百度地图聚合

一、牛人们的想法

下面是我参考的有关的博客，下面将一一列举

1.MarkerCluster之百度地图版 http://hi.baidu.com/liongg/item/d8adece188fbfb11585dd89f

2.Marker Cluster面面观http://hi.baidu.com/liongg/item/a380cc95bd70c2bdcd80e581

3.GoogleMap标注物聚合解决办法http://www.svennerberg.com/2009/01/handling-large-amounts-of-markers-in-google-maps/

4.百度地图官网上已经有JS版的标注物聚合实例与原文件，建议看百度地图上的代码，规范且函数注释明确。

百度地图javascript开源库：http://developer.baidu.com/map/library.htm

二、我的思路

1.下面以一个流程图来表述我的想法。

2.下面贴出代码

[html]view plaincopy 
    
 <spanstyle="font-family:KaiTi_GB2312;">spanstyle="font-size:18px;">//cluster聚合器类
 packagecom.zhl.map;
 
 importjava.util.ArrayList;
 importjava.util.List;
 
 importandroid.graphics.Bitmap;
 importandroid.graphics.Point;
 importandroid.graphics.drawable.BitmapDrawable;
 importandroid.util.Log;
 importandroid.view.LayoutInflater;
 importandroid.view.View;
 importandroid.widget.TextView;
 importbaidumapsdk.demo.R;
 importcom.baidu.mapapi.cloud.Bounds;
 importcom.baidu.mapapi.map.MapView;
 importcom.baidu.mapapi.map.OverlayItem;
 importcom.baidu.mapapi.utils.DistanceUtil;
 importcom.baidu.platform.comapi.basestruct.GeoPoint;
 importcom.zhl.activity.MarkerClusterActivity;
 importcom.zhl.util.MapUtils;
 publicclassCluster{
 privateMarkerClusterActivitymMarkCluster;
 privateMapViewmMapView;
 privateintmMinClusterSize;
 privateBooleanisAverageCenter;
 privateintmGridSize;
 privatedoublemDistance;
 privateListClusterMarker>mMarkers;
 publicCluster(MarkerClusterActivitymarkCluster,MapViewmapView
 ,intminClusterSize,BooleanisAverageCenter
 ,intmGridSize,doublemDistance){
 this.mMarkCluster=markCluster;
 this.mMapView=mapView;
 this.mMinClusterSize=minClusterSize;
 this.isAverageCenter=isAverageCenter;
 this.mGridSize=mGridSize;
 this.mDistance=mDistance;
 mMarkers=newArrayList>();
 }
 publicListOverlayItem>createCluster(List>markerList){
 this.mMarkers.clear();
 List>itemList=newArrayList>();
 for(inti=0;imarkerList.size();i++){
 addCluster(markerList.get(i));
 }
 for(inti=0;imMarkers.size();i++){
 ClusterMarkercm=mMarkers.get(i);
 setClusterDrawable(cm);
 OverlayItemoi=newOverlayItem(cm.getmCenter(),cm.getTitle(),cm.getSnippet());
 oi.setMarker(cm.getMarker());
 itemList.add(oi);
 returnitemList;
 privatevoidaddCluster(OverlayItemmarker){
 GeoPointmarkGeo=marker.getPoint();
 if(mMarkers.size()==0){
 ClusterMarkerclusterMarker=newClusterMarker(marker.getPoint(),marker.getTitle(),marker.getSnippet());
 clusterMarker.setMarker(marker.getMarker());
 clusterMarker.AddMarker(marker,isAverageCenter);
 Boundsbound=newBounds(markGeo.getLatitudeE6(),markGeo.getLongitudeE6(),markGeo.getLatitudeE6(),markGeo.getLongitudeE6());
 bound=MapUtils.getExtendedBounds(mMapView,bound,mGridSize);
 clusterMarker.setmGridBounds(bound);
 mMarkers.add(clusterMarker);
 }else{
 ClusterMarkerclusterContain=null;
 doubledistance=mDistance;
mMarkers.size();i++){
 ClusterMarkerclusterMarker=mMarkers.get(i);
 GeoPointcenter=clusterMarker.getmCenter();
 doubled=DistanceUtil.getDistance(center,marker.getPoint());
 if(ddistance){
 distance=d;
 clusterContain=clusterMarker;
 if(clusterContain==null||!isMarkersInCluster(markGeo,clusterContain.getmGridBounds())){
 clusterMarker.AddMarker(marker,isAverageCenter);
 Boundsbound=newBounds(markGeo.getLatitudeE6(),markGeo.getLongitudeE6());bound=MapUtils.getExtendedBounds(mMapView,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> mMarkers.add(clusterMarker);
 }else{
 clusterContain.AddMarker(marker,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> privatevoidsetClusterDrawable(ClusterMarkerclusterMarker){
 ViewdrawableView=LayoutInflater.from(mMarkCluster).inflate(
 R.layout.drawable_mark,null);
 TextViewtext=(TextView)drawableView.findViewById(R.id.drawble_mark);
 intmarkNum=clusterMarker.getmMarkers().size();
 if(markNum>=2){
 text.setText(markNum+"");
11){
 text.setBackgroundResource(R.drawable.m0);
 }elseif(markNum>10&&markNum21){
 text.setBackgroundResource(R.drawable.m1);
>20&&markNum31){
 text.setBackgroundResource(R.drawable.m2);
>30&&markNum41){
 text.setBackgroundResource(R.drawable.m3);
 text.setBackgroundResource(R.drawable.m4);
 Bitmapbitmap=MapUtils.convertViewToBitmap(drawableView);
 clusterMarker.setMarker(newBitmapDrawable(bitmap));
 privateBooleanisMarkersInCluster(GeoPointmarkerGeo,Boundsbound){
 if(markerGeo.getLatitudeE6()>bound.leftBottom.getLatitudeE6()
 &&markerGeo.getLatitudeE6()bound.rightTop.getLatitudeE6()
 &&markerGeo.getLongitudeE6()>bound.rightTop.getLongitudeE6()
 &&markerGeo.getLongitudeE6()bound.leftBottom.getLongitudeE6()){
 returntrue;
 returnfalse;
 }</span>

3.工程demo代码下载，地图标注物聚合.zip

4.下面是程序的实例图片

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