screen_privacy #

This plugin provides functionalities to prevent screenshots and hide app content in the recent apps preview for both Android and iOS platforms. This can be useful for apps displaying sensitive information or media content.

Usage #

Installation #

Add screen_privacy as a dependency in your pubspec.yaml file.

Import #

import 'package:screen_privacy/screen_privacy.dart';

And then you can simply call functions of ScreenPrivacy class instance anywhere

Fine-grained Screenshot Control: #

• Disable Screenshoting: ScreenPrivacy().disableScreenshot();
• Enable Screenshoting: ScreenPrivacy().enableScreenshot();

Recent App Preview Management: #

• Hide App Content: ScreenPrivacy().enablePrivacyScreen();
• Reveal App Content: ScreenPrivacy().disablePrivacyScreen();

Use Case with AutoRoute #

This example demonstrates how to use the ScreenPrivacy plugin within an AutoRoute-based application to selectively disable screenshotting and/or hide app content in the recent apps preview for a specific page. #

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:screen_privacy/screen_privacy.dart';

mixin ScreenPrivacyMixin<T extends StatefulWidget> on State<T> {
  AppLifecycleListener? _listener;
  late final ScreenPrivacy _screenPrivacy;
  bool _isIOSLifecycleUnblockedScreenshot = false;

  bool blockScreenshot();

  bool enablePrivacyScreen();

  @override
  void initState() {
    super.initState();
    _screenPrivacy = ScreenPrivacy();
    _listener = Platform.isIOS && enablePrivacyScreen()
            ? AppLifecycleListener(onStateChange: _onLifecycleChanged)
            : null;

    WidgetsBinding.instance.addPostFrameCallback(_initializer);
  }

  void _initializer(Duration timeStamp) {
    if (Platform.isAndroid) {
      if (enablePrivacyScreen()) {
        _screenPrivacy.enablePrivacyScreen();
      } else if (blockScreenshot()) {
        _screenPrivacy.disableScreenshot();
      }
    } else if (Platform.isIOS) {
      if (blockScreenshot()) {
        _screenPrivacy.disableScreenshot();
      }
    }
  }

  void _onLifecycleChanged(AppLifecycleState state) {
    switch (state) {
      case AppLifecycleState.resumed:
        _screenPrivacy.disablePrivacyScreen();
        if (_isIOSLifecycleUnblockedScreenshot) {
          _screenPrivacy.disableScreenshot();
          _isIOSLifecycleUnblockedScreenshot = false;
        }
        break;
      case AppLifecycleState.inactive:
        if (blockScreenshot()) {
          _screenPrivacy.enableScreenshot();
          _isIOSLifecycleUnblockedScreenshot = true;
        }
        _screenPrivacy.enablePrivacyScreen();

        break;
      case AppLifecycleState.paused:
      case AppLifecycleState.detached:
      case AppLifecycleState.hidden:
        break;
    }
  }

  @override
  void dispose() {
    if (Platform.isAndroid) {
      if (enablePrivacyScreen()) {
        _screenPrivacy.disablePrivacyScreen();
      } else if (blockScreenshot()) {
        _screenPrivacy.enableScreenshot();
      }
    } else if (Platform.isIOS) {
      if (blockScreenshot()) {
        _screenPrivacy.enableScreenshot();
      }
    }

    _listener?.dispose();
    super.dispose();
  }
}

import 'package:auto_route/auto_route.dart';
import 'package:flutter/material.dart';
import '../screen_privacy_helper.dart';
import '../../../../navigation/navigation.dart';

@RoutePage()
class HomePage extends StatefulWidget {
  const HomePage({super.key});

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> with ScreenPrivacyMixin<HomePage> {
  @override
  bool blockScreenshot() {
    return true;
  }

  @override
  bool enablePrivacyScreen() {
    return true;
  }

  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      backgroundColor: Colors.blueGrey,
      body: Center(
        child: Image(
          image: NetworkImage(
            'https://images.unsplash.com/photo-1512850183-6d7990f42385?q=80&w=1974&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D',
          ),
        ),
      ),
    );
  }
}