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...

We're going to take a small break from the stopwatch for this recipe: 

  1. Create a new file called login_screen.dart and generate the code snippet for a new StatefulWidget by typing stful and tapping Enter. Your IDE will automatically create a placeholder widget and its state class. 

  2. Name this class LoginScreen. The State class will automatically be named _LoginScreenState. Don't forget to fix your missing imports by bringing in the material library.

  3. Our login screen needs to know whether the user is logged in to show the appropriate widget tree. We can handle this by having a boolean property called loggedIn and forking the widget tree accordingly.

  1. Add the following code just under the class declaration of _LoginScreenState:

bool loggedIn = false;
String name;

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Login'),
),
...