Android Arcgis入门(三)、GraphicsLayer添加点、线、面

GraphicsLayer是图形图层，可以自定义图形添加到地图上。调用GraphicsLayer的addGraphic方法就能添加图形，此方法要一个Graphic对象，此对象的构造方法是Graphic(Geometry geometry, Symbol symbol)，前面第一个是要素，而Geometry的子类有Envelope, MultiPath, MultiPoint, Point, Segment，Line, Polygon, Polyline。我们所常用的有点Point，线Polyline，面Polygon。而后面一

个参数是样式，点的样式是SimpleMarkerSymbol，线的样式是SimpleLineSymbol，面的样式是SimpleFillSymbol。

一、GraphicsLayer添加点：

  Graphic graphic = new Graphic(point, new SimpleMarkerSymbol(Color.RED,5, SimpleMarkerSymbol.STYLE.CIRCLE));  graphicsLayer.addGraphic(graphic);

二、添加线，样式有实线、虚线、点虚线、点点虚线、点线等。效果图如下：

Polyline polyline = new Polyline();        polyline.startPath(new Point(113,23));//第一个点用startPath,后面的点用lineTo方法         polyline.lineTo(new Point(123,23));         graphic = new Graphic(polyline,new SimpleLineSymbol(Color.RED,3, SimpleLineSymbol.STYLE.SOLID));         graphicsLayer.addGraphic(graphic);

    

三、添加面Polygon，效果图如下：

 Polygon polygon = new Polygon();                 //第一个点startPath,后面的点用lineTo                  polygon.startPath(new Point(118,23));                  polygon.lineTo(new Point(118,15));                     polygon.lineTo(new Point(113,13));                                     graphic = new Graphic(polygon,new SimpleFillSymbol(Color.GREEN,SimpleFillSymbol.STYLE.SOLID));                graphicsLayer.addGraphic(graphic);

 
   

原码如下，

package com.arcgis.test;import android.graphics.Color;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.Spinner;import com.esri.android.map.GraphicsLayer;import com.esri.android.map.MapView;import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;import com.esri.android.map.event.OnSingleTapListener;import com.esri.core.geometry.Point;import com.esri.core.geometry.Polygon;import com.esri.core.geometry.Polyline;import com.esri.core.map.Graphic;import com.esri.core.symbol.SimpleFillSymbol;import com.esri.core.symbol.SimpleLineSymbol;import com.esri.core.symbol.SimpleMarkerSymbol;import java.util.ArrayList;import java.util.List;public class GraphicActivity extends AppCompatActivity {    private MapView mMapView;    private Spinner graphicTypeSpinner;    private Button clernBtn;    private ArcGISTiledMapServiceLayer arcGISTiledMapServiceLayer;    private GraphicsLayer graphicsLayer;    private String mapServerUrl = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer";    //点集合    private List<Point> pointList = new ArrayList<>();    private Graphic graphic;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_graphic);        initView();        addLayer();    }    private void initView() {        mMapView = (MapView) findViewById(R.id.map_view);        //mapview点击事件        mMapView.setOnSingleTapListener(new OnSingleTapListener() {            @Override            public void onSingleTap(float x, float y) {                handleSingleTap(x, y);            }        });        graphicTypeSpinner = (Spinner) findViewById(R.id.spinner_type);        graphicTypeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                pointList.removeAll(pointList);                graphicsLayer.removeAll();            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });        clernBtn = (Button) findViewById(R.id.clear_graphic);        clernBtn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                pointList.removeAll(pointList);                graphicsLayer.removeAll();            }        });    }    private void addLayer() {        arcGISTiledMapServiceLayer = new ArcGISTiledMapServiceLayer(mapServerUrl);        mMapView.addLayer(arcGISTiledMapServiceLayer);        graphicsLayer = new GraphicsLayer();        mMapView.addLayer(graphicsLayer);    }    private void handleSingleTap(float x, float y) {        Point point = mMapView.toMapPoint(x, y);        graphicsLayer.removeAll();        pointList.add(point);        String type = graphicTypeSpinner.getSelectedItem().toString().trim();        switch (type) {            case "点":                graphic = new Graphic(point, new SimpleMarkerSymbol(Color.RED,5, SimpleMarkerSymbol.STYLE.CIRCLE));                graphicsLayer.addGraphic(graphic);                break;            case "线":                Polyline polyline = new Polyline();                if (pointList.size()>1){                    for(int i=0;i<pointList.size();i++){                        if (i==0){                            polyline.startPath(pointList.get(i));                        }else{                            polyline.lineTo(pointList.get(i));                        }                    }                }                graphic = new Graphic(polyline,new SimpleLineSymbol(Color.RED,3, SimpleLineSymbol.STYLE.SOLID));                graphicsLayer.addGraphic(graphic);                break;            case "面":                Polygon polygon = new Polygon();                    for(int i=0;i<pointList.size();i++){                        if (i==0){                            polygon.startPath(pointList.get(i));                        }else{                            polygon.lineTo(pointList.get(i));                        }                    }                graphic = new Graphic(polygon,new SimpleFillSymbol(Color.GREEN,SimpleFillSymbol.STYLE.SOLID));                graphicsLayer.addGraphic(graphic);                break;        }    }}