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 order to find the current location of our user, you have created an async method called findUserLocation. This method leverages the device's GPS to find the latitude and longitude of the user's current location (if available), and returns it to the caller. This method is then used to set the future property of the FutureBuilder object in the user interface.

Before trying to retrieve the user's location, there are two important steps. You should always check whether location services are activated and that the user has granted permission to retrieve their location. In the example in this recipe, you have used the following commands:

PermissionStatus hasPermission = await location.hasPermission();

Later, you added the following:

bool active = await location.serviceEnabled();

The hasPermission method returns a PermissionStatus value, which includes the state of the location permission. The serviceEnabled method returns a Boolean, which is true when...