    static int OFFSET = 268435456;
        static double RADIUS = 85445659.4471;
        static double pi = 3.1444;

    public static double lonToX(double lon) {
        return Math.round(OFFSET + RADIUS * lon * pi / 180);
    }

    public static double latToY(double lat) {
        return Math.round(OFFSET
                - RADIUS
                * Math.log((1 + Math.sin(lat * pi / 180))
                        / (1 - Math.sin(lat * pi / 180))) / 2);
    }

    public static int pixelDistance(double lat1, double lon1, double lat2,
            double lon2, int zoom) {
        double x1 = lonToX(lon1);
        double y1 = latToY(lat1);

        double x2 = lonToX(lon2);
        double y2 = latToY(lat2);

        return (int) (Math
                .sqrt(Math.pow((x1 - x2), 2) + Math.pow((y1 - y2), 2))) >> (21 - zoom);
    }

    static ArrayList<Cluster> cluster(ArrayList<Marker> markers, int zoom) {

        ArrayList<Cluster> clusterList = new ArrayList<Cluster>();

        ArrayList<Marker> originalListCopy = new ArrayList<Marker>();

        for (Marker marker : markers) {
            originalListCopy.add(marker);
        }

        /* Loop until all markers have been compared. */
        for (int i = 0; i < originalListCopy.size();) {

            /* Compare against all markers which are left. */

            ArrayList<Marker> markerList = new ArrayList<Marker>();
            for (int j = i + 1; j < markers.size();) {
                int pixelDistance = pixelDistance(markers.get(i).getLatitude(),
                        markers.get(i).getLongitude(), markers.get(j)
                                .getLatitude(), markers.get(j).getLongitude(),
                        zoom);

                if (pixelDistance < 40) {


                    markerList.add(markers.get(j));

                    markers.remove(j);

                    originalListCopy.remove(j);
                    j = i + 1;
                } else {
                    j++;
                }

            }

            if (markerList.size() > 0) {
 markerList.add(markers.get(i));                
Cluster cluster = new Cluster(clusterList.size(), markerList,
                        markerList.size() + 1, originalListCopy.get(i)
                                .getLatitude(), originalListCopy.get(i)
                                .getLongitude());
                clusterList.add(cluster);
                originalListCopy.remove(i);
                markers.remove(i);
                i = 0;

            } else {
                i++;
            }

            /* If a marker has been added to cluster, add also the one */
            /* we were comparing to and remove the original from array. */

        }
        return clusterList;
    }

Just pass in your array list here containing latitude and longitude then to display clusters. Here goes the function.


    @Override
    public void onTaskCompleted(ArrayList<FlatDetails> flatDetailsList) {

        LatLngBounds.Builder builder = new LatLngBounds.Builder();

        originalListCopy = new ArrayList<FlatDetails>();
        ArrayList<Marker> markersList = new ArrayList<Marker>();
        for (FlatDetails detailList : flatDetailsList) {

            markersList.add(new Marker(detailList.getLatitude(), detailList
                    .getLongitude(), detailList.getApartmentTypeString()));

            originalListCopy.add(detailList);

            builder.include(new LatLng(detailList.getLatitude(), detailList
                    .getLongitude()));

        }

        LatLngBounds bounds = builder.build();
        int padding = 0; // offset from edges of the map in pixels
        CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);

        googleMap.moveCamera(cu);

        ArrayList<Cluster> clusterList = Utils.cluster(markersList,
                (int) googleMap.getCameraPosition().zoom);

        // Removes all markers, overlays, and polylines from the map.
        googleMap.clear();

        // Zoom in, animating the camera.
        googleMap.animateCamera(CameraUpdateFactory.zoomTo(previousZoomLevel),
                2000, null);

        CircleOptions circleOptions = new CircleOptions().center(point) //
                // setcenter
                .radius(3000) // set radius in meters
                .fillColor(Color.TRANSPARENT) // default
                .strokeColor(Color.BLUE).strokeWidth(5);

        googleMap.addCircle(circleOptions);

        for (Marker detail : markersList) {

            if (detail.getBhkTypeString().equalsIgnoreCase("1 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk1)));
            } else if (detail.getBhkTypeString().equalsIgnoreCase("2 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk_2)));

            }

            else if (detail.getBhkTypeString().equalsIgnoreCase("3 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk_3)));

