secure_app_switcher

Apply a safe masking effect to the app screen on the app switcher or task list.

Functions can be enabled/disabled within any process. It also provides a mechanism for switching functions on a screen-by-screen basis.

The effect is different for iOS and Android.

Usage

Use functions within arbitrary processing

import 'package:secure_app_switcher/secure_app_switcher.dart';

// ON
SecureAppSwitcher.on();

// OFF
SecureAppSwitcher.off();

Use functions on specific screens

It is necessary to set secureAppSwitcherRouteObserver to switch the function at the time of screen transition.

Wrap the target screen widget with MaterialPageRoute and SecureAppSwitcherPage.

• secureAppSwitcherRouteObserver

@override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Secure App Switcher',
      onGenerateRoute: generateRoute,
      navigatorObservers: [secureAppSwitcherRouteObserver], // add
      initialRoute: '/',
    );
  }

• SecureAppSwitcherPage, MaterialPageRoute

// Example: Case where the function is enabled on screen A

Route<dynamic> generateRoute(RouteSettings settings) {
  switch (settings.name) {
    case "/":
      return MaterialPageRoute(builder: (context) {
        return const HomeScreen();
      });    
    case "/screenA":
      return MaterialPageRoute(builder: (context) {
        return const SecureAppSwitcherPage( // add
          style: SecureMaskStyle.dark,
          child: ScreenA(),
        );
      });
  }
}

iOS

For iOS, you can specify the type of mask effect.

SecureAppSwitcher.on(iosStyle: SecureMaskStyle.blurLight);

• Types of mask effects

Light	Dark	BlurLight	BlurDark

Android

FLAG_SECURE of WindowManager LayoutParams is used.

WindowManager.LayoutParams | Android Developers

switching apps	screenshot disabled

• The type of mask effect cannot be specified like iOS.
• In Android 11 or later, the mask effect is reflected by switching other apps once according to the specifications of Android OS.
• Taking screenshots is not allowed when the feature is enabled.

Features and bugs

Please file feature requests and bugs on the issue tracker.