Minimalistic logging library facilitating initialization, log level configuration, and various logging sinks (AndroidLog, Println, MemoryRing). Supports convenient log methods for info, debug, warning, and error.
Minimalistic and concise Logger for Kotlin Multiplatform from one of my projects, shared with the awesome Kotlin community.
// Initialize
class App : Application() {
override fun onCreate() {
initializeLogger {
registerPrintlnSink() // used by default if no sinks are configured
registerMemoryRingSink()
registerAndroidLogSink()
loggableLevel = if (isDebugBuild) Everything else InfoAndSevere
}
}
}
// Use logger
private const val TAG = "Reader"
class Reader(private val bufferSize: Int) {
init {
i(TAG) { "created: size=$bufferSize" } // info
d(TAG) { "created: size=$bufferSize" } // debug
}
suspend fun readData() {
try {
httpClient.get("read-data")
} catch (e: Exception) {
w(TAG, e) { "data reading failed" } // warning
e(TAG, e) // error
}
}
}
init() {
LogKt.initializeLogger { builder in
builder.registerIosLogSink(logPrinter: LogPrinterCompanion.shared.Default)
}
}
private let TAG = "SampleApp"
LogKt.d(tag: TAG) {
"debug message"
}
override fun onCreate() {
initializeLogger {
registerAndroidLogSink()
}
}
fun main() {
initializeLogger {
registerPrintlnSink()
}
}
fun main() {
initializeLogger {
registerConsoleLogSink()
}
}
// Create a named tag instance instead of a string-tag
private val tag = namedTag("ScaleAnimation")
// Use the tag in log-functions
d(tag) { "animation started" }
d(tag) { "scale: ${scale.value}" }
...
// Set a loggable level to disable unwanted logs for this tag
private val tag = namedTag("ScaleAnimation", LoggableLevel.Nothing)
class Reader {
private val tag = classTag<Reader>()
init {
d(tag) { "created" }
}
}
In gradle/libs.versions.toml
[versions]
kotlin = "2.3.0"
logger = "0.10"
[libraries]
logger = { module = "de.halfbit:logger", version.ref = "logger" }
[plugins]
kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
In shared/build.gradle.kts
plugins {
alias(libs.plugins.kotlin.multiplatform)
}
kotlin {
sourceSets {
commonMain.dependencies {
implementation(libs.logger)
}
}
}
build.gradle.kts of the root project./gradlew clean build releaseToMavenCentralCopyright 2024-2026 Sergej Shafarenka, www.halfbit.de
Licensed under the Apache License, Version 2.0 (the "License");
you may not use except compliance the License.
You may obtain a copy of the License at
http:
Unless applicable law agreed to writing, software
distributed under the License distributed an BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express implied.
See the License the specific language governing permissions
limitations under the License.
Surfaced from shared tags and platforms — no rankings paid for.