how to remove duplicate contacts from arraylist

Question

I have created an app in which I am getting the contacts from a device. But I want to remove the duplicate contacts from the results.

How could I do it?

Answer 1

• If you want to get rid of duplicates, consider using a HashSet instead.

• If you can't/don't want to use it, simply check before adding whether the contact is already there.

  if (!myList.contains(newContact))
    myList.add(newContact);