ForegroundServiceLauncher.kt

class ForegroundServiceLauncher(private val serviceClass: Class<out Service>) {

  private var isStarting = false
  private var shouldStop = false
  private var isCreated = false

  @Synchronized
  fun startService(context: Context, block: Intent.() -> Unit = {}) {
    if (!isCreated) {
        isStarting = true
    }
    shouldStop = false
    ContextCompat.startForegroundService(context, Intent(context, serviceClass).apply { block() })
  }

  @Synchronized
  fun stopService(context: Context) {
    if (isStarting) {
      shouldStop = true
    } else {
      context.stopService(Intent(context, serviceClass))
    }
  }

  @Synchronized
  fun onServiceCreated(service: Service) {
    isCreated = true
    isStarting = false
    if (shouldStop) {
      shouldStop = false
      service.stopSelf()
    }
  }
  
  @Synchronized
  fun onServiceDestroyed() {
    isCreated = false 
  }
}