百度地图之云检索功能
下面介绍百度Demo提供的最后一个功能：云检索功能。该示例主要为海量位置数据的存储、检索、展示提供了一种解决方案。里面用的是测试的ak，如果开发者要使用自己的数据，则需要使用自己申请的ak。代码如下：
云检索功能介绍类（CloudSearchDemo）：
package com.home;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;public class CloudSearchDemo extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_cloud_search_demo);}public void startCloudSearchDemo(View view) {Intent intent = new Intent();intent.setClass(this, CloudSearchActivity.class);startActivity(intent);}}
CloudSearchDemo对应的布局XML：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/white" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="36dp" android:text="@string/cloud_search_tips" android:textColor="@android:color/black" android:textSize="16sp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:layout_marginTop="32dp" android:onClick="startCloudSearchDemo" android:text="开始体验" /></RelativeLayout>
string/cloud_search_tips：
<string name="cloud_search_tips"> \t\tLBS.云是百度地图针对LBS开发者推出的平台级服务。结合已有的地图API和SDK服务。通过开放服务端存储和计算能力,提供海量位置数据存储、检索、展示一体化解决方案。\n\n \t\t该服务对开发者免费开放。测试demo里写入了测试的ak。开发者可以使用测试ak查看 LBS.云检索的效果。如果开发者要使用自己的数据，请在申请ak后替换demo中的ak。\n\n \t\t如有任何关于LBS.云服务的问题,诸如如何申请ak、如何存储和检索数据等，请访问百度地图官方“LBS开放平台”。地址：http://lbsyun.baidu.com/ \n</string>
云检索主Activity：
package com.home;import java.util.List;import android.app.Activity;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.view.View;import android.widget.Toast;import com.baidu.mapapi.BMapManager;import com.baidu.mapapi.cloud.Bounds;import com.baidu.mapapi.cloud.BoundsSearchInfo;import com.baidu.mapapi.cloud.CustomPoiInfo;import com.baidu.mapapi.cloud.DetailResult;import com.baidu.mapapi.cloud.DetailSearchInfo;import com.baidu.mapapi.cloud.GeoSearchListener;import com.baidu.mapapi.cloud.GeoSearchManager;import com.baidu.mapapi.cloud.GeoSearchResult;import com.baidu.mapapi.cloud.NearbySearchInfo;import com.baidu.mapapi.cloud.RegionSearchInfo;import com.baidu.mapapi.map.ItemizedOverlay;import com.baidu.mapapi.map.MapView;import com.baidu.mapapi.map.OverlayItem;import com.baidu.platform.comapi.basestruct.GeoPoint;public class CloudSearchActivity extends Activity implements GeoSearchListener {private MapView mMapView;@Overrideprotected void onCreate(Bundle icicle) {super.onCreate(icicle);DemoApplication app = (DemoApplication) this.getApplication();if (app.mBMapManager == null) {app.mBMapManager = new BMapManager(this);app.mBMapManager.init(DemoApplication.strKey,new DemoApplication.MyGeneralListener());}setContentView(R.layout.lbs_search);GeoSearchManager.getInstance().init(CloudSearchActivity.this);mMapView = (MapView) findViewById(R.id.bmapView);mMapView.getController().enableClick(true);mMapView.getController().setZoom(12);mMapView.setDoubleClickZooming(true);}@Overridepublic void onGetGeoDetailsResult(DetailResult result, int type, int iError) {if (result != null) {if (result.content != null) {Toast.makeText(CloudSearchActivity.this, result.content.name,Toast.LENGTH_SHORT).show();} else {Toast.makeText(CloudSearchActivity.this,"status:" + result.status, Toast.LENGTH_SHORT).show();}}}@Overridepublic void onGetGeoResult(GeoSearchResult result, int type, int iError) {if (result != null && result.poiList != null&& result.poiList.size() > 0) {CloudOverlay poiOverlay = new CloudOverlay(this, mMapView);poiOverlay.setData(result.poiList);mMapView.getOverlays().clear();mMapView.getOverlays().add(poiOverlay);mMapView.refresh();mMapView.getController().animateTo(new