ArcGIS for Android示例解析之地理编码服务-----AGS_Locator
AGS_Locator
上面我们介绍了GP服务的示例，下面我们介绍一下地理编码服务是如何调用的，在示例中总共涉及到了两种查询方式的运用，一个是地理编码查询，一个是反地理编码查询，首先我们来看地理编码查询，代码如下：
| /* * 执行地理编码查询. */ class AgsLocator extends AsyncTask<java.util.Map<java.lang.String, java.lang.String>, Void, java.util.List<LocatorGeocodeResult>> {
@Override protected void onPostExecute(java.util.List<LocatorGeocodeResult> result) {
if (result.size() == 0) { Toast toast = Toast.makeText(AGS_Locator.this, "No result found.", Toast.LENGTH_SHORT); toast.show();
} else { dialog = ProgressDialog.show(AGS_Locator.this, "", "Loading. Please wait...", true, true); cancelLocate = new Timer(); cancelLocate.schedule(new TimerTask() {
@Override public void run() { uiHandler.sendEmptyMessage(CANCEL_LOADING_WINDOW); }
}, 60000);
// Create graphic to add locator result to map
Geometry geomS = result.get(0).getLocation(); SimpleMarkerSymbol smsS = new SimpleMarkerSymbol(Color.RED, 10, SimpleMarkerSymbol.STYLE.DIAMOND); Graphic graphicS = new Graphic( geomS, smsS );
Geometry geomT = result.get(0).getLocation(); TextSymbol tsT = new TextSymbol(16, result.get(0).getAddress(), Color.BLACK); tsT.setOffsetX(15); tsT.setOffsetY(15); Graphic graphicT = new Graphic( geomT, tsT );
/* * add the updated graphic to graphics layer and display the * result on the map */ graphicsLayer.addGraphic(graphicS); graphicsLayer.addGraphic(graphicT);
// zoom to the locator result map.zoomTo(result.get(0).getLocation(), 2);
uiHandler.sendEmptyMessage(CLOSE_LOADING_WINDOW);
} }
@Override protected List<LocatorGeocodeResult> doInBackground( Map<String, String>... params) {
int wkid = map.getSpatialReference().getID(); List<LocatorGeocodeResult> results = null;
// 初始化地理编码服务 al = new Locator( "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Locators/ESRI_Geocode_USA/GeocodeServer"); try {
// 地理编码查询 results = al.geocode(params[0], null, wkid); } catch (Exception e) { e.getMessage(); } return results; }
} |
下面来看一下反地理编码的代码：
| map.setOnSingleTapListener(new OnSingleTapListener() {
private static final long serialVersionUID = 1L;
public void onSingleTap(final float x, final float y) {
graphicsLayer.removeAll();
// retrieve the user clicked location final Point loc = map.toMapPoint(x, y);
// i初始化地理编码服务 al = new Locator( "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Locators/ESRI_Geocode_USA/GeocodeServer"); try {
int wkid = map.getSpatialReference().getID(); // 使其变成反地理编码并进行查询 LocatorReverseGeocodeResult result = al.reverseGeocode(loc, 1000.00, wkid, wkid); |