NetworkStatusTracker_stage2.kt

class NetworkStatusTracker(context: Context) {
    private val connectivityManager =
        context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
    
    init {
        val networkStatusCallback = object : ConnectivityManager.NetworkCallback() {
            override fun onUnavailable() = println("onUnavailable")
            override fun onAvailable(network: Network) = println("onAvailable")
            override fun onLost(network: Network) = println("onLost")
        }
        
        val request = NetworkRequest.Builder()
            .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
            .build()
        connectivityManager.registerNetworkCallback(request, networkStatusCallback)
    }
}