CheckConnection

 private var connectionReceiver: ConnectionReceiver? = null

    override fun onStart() {
        super.onStart()
        connectionReceiver = ConnectionReceiver()
        registerReceiver(connectionReceiver, IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION))
    }

    override fun onStop() {
        try {
            unregisterReceiver(connectionReceiver)
        } catch (e: IllegalStateException) {
            e.printStackTrace()
        }
        super.onStop()
    }

    inner class ConnectionReceiver : BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent?) {
            val isOnline = NetworkUtil.getConnectivityStatusString(this@Activity)
            if (!isOnline) showDialogNoInternet(this@Activity)
        }
    }