Lets-Plot Skia Frontend in Compose Applications (Examples)

Lets-Plot Skia Frontend is a Kotlin Multiplatform library that allows you to embed
Lets-Plot charts in a Compose Multiplatform, Android or Java Swing application.

Compose Multiplatform Demos

To run a Compose Multiplatform demo in IntelliJ IDEA simply navigate to MinimalAppMain.kt or MedianAppMain.kt and select "Run <app>" from the context menu.

Android: Running Demos in IntelliJ IDEA

Project configuration

Due to SKIKO-948, updates for the Android version of the library are temporarily paused.

The last library version with Android support is available with the following dependencies:
implementation("org.jetbrains.skiko:skiko-android:0.8.4")
implementation("org.jetbrains.lets-plot:lets-plot-compose:2.0.0")
implementation("org.jetbrains.lets-plot:lets-plot-kotlin-kernel:4.8.0")
implementation("org.jetbrains.lets-plot:lets-plot-common:4.4.1")

To use lets-plot-compose in an Android project, special configuration is required in build.gradle.kts to serve the Skia binaries:

Click to see the code

Code

```
////////////////////////////////////////////////////////
// Include the following code in your Gradle build script
// to ensure that compatible Skiko binaries are
// downloaded and included in your project.
//
// Without this, you won't be able to run your app
// in the IDE on a device emulator.
// //////////////////////////////////////////////////////

val skikoJniLibsReleaseAssetName = "skiko-jni-libs.zip"
val skikoJniLibsDestDir = file("${project.projectDir}/src/main/jniLibs/")

tasks.register("downloadSkikoJniLibsReleaseAsset") {
    val repoUrl = "https://github.com/JetBrains/lets-plot-skia"
    val releaseTag = "v$letsPlotSkiaVersion"

    doLast {
        val downloadUrl = "$repoUrl/releases/download/$releaseTag/$skikoJniLibsReleaseAssetName"
        val outputFile = layout.buildDirectory.file("downloads/$skikoJniLibsReleaseAssetName").get().asFile

        if (outputFile.exists()) {
            println("File already exists: ${outputFile.absolutePath}")
            println("Skipping download.")
        } else {
            outputFile.parentFile?.mkdirs()

            println("Downloading $skikoJniLibsReleaseAssetName from $downloadUrl")
            URL(downloadUrl).openStream().use { input ->
                outputFile.outputStream().use { output ->
                    input.copyTo(output)
                }
            }
            println("Download completed: ${outputFile.absolutePath}")
        }
    }
}

tasks.register<Copy>("unzipSkikoJniLibsReleaseAsset") {
    dependsOn("downloadSkikoJniLibsReleaseAsset")
    from(zipTree(layout.buildDirectory.file("downloads/$skikoJniLibsReleaseAssetName")))
    into(skikoJniLibsDestDir)
    doFirst {
        delete(skikoJniLibsDestDir)
    }
}

tasks.register("cleanSkikoJniLibs") {
    doLast {
        delete(skikoJniLibsDestDir)
    }
}

tasks.named("clean") {
    dependsOn("cleanSkikoJniLibs")
}

tasks.withType<MergeSourceSetFolders>().configureEach {
    dependsOn("unzipSkikoJniLibsReleaseAsset")
}

////////////////////////////////////////////////////////
```

Setting up the Environment

• Android Plugin

Make sure the Android plugin is installed.

• Android SDK

From menu Tools -> Android -> SDK Manager setup an Android SDK.

The local.properties file will be automatically generated. In case the local.properties file didn't appear in the project root:

• create it manually
• add property sdk.dir pointing to the location of the Android SDK on your system.

For example:

sdk.dir=/Users/john/Library/Android/sdk

• Android Device

From menu Tools -> Android -> Device Manager setup Android device.

For example, Nexus 10 with Android 12 works well.

Running a Demo

Build the project:

./gradlew build

In the Run configurations toolbar:

• Select compose-android-min or compose-android-median application
• Select the Android device
• Click Run

Code of Conduct

This project and the corresponding community are governed by the JetBrains Open Source and Community Code of Conduct. Please make sure you read it.

License

Code and documentation released under the MIT license. Copyright © 2023-2024, JetBrains s.r.o.