How to implement interaction with notifications?

Question

Java

How can you view and interact with all user notifications?
I am interested in the implementation on QT, JAVA, IOS.
I do not need a working solution, just tell me where to dig so that I can interact with all user notifications on Android or IOS.
That is, have access to delete, change, add notifications (including those not from my application).

Answer 1

Here is an example