December 2022
Intermediate to advanced
307 pages
6h 19m
English
Content preview from Flutter and Dart Cookbook
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Chapter 9. Working with Widgets
In this chapter, we continue our journey with the Flutter framework. We now progress to a high-level overview of the most common widgets.
Widgets are an essential concept in Flutter and provide the basis of most applications. Learning how to integrate the numerous widget types available will significantly enhance your development skills. You will learn:
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What a Scaffold widget is
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How to refactor widgets for better build context performance
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What stateless and stateful widgets are
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How to build interfaces using Row and Column widgets
Refactoring your code is a skill that I highly recommend to avoid bugs and aid general performance. The chapter takes a brief moment to look at refactoring widgets. A widget represents a customizable user interface element, and Flutter provides the flexibility to build out beautiful interfaces without too much effort.
A strong point of Flutter is its ability to enable you to build feature-rich and beautiful interfaces very quickly. Making steady improvements in your code will also build your confidence and provide the least resistance path to working on more complex applications. Over the course of this chapter, we will continue our journey to explore the variety of widgets available to Flutter.
9.1 Creating a Stateless Widget in Flutter
Problem
You do not need to save state (i.e., save a value) associated with on-screen content.
Solution
Use a stateless widget to render on-screen content.
Here’s an example ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.