classes.

The first error we received after adding the new JSON file was a data type error; the second pizza object in the file contains a description key, with a number instead of a String:

"description": 0,

That's why we received Type Error: "Type int is not a subtype of type String", which basically means, "I was expecting a String, and I found an integer number. Not good."

Fortunately, it's possible to easily transform almost any type into a String by adding the toString() method to the data you want to transform. That's why modifying the instruction like so solves the issue:

this.description = json['description...