Android: AutoCompleteTextView and Filter - Typing Delay - Why?

Question

Alright guys, this is driving me crazy and I cannot find a solution on the internet!
I did a new Eclipse project and pasted this code inside:

https://developers.google.com/places/training/autocomplete-android

It works, but if I enter or delete (a) character(s) there is mostly a delay(short freeze) while typing them and the suggestions-dropdown disappears and appears again mostly.
As for my understanding, the filtering itself is done asynchronously, hence from a background thread, so why the short freezes?

My goal is to have a freeze-free AutoCompleteTextView like in Google Play Store.
So do you guys have any advices/workarounds for achieving this?

Answer 1

I solved it by placing these lines of code (see comments):

            @Override
            protected FilterResults performFiltering(CharSequence constraint)
            {
                FilterResults filterResults = new FilterResults();

                // ADDED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
                ArrayList <String> resultListTemp = new ArrayList <String> ();

                if (constraint != null)
                {
                    // ADDED CODE: TO STOP TYPING DELAY & TO FIX ERROR: "The content of adapter has changed but ListView did not receive a notification"
                    if (conn != null)
                    {
                        conn.disconnect();
                    }

                    // CHANGED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
                    resultListTemp.addAll(autocomplete(constraint.toString()));

                    filterResults.values = resultListTemp;
                    filterResults.count = resultListTemp.size();
                }
                return filterResults;
            }


            @Override
            protected void publishResults(CharSequence constraint, FilterResults results)
            {
                // ADDED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
                resultList = (ArrayList <String>) results.values;

                if (results != null && results.count > 0)
                {
                    notifyDataSetChanged();
                }
                else
                {
                    notifyDataSetInvalidated();
                }
            }


            private ArrayList<String> autocomplete(String input)
            {
                // CHANGED CODE: TO FIX ERROR "The content of the adapter has changed but ListView did not receive a notification":
                ArrayList<String> resultList = new ArrayList <String> ();
                .....
                .....
            }

Where "conn" is the HttpURLConnection for fetching the Google Places data.