http://blog.csdn.net/lyq8479/article/details/6387860
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本文主要讲解如何通过百度地图API根据某个经纬度值(地理坐标)查询对应的地址信息以及该地址周边的POI(Point of Interest,兴趣点)信息。
??????百度地图移动版API不仅包含构建地图的基本接口,还集成了众多搜索服务,包括:位置检索、周边检索、范围检索、公交检索、驾乘检索、步行检索、地址信息查询等。
????? 百度地图移动版API提供的搜索服务主要是通过初始化MKSearch类,注册搜索结果的监听对象MKSearchListener来实现异步搜索服务。首先需要自定义一个MySearchListener类,它实现MKSearchListener接口,然后通过实现接口中不同的回调方法,来获得对应的搜索结果。MySearchListener类的定义如下:
- /**?
- ?*?实现MKSearchListener接口,用于实现异步搜索服务,得到搜索结果?
- ?*??
- [email protected]?
- ?*/??
- public?class?MySearchListener?implements?MKSearchListener?{??
- ????/**?
- ?????*?根据经纬度搜索地址信息结果?
- [email protected]?
- [email protected](0表示正确返回)?
- ?????*/??
- ????@Override??
- ????public?void?onGetAddrResult(MKAddrInfo?result,?int?iError)?{??
- ????}??
- ??
- ????/**?
- ?????*?驾车路线搜索结果?
- [email protected]?
- [email protected](0表示正确返回)?
- ?????*/??
- ????@Override??
- ????public?void?onGetDrivingRouteResult(MKDrivingRouteResult?result,?int?iError)?{??
- ????}??
- ??
- ????/**?
- ?????*?POI搜索结果(范围检索、城市POI检索、周边检索)?
- [email protected]?
- [email protected](11,12,21:poi列表?7:城市列表)?
- [email protected](0表示正确返回)?
- ?????*/??
- ????@Override??
- ????public?void?onGetPoiResult(MKPoiResult?result,?int?type,?int?iError)?{??
- ????}??
- ??
- ????/**?
- ?????*?公交换乘路线搜索结果?
- [email protected]?
- [email protected](0表示正确返回)?
- ?????*/??
- ????@Override??
- ????public?void?onGetTransitRouteResult(MKTransitRouteResult?result,?int?iError)?{??
- ????}??
- ??
- ????/**?
- ?????*?步行路线搜索结果?
- [email protected]?
- [email protected](0表示正确返回)?
- ?????*/??
- ????@Override??
- ????public?void?onGetWalkingRouteResult(MKWalkingRouteResult?result,?int?iError)?{??
- ????}??
- }??
说明:上面的类定义只是在说明MKSearchListener类的5个方法的作用,全都是空实现,并未给出具体的实现。根据你要检索的内容,再去具体实现上面对应的方法,就能获取到搜索结果。例如:1)你想通过一个地理坐标(经纬度值)来搜索地址信息,那么只需要具体实现上面的onGetAddrResult()方法就能得到搜索结果;2)如果你想搜索驾车路线信息,只需要具体实现onGetDrivingRouteResult()方法就能得到搜索结果。
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紧接着,需要初始化MKSearch类:
- //?初始化MKSearch??
- mMKSearch?=?new?MKSearch();??
- mMKSearch.init(mapManager,?new?MySearchListener());??
经过上面两步之后,就可以通过调用MKSearch所提供的一些检索方法来搜索你想要的信息了。
????? 下面给出一个具体的示例:根据某个经纬度值(地理坐标)查询对应的地址信息以及该地址周边的POI(Point of Interest,兴趣点)信息。
1)布局文件res/layout/query_address.xml
?????
- <?xml?version="1.0"?encoding="utf-8"?>??
- <ScrollView?xmlns:android="http://schemas.android.com/apk/res/android"??
- ????android:layout_width="fill_parent"??
- ????android:layout_height="fill_parent">??
- ????<LinearLayout???
- ????????android:orientation="vertical"??
- ????????android:layout_width="fill_parent"??
- ????????android:layout_height="fill_parent"??
- ????????>??
- ????????<TextView??
- ????????????android:layout_width="fill_parent"??
- ????????????android:layout_height="wrap_content"??
- ????????????android:text="经度:"??
- ????????/>??
- ????????<EditText?android:id="@+id/longitude_input"??
- ????????????android:layout_width="fill_parent"??
- ????????????android:layout_height="wrap_content"???
- ????????????android:text="106.720397"??
- ????????/>??
- ??????????
- ????????<TextView??
- ????????????android:layout_width="fill_parent"??
- ????????????android:layout_height="wrap_content"??
- ????????????android:text="纬度:"??
- ????????/>??
- ????????<EditText?android:id="@+id/latitude_input"??
- ????????????android:layout_width="fill_parent"??
