How to Protect Android Apps from Screen Sharing Malware

Last updated March 31, 2024 by Appdome

Learn to Prevent Screen Sharing in Android apps, in mobile CI/CD with a Data-Driven DevSecOps™ build system.

Why Prevent Screen Sharing in Mobile Apps?

When communication and data transfer from an app is restricted, screen sharing, screen recording, and screenshots may still be used for extracting sensitive data. Preventing these functionalities adds additional protection against data leakage as part of a data loss prevention (DLP) strategy.

How does Appdome Prevent Screen Sharing?

In Android, Appdome protected apps continue to function while screenshots, screen recordings, and mirroring appear with a black overlay, except on secure displays (for example, Google Chromecast and Google Home).

Disclaimer: Please note that threat events for In App Detection and In App Defense on Android 14 and above devices are available only if your Appdome configuration is set up with the required engine number. This specific setup is essential to access these features on the latest Android versions.

Prerequisites for Using Prevent App Screen Sharing:

To use Appdome’s mobile app security build system to Prevent Screen Sharing , you’ll need:

Prevent Screen Sharing on Android apps using Appdome

On Appdome, follow these 3 simple steps to create self-defending Android Apps that Prevent Screen Sharing without an SDK or gateway:

  1. Upload the Mobile App to Appdome.

    1. Upload an app to Appdome’s Mobile App Security Build System

    2. Upload Method: Appdome Console or DEV-API
    3. Android Formats: .apk or .aab
    4. Prevent App Screen Sharing Compatible With: Java, JS, C++, C#, Kotlin, Flutter, React Native, Unity, Xamarin, Cordova and other Android apps
  2. Build the feature: Prevent App Screen Sharing.

    1. Building Prevent App Screen Sharing by using Appdome’s DEV-API:

      1. Create and name the Fusion Set (security template) that will contain the Prevent App Screen Sharing feature as shown below:
      2. fusion set that contains Prevent App Screen Sharing

        Figure 1: Fusion Set that will contain the Prevent App Screen Sharing feature
        Note: Naming the Fusion Set to correspond to the protection(s) selected is for illustration purposes only (not required).

      3. Follow the steps in Sections 2.2.1-2.2.2 of this article, Building the Prevent App Screen Sharing feature via Appdome Console, to add the Prevent App Screen Sharing feature to this Fusion Set.

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set, as shown in Figure 1 above, and get the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 2: Fusion Set Detail Summary
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, App Center, Jenkins, Travis, Team City, Cirlce CI or other system:
        1. Build an API for the app – for instructions, see the tasks under Appdome API Reference Guide
        2. Look for sample APIs in Appdome’s GitHub Repository
    2. Building the Prevent App Screen Sharing feature via Appdome Console

      To build the Prevent App Screen Sharing protection by using Appdome Console, follow the instructions below.

      1. Where: Inside the Appdome Console, go to Build > Security Tab > Mobile Privacy section.
      2. When you select the Prevent App Screen Sharing you'll notice that your Fusion Set you created in step 2.1.1 now bears the icon of the protection category that contains Prevent App Screen Sharing

        Fusion Set applied Prevent App Screen Sharing

        Figure 4: Fusion Set that displays the newly added Prevent App Screen Sharing protection

      3. Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for Prevent App Screen Sharing:
        1. Threat-Events™ OFF > In-App Defense

          If the Threat-Events™ setting is cleared (not selected). Appdome will detect and defend the user and app by enforcing Prevent Screen Sharing.

        2. Threat-Events™ ON > In-App Detection

          When this setting is used, Appdome detects Screen being shared and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing, enforcement, and user notification. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Prevent App Screen Sharing Intelligence and Control in Mobile Apps.


          Note: Available only on Android 14 and above.
        3. Threat-Events™ ON > In-App Defense

          When this setting is used, Appdome detects and defends against Screen Sharing (same as Appdome Enforce) and passes Appdome’s Threat-Event™ attack intelligence the app’s business logic for processing. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Prevent App Screen Sharing Intelligence and Control in Mobile Apps.


          Note: This setting involves two key actions: defending against the threat and reporting it to the app. On Android 14, both these functionalities are available, allowing for comprehensive screen protection. For all other operating systems, only the defense against the threat is operational, without the reporting capability.
      4. Click Build My App at the bottom of the Build Workflow (shown in Figure 3).
    Congratulations!  The Prevent App Screen Sharing protection is now added to the mobile app

Using Threat-Events™ for Screen Sharing Intelligence and Control in Android Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when Screen Sharing is detected. To consume and use Threat-Events™ for Screen Sharing in Android Apps, use registerReceiver in the Application OnCreate, and the code samples for Threat-Events™ for Screen Sharing shown below.

The specifications and options for Threat-Events™ for Screen Sharing are:

Threat-Event™ Elements Prevent Screen Sharing Method Detail
Appdome Feature Name Prevent App Screen Sharing
Threat-Event Mode
OFF, IN-APP DEFENSE Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
Visible in ThreatScope™
Developer Parameters for Preventing Screen Sharing Threat-Event™
Threat-Event NAME BlockedScreenCaptureEvent
Threat-Event DATA reasonData
Threat-Event CODE reasonCode
Threat-Event REF 6801
Threat-Event SCORE
currentThreatEventScore Current Threat-Event score
threatEventsScore Total Threat-events score
Threat-Event Context Keys
message Message displayed for the user on event
externalID The external ID of the event which can be listened via Threat Events
osVersion OS version of the current device
deviceModel Current device model
deviceManufacturer The manufacturer of the current device
fusedAppToken The task ID of the Appdome fusion of the currently running app
kernelInfo Info about the kernel: system name, node name, release, version and machine.
carrierPlmn PLMN of the device
deviceID Current device ID
reasonCode Reason code of the occured event
buildDate Appdome fusion date of the current application
devicePlatform OS name of the current device
carrierName Carrier name of the current device
updatedOSVersion Is the OS version up to date
deviceBrand Brand of the device
deviceBoard Board of the device
buildUser Build user
buildHost Build host
sdkVersion Sdk version
timeZone Time zone
deviceFaceDown Is the device face down
locationLong Location longitude conditioned by location permission
locationLat Location latitude conditioned by location permission
locationState Location state conditioned by location permission
wifiSsid Wifi SSID
wifiSsidPermissionStatus Wifi SSID permission status

With Threat-Events™ enabled (turned ON), Android developers can get detailed attack intelligence and granular defense control in Android applications and create amazing user experiences for all mobile end users when Screen Sharing is detected.

The following is a code sample for native Android apps, which uses all values in the specification above for Prevent App Screen Sharing:


Using Appdome, there are no development or coding prerequisites to build secured Android Apps by using Prevent App Screen Sharing. There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.

Releasing and Publishing Mobile Apps with Prevent App Screen Sharing

After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:

Related Articles:

If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.

Thank you!

Thanks for visiting Appdome! Our mission is to secure every app on the planet by making mobile app security easy. We hope we’re living up to the mission with your project.

Want a Demo?

Anti-Spyware Detection

AlanWe're here to help
We'll get back to you in 24 hours to schedule your demo.