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 to do it...

We will work with a new file in our project, called platform_alert.dart. Let's get started:

  1. Open this new file and create a constructor that will accept a title and message body. This class is just going to be a simple dart object:
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class PlatformAlert {
final String title;
final String message;

const PlatformAlert({@required this.title, @required
: assert(title != null),
assert(message != null);
  1. PlatformAlert is going to need a show method that will look at the app's context to determine what type of device it's running on and then show the appropriate dialog widget. 
  2. Add this method just after the constructor:
void show(BuildContext context) {
final platform = Theme.of(context).platform;

if (platform == TargetPlatform.iOS) {
} else {