Android Google Map routing -
hi first time using map in android after changing in google map api.
now wants draw route on map between 2 addresses endered me api v2. don't know how this. tried lot this. please me. thanks.
my code is:
protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); requestwindowfeature(window.feature_no_title); setcontentview(r.layout.start_trip_view); try { arraylist<string> location = new arraylist<string>(); intent ii = getintent(); location2 = (ii.getstringextra("place")); string location3 = (ii.getstringextra("start")); gps = new gpstracker(getapplicationcontext()); latitude = gps.getlatitude(); longitude = gps.getlongitude(); balvinder = new latlng(latitude, longitude); markerpoints = new arraylist<latlng>(); map = ((mapfragment) getfragmentmanager() .findfragmentbyid(r.id.map)).getmap(); map.setmylocationenabled(true); // if (location == null || location.equals("")) { toast.maketext(getbasecontext(), "no place entered", toast.length_short).show(); return; } string url = "https://maps.googleapis.com/maps/api/geocode/json?"; // for(int i=0; i<location.size();i++) // { try { // encoding special characters space in user input // place location2 = urlencoder.encode(location2, "utf-8"); // location3 = urlencoder.encode(location3, "utf-8"); string saddress = "address=" + location2; // string dsaddress = "address=" + location3; string sensor = "sensor=false"; // url , geocoding data fetched url = url + saddress + "&" + sensor; downloadtask downloadtask = new downloadtask(); // start downloading geocoding places downloadtask.execute(url); } private string downloadurl(string... strurl) throws ioexception { string data = ""; inputstream istream = null; httpurlconnection urlconnection = null; try { for(int i=0;i<strurl.length;i++) { url url = new url(strurl[i]); // creating http connection communicate url urlconnection = (httpurlconnection) url.openconnection(); // connecting url urlconnection.connect(); // reading data url istream = urlconnection.getinputstream(); bufferedreader br = new bufferedreader(new inputstreamreader( istream)); stringbuffer sb = new stringbuffer(); string line = ""; while ((line = br.readline()) != null) { sb.append(line); } data = sb.tostring(); br.close(); } } catch (exception e) { log.d("exception while downloading url", e.tostring()); } { istream.close(); urlconnection.disconnect(); } return data; } // fetches data url passed private class downloadtask extends asynctask<string, integer, string> { string data = null; // invoked execute() method of object @override protected string doinbackground(string... url) { try { for(int i=0;i<url.length;i++) { data = downloadurl(url[i]); } } catch (exception e) { log.d("background task", e.tostring()); } return data; } // executed after complete execution of doinbackground() method @override protected void onpostexecute(string result) { // instantiating parsertask parses json data // geocoding webservice // in non-ui thread parsertask parsertask = new parsertask(); parsertask.execute(result); } system.out.println("result"+result); } } /** class parse google places in json format */ class parsertask extends asynctask<string, integer, list<hashmap<string, string>>> { jsonobject jobject; // invoked execute() method of object @override protected list<hashmap<string, string>> doinbackground( string... jsondata) { list<hashmap<string, string>> places = null; geocodejsonparser parser = new geocodejsonparser(); try { jobject = new jsonobject(jsondata[0]); /** getting parsed data arraylist */ places = parser.parse(jobject); } catch (exception e) { log.d("exception", e.tostring()); } return places; } // executed after complete execution of doinbackground() method @override protected void onpostexecute(list<hashmap<string, string>> list) { polylineoptions lineoptions = new polylineoptions(); arraylist<latlng>points=new arraylist<latlng>(); // clears existing markers map.clear(); (int = 0; < list.size(); i++) { // creating marker markeroptions markeroptions = new markeroptions(); // getting place places list hashmap<string, string> hmplace = list.get(i); // getting latitude of place lat = double.parsedouble(hmplace.get("lat")); // getting longitude of place lng = double.parsedouble(hmplace.get("lng")); // getting name string name = hmplace.get("formatted_address"); latlng = new latlng(lat, lng); // setting position marker markeroptions.position(latlng); // getdirectionsurl(balvinder, latlng); // markeroptions.position(balvinder); .show(); map.addmarker(new markeroptions().title("my location").snippet( gps.convertpointtolocation(latitude, longitude, starttripview.this)) .position(balvinder) .icon(bitmapdescriptorfactory .fromresource(r.drawable.logo_sono))); markerpoints.add(balvinder); markerpoints.add(latlng); //makeurl(latitude, longitude, lat, lng); system.out.println("result"+makeurl(latitude, longitude, lat, lng)); // polyline line = map.addpolyline(new polylineoptions() // .add(balvinder, latlng) // .width(5) // .color(color.red).geodesic(true)); markeroptions.title(name); // map.addmarker(markeroptions); if (i == 0){ map.animatecamera(cameraupdatefactory.newlatlng(latlng)); } } } }
documentation: https://developers.google.com/maps/documentation/android/shapes?hl=fr#polylines
to draw route between 2 locations, should use polyline:
// instantiates new polyline object , adds points define rectangle polylineoptions rectoptions = new polylineoptions() .add(new latlng(37.35, -122.0)) .add(new latlng(37.45, -122.0)) // north of previous point, @ same longitude .add(new latlng(37.45, -122.2)) // same latitude, , 30km west .add(new latlng(37.35, -122.2)) // same longitude, , 16km south .add(new latlng(37.35, -122.0)); // closes polyline. // mutable polyline polyline polyline = mymap.addpolyline(rectoptions); in case won't need last point close polyline.
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