otp_autofill_sms

otp_autofill_sms is a Flutter plugin designed to simplify OTP (One-Time Password) autofill for Android applications.

This plugin is available only for Android, as iOS handles OTP autofill natively. While iOS users benefit from built-in OTP autofill functionality, this plugin provides a seamless experience for Android users by managing OTP autofill without requiring SMS read permissions, thus enhancing user convenience.

Features

• Automatic OTP Detection: Automatically captures and fills OTPs sent via SMS, enhancing user convenience.

• No SMS Permissions Required: Utilizes the SMS User Consent API to function without needing explicit SMS read permissions.

• Easy Integration: Simple setup and integration with your Flutter project.

Screenshots

Default Screen	OTP Autofill

How It Works

The plugin leverages Google's SMS Retriever API to detect OTPs automatically. To ensure proper detection, the SMS message must adhere to specific formatting rules:

SMS Formatting Guidelines

• Length: SMS should be no longer than 140 bytes.

• Content: The message must contain a one-time code for user verification.

• End String: The message should end with an 11-character hash string that identifies your app.

Example SMS Format

Your ExampleApp code is: 915456 FA+9qCVSz

Make sure to generate the Signature Code for both the release and debug versions of your app and append it to your message.

Installation

To add otp_autofill_sms to your Flutter project, follow these steps:

1. Add Dependency: Include the plugin in your pubspec.yaml file:

   dependencies:
     otp_autofill_sms: ^1.0.0

2. Install Packages: Run flutter pub get to fetch the package.

3. Android Configuration: Follow the setup instructions below to configure your Android project.

Setup Instructions

1 Flutter Integration: Import and initialize the plugin in your Dart code:

import 'package:otp_autofill_sms/otp_autofill_sms.dart';

2 Basic Usage:

     // Get the app signature code.
     Future<void> _getSignatureCode() async {
        String? signature = await OtpAutofillSms.getAppSignature();

          print("Signature: $signature");
        
      }
   
   
    // Start listening for incoming SMS messages
      void _startListeningSms() {
        OtpAutofillSms.startListeningSms().then((message) {
          setState(() {
       
          print("Message: $message");

          });
        });
      }
      

Contributing

Contributions are welcome! If you find any bugs or have ideas for improvements, please submit a pull request or open an issue on the otp_autofill_sms repository