            } else if (detail.getBhkTypeString().equalsIgnoreCase("2.5 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk2)));

            } else if (detail.getBhkTypeString().equalsIgnoreCase("4 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk_4)));

            } else if (detail.getBhkTypeString().equalsIgnoreCase("5 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk5)));

            } else if (detail.getBhkTypeString().equalsIgnoreCase("5+ BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk_5)));

            }

            else if (detail.getBhkTypeString().equalsIgnoreCase("2 BHK")) {
                googleMap.addMarker(new MarkerOptions()
                        .position(
                                new LatLng(detail.getLatitude(), detail
                                        .getLongitude()))
                        .snippet(String.valueOf(""))
                        .title("Flat" + flatDetailsList.indexOf(detail))
                        .icon(BitmapDescriptorFactory
                                .fromResource(R.drawable.bhk_2)));

            }
        }

        for (Cluster cluster : clusterList) {

            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inMutable = true;
            options.inPurgeable = true;
            Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
                    R.drawable.cluster_marker, options);

            Canvas canvas = new Canvas(bitmap);

            Paint paint = new Paint();
            paint.setColor(getResources().getColor(R.color.white));
            paint.setTextSize(30);

            canvas.drawText(String.valueOf(cluster.getMarkerList().size()), 10,
                    40, paint);

            googleMap.addMarker(new MarkerOptions()
                    .position(
                            new LatLng(cluster.getClusterLatitude(), cluster
                                    .getClusterLongitude()))
                    .snippet(String.valueOf(cluster.getMarkerList().size()))
                    .title("Cluster")
                    .icon(BitmapDescriptorFactory.fromBitmap(bitmap)));

        }

    }

Answer 5

您需要按照以下步骤操作：

我们需要实施/ instal Google Maps Android API utility library

Android studio / Gradle：

dependencies {
    compile 'com.google.maps.android:android-maps-utils:0.3+'
}

其次，您需要阅读Google的官方文档 - ＆gt; Google Maps Android Marker Clustering Utility

添加简单的标记聚类器

按照以下步骤创建一个包含十个标记的简单群集。该结果将看起来像这样，虽然标记的数量显示/群集将根据缩放级别而改变：

Add a simple marker clusterer

以下是所需步骤的摘要：

实施ClusterItem以在地图上表示标记。群集项将标记的位置作为LatLng对象返回。
添加新的ClusterManager以根据缩放级别对群集项目（标记）进行分组。
将地图的OnCameraChangeListener()设置为ClusterManager，因为ClusterManager实现了监听器。
如果您想要添加特定功能以响应标记点击事件，请将地图OnMarkerClickListener()设置为ClusterManager，因为ClusterManager会实现侦听器。
将标记输入ClusterManager。

更详细地查看步骤：要创建包含十个标记的简单集群，首先要创建一个实现MyItem的{{1}}类。

ClusterItem

在地图活动中，添加public class MyItem implements ClusterItem { private final LatLng mPosition; public MyItem(double lat, double lng) { mPosition = new LatLng(lat, lng); } @Override public LatLng getPosition() { return mPosition; } }并将其提供给群集项。请注意类型参数ClusterManager，它声明ClusterManager的类型为<MyItem>。

MyItem

<强>演示

https://www.youtube.com/watch?v=5ZnVraO1mT4

<强> Github上

如果您需要更多信息/已完成的项目，请访问：https://github.com/dimitardanailov/googlemapsclustermarkers

如果您有更多问题，请与我联系。

Answer 6

谁遇到麻烦 Clusterkraf （我无法让它工作！）以及谁不能使用 android-maps-extension 导致它随附一个自定义构建的Play服务库，我想建议这个其他库，它很小，编写得很好并且开箱即用：

Clusterer ：https://github.com/mrmans0n/clusterer

经过整整一个上午尝试使用其他两个库后，这一个节省了我的一天！

Answer 7

如果您只获得最新的标记，则需要对所有标记进行聚类

> private ClusterManager<MyItem> mClusterManager;

添加商品后

mClusterManager.addItem("your item");
mClusterManager.cluster();

Answer 8

对于那些在使用Google Maps Android API实用程序库时遇到问题的人，我们已经创建了自己的快速群集库：https://github.com/sharewire/google-maps-clustering。它可以在地图上轻松处理20000个标记。

Google Maps Android v2中的群集标记

8 个答案: