LocalAnalyticsService.kt

class LocalAnalyticsService : AnalyticsService {
  override fun recordEvent(eventName: String, attributes: Map<String,String>?, metrics: Map<String,Double>?) {
    val event = StringBuilder("")
    attributes?.let {
      for ((k, v) in it) { event.append(", $k=\"$v\"") }
    }
    metrics?.let {
      for ((k, v) in it) { event.append(", $k=${String.format("%.2f",v)}") }
    }
    if (event.isNotEmpty())
      event[0] = ':'
    Log.v(TAG, "recordEvent($eventName)$event")
  }
}