Xamarin.Android MonoDroid tablet detection code

private void RecalculateScreen()
{
    Display d = Activity.WindowManager.DefaultDisplay;
    graphics.PreferredBackBufferWidth = d.Width;
    graphics.PreferredBackBufferHeight = d.Height;
    graphics.ApplyChanges();

    DisplayMetrics metrics = new DisplayMetrics();
    d.GetMetrics(metrics);

    // Enum: Low = 120, Medium/Default = 160, High = 240, XHigh = 320
    // - přepočet na 100%: Low = 50, Medium/Default = 66.6, High = 100, XHigh = 133.3, XXH: 200
    // - Samsung Galaxy Ace 2: = High (240), ale densityX = 160
    // - převedeme to na 1f = default
    //var densityDPI = metrics.DensityDpi;
    var densityX = metrics.Xdpi;

    //TODO jak to bude vypadat na XXHigh = 480?
    Engine.Params.ScreenSize = new Microsoft.Xna.Framework.Point(d.Width, d.Height);
    Engine.Params.DpiScale = (float)densityX / (float)DisplayMetricsDensity.Default;
    Engine.Params.VirtualSize = new Point((int)(d.Width / (float)Engine.Params.DpiScale), (int)(d.Height / (float)Engine.Params.DpiScale));
    Engine.Params.IsTabletDevice = AndroidOperations.IsTabletDevice(Activity, Application.Context);
    Engine.Params.HQGraphics = false; // Zatím máme pro všechny HQGraphics = false (abychom si to nekomplikovali)

    // Přepočítá danou obrazovku
    Engine.RecalculateScreenResolution();
}

public static class AndroidOperations
{
    public static bool IsTabletDevice(AndroidGameActivity activity, Context activityContext)
    {
        bool xlarge = (activityContext.Resources.Configuration.ScreenLayout & ScreenLayout.SizeMask) >= ScreenLayout.SizeLarge;

        // If XLarge, checks if the Generalized Density is at least MDPI
        // (160dpi)
        if (xlarge)
        {
            Display d = activity.WindowManager.DefaultDisplay;
            DisplayMetrics metrics = new DisplayMetrics();
            d.GetMetrics(metrics);

            // MDPI=160, DEFAULT=160, DENSITY_HIGH=240, DENSITY_MEDIUM=160,
            // DENSITY_TV=213, DENSITY_XHIGH=320
            if (metrics.DensityDpi != DisplayMetricsDensity.Low)
                return true;
        }
        return false;
    }
}