我已经实现了Google Maps Clustering
的代码这是我活动中的代码
private void setUpClusterer() {
mClusterManager = new ClusterManager<StoreItem>(this, mMap);
mMap.setOnCameraChangeListener(mClusterManager);
mMap.setOnMarkerClickListener(mClusterManager);
}
public void addItems(List<Store> stores) {
for (Store store : stores) {
mClusterManager.addItem(new StoreItem(store.getImage(), store.getLocation().getLatitude(), store.getLocation().getLongitude()));
}
}
private void removeAllItems() {
mClusterManager.clearItems();
}
这是StoreItem类
public class StoreItem implements ClusterItem {
private String url;
private final LatLng mPosition;
public StoreItem(String url, double lat, double lng) {
this.url = url;
mPosition = new LatLng(lat, lng);
}
@Override
public LatLng getPosition() {
return mPosition;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
现在,我想通过StoreItem类中的url参数更改标记图标。
我该怎么做?
答案 0 :(得分:5)
考虑覆盖onBeforeClusterRendered。类似的东西会起作用:
BitmapDescriptor descriptor = BitmapDescriptorFactory.fromBitmap(here_goes_your_bitmap);
markerOptions.icon(descriptor);
请记住,代码仅用于示例。您必须手动将文本添加到位图并添加一些实际使用的缓存机制。您可以查看样本的DefaultClusterRenderer源代码。
答案 1 :(得分:3)
你需要@override方法onBeforeClusterItemRendered()DefaultClusterRenderer类 将onBeforeClusterItemRendered中的iconurl设置为markerOptions,请在下面找到代码:
private class CustomMapClusterRenderer<T extends ClusterItem> extends DefaultClusterRenderer<T> {
CustomMapClusterRenderer(Context context, GoogleMap map, ClusterManager<T> clusterManager) {
super(context, map, clusterManager);
}
@Override
protected boolean shouldRenderAsCluster(Cluster<T> cluster) {
//start clustering if 2 or more items overlap
return cluster.getSize() >= Constants.MINIMUM_CLUSTER_SIZE;
}
@Override
protected void onBeforeClusterItemRendered(T item,
MarkerOptions markerOptions) {
ClusterMarkerItem markerItem = (ClusterMarkerItem) item;
markerOptions.icon(BitmapDescriptorFactory.fromPath(markerItem.getURL()));
}
}