code_input
A Flutter widget for inputting content with a fixed length, visually treating each character as a separate segment.
Usage
This is a small example:
CodeInput(
length: 4,
keyboardType: TextInputType.number,
builder: CodeInputBuilders.lightCircle(),
onFilled: (value) => print('Your input is $value.'),
)
Credit (github url) : https://github.com/Rahiche/flutter_code_input
Next Article : https://flutterappdev.com/2019/01/26/photofilters-library-for-flutter-mobile-app-development/