CODEWITHSUNDEEP
androidgoogle-mapsmarker
Basit
Basit

Reputation: 113

How to remove specific multiple marker from google map instead of single or all marker

I want to remove multiple specific markers from Google Maps but I can't do it. I already know about marker.remove(); and mMap.clear(); but they don't help me. Look at the code below how I create multiple marker. 

    private ArrayList<String> pup_latList01;
    private ArrayList<String> pup_longList01;
    private ArrayList<String> pup_nameList01;

    for(int i = 0 ;i< pup_nameList01.size();i++)
    {
       LatLng puplatlang = new LatLng(Double.parseDouble(pup_latList01.get(i)),Double.parseDouble(pup_longList01.get(i)));
       pupMarker = mMap.addMarker(new MarkerOptions().position(puplatlang).title(pup_nameList01.get(i)).draggable(true).icon(bitmapDescriptorFromVector(MapsActivity.this, R.drawable.bus_stop_small)));
    }

I want to remove marker only from create from pupMarker Marker object.
I also have other marker created from other objects. When I use pupMarker.remove(); it removes only last created marker from above code and mMap.clear(); removes all markers from the map.

Upvotes: 1

Views: 1495

Answers (2)

Davis
Davis

Reputation: 137

When you create a marker with googleMap.addMarker(...), you receive a Marker object, which represents it. That is, each marker object for each marker on the map.

So, for example, you would add markers you like in a specific list group.

Steps:

  1. Create a list of type List, for example.
  2. For each marker you receive on googleMap.addMarker(...) add it on the list.
  3. For clear all those specificis markers loop the list with a for each and use the Marker.remove(); method.
  4. Clear the list with List.clear();

Upvotes: 2

Alex
Alex

Reputation: 972

In this code pupMarker is always the last marker on the list. So when you use pupMarker.remove(); it only removes the last created marker. You can make a List that will hold all these Markers and then get the one you want to remove.

Edit 1:

It's probably better to use HashMap instead of List for holding references to Markers. It will be easier later to find it with a key in the Map.

Edit 2:

Example of this as requested in the comment:

private HashMap<Integer, Marker> hashMapMarker = new HashMap<>();

for(int i = 0 ;i< pup_nameList01.size();i++)
       {
       LatLng puplatlang = new LatLng(Double.parseDouble(pup_latList01.get(i)),Double.parseDouble(pup_longList01.get(i)));
       Marker pupMarker = mMap.addMarker(new MarkerOptions().position(puplatlang).title(pup_nameList01.get(i)).draggable(true).icon(bitmapDescriptorFromVector(MapsActivity.this, R.drawable.bus_stop_small)));
hashMapMarker.put(i, pupMarker);
       }

Note that if using Integer for a key is probably better to use SparseArray instead of HashMap.

private void removeMarker(int position){
     hashMapMarker.get(positon).remove();
     hashMapMarker.remove(position);
}

Upvotes: 1

Related Questions