Android : Android (preference) dialog with string array list and user can add items

I want a Dialog, where the user can add items himself.

For example names:

At first the dialog is empty.

Then the user puts a button and can add an entry.

A long press removes entries.

I want to add this in preference screen.

I think that way would be nicer then make an textfield and the user has to seperate them with ","

Are there any libraries or examples for this?