Book Image

Kickstart Modern Android Development with Jetpack and Kotlin

By : Catalin Ghita
5 (1)
Book Image

Kickstart Modern Android Development with Jetpack and Kotlin

5 (1)
By: Catalin Ghita

Overview of this book

With Jetpack libraries, you can build and design high-quality, robust Android apps that have an improved architecture and work consistently across different versions and devices. This book will help you understand how Jetpack allows developers to follow best practices and architectural patterns when building Android apps while also eliminating boilerplate code. Developers working with Android and Kotlin will be able to put their knowledge to work with this condensed practical guide to building apps with the most popular Jetpack libraries, including Jetpack Compose, ViewModel, Hilt, Room, Paging, Lifecycle, and Navigation. You'll get to grips with relevant libraries and architectural patterns, including popular libraries in the Android ecosystem such as Retrofit, Coroutines, and Flow while building modern applications with real-world data. By the end of this Android app development book, you'll have learned how to leverage Jetpack libraries and your knowledge of architectural concepts for building, designing, and testing robust Android applications for various use cases.
Table of Contents (17 chapters)
1
Part 1: Exploring the Core Jetpack Suite and Other Libraries
7
Part 2: A Guide to Clean Application Architecture with Jetpack Libraries
13
Part 3: Diving into Other Jetpack Libraries

Defining the Domain layer with Use Cases

So far, we've talked about the Presentation layer (with UI and presentation logic) and the Model layer (with data logic). Yet, apart from these two layers, most of the time, applications also encapsulate a different type of logic, different from UI, presentation, or data logic.

To identify this type of logic, we must first acknowledge that most applications have a dedicated business scope – for example, a food delivery application could have the business scope of taking orders and generating revenue for the stakeholder. The stakeholder is the entity interested in the business, such as the company that owns the restaurant chain.

Such applications can contain business rules imposed by the stakeholders that can vary from minimum order amounts, custom availability ranges for certain restaurants, or predefined time frames for different delivery charges; the list could go on. We can refer to such business rules that are dictated...