在Android中,可以使用Google Maps API来解决地图聚类问题。以下是一个示例解决方法,其中包含了标记没有被重新聚类的代码示例:
implementation 'com.google.android.gms:play-services-maps:17.0.1'
implementation 'com.google.maps.android:android-maps-utils:2.2.0'
public class ClusterMarker {
private LatLng position;
private String title;
public ClusterMarker(LatLng position, String title) {
this.position = position;
this.title = title;
}
public LatLng getPosition() {
return position;
}
public String getTitle() {
return title;
}
}
public class CustomClusterRenderer extends DefaultClusterRenderer {
private Context context;
public CustomClusterRenderer(Context context, GoogleMap map, ClusterManager clusterManager) {
super(context, map, clusterManager);
this.context = context;
}
@Override
protected void onBeforeClusterItemRendered(ClusterMarker item, MarkerOptions markerOptions) {
super.onBeforeClusterItemRendered(item, markerOptions);
// 设置标记的图标和其他属性
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
}
@Override
protected void onClusterItemRendered(ClusterMarker clusterItem, Marker marker) {
super.onClusterItemRendered(clusterItem, marker);
// 处理标记没有被重新聚类的情况
if (!getClusterManager().getRenderer().getMarkerToRender(clusterItem).equals(marker)) {
// 标记没有被重新聚类,可以在这里进行相应的操作
}
}
}
private GoogleMap googleMap;
private ClusterManager clusterManager;
private CustomClusterRenderer clusterRenderer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// 获取MapFragment
MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map_fragment);
mapFragment.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap map) {
googleMap = map;
setupMap();
}
});
}
private void setupMap() {
// 创建ClusterManager并设置它为地图的点击事件监听器
clusterManager = new ClusterManager<>(this, googleMap);
googleMap.setOnCameraIdleListener(clusterManager);
// 创建自定义的聚类渲染器并设置给ClusterManager
clusterRenderer = new CustomClusterRenderer(this, googleMap, clusterManager);
clusterManager.setRenderer(clusterRenderer);
// 添加一些标记到ClusterManager
clusterManager.addItem(new ClusterMarker(new LatLng(37.7749, -122.4194), "Marker 1"));
clusterManager.addItem(new ClusterMarker(new LatLng(37.7749, -122.4194), "Marker 2"));
// ...
// 聚焦最初的地图视野
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(37.7749, -122.4194), 10));
}
这样,你就可以在地图上显示聚类标记,并通过自定义的聚类渲染器类检查标记是否被重新聚类。在onClusterItemRendered方法中,可以根据需要处理标记没有被重新聚类的情况。