SLF4J logging support for libGDX

An implementation of com.badlogic.gdx.ApplicationLogger which uses SLF4J API to log messages by libGDX application log methods, like Gdx.app.log, Gdx.app.error and Gdx.app.debug.

Usage

First, add the JitPack repository (https://jitpack.io) and io.github.hider:libgdx-slf4j-logger:1.0.0 dependency to your project. Then, add an SLF4J binding like org.slf4j:slf4j-simple:1.7.36 as a runtime dependency. Finally, set Slf4jApplicationLogger as logger of the com.badlogic.gdx.Application instance. Requires Java 11 or newer.

Gradle

repositories {
    maven {
        url = uri("https://jitpack.io")
    }
}
dependencies {
    implementation("io.github.hider:libgdx-slf4j-logger:1.0.0")
    runtimeOnly("org.slf4j:slf4j-simple:1.7.36")
}

More info

Maven

<project>
    <repositories>
        <repository>
            <id>jitpack.io</id>
            <url>https://jitpack.io</url>
        </repository>
    </repositories>
    <dependencies>
        <dependency>
            <groupId>io.github.hider</groupId>
            <artifactId>libgdx-slf4j-logger</artifactId>
            <version>1.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.36</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>
</project>

More info

Setup ApplicationLogger

As of libGDX 1.11.0, there is only a hacky way to add custom logging to your GDX application. You have to subclass from Lwjgl3Application and override the setApplicationLogger method to use Slf4jApplicationLogger logger. Lwjgl3Application will call this method in its constructor.

Example:

package my.game

import com.badlogic.gdx.ApplicationListener
import com.badlogic.gdx.ApplicationLogger
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application
import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration
import io.github.hider.gdx.slf4j.Slf4jApplicationLogger
import my.game.MyGame

fun main() {
    Application(MyGame(), Lwjgl3ApplicationConfiguration().apply {
        setTitle("Game title")
    })
}

private class Application(listener: ApplicationListener, config: Lwjgl3ApplicationConfiguration) : Lwjgl3Application(listener, config) {
    override fun setApplicationLogger(applicationLogger: ApplicationLogger) {
        super.setApplicationLogger(Slf4jApplicationLogger())
    }
}

License

All source code released under MIT License, see LICENSE.