Book Image

Android UI Development with Jetpack Compose - Second Edition

By : Thomas Künneth
5 (1)
Book Image

Android UI Development with Jetpack Compose - Second Edition

5 (1)
By: Thomas Künneth

Overview of this book

Compose has caused a paradigm shift in Android development, introducing a variety of new concepts that are essential to an Android developer’s learning journey. It solves a lot of pain points associated with Android development and is touted to become the default way to building Android apps over the next few years. This second edition has been thoroughly updated to reflect all changes and additions that were made by Google since the initial stable release, and all examples are based on Material 3 (also called Material You). This book uses practical examples to help you understand the fundamental concepts of Jetpack Compose and how to use them when you are building your own Android applications. You’ll begin by getting an in-depth explanation of the declarative approach, along with its differences from and advantages over traditional user interface (UI) frameworks. Having laid this foundation, the next set of chapters take a practical approach to show you how to write your first composable function. The chapters will also help you master layouts, an important core component of every UI framework, and then move to more advanced topics such as animation, testing, and architectural best practices. By the end of this book, you’ll be able to write your own Android apps using Jetpack Compose and Material Design.
Table of Contents (18 chapters)
Part 1: Fundamentals of Jetpack Compose
Part 2: Building User Interfaces
Part 3: Advanced Topics


This chapter covered additional aspects of the ComposeUnitConverter example. We continued the exploration of the ViewModel pattern we began looking at in the Using ViewModel section of Chapter 5, Managing State of Your Composable Functions. This time, we added business logic to the ViewModel and injected an object that can persist and retrieve data.

The Keeping your composables responsive section revisited one of the key requirements of a composable function. Recomposition can occur very often, therefore composables must be as fast as possible, which in turn dictates what the code inside them can and cannot do. I showed you how a simple loop can cause a Compose app to stop responding, and how coroutines are used to counteract this.

In the final main section, Understanding side effects, we examined so-called side effects and used LaunchedEffect and DisposableEffect to implement a simple counter.

In Chapter 8, Working with Animations, you will learn how to show and hide...