上次我们一块研究下了最基本的POI检索，今天我们来看下，个人觉得比较有用的公交线路检索。

下面我们看下这个类中的方法

程序包 com.baidu.mapapi.search.busline

>>usLineSearch

>>BusLineSearchOption 参数如下

结合POI搜索完成今天的例子

xml文件依旧仅仅包含一个listview

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".IndexActivity" >

    <ListView
        android:id="@+id/mylistView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

package com.flyou.hellomap;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.search.busline.BusLineResult;
import com.baidu.mapapi.search.busline.BusLineResult.BusStation;
import com.baidu.mapapi.search.busline.BusLineSearch;
import com.baidu.mapapi.search.busline.BusLineSearchOption;
import com.baidu.mapapi.search.busline.OnGetBusLineSearchResultListener;
import com.baidu.mapapi.search.core.CityInfo;
import com.baidu.mapapi.search.core.PoiInfo;
import com.baidu.mapapi.search.core.SearchResult;
import com.baidu.mapapi.search.poi.OnGetPoiSearchResultListener;
import com.baidu.mapapi.search.poi.PoiCitySearchOption;
import com.baidu.mapapi.search.poi.PoiDetailResult;
import com.baidu.mapapi.search.poi.PoiResult;
import com.baidu.mapapi.search.poi.PoiSearch;

public class BusMapActivity extends Activity {
  private int totalpages = 0;
  private ListView listView = null;
  private PoiSearch poiSearch;
  private int currentPage = 0;
  ArrayAdapter<String> adapter = null;
  protected String busLineId;
 private  BusLineSearch buslineSearch ;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // 在使用SDK各组件之前初始化context信息，传入ApplicationContext
    // 注意该方法要再setContentView方法之前实现
    SDKInitializer.initialize(getApplicationContext());

    setContentView(R.layout.activity_index);

    listView = (ListView) findViewById(R.id.mylistView);

    // 第一步，创建POI检索实例
    poiSearch = PoiSearch.newInstance();
    // 第三步，设置POI检索监听者；
    poiSearch.setOnGetPoiSearchResultListener(poiListener);

    // 第一步，创建Busline检索实例
    buslineSearch = BusLineSearch.newInstance();
    // 第三步，设置<span style="font-family: Arial, Helvetica, sans-serif;">Busline</span><span style="font-family: Arial, Helvetica, sans-serif;">检索监听者；</span>
    buslineSearch.setOnGetBusLineSearchResultListener(busLineListener);

  }
 <span style="color:#ff0000;"> OnGetBusLineSearchResultListener busLineListener =new OnGetBusLineSearchResultListener() {

    @Override
    public void onGetBusLineResult(BusLineResult result) {
      String title;
      List<BusStation> stations = result.getStations();
      List<String> datas=new ArrayList<String>();
      for (BusStation busStation : stations) {
        title = busStation.getTitle();
        datas.add(title);
      }</span>

      listView.setAdapter(new ArrayAdapter<String>(BusMapActivity.this, android.R.layout.simple_list_item_1, datas));
    }
  };
  // 第二步，创建POI检索监听者；
  OnGetPoiSearchResultListener poiListener = new OnGetPoiSearchResultListener() {

    public void onGetPoiResult(PoiResult result) {
      // 获取POI检索结果
      if (result == null || result.error == SearchResult.ERRORNO.RESULT_NOT_FOUND) {
        Toast.makeText(BusMapActivity.this, "未找到结果", Toast.LENGTH_LONG).show();
        return;
      }
      if (result.error == SearchResult.ERRORNO.NO_ERROR) {
        List<PoiInfo> allPoi = result.getAllPoi();
        totalpages = result.getTotalPageNum();

        String[] datas = new String[10];
        //遍历所有POI，找到类型为公交线路的POI
       <span style="color:#ff0000;"> for (PoiInfo poi : result.getAllPoi()) {
            if (poi.type == PoiInfo.POITYPE.BUS_LINE ||poi.type == PoiInfo.POITYPE.SUBWAY_LINE) {
                //说明该条POI为公交信息，获取该条POI的UID
                busLineId = poi.uid;
                break;
            }
        }

        //如下代码为发起检索代码，定义监听者和设置监听器的方法与POI中的类似
        buslineSearch  .searchBusLine((new BusLineSearchOption()
             .city("开封")
             .uid(busLineId)));</span>
      }
      if (result.error == SearchResult.ERRORNO.AMBIGUOUS_KEYWORD) {

        // 当输入关键字在本市没有找到，但在其他城市找到时，返回包含该关键字信息的城市列表
        String strInfo = "在";
        for (CityInfo cityInfo : result.getSuggestCityList()) {
          strInfo += cityInfo.city;
          strInfo += ",";
        }
        strInfo += "找到结果";
        Toast.makeText(BusMapActivity.this, strInfo, Toast.LENGTH_LONG).show();
      }
    }

    public void onGetPoiDetailResult(PoiDetailResult result) {
      // 获取Place详情页检索结果

    }
  };

  @Override
  protected void onDestroy() {
    super.onDestroy();
    // 在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理
    poiSearch.destroy();
  }

  @Override
  protected void onResume() {
    super.onResume();
    // 在activity执行onResume时执行mMapView. onResume ()，实现地图生命周期管理

  }

  @Override
  protected void onPause() {
    super.onPause();
    // 在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理

  }

  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {

    switch (keyCode) {
      case KeyEvent.KEYCODE_MENU:
        /**
         * 范围检索 // 这是范围 LatLngBounds.Builder b = new LatLngBounds.Builder();
         * b.include(new LatLng(39.976446, 116.320331)); b.include(new
         * LatLng(39.900766, 116.32838)); b.include(new LatLng(39.910065,
         * 116.491081)); b.include(new LatLng(39.976004, 116.475558));
         * LatLngBounds build = b.build(); // 第四步，发起检索请求；
         * poiSearch.searchInBound(new
         * PoiBoundSearchOption().bound(build).keyword
         * ("美食").pageNum(currentPage));
         */

      <span style="color:#ff0000;">    poiSearch.searchInCity((new
         PoiCitySearchOption()).city("开封").keyword(
          "33").pageNum(currentPage));</span>

        /**
         * poiSearch.searchNearby(new PoiNearbySearchOption() .keyword("大学")
         * .location(new LatLng(34.82336,114.31496)) .radius(3000)
         * );//可以为定位的坐标也可自己制定
         */
        currentPage++;
        if (currentPage == totalpages) {
          currentPage = 0;
        }
        break;

    }
    return super.onKeyDown(keyCode, event);
  }
}

运行结果为开封市33路的线路

下图为百度搜索的结果