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Safeguard your .NET MAUI app effortlessly by preventing content exposure, screenshots, and recordings with ease.

License: MIT License

C# 100.00%

ios android maui mobile net protection protector screen security shield

plugin.maui.screensecurity's Introduction

Hi 👋, I'm Fabricio Bertani

Experienced back-end and mobile app developer for 6+ years, specializing in .Net, Android, Xamarin, and Flutter. Adaptable and committed to delivering top-quality software. 👨‍💻

📝 I regularly write articles on
😄 Pronouns: he/him/his.
💬 Ask me about anything, I am happy to help.
⚡ Fun fact: I can hold my breath for ten minutes 🐒🏝️

You can reach me at :

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plugin.maui.screensecurity's Issues

Android Emulator - Take screenshot (ctrl+s) is still capturing the screen.

I've added the following code to an OnAppearing method:

    protected override void OnAppearing()
    {
        base.OnAppearing();

#if ANDROID
ScreenSecurity.Default.ActivateScreenSecurityProtection();
#elif IOS
var screenProtectionOptions = new ScreenProtectionOptions
{
HexColor = "#6C4675",
PreventScreenshot = true,
PreventScreenRecording = true
};

        ScreenSecurity.Default.ActivateScreenSecurityProtection(screenProtectionOptions);

#endif
}

But when I run the code through an Android emulator, a screen shot (ctrl+s) is still being captured!

I'm using:
Windows 11 Home.
Microsoft Visual Studio Professional 2022 (64-bit) - Current Version 17.8.5.
Android 14.0 - API 34.
Android Emulator - Pixel 5.

Thank you in advance for your help.

Kind regards,

Darren

not working after FilePicker.Default.PickAsync

hi, i have an issue

ScreenSecurity.Default.ActivateScreenSecurityProtection();
var result = await FilePicker.Default.PickAsync(options);

this code works for me.

but

var result = await FilePicker.Default.PickAsync(options);
ScreenSecurity.Default.ActivateScreenSecurityProtection();

screen security will not activate after await FilePicker.Default.PickAsync.

can u help me?
everything is ok on windows. my problem is on android

i want to activate screen security on some file types not for all of them.

Add net6.0/net7.0 targets

The architecture of my app looks like this: maui app (android/ios) -> UI library -> Core library

maui app project holds the platform specific code (required to start the app)
UI library holds the UI code (pages, views)
Core library holds the business logic code (view models, services, models...)

Now that this plugin has a unified API, I'd like to call it from my Core library, which is pure net7.0.
However, the current build targets of this plugin only allows it to be called from platform specific code.

So, could you please add net6.0/net7.0 targets?

Thanks

iOS 17 screen blur but screenshots allowed - not fixed after update to 1.1.6

See details:
https://github.com/denhaandrei/iOSDisableScreenshot

        public AppShell()
        {
            InitializeComponent();
            Navigating += Current_Navigating;
            Navigated += AppShell_Navigated;
        }

        private static bool isSecure = false;
        private void Current_Navigating(object sender, ShellNavigatingEventArgs e)
        {
            var str = e.Target.Location.OriginalString;
            if (!isSecure && isSecurityPage(str))
            {
                isSecure = true;
                ScreenSecurity.Default.ActivateScreenSecurityProtection(true, true, true);
            }
        }

        private void AppShell_Navigated(object sender, ShellNavigatedEventArgs e)
        {
            var currentPath = GetCurrentPath();

            if (isSecure && !string.IsNullOrWhiteSpace(currentPath) &&
                !isSecurityPage(currentPath))
            {
                isSecure = false;
                ScreenSecurity.Default.DeactivateScreenSecurityProtection();
            }
        }

        private bool isSecurityPage(string currentPath)
        {
            return currentPath.EndsWith(nameof(DScreenshot));
        }

AppShell:
Current_Navigating - disable screenshots on some pages
AppShell_Navigated - enable screenshots

Blur works as expected but screenshots are always allowed on iOS 17

Details:

Xamarin.PreBuilt.iOS[2423:1841789] Exception Stacktrace:    at Foundation.NSObject.InitializeHandle(NativeHandle handle, String initSelector) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/Foundation/NSObject2.cs:line 661
Xamarin.PreBuilt.iOS[2423:1841789]    at UIKit.UIImage..ctor(String filename) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/build/dotnet/ios/generated-sources/UIKit/UIImage.g.cs:line 106
   at Plugin.Maui.ScreenSecurity.Platforms.iOS.ScreenshotProtectionManager.<>c__DisplayClass4_0.<SetScreenshotProtection>b__0()

Xamarin.PreBuilt.iOS[2423:1841789] SetScreenshotProtection failed with Exception message: Could not initialize an instance of the type 'UIKit.UIImage': the native 'initWithContentsOfFile:' method returned nil.
Xamarin.PreBuilt.iOS[2423:1841789] It is possible to ignore this condition by setting ObjCRuntime.Class.ThrowOnInitFailure to false.

