Book Image

Android UI Development with Jetpack Compose

By : Thomas Künneth
Book Image

Android UI Development with Jetpack Compose

By: Thomas Künneth

Overview of this book

Jetpack Compose is Android’s new framework for building fast, beautiful, and reliable native user interfaces. It simplifies and significantly accelerates UI development on Android using the declarative approach. This book will help developers to get hands-on with Jetpack Compose and adopt a modern way of building Android applications. The book is not an introduction to Android development, but it will build on your knowledge of how Android apps are developed. Complete with hands-on examples, this easy-to-follow guide will get you up to speed with the fundamentals of Jetpack Compose such as state hoisting, unidirectional data flow, and composition over inheritance and help you build your own Android apps using Compose. You'll also cover concepts such as testing, animation, and interoperability with the existing Android UI toolkit. By the end of the book, you'll be able to write your own Android apps using Jetpack Compose.
Table of Contents (16 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.

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