- ????????????android:layout_height="wrap_content"???
- ????????????android:text="26.597239"??
- ????????/>??
- ??????
- ????????<Button?android:id="@+id/query_button"??
- ????????????android:layout_width="wrap_content"??
- ????????????android:layout_height="wrap_content"??
- ????????????android:layout_gravity="right"??
- ????????????android:text="地址查询"??
- ????????/>??
- ??????????
- ????????<TextView?android:id="@+id/address_text"??
- ????????????android:layout_width="wrap_content"??
- ????????????android:layout_height="wrap_content"??
- ????????/>??
- ????????<!--???
- ????????????虽然定义了MapView,但是设置了android:visibility="gone"将其隐藏??
- ????????????因为本示例并不需要显示地图,但不定义又不行(baidu?map?api的要求)???
- ????????-->??
- ????????<com.baidu.mapapi.MapView?android:id="@+id/map_View"??
- ????????????android:layout_width="fill_parent"??
- ????????????android:layout_height="fill_parent"??
- ????????????android:clickable="true"??
- ????????????android:visibility="gone"??
- ????????/>??
- ????</LinearLayout>??
- </ScrollView>??
2)继承com.baidu.mapapi.MapActivity的Activity类
??????
- package?com.liufeng.baidumap;??
- ??
- import?android.os.Bundle;??
- import?android.view.View;??
- import?android.view.View.OnClickListener;??
- import?android.widget.Button;??
- import?android.widget.EditText;??
- import?android.widget.TextView;??
- ??
- import?com.baidu.mapapi.BMapManager;??
- import?com.baidu.mapapi.GeoPoint;??
- import?com.baidu.mapapi.MKAddrInfo;??
- import?com.baidu.mapapi.MKDrivingRouteResult;??
- import?com.baidu.mapapi.MKPoiInfo;??
- 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;??
- ??
- /**?
- ?*?根据经纬度查询地址信息?
- ?*??
- [email protected]?
- [email protected]?
- ?*/??
- public?class?QueryAddressActivity?extends?MapActivity?{??
- ????//?定义地图引擎管理类??
- ????private?BMapManager?mapManager;??
- ????//?定义搜索服务类??
- ????private?MKSearch?mMKSearch;??
- ??
- ????private?EditText?longitudeEditText;??
- ????private?EditText?latitudeEditText;??
- ????private?TextView?addressTextView;??
- ????private?Button?queryButton;??
- ??
- ????@Override??
- ????public?void?onCreate(Bundle?savedInstanceState)?{??
- ????????super.onCreate(savedInstanceState);??
- ????????setContentView(R.layout.query_address);??
- ??
- ????????//?初始化MapActivity??
- ????????mapManager?=?new?BMapManager(getApplication());??
- ????????//?init方法的第一个参数需填入申请的API?Key??
- ????????mapManager.init("285B415EBAB2A92293E85502150ADA7F03C777C4",?null);??
- ????????super.initMapActivity(mapManager);??
- ??
- ????????//?初始化MKSearch??
- ????????mMKSearch?=?new?MKSearch();??
- ????????mMKSearch.init(mapManager,?new?MySearchListener());??
- ??
- ????????//?通过id查询在布局文件中定义的控件??
- ????????longitudeEditText?=?(EditText)?findViewById(R.id.longitude_input);??
- ????????latitudeEditText?=?(EditText)?findViewById(R.id.latitude_input);??
- ????????addressTextView?=?(TextView)?findViewById(R.id.address_text);??
- ????????queryButton?=?(Button)?findViewById(R.id.query_button);??
- ??
- ????????//?给地址查询按钮设置单击事件监听器??
- ????????queryButton.setOnClickListener(new?OnClickListener()?{??
- ????????????@Override??
- ????????????public?void?onClick(View?v)?{??
- ????????????????//?用户输入的经度值??
- ????????????????String?longitudeStr?=?longitudeEditText.getText().toString();??
- ????????????????//?用户输入的纬度值??
- ????????????????String?latitudeStr?=?latitudeEditText.getText().toString();??
- ??
- ????????????????try?{??
- ????????????????????//?将用户输入的经纬度值转换成int类型??
- ????????????????????int?longitude?=?(int)?(1000000?*?Double.parseDouble(longitudeStr));??
- ????????????????????int?latitude?=?(int)?(1000000?*?Double.parseDouble(latitudeStr));??
- ??
- ????????????????????//?查询该经纬度值所对应的地址位置信息??
- ????????????????????mMKSearch.reverseGeocode(new?GeoPoint(latitude,?longitude));??
- ????????????????}?catch?(Exception?e)?{??
- ????????????????????addressTextView.setText("查询出错,请检查您输入的经纬度值!");??
- ????????????????}??
- ????????????}??
