ArcGIS二维地图标绘

[android]代码库

/**
     * 地图控件单击事件
     * @param e 屏幕单击事件
     * @return boolean
     */
    public boolean onSingleTap(MotionEvent e) {
    	
    	// 如果正处于编辑状态且不处于查询状态
    	if(!isQuery&&isEdit){
    	
	    	// 设置浮动按钮可见
	    	save.setVisibility(Button.VISIBLE);
	    	cancel.setVisibility(Button.VISIBLE);
	    	
	    	// 如果当前正在编辑的类型为点
	    	if (geometryType.length() > 1 && geometryType.equalsIgnoreCase("POINT") && isEdit) {
	    		
				// 绘制点时首先清除图层要素
				Log.d(TAG,"---->lastPointID:"+lastGraphicID);
				Log.d(TAG,"---->lastType:"+lastType);
				
				if(lastGraphicID!=-1&&lastType.equalsIgnoreCase(geometryTypes[0])){
					
					gLayer.updateGraphic(lastGraphicID, map.toMapPoint(new Point(e.getX(), e.getY())));
					
					Log.d(TAG,"---->Update Point----<");
				
				}else{
					
		    		Graphic graphic = new Graphic(map.toMapPoint(new Point(e.getX(), e.getY())),new SimpleMarkerSymbol(Color.RED,10,STYLE.CIRCLE),graphicAttributes,null);
		    		
		    		Log.d(TAG,"---->Add Point----<");
		    		// 将新建点要素添加到图层上
		    		lastGraphicID = gLayer.addGraphic(graphic);
		    		
		    		map.addLayer(gLayer);
				}
				Log.d(TAG,"---->NowPointID:"+lastGraphicID);
				
				lastType = geometryTypes[0];
	    			
	    	}else if(geometryType.length() > 1&& (geometryType.equalsIgnoreCase("POLYLINE"))&& isEdit) {
	    		// 如果当前正在编辑的类型为线
	    		Log.d(TAG,"---->L lastType:"+lastType);
	    		// 得到移动后的点
	            Point movePoint = new Point(map.toMapPoint(e.getX(), e.getY()).getX(),map.toMapPoint(e.getX(), e.getY()).getY());
	            
	            // 判断startPoint是否为空,如果为空，给startPoint赋值
	            if (startPoint == null) {
	
	            	polyline = new Polyline();
	
	            	startPoint = new Point(movePoint.getX(),movePoint.getY());
	
	           		//将第一个点存入poly中
	            	polyline.startPath(startPoint);
	            	
	            }else{
	            	// 如果要素存在两点以上（即存在线段）
	            	if(lastGraphicID!=-1&&lastType.equalsIgnoreCase(geometryTypes[1])&&polyline.getPointCount()>1){
	            		
	            		// 将移动的点放入poly中
		            	polyline.lineTo(movePoint);
	            		
	            		gLayer.updateGraphic(lastGraphicID,polyline);
	            		
	            		map.addLayer(gLayer);
			            
	            	}else{
		            	// 将移动的点放入poly中
		            	polyline.lineTo(movePoint);
			            
			            Graphic linegraphic = new Graphic(polyline,new SimpleLineSymbol(Color.RED, 3),graphicAttributes,null);
			            
			            lastGraphicID = gLayer.addGraphic(linegraphic);
			
			    		map.addLayer(gLayer);
	            	}
		    		
	            }
	            lastType = geometryTypes[1];
	
	    	}else if(geometryType.length() > 1&& (geometryType.equalsIgnoreCase("POLYGON"))&& isEdit) {
	    		// 如果当前正在编辑的类型为面
	    		Log.d(TAG,"---->G lastType:"+lastType);
	    		// 得到移动后的点
	            Point movePoint = map.toMapPoint(e.getX(), e.getY());
	            
	            // 判断startPoint是否为空,如果为空，给startPoint赋值
	            if (startPoint == null) {
	            	
	            	startPoint = new Point(movePoint.getX(),movePoint.getY());
	
	           		// 将第一个点存入polygon中
	            	polygon.startPath(startPoint);
	            	
	            	Log.d(TAG, "First Point Polygon!");
	            	
	            }else{
	            	// 将后续点加入polygon中
	            	polygon.lineTo(movePoint);
	            	// 如果上一要素类型为polygon
	            	if(lastGraphicID!=-1&&lastType.equalsIgnoreCase(geometryTypes[2])&&polygon.getPointCount()>3){
	            		// 将起点加入要素中，闭合图形
		            	polygon.lineTo(startPoint);
		            	// 更新图形信息
			            gLayer.updateGraphic(lastGraphicID, polygon);
			            
			            map.addLayer(gLayer);
			            // 移除闭合点
			            polygon.removePoint(0, -1);
			            
			            Log.d(TAG,"Polygon Point >3:");
			            
	            	}else if(lastType.equalsIgnoreCase(geometryTypes[2])&&polygon.getPointCount()==3){
	            		// 将起点加入要素中，闭合图形
	            		polygon.lineTo(startPoint);
		            	// 新建闭合
		            	Graphic areagraphic = new Graphic(polygon,new SimpleFillSymbol(Color.GRAY),graphicAttributes,null);
			            // 保存当前图形ID
			            lastGraphicID = gLayer.addGraphic(areagraphic);
			            // 移除闭合点
			            polygon.removePoint(0, -1);
			            
			            map.addLayer(gLayer);
			            
			            Log.d(TAG,"Polygon Point 3:");
	            	}
	            	Log.d(TAG,"Polygon Point Count:"+polygon.getPointCount());
	            	Log.d(TAG,"Polygon LastGraohic ID:"+lastGraphicID);
	            }
	            lastType = geometryTypes[2];
	    	}
	    	hasFinish = false;
	    	
	    	return true;
	    	
	    }