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

Embedding composables in View hierarchies

As you have seen, integrating Views in composable functions is simple and straightforward using AndroidView() and AndroidViewBinding(). But what about the other way round? Often, you may not want to rewrite an existing (View-based) app from scratch but migrate it to Jetpack Compose gradually, replacing View hierarchies with composable functions step by step. Depending on the complexity of the activity, it may make sense to start with small composables that reflect portions of the UI and incorporate them into the remaining layout.

The androidx.compose.ui.platform.ComposeView view makes composables available inside classic layouts. The class extends AbstractComposeView, which has ViewGroup as its parent. Once the layout that includes it has been inflated, you can configure the ComposeView as follows: {