GeoPoint((int) (result.poiList.get(0).latitude * 1e6),(int) (result.poiList.get(0).longitude * 1e6)));}}@Overrideprotected void onPause() {mMapView.onPause();super.onPause();}@Overrideprotected void onResume() {mMapView.onResume();super.onResume();}@Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);mMapView.onSaveInstanceState(outState);}@Overrideprotected void onRestoreInstanceState(Bundle savedInstanceState) {super.onRestoreInstanceState(savedInstanceState);mMapView.onRestoreInstanceState(savedInstanceState);}@Overrideprotected void onDestroy() {mMapView.destroy();super.onDestroy();}public void click(View v) {if (v.getId() == R.id.regionSearch) {RegionSearchInfo r = new RegionSearchInfo();r.queryWords = "北京市五中";r.ak = "3307f6443b2bdcae21af5d9564b5a88c";r.cityName = "北京";r.filter.put("databox", 848);r.scope = 2;GeoSearchManager.getInstance().searchRegion(r);}if (v.getId() == R.id.nearbySearch) {NearbySearchInfo r = new NearbySearchInfo();r.queryWords = "北京";r.ak = "3307f6443b2bdcae21af5d9564b5a88c";r.location = new GeoPoint(39956948, 116412214);r.radius = 10000000;r.filter.put("databox", 848);r.scope = 2;GeoSearchManager.getInstance().searchNearby(r);}if (v.getId() == R.id.boundsSearch) {BoundsSearchInfo r = new BoundsSearchInfo();r.queryWords = "五中";r.ak = "3307f6443b2bdcae21af5d9564b5a88c";r.bounds = new Bounds(39843895, 116402214, 40956948, 116431457);r.filter.put("databox", 848);r.scope = 2;GeoSearchManager.getInstance().searchBounds(r);}if (v.getId() == R.id.detailsSearch) {DetailSearchInfo r = new DetailSearchInfo();r.id = 81217;r.ak = "3307f6443b2bdcae21af5d9564b5a88c";r.scope = 2;GeoSearchManager.getInstance().searchDetail(r);}}}class CloudOverlay extends ItemizedOverlay {List<CustomPoiInfo> mLbsPoints;Activity mContext;public CloudOverlay(Activity context, MapView mMapView) {super(null, mMapView);mContext = context;}public void setData(List<CustomPoiInfo> lbsPoints) {if (lbsPoints != null) {mLbsPoints = lbsPoints;}for (CustomPoiInfo rec : mLbsPoints) {GeoPoint pt = new GeoPoint((int) (rec.latitude * 1e6),(int) (rec.longitude * 1e6));OverlayItem item = new OverlayItem(pt, rec.name, rec.address);Drawable marker1 = this.mContext.getResources().getDrawable(R.drawable.icon_marka);item.setMarker(marker1);addItem(item);}}@Overrideprotected Object clone() throws CloneNotSupportedException {return super.clone();}@Overrideprotected boolean onTap(int arg0) {CustomPoiInfo item = mLbsPoints.get(arg0);Toast.makeText(mContext, item.name, Toast.LENGTH_SHORT).show();return super.onTap(arg0);}}其布局文件：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/regionSearch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="click" android:text="本地搜索" /> <Button android:id="@+id/nearbySearch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="click" android:text="周边搜索" /> <Button android:id="@+id/boundsSearch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="click" android:text="区域搜索" /> <Button android:id="@+id/detailsSearch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="click" android:text="详情搜索" /> </LinearLayout> <com.baidu.mapapi.map.MapView android:id="@+id/bmapView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true" /></LinearLayout>
配置文件和Application类与之前的一样。
附上图片效果：
