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

Setting up the Android module

Since we tested part of the shared code in Chapter 5, Writing Shared Code, we have already done most of the setup. Let's go through what we need to set up before implementing the Android app.

Enabling Jetpack Compose

We'll be using Android's new UI Toolkit: Jetpack Compose. So, first, we'll need to enable it. You can find the official setup guide here:

To enable Jetpack Compose, we'll need to add the following configurations to the build.gradle.kts file of the androidApp module, under the android{} configuration block:

  1. Enable the compose build feature:
    buildFeatures {
            compose = true
  2. Make sure both the Kotlin and Java compilers target Java 8:
    compileOptions {
            sourceCompatibility = JavaVersion.VERSION_1_8