Geek Answers Handbook

Android Google Map V2: How to change the previous marker icon by clicking on another marker

UPDATE: I solved the performance issue by adding the previousMarker object. Thus, only the previous click marker will be deleted and replaced with the default icon. However, when I click on the marker, the info window still does not appear.

I have a map view and some markers are installed on it. What I want is when I click on the marker, it changes its icon to another icon, and when I click on another marker, the previous marker icon should be replaced with its original one.

I did something like this, but just changes the marker icon whenever I click on the marker.

@Override public boolean onMarkerClick(Marker marker) { //Called when a marker has been clicked or tapped. LatLng markerPos=marker.getPosition(); String markerLocationName=marker.getTitle(); String markerSubCategoryName=marker.getSnippet(); marker.remove(); MarkerOptions markerOptions = new MarkerOptions().position(markerPos) .title(markerLocationName) .snippet(markerSubCategoryName) .icon(BitmapDescriptorFactory.fromResource(R.drawable.new_icon));// Changing marker icon mMap.addMarker(markerOptions); Log.d("marker","change marker icon"); // can open a dialog window here return false; }

So, if I press 2 markers, I will have 2 new icons, meanwhile what I want, only the current clicked marker changes its icon.

So, I also did something like this, adding 2 more lines of code. It successfully accomplishes what I want, but has some flaw (see below).

 @Override public boolean onMarkerClick(Marker marker) { //Called when a marker has been clicked or tapped. mMap.clear(); populateAllMarkersOnMap();//repopulate markers on map LatLng markerPos=marker.getPosition(); String markerLocationName=marker.getTitle(); String markerSubCategoryName=marker.getSnippet(); marker.remove(); //remove the current clicked marker MarkerOptions markerOptions = new MarkerOptions().position(markerPos) .title(markerLocationName) .snippet(markerSubCategoryName) .icon(BitmapDescriptorFactory.fromResource(R.drawable.new_icon));// Changing marker icon mMap.addMarker(markerOptions); //add marker with new icon into map return false; }

The disadvantage is 1 / "disable" the information window (the same thing happens in the first case). 2 / clear all the markers on the map and reinstall all the markers. Imagine I have 100 markers, should this be a performance issue with every click I make?

PopulateAllMarkersOnMap () can be as simple as it is now:

 private void populateAllMarkersOnMap(){ setMarker(latA1, lonA1, "A1","A1.1"); setMarker(latA2, lonA2, "A2","A2.1"); // ... (100 times or populated via a loop) };

So, is there a way to get the previous marker to change its default icon when I click on a new marker? Sorry for my English, if you think I should put another heading for my question, please help.

+7
android google-maps
source share
2 answers

Finally, I found the best and easiest way. I created the previousMarker object and saved the current clicked marker:

 @Override public boolean onMarkerClick(Marker marker) { //Called when a marker has been clicked or tapped. if(previousMarker!=null){ previousMarker.setIcon(BitmapDescriptorFactory.fromResource(R.drawable.dot_icon)); } marker.setIcon(BitmapDescriptorFactory.fromResource(R.drawable.ct_icon)); previousMarker=marker; //Now the clicked marker becomes previousMarker return false; }
+16
source share

You are probably looking for this method, probably

 Called when the marker info window is closed. 
 optional public func mapView(mapView: GMSMapView, didCloseInfoWindowOfMarker marker: GMSMarker)
0
source share

More articles:


All Articles