ArcGIS for Android入门程序之DrawTool2.0

来自：http://blog.csdn.net/arcgis_mobile/article/details/8084763

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：

<span style="font-family:Courier New;font-size:18px;">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();
    }
}</span>

在Android模拟器执行效果图如下：