POI检索
POI~~~ Point of Interest,翻译过来就是“兴趣点”。我们在使用地图的时候,搜索周边的ktv,饭店,或者宾馆的时候,输入关键字,然后地图展示给我们很多个点,这些点就是我需要的信息。这就是所谓的兴趣点,也就是一个普通的查询,然后结果的反馈罢了。
百度地图SDK提供了三种类型的POI检索:周边检索、区域检索和城市内检索。
package com.baidu.baidupoi;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.EditText;
import android.widget.Toast;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.overlayutil.PoiOverlay;
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.PoiDetailSearchOption;
import com.baidu.mapapi.search.poi.PoiResult;
import com.baidu.mapapi.search.poi.PoiSearch;
import com.baidu.mapapi.search.sug.OnGetSuggestionResultListener;
import com.baidu.mapapi.search.sug.SuggestionResult;
import com.baidu.mapapi.search.sug.SuggestionSearch;
import com.baidu.mapapi.search.sug.SuggestionSearchOption;
/**
*
*
*
* POI检索
*
* @author Administrator
*
*/
public class MainActivity extends Activity implements
OnGetPoiSearchResultListener, OnGetSuggestionResultListener {
private PoiSearch mPoiSearch = null;
private SuggestionSearch mSuggestionSearch = null;
private BaiduMap mBaiduMap = null;
/**
* 搜索关键字输入窗口
*/
private AutoCompleteTextView keyWorldsView = null;
private ArrayAdapter<String> sugAdapter = null;
private int load_Index = 0;
MapView mMapView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
mMapView=(MapView)findViewById(R.id.bmapView);
mBaiduMap = mMapView.getMap();
// 初始化搜索模块,注册搜索事件监听
mPoiSearch = PoiSearch.newInstance();
mPoiSearch.setOnGetPoiSearchResultListener(this);
mSuggestionSearch = SuggestionSearch.newInstance();
mSuggestionSearch.setOnGetSuggestionResultListener(this);
keyWorldsView = (AutoCompleteTextView) findViewById(R.id.searchkey);
sugAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line);
keyWorldsView.setAdapter(sugAdapter);
/**
* 当输入关键字变化时,动态更新建议列表
*/
keyWorldsView.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
}
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2,
int arg3) {
if (cs.length() <= 0) {
return;
}
String city = ((EditText) findViewById(R.id.city)).getText()
.toString();
/**
* 使用建议搜索服务获取建议列表,结果在onSuggestionResult()中更新
*/
mSuggestionSearch
.requestSuggestion((new SuggestionSearchOption())
.keyword(cs.toString()).city(city));
}
});
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onDestroy() {
mPoiSearch.destroy();
mSuggestionSearch.destroy();
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
/**
* 影响搜索按钮点击事件
*
* @param v
*/
public void searchButtonProcess(View v) {
EditText editCity = (EditText) findViewById(R.id.city);
EditText editSearchKey = (EditText) findViewById(R.id.searchkey);
mPoiSearch.searchInCity((new PoiCitySearchOption())
.city(editCity.getText().toString())
.keyword(editSearchKey.getText().toString())
.pageNum(load_Index));
}
public void goToNextPage(View v) {
load_Index++;
searchButtonProcess(null);
}
public void onGetPoiResult(PoiResult result) {
if (result == null
|| result.error == SearchResult.ERRORNO.RESULT_NOT_FOUND) {
Toast.makeText(MainActivity.this, "未找到结果", Toast.LENGTH_LONG)
.show();
return;
}
if (result.error == SearchResult.ERRORNO.NO_ERROR) {
mBaiduMap.clear();
PoiOverlay overlay = new MyPoiOverlay(mBaiduMap);
mBaiduMap.setOnMarkerClickListener(overlay);
overlay.setData(result);
overlay.addToMap();
overlay.zoomToSpan();
return;
}
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(MainActivity.this, strInfo, Toast.LENGTH_LONG)
.show();
