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 it works...

The first step you performed in this recipe was generating a private key and a keystore with the keytool command-line utility. 

For instance, say you have the following instruction:

keytool -genkey -v -keystore ~/key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias key

This does the following:

  • You generate a new private key with the -genkey option.
  • You create an alias for this key named key with the -alias option.
  • You store the private key in a file called key.jks with the -keystore option.
  • You specify the size (in bytes) and validity (in days) with the -keysize and -validity options.

A build.gradle file is an Android build configuration file. In Flutter, you generally need to interact with two build.gradle files: one is at the project level, in the android directory, and one is at the app level, in the android/app folder. In order to add the signing configuration, you need the app-level build.gradle file.

The app build.gradle file contains the keystore...