public static void drawMap(Canvas canvas, Player player, ArrayList<MapField> map)
{
    int a = player.getShiftX()/Constants.TILE_SIZE;
    int b = player.getShiftY()/Constants.TILE_SIZE;
    for (int x = a-Constants.VISIBILITY_X; x<=a+Constants.VISIBILITY_X; x++)
    {
        if (x>=0&&x<=99)
        {
            for (int y = b-Constants.VISIBILITY_Y; y<=b+Constants.VISIBILITY_Y*2-1; y++)
            {
                if (y>=0&&y<=99)
                {
                    map.get(x+y*100).update();
                    map.get(x+y*100).draw(canvas);
                }
            }
        }
    }
}

public void draw(Canvas canvas)
    {
        canvas.drawBitmap(Graphics.TILES_BITMAP[tileId], null, rect, p);
    }