Intent intent = new Intent(this, typeof(NotificationActivity));
                intent.PutExtra("nCentral", "String");
                intent.PutExtra("numgrupo", "String");
                intent.PutExtra("descZona", "String");
                intent.PutExtra("estadoZona", "" + "String");
                intent.PutExtra("nombreGrupo", "String");
                intent.PutExtra("estadoGrupo", "String");
                intent.PutExtra("url", "String");
                intent.PutExtra("Protocolo", "String");
                intent.AddFlags(ActivityFlags.SingleTop | ActivityFlags.ClearTop);
                PendingIntent pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.CancelCurrent);
                oNotBuilder.SetContentIntent(pendingIntent);

protected override void OnCreate(Bundle savedInstanceState)
    {
        try
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.activity_NotificationClick);
            this.RequestedOrientation = Android.Content.PM.ScreenOrientation.Portrait;

            ServicioMensajes.repetirNotificacion = false;
            WebView wPlayer = FindViewById<WebView>(Resource.Id.ntfVideoplayer);
            wPlayer.Settings.LoadWithOverviewMode = true;
            wPlayer.Settings.UseWideViewPort = true;
            wPlayer.LoadUrl(url);

       }

    protected override void OnDestroy()
    {
        base.OnDestroy();
        try
        {
            wPlayer.StopLoading();
            wPlayer = null;
            this.Finish();
        }
        catch (Exception)
        {
            this.Dispose();
            this.Finish();
        }
    }