title: How to disable screen mirroring?
body: <p>How to block the app to screen mirroring?
  As i check the <a href="https://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_SECURE" rel="noreferrer">FLAG_SECURE</a>, </p>
  
  <blockquote>
    <p>Window flag: treat the content of the window as secure, preventing it
    from appearing in screenshots or from being viewed on non-secure
    displays.</p>
  </blockquote>
  
  <p>The <strong>from being viewed on non-secure displays</strong> is to block screen mirroring? if not, what does it means? And whether we can find some way to prevent the app from the screen mirroring?</p>