Readium Kotlin Toolkit

Readium Mobile is a toolkit for ebooks, audiobooks and comics written in Swift & Kotlin.

☝️ Take a look at the guide to get started. A Test App demonstrates how to integrate the Readium Kotlin toolkit in your own reading app.

❓ Find documentation and API reference at readium.org/kotlin-toolkit.

Minimum Requirements

Readium	Android min SDK	Android compile SDK	Kotlin compiler (✻)	Gradle (✻)
develop	21	35	2.0.21	8.10.2
3.0.0	21	34	1.9.24	8.6.0
2.3.0	21	33	1.7.10	6.9.3

✻ Only required if you integrate Readium as a submodule instead of using Maven Central.

Setting Up Readium

Readium modules are distributed with Maven Central. Make sure that you have the $readium_version property set in your root build.gradle, then add the Maven Central repository.

buildscript {
    ext.readium_version = '3.0.1'
}

allprojects {
    repositories {
        mavenCentral()
    }
}

Then, add the dependencies to the Readium modules you need in your app's build.gradle.

dependencies {
    implementation "org.readium.kotlin-toolkit:readium-shared:$readium_version"
    implementation "org.readium.kotlin-toolkit:readium-streamer:$readium_version"
    implementation "org.readium.kotlin-toolkit:readium-navigator:$readium_version"
    implementation "org.readium.kotlin-toolkit:readium-opds:$readium_version"
    implementation "org.readium.kotlin-toolkit:readium-lcp:$readium_version"
}

⚠️ If you target Android devices running below API 26, you must enable core library desugaring in your application module.

Using a local Git clone

You may prefer to use a local Git clone if you want to contribute to Readium, or if you are using your own fork.

First, add the repository as a Git submodule of your app repository, then checkout the desired branch or tag:

git submodule add https://github.com/readium/kotlin-toolkit.git

Make sure you have Jetifier enabled in your gradle.properties file:

android.enableJetifier=true

Then, include the Readium build to your project's settings.gradle file. The Readium dependencies will automatically build against the local sources.

// Provide the path to the Git submodule.
includeBuild 'kotlin-toolkit'

⚠️ When importing Readium locally, you will need to use the same version of the Android Gradle Plugin in your project.

Building with Readium LCP

Using the toolkit with Readium LCP requires additional dependencies, including the binary liblcp provided by EDRLab. Contact EDRLab to request your private liblcp and the setup instructions.