prevent audio recording while screen recording in Android apps

Question

I'm developing an secure application where i'm restricting another application to record the moment of my application (like videos).

The think is i had restricted the screen capture (both screenshot and video recording) of my application as stated here, but i cant able to restrict the audio of my application's video.

   @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
    setContentView(R.layout.activity_main);
    playVideo();
    //callAPI();
}

After screen capturing i can't able to see the video (shows black screen) but i can hear the audio.

Please help me to get out of this.

Thanks in advance

Possible duplicate of [How to prevent Screen Capture in Android](https://stackoverflow.com/questions/28606689/how-to-prevent-screen-capture-in-android) — akhilesh0707, Oct 03 '17 at 09:57
In that link they have mentioned about the video only. I can do that. But my question here is how to prevent voice from recording — Gobinath Nataraj, Oct 03 '17 at 10:04
@akhilesh0707 He is not ask about screen capture.. He ask about sound capture — Ranjithkumar, Oct 03 '17 at 13:35
Pls check this answer. I got solution. https://stackoverflow.com/a/46659636/3879847 — Ranjithkumar, Oct 12 '17 at 07:47
@RanjithKumar but this link is about MIC audio recording not software audio recording. — Sorry IwontTell, Nov 30 '20 at 07:31

Mahmoud Mabrok · Answer 1 · 2021-02-24T14:59:36.097

you must detect first that a recording is started

you can achieve this by register display listener


 val displayManager = getSystemService(Context.DISPLAY_SERVICE) as? DisplayManager
        displayManager?.registerDisplayListener(listener, null)
       

    val listener = object : DisplayManager.DisplayListener {
        override fun onDisplayChanged(displayId: Int) {
            
        }

        override fun onDisplayAdded(displayId: Int) {
            
            // here stop video player 
        }

        override fun onDisplayRemoved(displayId: Int) {
          
        }
    }

FLAG_SECURE will make screen recording record a blank screen

Hint: this way only work if recording starts while activity is in foreground

UPDATE 1

The next workaround will work with most of third party recording apps before android 10:

by using AudioManager to mute mic, as these apps use mic

worked but under condition screen recording app start recording while your app is running and in foregground, otherwise it has no effect — Mahmoud Mabrok, Feb 24 '21 at 14:57
Thanks for ur reply. may be it'll work with external recorders what about built in recorders? from which we start recording from top menu? — Muhammad Adeel Shoukat, Feb 24 '21 at 15:07

prevent audio recording while screen recording in Android apps

1 Answers1

UPDATE 1