Android中ArcGIS中实现DrawTool类

package com.esri.drawtool;import java.util.HashMap;import java.util.Map;import android.content.Context;import android.graphics.Color;import android.view.MotionEvent;import com.esri.android.map.GraphicsLayer;import com.esri.android.map.MapOnTouchListener;import com.esri.android.map.MapView;import com.esri.core.geometry.MultiPath;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 com.esri.core.symbol.SimpleMarkerSymbol.STYLE;public class DrawTool {//map属性private MapView map;//标绘图层private GraphicsLayer graphicsLayer;private MyTouchListener myTouch;//符号样式private SimpleMarkerSymbol sms;private SimpleLineSymbol sls;private SimpleFillSymbol sfs;public SimpleMarkerSymbol getSms() {return sms;}public void setSms(SimpleMarkerSymbol sms) {this.sms = sms;}public SimpleLineSymbol getSls() {return sls;}public void setSls(SimpleLineSymbol sls) {this.sls = sls;}public SimpleFillSymbol getSfs() {return sfs;}public void setSfs(SimpleFillSymbol sfs) {this.sfs = sfs;}//构造函数public DrawTool(Context context,MapView map,GraphicsLayer glayer) {this.map = map;this.graphicsLayer = glayer;//实例化监听器myTouch = new MyTouchListener(context, map,glayer);//设置绘画监听this.map.setOnTouchListener(myTouch);}//标绘点操作public void drawPoint(){this.myTouch.setType("POINT");}//标绘线操作public void drawLine(){this.myTouch.setType("POLYLINE");}//标绘面操作public void drawPolgyon(){this.myTouch.setType("POLYGON");}//取消标绘public void cancelDraw(){this.myTouch.setType("");}//清除图层信息public void removeAll(){graphicsLayer.removeAll();} /**  * 触摸监听类 * @author Administrator *   */class MyTouchListener extends MapOnTouchListener {MultiPath poly;String type = "";Point startPoint = null;int uid = 0;GraphicsLayer graphicsLayer;MapView mapView;public MyTouchListener(Context context, MapView view, GraphicsLayer glayer) {super(context, view);this.graphicsLayer = glayer;this.mapView = view;}public void setType(String geometryType) {this.type = geometryType;}public String getType() {return this.type;}/** * 点击地图时的操作 */public boolean onSingleTap(MotionEvent e) {if (type.length() > 1 && type.equalsIgnoreCase("POINT")) {if(sms == null)sms = new SimpleMarkerSymbol(Color.RED,25,STYLE.CIRCLE);Graphic graphic = new Graphic(mapView.toMapPoint(new Point(e.getX(), e.getY())),sms);//graphic.setGeometry();graphicsLayer.addGraphic(graphic);return true;}return false;}/** * 点击地图并在屏幕上滑动的操作 * */public boolean onDragPointerMove(MotionEvent from, MotionEvent to) {if (type.length() > 1&& (type.equalsIgnoreCase("POLYLINE") || type.equalsIgnoreCase("POLYGON"))) {Point mapPt = mapView.toMapPoint(to.getX(), to.getY());/* *如果startPoint为空，者创建它并将设置为poly的起始点 */if (startPoint == null) {poly = type.equalsIgnoreCase("POLYLINE") ? new Polyline(): new Polygon();startPoint = mapView.toMapPoint(from.getX(), from.getY());poly.startPath((float) startPoint.getX(),(float) startPoint.getY());/* * 创建也该Graphic对象，并将他添加到图层中去 */Graphic graphic;if(type.equalsIgnoreCase("POLYLINE")){//设置线型样式，如果为空者创建他Map  attutes = new HashMap<String, Object>();attutes.put("name", "tanghy");attutes.put("age", 11);if(sls == null)sls = new SimpleLineSymbol(Color.RED,2); graphic = new Graphic(poly,sls,attutes,null);}else{if(sfs == null){//设置面状样式，如果为空者创建他sfs = new SimpleFillSymbol(Color.RED);sfs.setOutline(new SimpleLineSymbol(Color.BLUE,2));sfs.setAlpha(50);} graphic = new Graphic(poly,sfs);}//建图形添加到图层中uid = graphicsLayer.addGraphic(graphic);}poly.lineTo((float) mapPt.getX(), (float) mapPt.getY());//更新图形graphicsLayer.updateGraphic(uid, poly);return true;}return super.onDragPointerMove(from, to);}@Overridepublic boolean onDragPointerUp(MotionEvent from, MotionEvent to) {if (type.length() > 1&& (type.equalsIgnoreCase("POLYLINE") || type.equalsIgnoreCase("POLYGON"))) {/* * 判断当是面状要素时添加第一个点到poly上. */if (type.equalsIgnoreCase("POLYGON")) {poly.lineTo((float) startPoint.getX(),(float) startPoint.getY());}startPoint = null;return true;}return super.onDragPointerUp(from, to);}}}