}
}
public void onGetPoiDetailResult(PoiDetailResult result) {
if (result.error != SearchResult.ERRORNO.NO_ERROR) {
Toast.makeText(MainActivity.this, "抱歉,未找到结果", Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(MainActivity.this,
result.getName() + ": " + result.getAddress(),
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onGetSuggestionResult(SuggestionResult res) {
if (res == null || res.getAllSuggestions() == null) {
return;
}
sugAdapter.clear();
for (SuggestionResult.SuggestionInfo info : res.getAllSuggestions()) {
if (info.key != null)
sugAdapter.add(info.key);
}
sugAdapter.notifyDataSetChanged();
}
private class MyPoiOverlay extends PoiOverlay {
public MyPoiOverlay(BaiduMap baiduMap) {
super(baiduMap);
}
@Override
public boolean onPoiClick(int index) {
super.onPoiClick(index);
PoiInfo poi = getPoiResult().getAllPoi().get(index);
// if (poi.hasCaterDetails) {
mPoiSearch.searchPoiDetail((new PoiDetailSearchOption())
.poiUid(poi.uid));
// }
return true;
}
}
}
<?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="50dip"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="在" >
</TextView>
<EditText
android:id="@+id/city"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="北京" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="市内找" >
</TextView>
<AutoCompleteTextView
android:id="@+id/searchkey"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.88"
android:text="餐厅" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="50dip"
android:orientation="horizontal" >
<Button
android:id="@+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="12"
android:onClick="searchButtonProcess"
android:padding="10dip"
android:text="开始" />
<Button
android:id="@+id/map_next_data"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="12"
android:onClick="goToNextPage"
android:padding="10dip"
android:text="下一组数据" />
</LinearLayout>
<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true" />
</LinearLayout>
package com.baidu.mapapi.overlayutil;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BaiduMap.OnPolylineClickListener;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.Marker;
import com.baidu.mapapi.map.Overlay;
import com.baidu.mapapi.map.OverlayOptions;
import com.baidu.mapapi.model.LatLngBounds;
import java.util.ArrayList;
import java.util.List;
import static com.baidu.mapapi.map.BaiduMap.OnMarkerClickListener;
/**
* 该类提供一个能够显示和管理多个Overlay的基类
* <p>
* 复写{@link #getOverlayOptions()} 设置欲显示和管理的Overlay列表
* </p>
* <p>
* 通过
* {@link com.baidu.mapapi.map.BaiduMap#setOnMarkerClickListener(com.baidu.mapapi.map.BaiduMap.OnMarkerClickListener)}
* 将覆盖物点击事件传递给OverlayManager后,OverlayManager才能响应点击事件。
* <p>
* 复写{@link #onMarkerClick(com.baidu.mapapi.map.Marker)} 处理Marker点击事件
* </p>
*/
public abstract class OverlayManager implements OnMarkerClickListener, OnPolylineClickListener {
BaiduMap mBaiduMap = null;
private List<OverlayOptions> mOverlayOptionList = null;
List<Overlay> mOverlayList = null;
/**
* 通过一个BaiduMap 对象构造
*
* @param baiduMap
*/
public OverlayManager(BaiduMap baiduMap) {
mBaiduMap = baiduMap;
// mBaiduMap.setOnMarkerClickListener(this);
if (mOverlayOptionList == null) {
mOverlayOptionList = new ArrayList<OverlayOptions>();
}
if (mOverlayList == null) {
mOverlayList = new ArrayList<Overlay>();
}
}
/**
* 覆写此方法设置要管理的Overlay列表
*
* @return 管理的Overlay列表
*/
