android-how to remove lines on map -

i'm drawing lines between 2 position on map , works fine .

i need remove them when want draw new line . code :

polylineoptions lineoptions; arraylist<latlng> points = null; for(int i=0;i<result.size();i++){                     points = new arraylist<latlng>();                     list<hashmap<string, string>> path = result.get(i);                     for(int j=0;j<path.size();j++){                         hashmap<string,string> point = path.get(j);                          if(j==0){                                distance = (string)point.get("distance");                                                    continue;                         }else if(j==1){                             duration = (string)point.get("duration");                             continue;                         }                         double lat = double.parsedouble(point.get("lat"));                         double lng = double.parsedouble(point.get("lng"));                         latlng position = new latlng(lat, lng);                          points.add(position);                                            }                 } lineoptions.addall(points);             lineoptions.width(3);             lineoptions.color(color.red); map.addpolyline(lineoptions); 

i tried map.clear() , didn't work . how can clear lines on map ?

thanks you

make arraylist

arraylist<polyline> polylinearraylist; 

in oncreate method

polylinearraylist = new arraylist<polyline>(); 

update code one

// flusing markers drawn (int icount = 0; icount < polylinearraylist.size(); icount++) { polyline polyline = polylinearraylist.get(icount); polyline.remove(); }  polyline mpolyline = null; polylineoptions lineoptions; arraylist<latlng> points = null; for(int i=0;i<result.size();i++){                     points = new arraylist<latlng>();                     list<hashmap<string, string>> path = result.get(i);                     for(int j=0;j<path.size();j++){                         hashmap<string,string> point = path.get(j);                          if(j==0){                                distance = (string)point.get("distance");                                                    continue;                         }else if(j==1){                             duration = (string)point.get("duration");                             continue;                         }                         double lat = double.parsedouble(point.get("lat"));                         double lng = double.parsedouble(point.get("lng"));                         latlng position = new latlng(lat, lng);                          points.add(position);                                            }                 } lineoptions.addall(points);             lineoptions.width(3);             lineoptions.color(color.red); mpolyline = googlemap.addpolyline(lineoptions); 

add polyline arraylist

polylinearraylist.add(mpolyline);