android webview

MainActivity.kt

import kotlinx.android.synthetic.main.activity_main.webview;


class MainActivity : Activity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        webview.loadUrl("https://example.com")
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            val cm = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
            val networkRequest = NetworkRequest.Builder().addTransportType(NetworkCapabilities.TRANSPORT_WIFI).build()
            cm.registerNetworkCallback(networkRequest, networkCallback)
        }
    }

    private var networkCallback = @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
    object: ConnectivityManager.NetworkCallback() {
        override fun onAvailable(network: Network) {
            super.onAvailable(network)
            webview.reload()
        }
    }
  
}