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

Chapter 3: Exploring the Key Principles of Compose

In the first chapter of this book, we built and run our first Jetpack Compose app. Then, in Chapter 2, Understanding the Declarative Paradigm, we explained the imperative nature of Android's traditional UI toolkit, illustrated some of its weaknesses, and saw how a declarative approach can overcome them.

In this chapter, we build upon these foundations by examining a few key principles Jetpack Compose relies on. This knowledge is essential for writing well-behaving Compose apps. This chapter introduces these key principles.

In this chapter, we will cover the following topics:

  • Looking closer at composable functions
  • Composing and recomposing the user interface (UI)
  • Modifying the behavior of composable functions

We will start by revisiting composable functions, the building blocks of a composable UI. This time, we will dig much deeper into their underlying ideas and concepts. By the end of the first main...