otp_pin_field

A flutter package which will help you to generate pin code fields with beautiful design and animations. It's a beautiful and highly customizable Flutter widget for entering pin code.

Created by Shivam Mishra @shivbo96

Usage

Use this package as a library

Depend on it Add this to your package's pubspec.yaml file:

dependencies:
  otp_pin_field: <VERSION>

Install it You can install packages from the command line: with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

Import it Now in your Dart code, you can use:

import 'package:otp_pin_field/otp_pin.dart';

Properties

name	type	default	description
fieldCount	int	4	The total length of pin number & the number of pin boxes.
highlightBorder	bool	true	highlight the focused pin box.
activeFieldBorderColor	Color	Colors.black	Set color of the focused pin box.
activeFieldBackgroundColor	Color	Colors.transparent	Set background color of the focused pin box.
defaultFieldBorderColor	Color	Colors.black45	Set color of the unfocused pin box.
defaultFieldBackgroundColor	Color	Colors.transparent	Set background color of the unfocused pin box.
fieldPadding	double	20.0	Set padding for pin box.
fieldBorderRadius	double	2.0	Set border radius for pin box.
fieldBorderWidth	double	2.0	Set border width for pin box.
textStyle	TextStyle	TextStyle(fontSize: 18.0,color: Colors.black,)	TextStyle for styling pin characters.
otpPinFieldInputType	OtpPinFieldInputType	OtpPinFieldInputType.none	Want to show text of otp_pin_field`(OtpPinFieldInputType.none)` or not`(OtpPinFieldInputType.password)` or want to show some special character`(OtpPinFieldInputType.custom)`
otpPinInputCustom	String	"*"	Special character to mask the pin code. Will only work if uses `otpPinFieldInputType` is set to `OtpPinFieldInputType.custom`.
onSubmit	void Function(String)		Callback when the max length of pin code is reached.
otpPinFieldStyle	OtpPinFieldStyle	OtpPinFieldStyle()	Customization for the individual pin boxes. Check `OtpPinFieldStyle` for possible options.
fieldHeight	double	45.0	Height of pin boxes.
fieldWidth	double	70.0	Width of pin boxes.
otpPinFieldDecoration	OtpPinFieldDecoration	OtpPinFieldDecoration.underlinedPinBoxDecoration	Predefine customization for the individual pin boxes. Check `OtpPinFieldStyle` for possible options and use `OtpPinFieldDecoration.custom` for fully customization like boarder radius,width, active and default otp_pin_field colors and etc..
keyboardType	TextInputType	TextInputType.number	The type of the input keyboard
autofocus	bool	false	Autofocus on view entered
cursorColor	Color	Color.black	To give color to the cursor
cursorWidth	double	2	To give width to the cursor
showCursor	bool	true	To show cursor in the otp pin fields
mainAxisAlignment	MainAxisAlignment	MainAxisAlignment.center	Manage the spacing in the otp pin fields
upperChild	Widget	Container()	Widget which will show above the otp pin fields only when `showCustomKeyboard` is set to be true
middleChild	Widget	Container()	Widget which will show between the otp pin fields and Custom Keyboard only when `showCustomKeyboard` is set to be true
showCustomKeyboard	bool	false	To show custom keyboard in place default keyboard
customKeyboard	Widget		Widget which help you to show your own custom keyboard in place if default custom keyboard
showDefaultKeyboard	bool	true	Bool which manage to show default OS keyboard
autoFillEnable	bool	false	Bool which manage to enable auto fill functionality `For Ios it is not needed as the SMS autofill is provided by default, but not for Android, that's where this key is useful.`
smsRegex	String	'\d{0,4}'	String which take use to show the OTP from the message
phoneNumbersHint	bool	false	Bool which manage to enable auto fill functionality `Is a widget that will allow you ask for system phone number and autofill the widget if a phone is choosen by the user. [Android only]`
textInputAction	TextInputAction	TextInputAction.done	In case you want to change the action of keyboard
filledFieldBackgroundColor	Color	Colors.transparent	Set background color of the filled field pin box.
filledFieldBorderColor	Color	Colors.transparent	Set color of the border of filled field pin box.

