Simple Android App using Firebase Realtime Database - ValueEventListener

NotesPresenter.java

ValueEventListener valueEventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        ArrayList<Note> notes = new ArrayList<Note>();

        for (DataSnapshot noteSnapshot: dataSnapshot.getChildren()) {
            Note note = noteSnapshot.getValue(Note.class);
            notes.add(note);
        }

        notesView.refreshNoteList(notes);
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {
        Log.w(TAG, "loadNote:onCancelled", databaseError.toException());
    }
};

mNoteRef.orderByKey().addValueEventListener(valueEventListener);