Android学习笔记之百度地图（POI搜索之周边检索poiSearchNearBy）

POI搜索有三种方式，根据范围和检索词发起范围检索poiSearchInbounds，城市poi检索poiSearchInCity，周边检索poiSearchNearBy。

下以周边检索为例介绍如何进行检索并显示覆盖物PoiOverlay：

public int poiSearchNearBy(java.lang.String key, GeoPoint pt, int radius)

根据中心点、半径与检索词发起周边检索. 

异步函数，返回结果在MKSearchListener里的onGetPoiResult方法通知

参数：

key - 关键词

pt - 中心点地理坐标

radius - 半径，单位:米

返回：

成功返回0，否则返回-1

Demo: 检索天安门周边5000米之内的KFC餐厅

mMKSearch.poiSearchNearBy("KFC", new GeoPoint((int) (39.915 * 1E6), (int) (116.404 * 1E6)), 5000);

实现MySearchListener的onGetPoiResult，并展示检索结果：

public void onGetPoiResult(MKPoiResult result, int type, int iError) {    if (result == null) {        return;    }    PoiOverlay poioverlay = new PoiOverlay(MyMapActivity.this, mMapView);    poioverlay.setData(result.getAllPoi());    mMapView.getOverlays().add(poioverlay);}

具体实现：

package xiaosi.baiduMap;import android.os.Bundle;import com.baidu.mapapi.BMapManager;import com.baidu.mapapi.GeoPoint;import com.baidu.mapapi.MKAddrInfo;import com.baidu.mapapi.MKDrivingRouteResult;import com.baidu.mapapi.MKPoiResult;import com.baidu.mapapi.MKSearch;import com.baidu.mapapi.MKSearchListener;import com.baidu.mapapi.MKTransitRouteResult;import com.baidu.mapapi.MKWalkingRouteResult;import com.baidu.mapapi.MapActivity;import com.baidu.mapapi.MapController;import com.baidu.mapapi.MapView;import com.baidu.mapapi.PoiOverlay;public class BaiduMapActivity extends MapActivity{/** Called when the activity is first created. */private BMapManager mapManager = null;private String key = "1B79478DA01F7800AEA8602517A6D89B38151105";private MapView mapView = null;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);mapManager = new BMapManager(getApplication());mapManager.init(key, null);super.initMapActivity(mapManager);mapView = (MapView) findViewById(R.id.mapsView);mapView.setBuiltInZoomControls(true); // 设置启用内置的缩放控件MapController mapController = mapView.getController(); // 得到mMapView的控制权,可以用它控制和驱动平移和缩放mapController.setZoom(12); // 设置地图zoom级别MKSearch mKSearch = new MKSearch();mKSearch.init(mapManager, new MySearchListener());// 注意，MKSearchListener只支持一个，以最后一次设置为准mKSearch.poiSearchNearBy("KFC", new GeoPoint((int) (39.915 * 1E6),(int) (116.404 * 1E6)), 5000);}public class MySearchListener implements MKSearchListener{public void onGetAddrResult(MKAddrInfo arg0, int arg1){}public void onGetDrivingRouteResult(MKDrivingRouteResult arg0, int arg1){}public void onGetPoiResult(MKPoiResult arg0, int arg1, int arg2){if (arg0 == null) {        return;    }    PoiOverlay poioverlay = new PoiOverlay(BaiduMapActivity.this, mapView);    poioverlay.setData(arg0.getAllPoi());    mapView.getOverlays().add(poioverlay);}public void onGetTransitRouteResult(MKTransitRouteResult arg0, int arg1){}public void onGetWalkingRouteResult(MKWalkingRouteResult arg0, int arg1){}}@Overrideprotected boolean isRouteDisplayed(){return false;}@Overrideprotected void onDestroy(){if (mapManager != null){mapManager.destroy();mapManager = null;}super.onDestroy();}@Overrideprotected void onPause(){if (mapManager != null){mapManager.stop();}super.onPause();}@Overrideprotected void onResume(){if (mapManager != null){mapManager.start();}super.onResume();}}