public abstract List<OverlayOptions> getOverlayOptions();
/**
* 将所有Overlay 添加到地图上
*/
public final void addToMap() {
if (mBaiduMap == null) {
return;
}
removeFromMap();
List<OverlayOptions> overlayOptions = getOverlayOptions();
if (overlayOptions != null) {
mOverlayOptionList.addAll(getOverlayOptions());
}
for (OverlayOptions option : mOverlayOptionList) {
mOverlayList.add(mBaiduMap.addOverlay(option));
}
}
/**
* 将所有Overlay 从 地图上消除
*/
public final void removeFromMap() {
if (mBaiduMap == null) {
return;
}
for (Overlay marker : mOverlayList) {
marker.remove();
}
mOverlayOptionList.clear();
mOverlayList.clear();
}
/**
* 缩放地图,使所有Overlay都在合适的视野内
* <p>
* 注: 该方法只对Marker类型的overlay有效
* </p>
*
*/
public void zoomToSpan() {
if (mBaiduMap == null) {
return;
}
if (mOverlayList.size() > 0) {
LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Overlay overlay : mOverlayList) {
// polyline 中的点可能太多,只按marker 缩放
if (overlay instanceof Marker) {
builder.include(((Marker) overlay).getPosition());
}
}
mBaiduMap.setMapStatus(MapStatusUpdateFactory
.newLatLngBounds(builder.build()));
}
}
}
package com.baidu.mapapi.overlayutil;
import android.os.Bundle;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
import com.baidu.mapapi.map.Marker;
import com.baidu.mapapi.map.MarkerOptions;
import com.baidu.mapapi.map.OverlayOptions;
import com.baidu.mapapi.map.Polyline;
import com.baidu.mapapi.search.poi.PoiResult;
import java.util.ArrayList;
import java.util.List;
/**
* 用于显示poi的overly
*/
public class PoiOverlay extends OverlayManager {
private static final int MAX_POI_SIZE = 10;
private PoiResult mPoiResult = null;
/**
* 构造函数
*
* @param baiduMap
* 该 PoiOverlay 引用的 BaiduMap 对象
*/
public PoiOverlay(BaiduMap baiduMap) {
super(baiduMap);
}
/**
* 设置POI数据
*
* @param poiResult
* 设置POI数据
*/
public void setData(PoiResult poiResult) {
this.mPoiResult = poiResult;
}
@Override
public final List<OverlayOptions> getOverlayOptions() {
if (mPoiResult == null || mPoiResult.getAllPoi() == null) {
return null;
}
List<OverlayOptions> markerList = new ArrayList<OverlayOptions>();
int markerSize = 0;
for (int i = 0; i < mPoiResult.getAllPoi().size()
&& markerSize < MAX_POI_SIZE; i++) {
if (mPoiResult.getAllPoi().get(i).location == null) {
continue;
}
markerSize++;
Bundle bundle = new Bundle();
bundle.putInt("index", i);
markerList.add(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromAssetWithDpi("Icon_mark"
+ markerSize + ".png")).extraInfo(bundle)
.position(mPoiResult.getAllPoi().get(i).location));
}
return markerList;
}
/**
* 获取该 PoiOverlay 的 poi数据
*
* @return
*/
public PoiResult getPoiResult() {
return mPoiResult;
}
/**
* 覆写此方法以改变默认点击行为
*
* @param i
* 被点击的poi在
* {@link com.baidu.mapapi.search.poi.PoiResult#getAllPoi()} 中的索引
* @return
*/
public boolean onPoiClick(int i) {
// if (mPoiResult.getAllPoi() != null
// && mPoiResult.getAllPoi().get(i) != null) {
// Toast.makeText(BMapManager.getInstance().getContext(),
// mPoiResult.getAllPoi().get(i).name, Toast.LENGTH_LONG)
// .show();
// }
return false;
}
@Override
public final boolean onMarkerClick(Marker marker) {
if (!mOverlayList.contains(marker)) {
return false;
}
if (marker.getExtraInfo() != null) {
return onPoiClick(marker.getExtraInfo().getInt("index"));
}
return false;
}
@Override
public boolean onPolylineClick(Polyline polyline) {
// TODO Auto-generated method stub
return false;
}
}