Remove a marker from a GoogleMap

Question

In the new Google Maps API for Android  we can add a marker  but there is no way to  easily  remove one   My solution is to keep the markers in a map and redraw the map when I want to remove a marker  but it is not very efficient   private final Map lt String  MarkerOptions gt  mMarkers   new ConcurrentHashMap lt String  MarkerOptions gt      private void add String name  LatLng ll      final MarkerOptions marker   new MarkerOptions   position ll  title name     mMarkers put name  marker      runOnUiThread new Runnable          Override     public void run           mMap addMarker marker                  private void remove String name      mMarkers remove name      runOnUiThread new Runnable          Override     public void run           mMap clear           for  MarkerOptions item   mMarkers values              mMap addMarker item                           Does anyone have a better idea

User · Answer

if marker exist remove last marker  if marker  does not exist create current marker  Marker currentMarker   null  if  currentMarker  null        currentMarker remove        currentMarker null     if  currentMarker  null        currentMarker   mMap addMarker new MarkerOptions   position arg0       icon BitmapDescriptorFactory defaultMarker BitmapDescriptorFactory HUE GREEN

User · Answer

Add the marker to the map like this  Marker markerName   map addMarker new MarkerOptions   position latLng  title  Title       Then you ll be able to use the remove method  it will remove only that marker  markerName remove

User · Answer

For those that are following the example on this GoogleMaps - MapWithMarker project  you may remove the marker by doing so override fun onMapReady googleMap  GoogleMap         googleMap  apply               Remove marker         clear            val sydney   LatLng -33 852  151 211          addMarker              MarkerOptions                    position sydney                   title  quot Marker in Sydney quot                     moveCamera CameraUpdateFactory newLatLng sydney

User · Answer

Just a NOTE  something that I wasted hours tracking down tonight     If you decide to hold onto a marker for some reason  after you have REMOVED it from a map     getTag will return NULL  even though the remaining get values will return with the values you set them to when the marker was created     TAG value is set to NULL if you ever remove a marker  and then attempt to reference it   Seems like a bug to me

User · Answer

Make a global variable to keep track of marker       private Marker currentLocationMarker      Remove old marker              if  null    currentLocationMarker                    currentLocationMarker remove                       Add updated marker in and move the camera              currentLocationMarker   mMap addMarker new MarkerOptions   position                      new LatLng getLatitude    getLongitude                          title  You are now Here   visible true                       icon Utils getMarkerBitmapFromView getActivity    R drawable auto front                        snippet  Updated Location                  currentLocationMarker showInfoWindow

User · Answer

Create array with all markers on add in map   Later  use   Marker temp   markers get markers size   - 1   temp remove

User · Answer

If you use Kotlin language you just add this code   Create global variables of GoogleMap and Marker types   I use variable marker to make variable marker value can change directly  private lateinit var map  GoogleMap private lateinit var marker  Marker   And I use this function method to add the marker on my map   private fun placeMarkerOnMap location  LatLng        val markerOptions   MarkerOptions   position location      val titleStr   getAddress location      markerOptions title titleStr      marker   map addMarker markerOptions      After I create the function I place this code on the onMapReady   to remove the marker and create a new one   map setOnMapClickListener   location - gt          map clear           marker remove           placeMarkerOnMap location          It s bonus if you want to display the address location when you click the marker add this code to hide and show the marker address but you need a method to get the address location  I got the code from this post  How to get complete address from latitude and longitude   map setOnMarkerClickListener  marker - gt          if  marker isInfoWindowShown               marker hideInfoWindow            else              marker showInfoWindow                     true

User · Answer

The method signature for addMarker is   public final Marker addMarker  MarkerOptions options    So when you add a marker to a GoogleMap by specifying the options for the marker  you should save the Marker object that is returned  instead of the MarkerOptions object that you used to create it    This object allows you to change the marker state later on   When you are finished with the marker  you can call Marker remove   to remove it from the map   As an aside  if you only want to hide it temporarily  you can toggle the visibility of the marker by calling Marker setVisible boolean

User · Answer

to clear all scribbles in the map use   map clear

User · Answer

Try this  it is updating the current location  and it works fine          public void onLocationChanged  NonNull Location location                             here we update the location on the map                  LatLng myActualLocation   new LatLng location getLatitude    location getLongitude                      if  markerName  null       marker name is declared as a gloval variable              markerName remove                               markerName   mMap addMarker new MarkerOptions   position myActualLocation  title  quot Marker Miami quot   icon BitmapDescriptorFactory defaultMarker BitmapDescriptorFactory HUE ORANGE                         mMap addMarker new MarkerOptions   position myActualLocation  title  quot Marker Miami quot   icon BitmapDescriptorFactory defaultMarker BitmapDescriptorFactory HUE ORANGE             mMap moveCamera CameraUpdateFactory newLatLngZoom myActualLocation 18

User · Answer

use the following code    mMap setOnMarkerClickListener new GoogleMap OnMarkerClickListener             Override        public boolean onMarkerClick Marker marker                marker remove               return true                    once you click on  a marker   you can remove it

User · Answer

1  If you want to remove a marker you can do it as marker remove        alternatively you can also hide the marker instead of removing it as   marker setVisible false     and make it visible later whenever needed   2  However if you want to remove all markers from the map Use map clear    Note  map clear    will also remove Polylines  Circles etc  3  If you not want to remove Polylines  Circles etc  than use a loop to the length of marker  if you have multiple markers  to remove those Check out the Example here OR set them Visible false And do not use  map clear    in such case

[android] Remove a marker from a GoogleMap

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