As of now, there is no default dotted borderline support in flutter. If there is one, it would have been easy to draw a dotted line using that functionality.
Dotted line reference below,
![](https://fluttercentral.com/Uploads/eb6d5c56-fb6e-4417-8ad3-4ef16829bdb5.PNGwidth="50%height="auto](
So, here I'm sharing the class for drawing a horizontal dotted line.
Here is how you call it.
Hope this helps. Thanks,Srikanth