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 introduced you to the key principles of Jetpack Compose. We closely looked at the underlying ideas and concepts of composable functions, and you now know how they are written and used. We also focused on how to create and update the UI, as well as how Jetpack Compose achieves what other frameworks call repainting or updating the screen. When relevant app data changes, the UI changes, or so-called recomposition, takes place automatically; this is one of the advantages over the traditional View-based approach, where the developer must imperatively change the component tree.

sWe then expanded our knowledge of the concept of modifiers. We looked at how modifier chains work and what you need to keep in mind to always get the intended results. For example, to receive clicks inside padding, padding {} must occur after clickable {} in the modifier chain. Finally, you learned how to implement custom modifiers.

In Chapter 4, Laying Out UI Elements in Compose, we will...