【技术直通车】ArcGIS for Android入门程序之DrawTool2.0

GISpace博客《ArcGIS for Android入门程序之DrawTool》http://blog.csdn.net/gispace/article/details/6723459 在ArcGIS Android SDK 0.9版本实现绘制各种几个图形。ArcGIS Android SDK目前版本为2.0，较之前版本变化较大，故将之前版本移植到2.0版本下。源代码下载地址：http://download.csdn.net/detail/arcgis_mobile/4659389

该程序主要说明如何处理与MapView交互的各种事件，以订阅发布模式封装几何图形绘制工具类DrawTool，使用方法如下：

package cn.com.esrichina.drawtool;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import com.esri.android.map.GraphicsLayer;
import com.esri.android.map.MapView;
import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;

public class DrawToolActivity extends Activity implements DrawEventListener {

	private MapView mapView;
	private GraphicsLayer drawLayer;
	private DrawTool drawTool;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		this.mapView = (MapView) this.findViewById(R.id.map);
		// 添加底图
		this.mapView
				.addLayer(new ArcGISTiledMapServiceLayer(
						"http://www.arcgisonline.cn/ArcGIS/rest/services/ChinaOnlineCommunity/MapServer"));
		// 在drawLayer上绘制几何图形
		this.drawLayer = new GraphicsLayer();
		this.mapView.addLayer(this.drawLayer);
		this.drawTool = new DrawTool(this.mapView);
		// 此类实现DawEventListener接口
		this.drawTool.addEventListener(this);
	}

	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = this.getMenuInflater();
		inflater.inflate(R.menu.menu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.point:
			drawTool.activate(DrawTool.POINT);
			break;
		case R.id.envelope:
			drawTool.activate(DrawTool.ENVELOPE);
			break;
		case R.id.polygon:
			drawTool.activate(DrawTool.POLYGON);
			break;
		case R.id.polyline:
			drawTool.activate(DrawTool.POLYLINE);
			break;
		case R.id.freehandpolygon:
			drawTool.activate(DrawTool.FREEHAND_POLYGON);
			break;
		case R.id.freehandpolyline:
			drawTool.activate(DrawTool.FREEHAND_POLYLINE);
			break;
		case R.id.circle:
			drawTool.activate(DrawTool.CIRCLE);
			break;
		case R.id.clear:
			this.drawLayer.removeAll();
			this.drawTool.deactivate();
			break;
		}
		return true;
	}

	// 实现DrawEventListener中定义的方法
	public void handleDrawEvent(DrawEvent event) {
		// 将画好的图形（已经实例化了Graphic），添加到drawLayer中并刷新显示
		this.drawLayer.addGraphic(event.getDrawGraphic());
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
	}
}

在Android模拟器执行效果图如下：