@Nullable @Override public View onCreateView(
@NonNull LayoutInflater inflater,
@Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_notifications, container, false); username = getActivity().findViewById(R.id.username); mAuth = FirebaseAuth.getInstance(); currentUser = mAuth.getCurrentUser(); reference = FirebaseDatabase.getInstance().getReference("Users").child(currentUser.getUid()); reference.addValueEventListener(new ValueEventListener() {
@Override public void onDataChange(
@NonNull DataSnapshot dataSnapshot) { Users users = dataSnapshot.getValue(Users.class); username.setText(users.getUsername()); }
@Override public void onCancelled(
@NonNull DatabaseError databaseError) { } }); return rootView; }