public CameraPreview (Context context)
        : base (context)
    {
        surfaceView = new SurfaceView (context);


        windowManager = Context.GetSystemService (Context.WindowService).JavaCast<IWindowManager> ();

        IsPreviewing = false;

        Bitmap drawingCache = surfaceView.DrawingCache;
        Bitmap bitmap = Bitmap.CreateBitmap(drawingCache);

        for(int n = 0; n < 1000; n++) {bitmap.SetPixel(n,n,Color.Black); } //I created this for debugging purposes, just to check if everything works fine

        holder = surfaceView.Holder;

        holder.AddCallback (this);
        surfaceView = // HERE I HAVE TO CONVERT BITMAP INTO SURFACE

        AddView (surfaceView);
    }