Hi Naveen,
In my opinion, the library you used seems very limited in terms of usages and design.
For example, it seems that there is no step for picking a decimal number, whereas integer number does. Added to that, there is a UI design mistake in decimal picker, where the point '.' separing the integer part from decimal part is missing. To illustrate what I try to explain, "2 34" is not a decimal number, whereas "2.34" is.
Therefore, I think that this library is not mature: hazardous API, incorrect UI design.
I look on pub package and found that there is other libraries for picking a number.
So I'm wondering what qualities you found in numberpicker library against the other ones ? What about flutter_picker, dh_picker ?
I think it could be interesting to have a libraries study about number pickers :D. Especially compare libraries to "vanilla" solution: what are the benefits using a library for that purpose ?