Integrate Crashlytics into Timber

MyApplication.kt

/**
 * Application class integrated with Timber and Crashlytics
 */
class MyApplication : Application() {
    override fun onCreate() {
        super.onCreate()

        if(BuildConfig.DEBUG) Timber.plant(Timber.DebugTree())
        else Timber.plant(FirebaseCrashlyticsReportingTree())
    }

    private class FirebaseCrashlyticsReportingTree : Timber.Tree() {

        companion object{
            private const val CRASHLYTICS_KEY_PRIORITY = "priority"
            private const val CRASHLYTICS_KEY_TAG = "tag"
            private const val CRASHLYTICS_KEY_MESSAGE = "message"
        }

        override fun log(priority: Int, tag: String?, message: String, t: Throwable?) {
            if(priority ==  Log.VERBOSE || priority == Log.DEBUG) return

            val throwable = t ?: Exception(message)

            //Crashlytics error details
            FirebaseCrashlytics.getInstance().apply {
                setCustomKey(CRASHLYTICS_KEY_PRIORITY, priority)
                setCustomKey(CRASHLYTICS_KEY_MESSAGE, message)
                setCustomKey(CRASHLYTICS_KEY_TAG, tag ?: "unknown")
            }.also {
                it.recordException(throwable)
            }
        }
    }
}