screen_security #

A zero-dependency Flutter plugin to prevent screen capturing and screen recording on iOS and Android.

Features #

• Prevent screenshots and screen recording on both platforms
• No external dependencies — pure native implementation
• iOS: Does not manipulate the window directly, so camera, keyboard, and SafeArea work correctly
• Android: Uses the standard FLAG_SECURE flag
• Simple enable() / disable() API

Getting Started #

Add the dependency:

dependencies:
  screen_security: ^1.0.0

Usage #

import 'package:screen_security/screen_security.dart';

final screenSecurity = ScreenSecurity();

// Enable screen protection
await screenSecurity.enable();

// Disable screen protection
await screenSecurity.disable();

Platform Requirements #

How It Works #

Android #

Applies FLAG_SECURE to the current Activity window, which prevents the system from including app content in screenshots or screen recordings.

iOS #

Creates a custom UITextField subclass with isSecureTextEntry = true and injects the FlutterView into its internal secure layer. This leverages iOS's built-in DRM rendering pipeline to blank out the content during screen capture — without touching the window hierarchy directly, preserving camera, keyboard, and SafeArea behavior.

Known Issues #

Android build fails with Thai locale (Buddhist Calendar) #

If your system locale is set to Thai (th_TH), the Android Gradle Plugin (AGP) may fail with:

com.google.common.base.VerifyException (no error message)
  at ...MsDosDateTimeUtils.packDate(...)

This is a known AGP bug where BuddhistCalendar returns year 2569 (instead of 2026), which exceeds the MS-DOS date format limit (1980–2107).

Fix: Add the following JVM flags to your project's android/gradle.properties:

org.gradle.jvmargs=... -Duser.language=en -Duser.country=US

Append -Duser.language=en -Duser.country=US to your existing org.gradle.jvmargs line.

License #

MIT — see LICENSE for details.