How to make custom spinner in flutter?

So, I want to make a custom spinner as you can show in image.
Basically, List of data will display and mid one shows highlighted.
This design is for blood group selection. Mid data will be automatically store in some variable.
like String selectedBg = B+;

>Solution :

The one you’re looking for is called the Picker, and you can look at Flutter’s documentation about it.

Cupertino Picker

I hope i have been of help to you.