Anti Screenshot Guard

A Flutter plugin to prevent screenshots and detect screenshot events on Android and iOS.

Platform Support

Platform	Screenshot Prevention	Screenshot Detection
Android	✅ FLAG_SECURE	❌ Not needed
iOS	❌ Not possible	✅ Notification

Android Behavior

Uses WindowManager.LayoutParams.FLAG_SECURE to prevent screenshots and screen recordings
Prevents recent apps preview capture
Can be enabled/disabled dynamically per screen

iOS Behavior

Screenshot prevention is NOT possible due to Apple platform limitations
Detects screenshot events using UIApplication.userDidTakeScreenshotNotification
Allows UI mitigation (blur, overlay, callback) when screenshot is detected

Installation

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

dependencies:
  anti_screenshot_guard: ^1.0.3

Usage

Basic API

import 'package:anti_screenshot_guard/anti_screenshot_guard.dart';

// Enable screenshot protection
await AntiScreenshotGuard.enable();

// Disable screenshot protection
await AntiScreenshotGuard.disable();

// Check if protection is enabled
bool enabled = await AntiScreenshotGuard.isEnabled;

// Listen for screenshot events
AntiScreenshotGuard.addScreenshotListener(() {
  print('Screenshot detected!');
});

// Remove listener
AntiScreenshotGuard.removeScreenshotListener(callback);

SecureScreen(
  enableProtection: true,
  blurOnScreenshot: true,
  onScreenshot: () {
    // Handle screenshot event
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Text('Screenshot Detected'),
        content: Text('Please do not take screenshots of sensitive content.'),
      ),
    );
  },
  child: Container(
    child: Text('Sensitive content here'),
  ),
)

iOS Limitations Warning

⚠️ Important: On iOS, it is impossible to prevent screenshots due to platform restrictions imposed by Apple. Attempting to block screenshots would violate Apple's App Store guidelines and may result in app rejection.

The plugin provides detection capabilities on iOS so you can:

Show warnings to users
Blur sensitive content temporarily
Log screenshot attempts
Implement other mitigation strategies

Example

See the example directory for a complete Flutter app demonstrating the plugin's features.

Author

Panca Nugraha

Support the author ❤️

Saweria:
https://saweria.co/pancanugraha

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https://buymeacoffee.com/pancanugraha