🚨 rethumb will shutdown on September 4th, 2021 🚨 (Twitter)

<< More Tutorials

How to convert an image to JPG, GIF, PNG, TIF or WebP in Kotlin using rethumb?

To convert an image to JPG, GIF, PNG, TIF or WebP in Kotlin use the following code:

import java.io.FileOutputStream
import java.net.URL
import java.nio.channels.Channels

object KotlinRethumbFormatExample {

    @JvmStatic fun main(args: Array<String>) {

        // First apply a square operation, then convert to PNG format.
        val paramOperation1 = "square"
        val paramValue1 = 100

        val paramOperation2 = "format"
        val paramValue2 = "png" // Other formats available: jpg, gif, tiff and webp..

        val imageURL = "http://images.rethumb.com/image_coimbra_600x300.jpg"
        val imageFilename = "resized-image.jpg"

        val url = URL(String.format("http://api.rethumb.com/v1/%s/%s/%s/%s/%s", paramOperation1, paramValue1, paramOperation2, paramValue2, imageURL))
        val fos = FileOutputStream(imageFilename)
        fos.channel.transferFrom(Channels.newChannel(url.openStream()), 0, java.lang.Long.MAX_VALUE)

Start using this example now

Use the following commands to get started:

$ git clone https://github.com/rethumb/rethumb-kotlin-examples.git
$ cd rethumb-kotlin-examples
$ kotlinc format.kt -include-runtime -d format.jar
$ java -jar format.jar

More examples using Kotlin