Android : How to manage multiple activities with the same name inside an app

I am currently writing an Android app to work as an activity launcher.

The main activity works as launcher and will let users launches a new activity from the main activity(here I create this new activity using FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_MULTIPLE_TASKS).

So that I can hold multiple these activities with the same name but different content in the background.

But I still need a method to manage them, which means I can offer a UI for user to choose to restart which and kill which.

Can someone give me a good solution?

I appreciate your help very much!