.Net MAUI Blazor

Hi! I have tried implementing this plugin in my .net MAUI Blazor App, but it doesnt seem to work! Is this plugin enabled for Blazor, or not?

Exception: Only the original thread that created a view hierarchy can touch its views

Here is an exception I get sometimes on android:

EnableScreenSecurityProtection failed with Exception message: Only the original thread that created a view hierarchy can touch its views.
Exception Stacktrace:    at Java.Interop.JniEnvironment.InstanceMethods.CallVoidMethod(JniObjectReference , JniMethodInfo , JniArgumentValue* )
   at Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualVoidMethod(String , IJavaPeerable , JniArgumentValue* )
   at Android.Views.Window.SetFlags(WindowManagerFlags , WindowManagerFlags )
   at Plugin.Maui.ScreenSecurity.ScreenSecurityImplementation.EnableScreenSecurityProtection()
  --- End of managed Java.Lang.RuntimeException stack trace ---
android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
	at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:8384)
	at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:1476)
	at android.view.View.requestLayout(View.java:24528)
	at android.view.View.setLayoutParams(View.java:17308)
	at android.view.WindowManagerGlobal.updateViewLayout(WindowManagerGlobal.java:452)
	at android.view.WindowManagerImpl.updateViewLayout(WindowManagerImpl.java:103)
	at android.app.Activity.onWindowAttributesChanged(Activity.java:3869)
	at androidx.appcompat.view.WindowCallbackWrapper.onWindowAttributesChanged(WindowCallbackWrapper.java:115)
	at android.view.Window.dispatchWindowAttributesChanged(Window.java:1172)
	at com.android.internal.policy.PhoneWindow.dispatchWindowAttributesChanged(PhoneWindow.java:3027)
	at android.view.Window.setFlags(Window.java:1148)

Could you please take a look?
Thanks

How to make it work on Mac?

[iOS] Screenshot

Hello @FabriBertani

Thanks for this handy tool however, it seems like this tool doesn't or cannot protect against the User taking a Screenshot as I have been able to take multiple Screenshots and I also looked at perhaps I missed something in a Code. I saw this tool on @jfversluis video on YouTube.

Screenshot/screen sharing detection

I had a thought that could potentially be applicable to this plugin. Instead of preventing screenshots/recording, could it be possible to detect when a user has taken such actions? On iOS, preventing screenshots/recording is quite difficult, but is detection comparatively easier? What about Android?

Being able to detect screenshots/recording and issue a warning to users (or notify the backend system if it's a very serious application that users should not be screenshotting) may be more effective. If users are blocked from taking screenshots, there are still ways to bypass the restriction (e.g. using another device to capture the screen). However, if users receive a warning about violating the terms of service, it may discourage them more effectively.

I thought I'd start a discussion on this topic :)

Not Working for Windows

iOS 17.0.3 not working

as Title~,please~

iOS 17 not support?!

Not working with blazor MAUI (Android) ?

How can I use it with blazor MAUI on Android ?
Your example don't work with it

Use MAUI events

Hi,
I think it would be nice to be able to call this plugin when configuring MAUI app events (MauiAppBuilder.ConfigureLifecycleEvents).
The problem is that iOS methods are already using events, and private methods are (by definition) not accessible.
Maybe there is something I'm not doing correctly?
Thanks

public static MauiAppBuilder ConfigureMaui(this MauiAppBuilder builder)
{
    builder.ConfigureLifecycleEvents(events =>
    {
        events.AddiOS(iOS => iOS.DidEnterBackground(app =>
        {
            ScreenSecurity.Default.EnableBlurScreen(ThemeStyle.Light); // EnableBlurScreen is private
        }));
        events.AddiOS(iOS => iOS.WillEnterForeground(app =>
        {
            ScreenSecurity.Default.DisableBlurScreen(); // DisableBlurScreen is private
        }));
    });
    return builder;
}