Showing custom InfoWindow for Android Maps Utility Library for Android

Question

I\'m using the library Google Maps Utility for Android which allows to create clustering int he maps and I need to show a custom InfoWindow but I can\'t find an

Answer 1

Yes, this can be done. ClusterManager maintains two MarkerManager.Collections:

• one for cluster markers, and
• one for individual item markers

You can set a custom InfoWindowAdapter for each of these kinds of markers independently.

---

Implementation

First, install your ClusterManager's MarkerManager as the map's InfoWindowAdapter:

ClusterManager clusterMgr = new ClusterManager(context, map);
map.setInfoWindowAdapter(clusterMgr.getMarkerManager());

Next, install your custom InfoWindowAdapter as the adapter for one or both of the marker collections:

clusterMgr.getClusterMarkerCollection().setOnInfoWindowAdapter(new MyCustomAdapterForClusters());
clusterMgr.getMarkerCollection().setOnInfoWindowAdapter(new MyCustomAdapterForItems());

The final piece is mapping the raw Marker object that you'll receive in your custom InfoWindowAdapter's callback to the ClusterItem object(s) that you added to the map in the first place. This can be achieved using the onClusterClick and onClusterItemClick listeners, as follows:

map.setOnMarkerClickListener(clusterMgr);
clusterMgr.setOnClusterClickListener(new OnClusterClickListener() {
    @Override
    public boolean onClusterClick(Cluster cluster) {
        clickedCluster = cluster; // remember for use later in the Adapter
        return false;
    }
});
clusterMgr.setOnClusterItemClickListener(new OnClusterItemClickListener() {
    @Override
    public boolean onClusterItemClick(MarkerItem item) {
        clickedClusterItem = item;
        return false;
    }
});

---

Now you have everything you need to assemble your custom InfoWindow content in your respective Adapters! For example:

class MyCustomAdapterForClusters implements InfoWindowAdapter {
    @Override
    public View getInfoContents(Marker marker) {
        if (clickedCluster != null) {
            for (MarkerItem item : clickedCluster.getItems()) {
                // Extract data from each item in the cluster as needed
            }
        }
        // build your custom view
        // ...
        return view;
    }
}