Arcgis对解析wms/wfs服务查询结果

概述:这里说的Arcgis对wms/wfs服务查询结果的解析主要是指Arcgis对geojso的解析。

接上篇:https://www.jianshu.com/p/ea5f5f98c9df
由于arcgis目前并不支持geojson数据，所以这里将geojson数据先转换为wkt字符串，然后在arcgis平台解析使用。
geojson数据样式:

geojson数据结构(MultiPolygon).png

上代码:
使用到的第三方库:

implementation 'com.cocoahero.android:geojson:1.0.1'
implementation 'com.google.code.gson:gson:2.8.0'

在代码中使用:

GeoJSONObject geoJSON = GeoJSON.parse(response);
JSONObject jsonObject = geoJSON.toJSON();
JSONArray features = jsonObject.getJSONArray("features");
if (features.length() > 0) {
      for (int i = 0; i < features.length(); i++) {
          JSONObject featJob = (JSONObject) features.get(i);
          JSONObject geometryJob = featJob.getJSONObject("geometry");
          if (geometryJob.getString("type").equals("MultiPolygon")) {
              // 将项目信息属性转为键值对并输出
              // Properties类为自定义的对象 -- 用于存储图形信息
              Properties p = JSON.parseObject(featJob.getString("properties"), Properties.class);
              StringBuffer msg = new StringBuffer();
              HashMap pMap = (HashMap) obj2Map(p);
              for (Map.Entry entry : pMap.entrySet()) {
                   msg.append(entry.getKey() + " --- " + entry.getValue()).append("\n");
              }
              // 多面
              String geoWktStr = GeoJsonToWkt.multiPolygonToWkt(geometryJob);
              /*********   ************   *********/
              // TODO 在地图上高亮显示
              com.esri.core.geometry.Geometry thisGeo = getPrjGeometry(geoWktStr);
              Graphic g = new Graphic(thisGeo, new SimpleFillSymbol(Color.BLUE));
              Callout callout = mMapView.getCallout();
              callout.show(mPoint, message(ArcgisActivity.this, msg.toString()));
              // 高亮显示
              int aCountId = graphicsLayer.addGraphic(g);
              mMapView.setExtent(g.getGeometry(), 300);
              /*********   **********   ***********/
      }
}

对象转Map键值对:https://www.jianshu.com/p/aeb96183f75b

public class GeoJsonToWkt {

    // 多面
    public static String multiPolygonToWkt(JSONObject geometryJob) {
        try {
            JSONArray multiGeo = geometryJob.getJSONArray("coordinates");
            MultiPolygon multiPolygon = new MultiPolygon();
            multiPolygon.setPolygons(multiGeo);

            LogUtil.i(multiPolygon.getType());
            List polygons = multiPolygon.getPolygons();

            StringBuffer geoWktStr = new StringBuffer();
            if (polygons.size() > 0) {
                geoWktStr.append("MULTIPOLYGON");
                geoWktStr.append("(");
                for (int q = 0; q < polygons.size(); q++) {
                    geoWktStr.append("(");
                    List rings = polygons.get(q).getRings();
                    for (int m = 0; m < rings.size(); m++) {
                        geoWktStr.append("(");
                        List positions = rings.get(m).getPositions();
                        LogUtil.i(rings.get(m).toString());
                        for (int n = 0; n < positions.size(); n++) {
                            if (n == 0) {
                                geoWktStr.append(positions.get(n).getLongitude() + " " + positions.get(n).getLatitude());
                            } else {
                                geoWktStr.append("," + positions.get(n).getLongitude() + " " + positions.get(n).getLatitude());
                            }
                        }
                        if (m != rings.size() - 1) {
                            geoWktStr.append("),");
                        } else {
                            geoWktStr.append(")");
                        }
                    }
                    if (q != polygons.size() - 1) {
                        geoWktStr.append("),");
                    } else {
                        geoWktStr.append(")");
                    }
                }
                geoWktStr.append(")");
            }
            LogUtil.i(geoWktStr.toString());
            return geoWktStr.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }

    // 多线
    public static String multiPolylineToWkt(JSONObject geometryJob) {
        try {
            JSONArray multiGeo = geometryJob.getJSONArray("coordinates");
            MultiLineString multiPolygon = new MultiLineString();
            multiPolygon.setLineStrings(multiGeo);

            LogUtil.i(multiPolygon.getType());
            List lineStrings = multiPolygon.getLineStrings();

            StringBuffer geoWktStr = new StringBuffer();
            if (lineStrings.size() > 1) {
                geoWktStr.append("MULTILINESTRING");
                geoWktStr.append("(");
            } else {
                geoWktStr.append("LINESTRING");
            }

            if (lineStrings.size() > 0) {
                for (int q = 0; q < lineStrings.size(); q++) {
                    geoWktStr.append("(");
                    List positions = lineStrings.get(q).getPositions();
                    LogUtil.i(lineStrings.get(q).toString());
                    for (int p = 0; p < positions.size(); p++) {
                        if (p == 0) {
                            geoWktStr.append(positions.get(p).getLongitude() + " " + positions.get(p).getLatitude());
                        } else {
                            geoWktStr.append("," + positions.get(p).getLongitude() + " " + positions.get(p).getLatitude());
                        }
                    }
                    if (q != lineStrings.size() - 1) {
                        geoWktStr.append("),");
                    } else {
                        geoWktStr.append(")");
                    }
                }
                if (lineStrings.size() > 1) {
                    geoWktStr.append(")");
                }
            }
            LogUtil.i(geoWktStr.toString());
            return geoWktStr.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }

    // 点
    public static String pointToWkt(JSONObject geometryJob) {
        try {
            JSONArray multiGeo = geometryJob.getJSONArray("coordinates");
            Point point = new Point();
            point.setPosition(multiGeo);

            LogUtil.i(point.getType());
            Position position = point.getPosition();
            StringBuffer geoWktStr = new StringBuffer();
            geoWktStr.append("POINT");
            geoWktStr.append("(");
            geoWktStr.append(position.getLongitude() + " " + position.getLatitude());
            geoWktStr.append(")");

            LogUtil.i(geoWktStr.toString());
            return geoWktStr.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }
}

由于数据原因，这里只对 多面、多线和点的数据进行了处理，且由于验证数据过少，或许存在bug。故仅做参考！！！

如何在arcgis 中使用wkt数据，请参考:https://www.jianshu.com/p/476896a89d14