Android Google Map Utils聚类距离 [英] Android Google Map Utils Clustering Distance

问题描述

我使用Android Google Map utils启用我的标记群集。我使用10 标记

当我按下一个按钮时，我打电话：

  mGoogleMap.moveCamera（CameraUpdateFactory.newLatLngBounds（getMarkerBoundingBox（），MAP_PADDING））; 
  

我的八个标记靠近给定的区域，所以它们聚集在一起，我可以看到一个蓝色的球中心八号。
其他两个标记远离另一个组，但彼此非常接近。

我现在看到一个包含八个标记的群集，远离一个标记。只有当我放大单个标记（实际上是两个）的区域时，我才能看到两个标记。

我想显示八个标记的集群，但是这两个集群。

如何减少创建集群的距离？在极限情况下，如果标记太靠近，我希望在最后的缩放级别创建群集，但只有一个。

我试图将 MAX_DISTANCE_AT_ZOOM at NonHierarchicalDistanceBasedAlgorithm.java 但没有成功。任何想法??尝试重写shouldRenderAsCluster，所以集群从2个项目开始：

解决方案

在声明集群管理器时：

  mClusterManager.setRenderer（new CustomRenderer< YOUR_TYPE>（getActivity（） ，googleMap，mClusterManager））; 
 
 class CustomRenderer< T extends ClusterItem>扩展DefaultClusterRenderer< T> {
 public CustomRenderer（Context context，GoogleMap map，ClusterManager< T> clusterManager）{
 super（context，map，clusterManager）; 
 
 $ b @Override 
 protected boolean shouldRenderAsCluster（Cluster< T> cluster）{
 //如果至少2个项目重叠，则开始集群
返回集群.getSize（）> 1; 
} 
 ... 
} 
  

I'm using Android Google Map utils to enable clustering of my Markers. I'm using 10 Markers

When I press on a button, I call:

mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(getMarkerBoundingBox(), MAP_PADDING));

Eight of my markers are close to a given region so they are clustering and I can see a blue ball with the number eight on the center. The other two markers are far away from the other group but are really close to each other.

I'm now seeing a cluster with the eight markers and far away a single marker. Only if I zoom in in the area that single marker (that in fact are two) I can see both markers.

I want to show the cluster of the eight markers but a cluster of that two.

How can I decrease the distance that a cluster is created? At the limit, if markers are too close, I want clusters to be created at zoom level last but one.

I've tried to change MAX_DISTANCE_AT_ZOOM at NonHierarchicalDistanceBasedAlgorithm.java but with no success. Any ideas??

解决方案

Try to override shouldRenderAsCluster, so clustering starts from just 2 items:

When declaring the cluster manager:

    mClusterManager.setRenderer(new CustomRenderer<YOUR_TYPE>(getActivity(), googleMap, mClusterManager));

class CustomRenderer<T extends ClusterItem> extends DefaultClusterRenderer<T> {
    public CustomRenderer(Context context, GoogleMap map, ClusterManager<T> clusterManager) {
        super(context, map, clusterManager);
    }

    @Override
    protected boolean shouldRenderAsCluster(Cluster<T> cluster) {
        //start clustering if at least 2 items overlap
        return cluster.getSize() > 1;
    }
 ...
}

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