Android Code Snippet Disable screenshot & screen recording

This method works in Android 3 to 15

For Activity this way:

Sub DisableScreenCapture
  Dim r As Reflector
  Dim act As Object = r.GetActivity
  Dim jo As JavaObject = act
  Dim window As JavaObject = jo.RunMethod("getWindow", Null)
  window.RunMethod("setFlags", Array(0x00002000, 0x00002000))
End Sub

Sub EnableScreenCapture
  Dim r As Reflector
  Dim act As Object = r.GetActivity
  Dim jo As JavaObject = act
  Dim window As JavaObject = jo.RunMethod("getWindow", Null)
  window.RunMethod("clearFlags", Array(0x00002000))
End Sub

and for B4XPages:

Sub DisableScreenCapture
    Dim act As JavaObject = B4XPages.GetNativeParent(Me)
    Dim window As JavaObject = act.RunMethod("getWindow", Null)
    window.RunMethod("setFlags", Array(0x00002000, 0x00002000))
End Sub

Sub EnableScreenCapture
    Dim act As JavaObject = B4XPages.GetNativeParent(Me)
    Dim window As JavaObject = act.RunMethod("getWindow", Null)
    window.RunMethod("clearFlags", Array(0x00002000))
End Sub

✔ Recommended usage inside a Page​

Sub B4XPage_Appear
    DisableScreenCapture
End Sub

Sub B4XPage_Disappear
    EnableScreenCapture
End Sub

Notes​

• Works in all B4XPages projects
• Protects screenshots, screen recording, and Recents preview
• Tested on real devices, including Xiaomi HyperOS

Feel free to use or modify this code in your projects.