Flutter Screen Data Leakage Protector

A Flutter plugin designed to prevent sensitive data leakage by obscuring the screen when the application is in the background or the App Switcher.

This plugin provides a robust security layer by automatically covering your application's UI with a black overlay during transition states, protecting user privacy and corporate data from being visible in system-level previews.

Features

Automatic Protection: Seamlessly detects when the app is moving to the background or the app switcher.
Security Overlay: Displays a solid black overlay to hide sensitive information.
Auto-Recovery: Automatically removes the overlay when the user returns to the app.
Cross-Platform: Fully supports both Android and iOS with native implementations.
High Performance: Uses native APIs for minimal overhead and immediate protection.

Platform Support

Android	iOS
✅	✅

Installation

Add this to your pubspec.yaml:

dependencies:
  flutter_screen_data_leakage_protector: ^1.0.0

Usage

Simply including the plugin in your project activates its default protection behavior on supported platforms. No additional code configuration is required for basic protection.

import 'package:flutter_screen_data_leakage_protector/flutter_screen_data_leakage_protector.dart';

// The plugin is active as soon as it's included in your project.

How it works

iOS: Uses UIApplication.willResignActiveNotification and UIApplication.didBecomeActiveNotification to toggle a UIView overlay on the key window.
Android: Utilizes ActivityLifecycleCallbacks and a BroadcastReceiver for ACTION_CLOSE_SYSTEM_DIALOGS to detect Home and Recent apps interactions, applying a black View overlay to the decor view.

Verification Steps

Run the application.
Minimize the app or open the App Switcher (Multi-tasking view).
Observe that the screen preview is obscured (blacked out).
Return to the app and confirm the UI is restored immediately.

License

This project is licensed under the MIT License - see the LICENSE file for details.