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...

Reading barcodes is a key feature of many business applications. When using ML Kit's barcode scanning API, your app can automatically recognize most of the standard barcode formats, including QR codes, EAN-13, and ISBN codes.  

The detection of a barcode happens on the device, so it doesn't require a network connection. 

A Barcode object contains several properties, including URLs, emails, geopoints, and calendar events, but most barcodes have a displayValue (the number you find under the barcode on a book, for instance). 

The steps to scan a barcode are similar to those required when recognizing text from an image: you need to get an instance of FirebaseVision, then retrieve a FirebaseVisionImage, and then obtain a BarcodeDetector from the FirebaseVision instance. You did this with the following instructions: 

final FirebaseVision vision = FirebaseVision.instance; 
final FirebaseVisionImage visionImage = FirebaseVisionImage...