Hi, first of all, thank you for you contribution. I tried the original library by Google and, yes, it's slow. So I found yours! But I'm having some trouble making things work. I have a custom marker, made like this:

@Override
public void onMapReady(GoogleMap map) {
      final IconGenerator iconFactory = new IconGenerator(this);
           iconFactory.setStyle(IconGenerator.STYLE_BLUE);
    
    addIcon(iconFactory, "9872", locationExample); 
}
private void addIcon(IconGenerator iconFactory, CharSequence text, LatLng position) {
        MarkerOptions markerOptions = new MarkerOptions().
                icon(BitmapDescriptorFactory.fromBitmap(iconFactory.makeIcon(text))).
                position(position).
                anchor(iconFactory.getAnchorU(), iconFactory.getAnchorV());

        map.addMarker(markerOptions);

And now I'm trying to add your cluster library to it, but I dont know if I can use my already customized markers. If not, does your library have a custom marker icon option? I've tried to do it, but I can't get it work. Could you please give me an example of a custom marker? I just need a marker with a number inside.

This was my best try:

final ClusterManager<SampleClusterItem> clusterManager = new ClusterManager<>(this, map);
        clusterManager.setCallbacks(new ClusterManager.Callbacks<SampleClusterItem>() {
            @Override
            public boolean onClusterClick(@NonNull Cluster<SampleClusterItem> cluster) {
                Log.d(TAG, "onClusterClick");
                return false;
            }

            @Override
            public boolean onClusterItemClick(@NonNull SampleClusterItem clusterItem) {
                Log.d(TAG, "onClusterItemClick");
                return false;
            }
        });
        map.setOnCameraIdleListener(clusterManager);

        IconStyle.Builder stilo = new IconStyle.Builder(this);
        stilo.setClusterBackgroundColor(Color.BLUE);
        stilo.setClusterTextColor(Color.WHITE);

        DefaultIconGenerator icono = new DefaultIconGenerator(this);
        icono.setIconStyle(stilo.build());

Thank you so much :)

Hey, thank you for writing this library - google maps utils really lacks maintainers...

I wonder if it's possible to change the range of the clusters. I've just seen the screenshots and the clusters seem very far apart.

Thanks in advance.

@makovkastar I need to modify some of the library classes such as QuadTree so I can pass additional variables to ClusterItem, but it says that the library is read only since I imported it with gradle.

So I followed guides trying to import it as a module, but always got build errors such as Error:(11, 0) Could not find method compile() for arguments [project ':subProject:library'] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler. <a href="openFile:C:\Users\Nathan\Android Projects\ImportModule4\build.gradle">Open File</a>

and

Error:(18, 0) Could not find method android() for arguments [build_enfbvdz6abztfoiqie2qzfmjg$_run_closure1@58eced6f] on root project 'ModuleImport2' of type org.gradle.api.Project. <a href="openFile:C:\Users\Nathan\Android Projects\ModuleImport2\build.gradle">Open File</a>

I followed these guides: https://stackoverflow.com/questions/41764338/importing-module-in-android-studio and https://github.com/MagicMicky/FreemiumLibrary/wiki/Import-the-library-in-Android-Studio

Do you have a recommended method to adding your library to an existing project and be able to modify files?

Hi Alex Melnykov, Firstly I really thank you for your library. I solved my problems about rendering more than 100k markers. But now I'm facing out of memory error about bitmap when I leave and came back to map fragment. I think bitmap resources may not be cleared when fragment was destroyed at first time. Because the first time the map and its clustering is working fine. Do you have any suggestion to solve this problem? I'm new for map implementing, feel free to advise me. Thanks, Gaw

Great library, right now I was looking for a solution whith clustering...

I see in the demo/gir that the cluster is hidden and shown only when necessary

Is posible add animate fade-in when cluster is needed draw in viewport? Similar objects in google maps, labels, icons...

Or other feature, posible set factor viewport "visible" increase the viewport as if it were 1.2f, so the clusters are pre-loaded before being visualized

In my sideproject I wanted to exchange the renderer to change how tag's are set and the animation. So I thought sharing this is a good idea.

Another way of archiving this would be by defaulting to the ClusterRenderer and having a setter that makes it possible to exchange it later on.

You are more then welcome to give some thoughts on that.

Do I understand your code correctly the synchronization of mQuadTree is based on the fact that mExecutor is single-threaded?

Opening issues is the only option I can think of to ask questions so I hope u don't bother.

Can't find a way to get hold of the ClusterItem to then be able to programatically show infoWindow. Is there a way to do this that I've missed? If not I'll work on a pull request as I think it would be really useful.

Thanks

Hi !

I'm from Argentina and saw that with negatives values for latitude and longitude the method getClusters return 0.

I fixed it replacing in ClusterManager.java Line: 176 the next sentence:

         `   List<T> points = mQuadTree.queryRange(north > south ? north : south, west < east ? west : east, south < north ? south : north, east > west ? east : west);`

I not have much time now to test whether is the ideal and global solution for the whole map, but it can be a good starting point.

Regards!

Hi! We've found out that you ClusterManager removes all the markers from the map when camera bounds include 180'th meridian, coz this situation is not properly handled. You can reproduce it by adding points around 180/-180 to your MapActivity::onMapReady

        clusterItems.add(new SampleClusterItem(new LatLng(1, 179)));
        clusterItems.add(new SampleClusterItem(new LatLng(2, -179)));

I've added naive WO.

Hello, I have an issue where i have 3 types of markers store in 3 list and i display them one at a time by calling clusterManager.setItems(list) It works very well but some of the markers once they have been drawn on the map (i.e not in a cluster anymore) are not removed when i change the cluster array. Here is a video showing some markers (blue) being removed when in a cluster but not anymore when they have been drawn on the map.

Video showing the bug

And here the code how i switch between the lists :

clusterManager.setItems(new ArrayList<>());
clusterManager.onCameraIdle();
clusterManager.setItems(newList);

If i remove the call to onCameraIdle more markers stay on the map. I have more than 10 000 markers.

Since your library hasn't been updated since 2 years i have search for alternative but haven't found any as good as yours for clustering thousands of markers.

JCenter is shutting down: https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/

Since JCenter is shutting down, please consider publishing your SDK to Maven Central

Thanks.

Hello. In my app when I click a cluster it opens dialog fragment with list of items. Then when I click item it opens another fragment. And when I pop back to map fragment my map very lagging. Then if I open dialog again and dismiss it map works as usual. Found same problem here but there is no any solutions that help me. It seems that the problem with gms maps, so I tried to modify your library in my app using 'com.google.android.libraries.maps:maps:3.1.0-beta' instead gms and it solved problem with dialog but there is another problem that some markers don't remove when clustering. Can you help me migrate your library using android libraries maps instead gms?

Good morning. Thank you for creating a useful library first. I'm currently using custom cluster markers. When the map is zoomed in or out, the cluster markers change to existing markers. How can I deal with it so that it doesn't change?

Because it is a Google translation, it may not be translated correctly @makovkastar

By using the ObjectAnimator when animating map markers, the variable name position gets obfuscated for release, crashing the app.

    private void animateMarkerToLocation(@NonNull final Marker marker, @NonNull LatLng targetLocation,
                                         final boolean removeAfter) {
        ObjectAnimator objectAnimator = ObjectAnimator.ofObject(marker, "position",
                new LatLngTypeEvaluator(), targetLocation);
        objectAnimator.setInterpolator(new FastOutSlowInInterpolator());

I don't know if just adding to the README is enough, or maybe preventing this by embedding proguard rules in the project.

-keep class com.google.android.gms.maps.model.Marker { *; }