Should I actually remove the ValueEventListener?

Question

        DatabaseReference Ref = FirebaseDatabase.getInstance().getReference(Constants.Client + \"/\" + path);
        Ref.keepSynced(true);
        Ref.addValueEvent         


        

Answer 1

To remove the ValueEventListener, you can then do this:

Remove the anonymity of the listener.

Change the code from this:-

      Ref.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });

into this:

   ValueEventListener listener= new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
Ref.addValueEventListener(listener);

---

Now you will be able to remove the listener:

   @Override
public void onDestroy() {
if (Ref != null && listener != null) {
   Ref.removeEventListener(listener);
    }
 }

You need to remove it, so the listener does not stay running in the other activity lifecycles like onDestroy()