Recommended way for handling multiple markers

[Carlos Cesar Caballero Díaz]

Hi, I am new with mapsforge, I have an offline maps application based on
osmdroid and I am migrating it to mapsforge.

The app uses multiple markers and they are included or removed from the
map using a search filter. With osmdrod I use an
ItemizedOverlayWithFocus for handling the markers independently from
other overlay layers (map, GPS position, etc...), so I can clean, remove
or add markers to the ItemizedOverlay list without taking care of the
other overlays.

With mapsforge there is a Marker object and I can include it to the
Layers list using add(), but is a little difficult to handle removing or
adding markers if they are in the same list as other overlays like map
or GPS position.

Is there a better way for handling my markers and only my markers?

Thank you so much.

[Emux]

You can use a GroupLayer, to see its usage check PoiSearchViewer here.

An alternative always is to keep track of markers or even extend Marker and store some id, which can be used then for removal of specific markers.

--
Emux

[Carlos Cesar Caballero Díaz]

Thanks Emux, I can easily handle multiple markers now, but this brings me to a new issue, if I use code like this inside a loop for assigning tap events to markers (MarkerBusiness is inheriting from Marker):

markersLayers.layers.add(new MarkerBusiness(b){
    @Override
    public boolean onTap(LatLong geoPoint, Point viewPosition, Point tapPoint) {
        Utils.hideKeyboard(activity);
        Log.e("AKAKAK", "onTap: "+this.business.getName() );
        detailsLayout.startDetaislLayout(this.business);
        return true;
    }
});

The event is triggered when I tap any place of the map with the last marker data. I seems that the marker event is applied to the whole GroupLayer

Greetings.

El 27/09/17 a las 09:42, Emux escribió:

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[Emux]

GroupLayer does not consume any touch events, it just propagates them to its children.
They're responsible, if each one consumes them or not (by returning true).

You can test the PoiSearchViewer sample to see them in action.

Also what do you log there?
Any marker details should be stored per marker, not globally, e.g. (this.business.getName()) if that's what you mean.

--
Emux

[Carlos Cesar Caballero Díaz]

Emux, thanks again for your answer, if I use Circle as GroupLayer elements, there is no problem with the tap events, but if I use Marker, then for some reason the issue appears.

Greetings.

El 27/09/17 a las 13:31, Emux escribió:

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[Emux]

I updated the POI Search sample to use markers, can you have a look?

--
Emux

[Carlos Cesar Caballero Díaz]

Thank you so much Emux, problem solved, I was ignoring the "if (contains(layerXY, tapXY))" condition and that was causing the weird tap event behavior.

Greetings.

El 29/09/17 a las 08:28, Emux escribió:

I updated the POI Search sample to use markers, can you have a look?

--
Emux

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