CODEWITHSUNDEEP
javaandroidgoogle-mapsandroid-studiogoogle-maps-markers
Banana
Banana

Reputation: 2443

Allow only a certain number of markers in google maps

I am playing with google maps (android studio), and trying to limit the number of markers a single user can pin. I couldn't find any examples online, only thing I could find is removing the current marker (code below).

My goal is to allow the user to pin only 3 markers.

     mMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

        @Override
        public void onMapLongClick(LatLng arg0) {
            //if there is a marker already this if condition removes it
            if (marker != null) {
                marker.remove();
            }
            marker = mMap.addMarker(new MarkerOptions()
                    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker_02))
                    .position(
                            new LatLng(arg0.latitude,
                                    arg0.longitude))
                    .draggable(true).visible(true));
        }
    });

Upvotes: 0

Views: 676

Answers (2)

Banana
Banana

Reputation: 2443

Edited Shvet's code a little bit. After pinning 3 markers user is unable to pin fourth, and he gets a quick message.

int markerCount = 0; //marker counter

mMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

    @Override
    public void onMapLongClick(LatLng arg0) {
        if (markerCount < 3) {
            markerCount = markerCount+ 1;
            marker = mMap.addMarker(new MarkerOptions()
                    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
                    .position(new LatLng(arg0.latitude, arg0.longitude))
                    .draggable(true)
                    .visible(true));
        } else {
            Toast.makeText(getApplicationContext(), "Only 3 markers allowed!",
                    Toast.LENGTH_LONG).show();
        }
    }
}

Upvotes: 0

Shvet Chakra
Shvet Chakra

Reputation: 1043

    int marker_count=0;   
     mMap.setOnMapLongClickListener(new GoogleMap.OnMapLongClickListener() {

                @Override
                public void onMapLongClick(LatLng arg0) {
                    if(marker_count<3){
    //if there is a marker already this if condition removes it

                   if (marker != null) {
                        marker.remove();
marker_count=marker_count-1;
                    }
marker_count=marker_count+1;
                    marker = mMap.addMarker(new MarkerOptions()
                            .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker_02))
                            .position(
                                    new LatLng(arg0.latitude,
                                            arg0.longitude))
                            .draggable(true).visible(true));
                }}
    else{
    //toast a message
    }
            });

Upvotes: 3

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