Example


///  Otp pin Controller
  final _otpPinFieldController = GlobalKey<OtpPinFieldState>();
  
  
      OtpPinField(
              key: _otpPinFieldController,
              autoFillEnable: false,

              ///for Ios it is not needed as the SMS autofill is provided by default, but not for Android, that's where this key is useful.
              textInputAction: TextInputAction.done,

              ///in case you want to change the action of keyboard
              /// to clear the Otp pin Controller
              onSubmit: (text) {
                print('Entered pin is $text');

                /// return the entered pin
              },
              onChange: (text) {
                print('Enter on change pin is $text');

                /// return the entered pin
              },
              onCodeChanged: (code) {
                print('onCodeChanged  is $code');
              },

              /// to decorate your Otp_Pin_Field
              otpPinFieldStyle: OtpPinFieldStyle(
                /// border color for inactive/unfocused Otp_Pin_Field
                defaultFieldBorderColor: Colors.red,

                /// border color for active/focused Otp_Pin_Field
                activeFieldBorderColor: Colors.indigo,

                /// Background Color for inactive/unfocused Otp_Pin_Field
                defaultFieldBackgroundColor: Colors.yellow,

                /// Background Color for active/focused Otp_Pin_Field
                activeFieldBackgroundColor: Colors.cyanAccent,

                /// Background Color for filled field pin box
                filledFieldBackgroundColor: Colors.green,

                /// border Color for filled field pin box
                filledFieldBorderColor: Colors.green,
              ),
              maxLength: 4,

              /// no of pin field
              showCursor: true,

              /// bool to show cursor in pin field or not
              cursorColor: Colors.indigo,

              /// to choose cursor color
              upperChild: Column(
                children: [
                  SizedBox(height: 30),
                  Icon(Icons.flutter_dash_outlined, size: 150),
                  SizedBox(height: 20),
                ],
              ),
              middleChild: Column(
                children: [
                  SizedBox(height: 30),
                  ElevatedButton(
                      onPressed: () {
                        _otpPinFieldController.currentState?.clearOtp(); // clear controller
                      },
                      child: Text('clear OTP')),
                  SizedBox(height: 10),
                  ElevatedButton(onPressed: () => Navigator.push(context, MaterialPageRoute(builder: (context) => NextPage())), child: Text('Next Class')),
                  SizedBox(height: 30),
                ],
              ),
              showCustomKeyboard: true,

              ///bool which manage to show custom keyboard
              // customKeyboard: Container(),
              /// Widget which help you to show your own custom keyboard in place if default custom keyboard
              showDefaultKeyboard: true,

              ///bool which manage to show default OS keyboard
              cursorWidth: 3,

              /// to select cursor width
              mainAxisAlignment: MainAxisAlignment.center,

              /// place otp pin field according to yourself

              /// predefine decorate of pinField use  OtpPinFieldDecoration.defaultPinBoxDecoration||OtpPinFieldDecoration.underlinedPinBoxDecoration||OtpPinFieldDecoration.roundedPinBoxDecoration
              ///use OtpPinFieldDecoration.custom  (by using this you can make Otp_Pin_Field according to yourself like you can give fieldBorderRadius,fieldBorderWidth and etc things)
              otpPinFieldDecoration: OtpPinFieldDecoration.defaultPinBoxDecoration),

Android SMS constraint

For the code to be receive, it need to follow some rules as describe here: https://developers.google.com/identity/sms-retriever/verify

Be no longer than 140 bytes
Contain a one-time code that the client sends back to your server to complete the verification flow
End with an 11-character hash string that identifies your app

One example of SMS would be:

8125 is you verification code Ov114rXIhwf ( Ov114rXIhwf is your hash value which you will get in log ``` search  your hash value is`` and append that value in your sms)

refer to example/lib/main.dart