how can I make two google maps listeners? setOnCameraChangeListener

Question

How can I create two listeners? One is used for the clustering and the other will load new cluster items to the map if no cluster items exists on the map.

       //needed for clustering
       map.setOnCameraChangeListener(mClusterManager);

       // need for loading clusteritems
       map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
       @Override
       public void onCameraChange(CameraPosition position) {

       // ifMarkesNotInsideMapReload...

I think it's not possible but someone maybe solved this...

One idea is to set a starting position and poll for changes manually.. not cool :-)

I'm using googles cluster library: google cluster

Answer 1

I have looked into ClusterManager implementation of AMUtils library and it looks like it calls onCameraChange on your implementation of ClusterRenderer if it also implements OnCameraChangeListener. Simply make it implement that interface.

Relevant parts of the code:

@Override
public void onCameraChange(CameraPosition cameraPosition) {
    if (mRenderer instanceof GoogleMap.OnCameraChangeListener) {
        ((GoogleMap.OnCameraChangeListener) mRenderer).onCameraChange(cameraPosition);
    }

If you are using DefaultClusterRendeder, create a class like:

public class MyClusterRenderer extends DefaultClusterRenderer implements OnCameraChangeListener {