How to remove specific marker on Android GoogleMap

Question

CODE:

private Marker mCurrentMarker;
private ArrayList<Marker> mMarkerArrayList;

@Override
    public void onMapReady(final GoogleMap googleMap) {
        mGoogleMap = googleMap;

        mMarkerArrayList = new ArrayList<>();
        googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
            @Override
            public void onMapClick(LatLng point) {

                MarkerOptions marker_onclick = new MarkerOptions().position(
                        new LatLng(point.latitude, point.longitude)).title(getString(R.string.now_your_location));
                if (mMarkerArrayList.size() > 0){
                    Marker marker_to_remove = mMarkerArrayList.get(0);
                    marker_to_remove.remove();
                }

                mCurrentMarker = mGoogleMap.addMarker(marker_onclick);

                mGoogleMap.addMarker(marker_onclick);
                mMarkerArrayList.add(mCurrentMarker);

            }
        });
    }

I want that when I click on the map, there will be a marker related in showing clicked location. And marker which has been before being removed. So, there is only one marker related to showing clicked location.

I already know mGoogleMap.clean(); can clean map, also markers on the map.

But I want to remove specific marker. (Because, On my application, there are many kinds of markers. For example, a home marker is showing where the user's home is, and the bus stop marker is showing where the bus stop is.)

So I made ArrayList and tried to use it.

But it didn't work.

I think when i click on map, addmarker(); is working well but .remove(); seems to be not working.

Where is the error?

How can I remove specific marker only?

I read: How to remove the marker in Google map v2?

Answer 1

When you add a marker on Map, you can store it into HashMap like this:

 HashMap<YourUniqueKey,Marker> hashMapMarker = new HashMap<>();
 Marker marker = googleMap.addMarker(markerOptions);
 hashMapMarker.put(YourUniqueKey,marker);

At the time you want to delete particular marker just get your Maker by YourUniqueKey for that marker like this:

Marker marker = hashMapMarker.get(YourUniqueKey);
marker.remove();
hashMapMarker.remove(YourUniqueKey);