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《ArcGIS Runtime SDK for Android开发笔记》——（15）、要素绘制Drawtools3.0工具DEMO

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06/28
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1、前言

移动GIS项目开发中点线面的要素绘制及编辑是最常用的操作，在ArcGIS Runtime SDK for iOS 自带AGSSketchLayer类可以帮助用户快速实现要素的绘制，图形编辑。但是在ArcGIS Runtime SDK for Android的版本中并没有提供类似的功能，实现过程相对较复杂。（10.2.8及以下版本需要用户自定义扩展实现，通过扩展MapOnTouchListener类实现，Quartz版SDK默认自带）

之前有大神gispace封装了DrawTools2.0工具类DEMO，实现了简单的要素绘制。但是并没有对要素绘制及编辑状态做很好的体现，如节点，回退操作等。所以鉴于此，我在DrawTools2.0工具类基础上扩展实现了DrawTools3.0，该版本能够实现基本点线面要素的绘制，精细化展现节点变化信息，支持加点，删点，移点操作。

DrawTools2.0地址：http://blog.csdn.net/gispace/article/details/6723459

转载请注明出处：http://www.cnblogs.com/gis-luq/p/5857661.html

2、使用说明

DrawTools3.0基于DrawTools2.0扩展开发而来，使用思路基本一致，增加节点增加、节点删除、回退操作，要素编辑状态开启与关闭操作。

开源项目库地址：http://git.oschina.net/gis-luq/DrawTool3.0

使用流程

  1. 初始化DrawTool工具。
  2. 使用Activity扩展DrawEventListener ，并将当前Activity设置为DrawTool的Listener。
  3. 实现DrawEventListener中的handleDrawEvent方法。
  4. 使用DrawTool工具绘制图形。

MainActivity.java

package com.gis_luq.drawtoolsdemo;import android.app.Activity;
import android.content.Context;
import android.os.Bundle;import android.widget.Button;import com.esri.android.map.GraphicsLayer;
import com.esri.android.map.MapOnTouchListener;
import com.esri.android.map.MapView;
import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;
import com.esri.core.map.Graphic;
import com.esri.core.table.TableException;
import com.gis_luq.lib.Draw.DrawEvent;
import com.gis_luq.lib.Draw.DrawEventListener;
import com.gis_luq.lib.Draw.DrawTool;import java.io.FileNotFoundException;public class MainActivity extends Activity implements DrawEventListener { private Context context;
private MapView mapView = null;
private ArcGISTiledMapServiceLayer arcGISTiledMapServiceLayer = null;
private GraphicsLayer graphicsLayer = null; private Graphic selectGraphic = null;
private DrawTool drawTool; public MapOnTouchListener mapDefaultOnTouchListener;//默认点击事件
public DrawEventListener drawEventListener;//要素绘制点击事件 @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); context = this; this.mapView = (MapView)this.findViewById(R.id.map);//设置UI和代码绑定 String strMapUrl="http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineCommunity/MapServer";
this.arcGISTiledMapServiceLayer = new ArcGISTiledMapServiceLayer(strMapUrl);
this.mapView.addLayer(arcGISTiledMapServiceLayer); graphicsLayer = new GraphicsLayer();
this.mapView.addLayer(graphicsLayer); // 初始化DrawTool实例
this.drawTool = new DrawTool(this.mapView);
// 将本Activity设置为DrawTool实例的Listener
this.drawTool.addEventListener(this); //设置地图事件
mapDefaultOnTouchListener = new MapOnTouchListener(this.mapView.getContext(), this.mapView);
drawEventListener = this; ToolsOnClickListener toolsOnClickListener = new ToolsOnClickListener(context,drawTool,selectGraphic,mapView);
Button btnDrawPoint = (Button)this.findViewById(R.id.btnDrawPoint);
btnDrawPoint.setOnClickListener(toolsOnClickListener); Button btnDrawPolyline = (Button)this.findViewById(R.id.btnDrawPolyline);
btnDrawPolyline.setOnClickListener(toolsOnClickListener); Button btnDrawFreePolyline = (Button)this.findViewById(R.id.btnDrawFreePolyline);
btnDrawFreePolyline.setOnClickListener(toolsOnClickListener); Button btnDrawPolygon = (Button)this.findViewById(R.id.btnDrawPolygon);
btnDrawPolygon.setOnClickListener(toolsOnClickListener); Button btnDrawFreePolygon = (Button)this.findViewById(R.id.btnDrawFreePolygon);
btnDrawFreePolygon.setOnClickListener(toolsOnClickListener); Button btnDrawCircle = (Button)this.findViewById(R.id.btnDrawCircle);
btnDrawCircle.setOnClickListener(toolsOnClickListener); Button btnDrawEnvlope = (Button)this.findViewById(R.id.btnDrawEnvlope);
btnDrawEnvlope.setOnClickListener(toolsOnClickListener); Button btnDrawEditor = (Button)this.findViewById(R.id.btnDrawSave);
btnDrawEditor.setOnClickListener(toolsOnClickListener); Button btnDrawUndo = (Button)this.findViewById(R.id.btnDrawUndo);
btnDrawUndo.setOnClickListener(toolsOnClickListener); Button btnDrawDeleteNode = (Button)this.findViewById(R.id.btnDrawDeleteNode);
btnDrawDeleteNode.setOnClickListener(toolsOnClickListener); } @Override
public void handleDrawEvent(DrawEvent event) throws TableException, FileNotFoundException {
// 将画好的图形（已经实例化了Graphic），添加到drawLayer中并刷新显示
this.graphicsLayer.addGraphic(event.getDrawGraphic());
// 修改点击事件为默认
this.mapView.setOnTouchListener(mapDefaultOnTouchListener);
}
}

ToolsOnClickListener.java

package com.gis_luq.drawtoolsdemo;import android.content.Context;
import android.view.View;import com.esri.android.map.MapView;
import com.esri.core.map.Graphic;
import com.gis_luq.lib.Draw.DrawTool;/**
* 绘图点击事件
* Created by gis-luq on 2016/1/2.
*/
public class ToolsOnClickListener implements View.OnClickListener { private Context context = null;
private DrawTool drawTool = null;
private Graphic selectGraphic =null;
private MapView mapView = null; public ToolsOnClickListener(Context context, DrawTool drawTool, Graphic selectGraphic, MapView mapView) {
this.context = context;
this.drawTool = drawTool;
this.selectGraphic = selectGraphic;
this.mapView = mapView;
} @Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnDrawPoint://绘制点
drawTool.activate(DrawTool.POINT);
break;
case R.id.btnDrawPolyline://绘制线
drawTool.activate(DrawTool.POLYLINE);
break;
case R.id.btnDrawFreePolyline://绘制流状线
drawTool.activate(DrawTool.FREEHAND_POLYLINE);
break;
case R.id.btnDrawPolygon://绘制面
drawTool.activate(DrawTool.POLYGON);
break;
case R.id.btnDrawFreePolygon://绘制流状面
drawTool.activate(DrawTool.FREEHAND_POLYGON);
break;
case R.id.btnDrawCircle://绘制圆
drawTool.activate(DrawTool.CIRCLE);
break;
case R.id.btnDrawEnvlope://绘制矩形
drawTool.activate(DrawTool.ENVELOPE);
break;
case R.id.btnDrawSave://保存
drawTool.sendDrawEndEvent();
break;
case R.id.btnDrawUndo://回退
drawTool.actionUndo();
break;
case R.id.btnDrawDeleteNode://删除节点
drawTool.actionDelete();
break;
} }
}