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...

In the preceding code, we are combining the methods contained in two libraries: we're using path_provider to retrieve the documents folder in the device and the dart:io library to create a new file, write content, and read its content.

Now, you might be wondering, why do you need to use path_provider to get the documents folder, and not just write anywhere?

Local drives in iOS and Android are mostly inaccessible to apps as a security measure. Apps can only write to select folders, and those include the temp and documents folders.

When dealing with files, you need to do the following:

  1. Get a reference to the file.
  2. Write some content.
  3. Read the file's content.

We performed those steps in this recipe. Note the following instruction:

myFile = File('$documentsPath/pizzas.txt');

This creates a File object, whose path is specified as a parameter.

Then, we have the following instruction:

await myFile.writeAsString('Margherita, Capricciosa, Napoli&apos...