sms_otp_auto_verify

Package Overview

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A Flutter plugin designed to simplify OTP verification via SMS by enabling automatic detection and filling of one-time passcodes. It leverages Android's SMS Retriever API to scan incoming SMS messages for OTP codes, reducing manual input. Ideal for authentication flows requiring SMS-based verification, it enhances user experience by minimizing friction during login or registration processes.

Use cases

Automated OTP code entry in login flows
Streamlining user registration with SMS verification
Reducing user errors in manual OTP input
Integrating with two-factor authentication systems
Supporting onboarding workflows requiring phone verification

Key features

Automatic OTP code detection from SMS
Uses Android SMS Retriever API for secure retrieval
Minimal user interaction required
Simple integration with existing form fields
Real-time code auto-fill without app permissions

Suitable for

Mobile apps requiring SMS OTP verification
Developers seeking seamless OTP UX
Android-focused authentication flows
Apps using Google's SMS Retriever API
Projects prioritizing user convenience in onboarding

Considerations

Only available for Android platforms
Requires proper setup of SMS Retriever API
Dependent on device-level SMS access
May not work on all Android devices or carriers
Limited to SMS-based OTP delivery

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

A new Flutter plugin to enter a digit code usually in cases of Sms Otp Code. and provide SMS Auto Fill using library SMS Retriever API.

Getting Started

Import package

import 'package:sms_otp_auto_verify/sms_otp_auto_verify.dart';

Get Signature Code

String? signature = await SmsVerification.getAppSignature();

Add Widget

codeLength must equals with Sms OTP Code length

TextFieldPin(
    textController: textEditingController,
    autoFocus: true,
    codeLength: _otpCodeLength,
    alignment: MainAxisAlignment.center,
    defaultBoxSize: 46.0,
    margin: 10,
    selectedBoxSize: 46.0,
    textStyle: TextStyle(fontSize: 16),
    defaultDecoration: _pinPutDecoration.copyWith(
    border: Border.all(
    color: Theme.of(context)
    .primaryColor
        .withOpacity(0.6))),
    selectedDecoration: _pinPutDecoration,
    onChange: (code) {
    _onOtpCallBack(code,false);
}),

Listen result from OtpListTextField

_onOtpCallBack(String otpCode, bool isAutofill) {
    setState(() {
      this._otpCode = otpCode;
      if (otpCode.length == _otpCodeLength && isAutofill) {
        _enableButton = false;
        _isLoadingButton = true;
        _verifyOtpCode();
      } else if (otpCode.length == _otpCodeLength && !isAutofill) {
        _enableButton = true;
        _isLoadingButton = false;
      }else{
        _enableButton = false;
      }
    });
  }

Example Sms

<#> ExampleApp: Your code is 5664
   r64Iw/6mD1D

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