import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
public Feature toGeoJSON() {
    Point p = new Point();
    for (int i = 0; i < this.latLngs.size(); i++) {
        LatLng latLng = this.latLngs.get(i);
        p.setPosition(new Position(latLng.getLatitude(), latLng.getLongitude()));
    }

    Feature f = new Feature(p);
    f.setProperties(new JSONObject());
    return f;
}
 

import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
public Feature toGeoJSON() {
    LineString ls = new LineString();
    for (int i = 0; i < this.latLngs.size(); i++) {
        LatLng latLng = this.latLngs.get(i);
        ls.addPosition(new Position(latLng.getLatitude(), latLng.getLongitude()));
    }

    Feature f = new Feature(ls);
    f.setProperties(new JSONObject());
    return f;
}
 

import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
public ArrayList<LatLng> parseGeoJSON(GeoJSONObject geojson, ArrayList<LatLng> latLngs) {
  if (geojson instanceof FeatureCollection) {
    FeatureCollection fc = (FeatureCollection) geojson;
    for (Feature f : fc.getFeatures()) {
      latLngs.addAll(this.parseGeoJSON(f, new ArrayList<LatLng>()));
    }
  } else if (geojson instanceof Feature) {
    Feature feature = (Feature) geojson;
    latLngs.addAll(drawGeometry(feature.getGeometry(), new ArrayList<LatLng>()));
  } else {
    Log.d("Builder", "Not instanceof Feature.");
  }

  return latLngs;
}
 

import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
public Feature toGeoJSON() {
    Ring ring = new Ring();

    for (int i = 0; i < this.latLngs.size(); i++) {
        LatLng latLng = this.latLngs.get(i);
        ring.addPosition(new Position(latLng.getLatitude(), latLng.getLongitude()));
    }

    Polygon p = new Polygon(ring);
    Feature f = new Feature(p);
    f.setProperties(new JSONObject());
    return f;
}
 

import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
public static  JSONObject convertToJson(Collection<Event> events) throws JSONException, ParseException{

 	FeatureCollection featureCollection = new FeatureCollection();

 	for (final Event event : events) {
 	    Feature feature = new Feature();

 	    Point point = new Point(event.getLatitude(), event.getLongitude());

 	    feature.setGeometry(point);

 	    JSONObject jsonObject = new JSONObject();

 	    final Map<String, Object> metadataItems = event.getMetaData();
 	    if (metadataItems != null) {
 		for (final Entry<String, Object> entry : metadataItems
 			.entrySet()) {
 		    jsonObject.put(entry.getKey(), entry.getValue());
 		}
 	    }
 	    // Add event to properties.

 	    jsonObject.put("description",createJSONArray(event.getDescription()));
 	    jsonObject.put("address", event.getAddress());
 	    jsonObject.put("attachment", event.getAttachment());
 	    jsonObject.put("azimuth", event.getAzimuth());
 	    jsonObject.put("dateTime", toDateTimeString(event.getDateTime()));// comeback
 	    jsonObject.put("email", event.getEmail());
 	    jsonObject.put("inclination", event.getInclination());
 	    jsonObject.put("appKey", event.getIndexKey());
 	    jsonObject.put("info", event.getInfo());
 	    jsonObject.put("phone", event.getPhone());
 	    jsonObject.put("url", event.getUrl());
 	    jsonObject.put("uuid", event.getUuid());

 	    feature.setProperties(jsonObject);

 	    featureCollection.addFeature(feature);

 	}

 
 	return featureCollection.toJSON();

     }
 

import com.cocoahero.android.geojson.Feature; //导入依赖的package包/类
Feature toGeoJSON();