How to show something on Incoming Call Screen under Delphi 10.2

  

The problem here often appeared, but I didn’t found anything about it for delphi and firemonkey.

I would like to display some information when my application detects an incoming call (Android).
I know it would be best to create my own phone application and set it as the default one.
But Android has Toas and Notification and I thought to use it.

1) I tried to use a toast but did not manage to display information ON THE incoming call screen

2) Notification displays the message but I must first swipe down notification bar. It gives me nothing. I would like information to appear for example like
information about the end of the battery (information available above all screen application)

Is anyone able to tell me something?

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