removing markers in mapquest android (clearing map) -
i'm using mapquest android in application, can display markers, want able display 2 markers each time, removing existing markers if have displayed two. know how can ? here code
mainactivity.java
public class mainactivity extends navigationintentdemo { arraylist<geopoint> points = new arraylist<geopoint>(); arraylist<geopoint> routedata = new arraylist<geopoint>(); jsonparser parser = new jsonparser(); /** * initialize map. */ @override protected void init() { setupmapview(new geopoint(40.25f, 116.5f), 12); touchoverlay overlay = new touchoverlay(); map.getoverlays().add(overlay); } /** * construct simple line overlay display on map , add overlaytaplistener * respond tap events. * */ private void showlineoverlaywithpoints(arraylist<geopoint> routedata) { paint paint = new paint(paint.anti_alias_flag); paint.setcolor(color.red); paint.setalpha(100); paint.setstyle(paint.style.stroke); paint.setstrokejoin(paint.join.round); paint.setstrokecap(paint.cap.round); paint.setstrokewidth(10); lineoverlay line = new lineoverlay(paint); line.setdata(routedata); line.setshowpoints(true, null); line.setkey("line #2"); line.settoucheventlistener(new lineoverlay.overlaytoucheventlistener() { @override public void ontouch(motionevent evt, mapview mapview) { toast.maketext(getapplicationcontext(), "line touch!", toast.length_short).show(); } }); this.map.getoverlays().add(line); this.map.invalidate(); } /** * crude way launch navigation various locations based on clicking on map. * */ private class touchoverlay extends overlay { @override public boolean ontouchevent(motionevent event, final mapview mapview) { drawable icon = getresources().getdrawable(r.drawable.location_marker); defaultitemizedoverlay poioverlay = new defaultitemizedoverlay(icon); if(event.getaction() == motionevent.action_down) { geopoint p = mapview.getprojection().frompixels((int)event.getx(), (int)event.gety()); toast.maketext(getapplicationcontext(), p.getlatitude() + "," + p.getlongitude(), toast.length_long).show(); if(points.size()<2) { points.add(p); // set geopoints , title/snippet used in annotation view poioverlay.additem(new overlayitem(p, "blabla", "blabla")); if (points.size() == 2) { routedata = parser.getroute( points.get(0).getlongitude(), points.get(0).getlatitude(), points.get(1).getlongitude(), points.get(1).getlatitude(), "sps"); if (routedata != null) showlineoverlaywithpoints(routedata); else log.e("error","route data error"); } else exit(0); /* poioverlay.setonfocuschangelistener(new itemizedoverlay.onfocuschangelistener() { @override public void onfocuschanged(itemizedoverlay overlay, overlayitem newfocus) { // when focused item changes, recenter map , show info map.getcontroller().animateto(newfocus.getpoint()); toast.maketext(map.getcontext().getapplicationcontext(), newfocus.gettitle() + ": " + newfocus.getsnippet(), toast.length_short).show(); } });*/ map.getoverlays().add(poioverlay); return true; } else { points.clear(); } } return false; } private void exit(int i) { // todo auto-generated method stub } } } navigationintentdemo
public class navigationintentdemo extends mapactivity { protected mapview map; protected mylocationoverlay mylocationoverlay; protected button followmebutton; /** * called when activity first created. * */ @override public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(getlayoutid()); followmebutton=(button)findviewbyid(r.id.followmebutton); followmebutton.setonclicklistener(new view.onclicklistener() { @override public void onclick(view v) { mylocationoverlay.setfollowing(true); } }); setupmapview(new geopoint(40.25f, 116.5f), 12); setupmylocation(); init(); } /** * initialize view. */ protected void init() { this.setupmapview(new geopoint(40.25f, 116.5f), 12); } protected void setupmylocation() { this.mylocationoverlay = new mylocationoverlay(this, map); mylocationoverlay.enablemylocation(); mylocationoverlay.runonfirstfix(new runnable() { @override public void run() { geopoint currentlocation = mylocationoverlay.getmylocation(); map.getcontroller().animateto(currentlocation); map.getcontroller().setzoom(14); map.getoverlays().add(mylocationoverlay); mylocationoverlay.setfollowing(true); } }); } /** * set basic mapquest map zoom controls */ protected void setupmapview(geopoint pt, int zoom) { this.map = (mapview) findviewbyid(r.id.map); // set zoom level map.getcontroller().setzoom(zoom); // set center point map.getcontroller().setcenter(pt); // enable zoom controls map.setbuiltinzoomcontrols(true); } /** * id of layout file. * @return */ protected int getlayoutid() { return r.layout.activity_main; } @override protected boolean isroutedisplayed() { return false; } /** * utility method getting text of edittext, if no text entered hint returned * @param edittext * @return */ public string gettext(edittext edittext){ string s = edittext.gettext().tostring(); if("".equals(s)) s=edittext.gethint().tostring(); return s; } /** * hides softkeyboard * @param v */ public void hidesoftkeyboard(view v){ //hides soft keyboard final inputmethodmanager imm = (inputmethodmanager)getsystemservice( context.input_method_service); imm.hidesoftinputfromwindow(v.getwindowtoken(), 0); } } thank you
Comments
Post a Comment