onClusterClick method gets passed with a null Cluster (collection)

[ericpanorel]

I am encountering instances where the onClusterClick method, gets passed with a null parameter. Similar to the demo app, the cluster parameter below is null, causing the application to crash, when a user clicks the "cluster marker". Another symptom when this issue is happening, is that there are way more "cluster markers" as there should be, i.e. when totally zoomed out (picture below), they are still there, instead of just one marker. I find that this happens, when I am "slowly" zooming in and out a few times. I am pointing to version 0.2.1 (gradle).

My work around right now, is to add a try-catch, at least the App doesn't crash. Any ideas?

@Override
public boolean onClusterClick(Cluster<Person> cluster) {
    // Show a toast with some info when the cluster is clicked.
    String firstName = cluster.getItems().iterator().next().name;
    Toast.makeText(this, cluster.getSize() + " (including " + firstName + ")", Toast.LENGTH_SHORT).show();
    return true;
}

[broady]

Can reproduce this in the demo app? Do you have other markers on the map?

[ericpanorel]

I haven't tried the demo app, but the code is mostly based from the demo. What do you mean by "other markers"? All markers are solely added via (enhanced for-loop )

 mClusterManager.addItem(m);

if that's what you're asking? There are no "stand-alone" marker additions..

As I have a "refresh" button, it also fixes the "extra clutter" problem, coz it blasts away all markers, and adds them again.

Thanks mate....

[broady]

I can't reproduce this with the demo app on 0.2.1. Can you send me a build (or source code?) of your project?

[ericpanorel]

Sent... Let me know if you didn't get my email.

[ericpanorel]

After further debugging, I'm afraid this issue might be caused by activity/fragment life cycle management. I update my markers upon receiving them from a LocalBroadcastReceiver. The problem becomes easily reproducible, when I rotate the screen too many times while attempting to zoom out/in in between the rotation - in the zoom range that a lot of markers are visible. In my app, the rotation of the screen, initiates a call to a service, then registers a local broadcast receiver... The onReceive method, updates the map... I caught at one point, the even the getActivity() returns null when the onReceive gets called....

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Please comment here if it is still valid so that we can reprioritize. Thank you!

[stale]

Closing this. Please reopen if you believe it should be addressed. Thank you for your contribution.