Interactive search of places... help required.

[romanca...@gmail.com]

hi shail!

im facing a problem of performance when i tryed to implement and interactive search of addresses against google maps or openstreet.

the problem is the performance that differs so much than the native applications that uses that functionlaty, and i think that the problems is because on each character typed the function make the query with the new character but the prior querys still returning data. 

have you any idea to increase the performance? is a way of solution to kill the connectionrequest that becomes old because the new character introduced? 

thanks!

this is my code:

        ArrayList records = new ArrayList();

//        records.clear();

        //    getMarkers();

        if (text.length() > 3) {

            Map<String, Object> result;

            ArrayList tmpResult;

        try {

            ConnectionRequest r = new ConnectionRequest();

            r.setPost(false);

            r.setUrl("https://nominatim.openstreetmap.org/search.php");

            r.addArgument("q", text);

            r.addArgument("format", "json");

            r.addArgument("addressdetails", "1");

          //  r.addArgument("limit", "1");

            r.setDuplicateSupported(false);

            r.setCacheMode(ConnectionRequest.CachingMode.SMART);

            NetworkManager.getInstance().addToQueueAndWait(r);

            result = new JSONParser().parseJSON(new InputStreamReader(new ByteArrayInputStream(r.getResponseData()), "UTF-8"));

            tmpResult = (ArrayList) Result.fromContent(result).getAsArray("//root").get(0);

            for (Object s : tmpResult) {

                HashMap item = ((HashMap) s);

                Place auxPlace = new Place();

                Coord newCoord = new Coord(

                        Double.valueOf(item.get("lat").toString()),

                        Double.valueOf(item.get("lon").toString())

                );

                auxPlace.setPlaceName(item.get("display_name").toString());

                auxPlace.setCoords(newCoord);

                auxPlace.setPlace_id(item.get("place_id").toString());

                records.add(auxPlace);

            }

        } catch (UnsupportedEncodingException ex) {

//                Logger.getLogger(SearchLayer.class.getName()).log(Level.SEVERE, null, ex);

        } catch (IOException ex) {

            //              Logger.getLogger(SearchLayer.class.getName()).log(Level.SEVERE, null, ex);

        } catch (IndexOutOfBoundsException ex) {

            //              Logger.getLogger(SearchLayer.class.getName()).log(Level.SEVERE, null, ex);

        }

     

        return records;

    }

[Shai Almog]

Hi,

this is a problem I dealt with in the Uber clone code: https://www.amazon.com/Create-Uber-Clone-Days-mobile-ebook/dp/B07FRXZRRV/

I didn't search based on a text field event instead I set a timer. If a timer already exists you cancel it. Otherwise when it elapses a search is sent.

I also added caching to prevent duplicate requests e.g. if a user deletes a character etc.

[milo roconga]

Have you a sample of the code?? That technique makes the difference?

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[Shai Almog]

It's in the book/course. It's not trivial and includes some moving parts.