如何检测屏幕镜像

Question

I have been wondering if there is any way in the android API (or any other lib/framework) that can help me to detect if my device screen is mirrored using WiDi,Miracast or MHL or basically any other technique for mirroring your screen.

Br, Inx

Answer 1

You may navigate through the list of all device display and get flags on each for finding one with, maybe, VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR ? Not sure but a few trys should allow you to figure out which ones will do it.

cf: DisplayManager and VirtualDisplay documentation

Answer 2

You can't detect but you can remove functionality which mirrors.
No software can mirror if developer option is disabled .
This code will tell whether android can mirror or not.

int CanMirror = Settings.Secure.getInt(this.getContentResolver(), Settings.Global.DEVELOPMENT_SETTINGS_ENABLED , 0);
//returns 1 if can mirror
//returns 0 if can't mirror

Reference : https://stackoverflow.com/a/63971764/11390822

Answer 3

Since API level 16 (Android 4.1, released in 2012 so rather new when the question was asked) Android has had MediaRouter API. Adding callback for ROUTE_TYPE_LIVE_VIDEO subscribes MediaRouter.Callback.onRoutePresentationDisplayChanged to be called when external display is connected or disconnected. If the app has sound, other option is to track routed output. The output types TYPE_HDMI and TYPE_REMOTE_SUBMIX are used for external display.

Answer 4

I'm not sure what you are trying to achieve, but if you simply want to disable screenshots and such, you can use FLAG_SECURE .

• https://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_SECURE
• http://www.vogella.com/code/ApiDemos/src/com/example/android/apis/app/SecureWindowActivity.html