![]() ![]() MRemoteDesktop - > setListener(remoteDesktopListener) MFrame = (unsigned short * ) mmap(0, mFrameBufferSize, PROT_READ, MAP_PRIVATE, mFileDesc, offset) MRemoteDesktop - > getFrameBufInfo( & mFileDesc, & mFileDescType) MRemoteDesktop - > setScreenInfo(width, height, pixelFormat) Here is sample code showing how to do this: IRemoteDesktop mRemoteDesktop = IRemoteDesktop::getInstance() Register the listener that will receive the callbacks.Map the file descriptor to memory, which can be read later.Get the file descriptor and file descriptor type of the screen that will be captured.Set the height, width, and pixel format for the screen to be captured.Get an instance of the RemoteDesktop class.For any subsequent screen changes, no new callback is sent until the capture request for the outstanding callback is received. When a screen change occurs, the Remote Desktop module sends a screenChanged callback and waits for your app to request a capture. In the listener, your app also captures the screen content. This way, the app doesn’t have to poll continuously for any change in the screen. Your app registers a listener to receive callback notifications when the screen changes. conditionally mark content as secure depending on whether the content is displayed in an enterprise context.remove FLAG_SECURE from content that does not need to be secured.You could suggest that the app provider either: One option is to work with the app provider so that the app content can be remotely viewed for enterprise support and troubleshooting purposes. If an app has turned on this setting for its displayed content, you cannot use the Knox remote viewing feature to capture the app's content. Apps can use the FLAG_SECURE setting to prevent its content from appearing in screenshots or from being viewed on non-secure displays. Through Android's WindowManager.LayoutParams, an app has the option to indicate whether its displayed content is secure. Your app can choose the approach at runtime. Accuracy needed: For example, when wallpaper is on one layer, status bar on another, and all other UI elements on a third layer, framebuffer can miss some content.Availability: Most newer devices do not support framebuffer, so you can use only Surfaceflinger.framebuffer: Read-only access to the Linux framebuffer device (fb0) used to show graphics on the display.Surfaceflinger: Android's composition engine that composes the UI content and updates to the display.Screen content can be accessed through two different methods: The Remote Desktop library allows a device admin to capture the screen content. The remote viewing APIs are accessed through the native (C) Remote Desktop library. It is part of the remote support features, which also includes remote injection. Remote viewing allows apps to send the device's current screen to a remote server. NOTE-This feature was deprecated in API level 35 with Knox SDK v3.8. ![]()
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