A Custom Timber Debug Tree with Prepended Tags

TimberDebugTree.kt

import android.os.Build
import timber.log.Timber

const val TIMBER_TAG = "--->"
const val MAX_TAG_LENGTH = 23

class TimberDebugTree : Timber.DebugTree() {
    override fun createStackElementTag(element: StackTraceElement): String? {
        val tag = TIMBER_TAG + super.createStackElementTag(element)

        return if (tag.length <= MAX_TAG_LENGTH || Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            tag
        } else tag.substring(0, MAX_TAG_LENGTH)
    }
}

import android.app.Application
import timber.log.Timber
import TimberDebugTree

class App: Application() {
    override fun onCreate() {
        super.onCreate()

        if (BuildConfig.DEBUG) {
            Timber.plant(TimberDebugTree())
        }
    }
}

TimberDebugTreeGradle.gradle

ext.versions = [
        timber          : '4.7.1',
]

dependencies {
    implementation "com.jakewharton.timber:timber:$versions.timber"
}