Book Image

Simplifying Application Development with Kotlin Multiplatform Mobile

By : Róbert Nagy
Book Image

Simplifying Application Development with Kotlin Multiplatform Mobile

By: Róbert Nagy

Overview of this book

Sharing code between platforms can help developers gain a competitive edge, and Kotlin Multiplatform Mobile (KMM) offers a sensible way to do it. KMM helps mobile teams share code between Android and iOS in a flexible way, leaving room for native development. The book begins by helping you to gain a clear understanding of the Kotlin Multiplatform approach, how it works, and how it is different from cross-platform technologies, such as React Native and Flutter, and code sharing options, such as C++. You'll then see how your team can use this software development kit (SDK) to build native applications more effectively by learning timeless concepts and working through practical examples. As you advance, you'll get to grips with the core concepts, understand why UI sharing fails, and get hands-on with developing a small KMM application. Finally, you'll discover expert tips and best practices, along with production- and adoption-related questions, that will help you take the next step in your project and career. By the end of this Kotlin book, you'll have gained a solid understanding of the capabilities of KMM and be able to share code between Android and iOS flexibly.
Table of Contents (15 chapters)
Section 1 - Getting Started with Multiplatform Mobile Development Using Kotlin
Section 2 - Code Sharing between Android and iOS
Section 3 - Supercharging Yourself for the Next Steps

Persisting data in a local database

We'll be using SQLDelight ( for Dogify, though there are other possibilities including NoSQL solutions as well, such as Realm ( and Kodein-DB (

In this section, we're going to do the following:

  1. Explore how to set up SQLDelight in a multiplatform module.
  2. Implement the BreedsLocalSource.
  3. Connect the remaining API functionality to our database.

Let's dive in.

Exploring how to set up SQLDelight in a multiplatform module

As always, the first thing is to add the needed dependencies, so we need to do the following chores:

  1. Add the plugin to the classpath: add classpath("com.squareup.sqldelight:gradle-plugin:$sqlDelightVersion") to the top-level build.gradle.kts.
  2. Apply the plugin to our shared module, by adding id("com.squareup.sqldelight") to the plugins block...