- ????????});??
- ????}??
- ??
- ????@Override??
- ????protected?boolean?isRouteDisplayed()?{??
- ????????return?false;??
- ????}??
- ??
- ????@Override??
- ????protected?void?onDestroy()?{??
- ????????if?(mapManager?!=?null)?{??
- ????????????//?程序退出前需调用此方法??
- ????????????mapManager.destroy();??
- ????????????mapManager?=?null;??
- ????????}??
- ????????super.onDestroy();??
- ????}??
- ??
- ????@Override??
- ????protected?void?onPause()?{??
- ????????if?(mapManager?!=?null)?{??
- ????????????//?终止百度地图API??
- ????????????mapManager.stop();??
- ????????}??
- ????????super.onPause();??
- ????}??
- ??
- ????@Override??
- ????protected?void?onResume()?{??
- ????????if?(mapManager?!=?null)?{??
- ????????????//?开启百度地图API??
- ????????????mapManager.start();??
- ????????}??
- ????????super.onResume();??
- ????}??
- ??
- ????/**?
- ?????*?内部类实现MKSearchListener接口,用于实现异步搜索服务?
- ?????*??
- [email protected]?
- ?????*/??
- ????public?class?MySearchListener?implements?MKSearchListener?{??
- ????????/**?
- ?????????*?根据经纬度搜索地址信息结果?
- ?????????*??
- [email protected]?
- [email protected](0表示正确返回)?
- ?????????*/??
- ????????@Override??
- ????????public?void?onGetAddrResult(MKAddrInfo?result,?int?iError)?{??
- ????????????if?(result?==?null)?{??
- ????????????????return;??
- ????????????}??
- ????????????StringBuffer?sb?=?new?StringBuffer();??
- ????????????//?经纬度所对应的位置??
- ????????????sb.append(result.strAddr).append("/n");??
- ??
- ????????????//?判断该地址附近是否有POI(Point?of?Interest,即兴趣点)??
- ????????????if?(null?!=?result.poiList)?{??
- ????????????????//?遍历所有的兴趣点信息??
- ????????????????for?(MKPoiInfo?poiInfo?:?result.poiList)?{??
- ????????????????????sb.append("----------------------------------------").append("/n");??
- ????????????????????sb.append("名称:").append(poiInfo.name).append("/n");??
- ????????????????????sb.append("地址:").append(poiInfo.address).append("/n");??
- ????????????????????sb.append("经度:").append(poiInfo.pt.getLongitudeE6()?/?1000000.0f).append("/n");??
- ????????????????????sb.append("纬度:").append(poiInfo.pt.getLatitudeE6()?/?1000000.0f).append("/n");??
- ????????????????????sb.append("电话:").append(poiInfo.phoneNum).append("/n");??
- ????????????????????sb.append("邮编:").append(poiInfo.postCode).append("/n");??
- ????????????????????//?poi类型,0:普通点,1:公交站,2:公交线路,3:地铁站,4:地铁线路??
- ????????????????????sb.append("类型:").append(poiInfo.ePoiType).append("/n");??
- ????????????????}??
- ????????????}??
- ????????????//?将地址信息、兴趣点信息显示在TextView上??
- ????????????addressTextView.setText(sb.toString());??
- ????????}??
- ??
- ????????/**?
- ?????????*?驾车路线搜索结果?
- ?????????*??
- [email protected]?
- [email protected](0表示正确返回)?
- ?????????*/??
- ????????@Override??
- ????????public?void?onGetDrivingRouteResult(MKDrivingRouteResult?result,?int?iError)?{??
- ????????}??
- ??
- ????????/**?
- ?????????*?POI搜索结果(范围检索、城市POI检索、周边检索)?
- ?????????*??
- [email protected]?
- [email protected](11,12,21:poi列表?7:城市列表)?
- [email protected](0表示正确返回)?
- ?????????*/??
- ????????@Override??
- ????????public?void?onGetPoiResult(MKPoiResult?result,?int?type,?int?iError)?{??
- ????????}??
- ??
- ????????/**?
- ?????????*?公交换乘路线搜索结果?
- ?????????*??
- [email protected]?
- [email protected](0表示正确返回)?
- ?????????*/??
- ????????@Override??
- ????????public?void?onGetTransitRouteResult(MKTransitRouteResult?result,?int?iError)?{??
- ????????}??
- ??
- ????????/**?
- ?????????*?步行路线搜索结果?
- ?????????*??
- [email protected]?
- [email protected](0表示正确返回)?
- ?????????*/??
- ????????@Override??
- ????????public?void?onGetWalkingRouteResult(MKWalkingRouteResult?result,?int?iError)?{??
- ????????}??
- ????}??
- }??
3)AndroidManifest.xml中的配置
?????
- <?xml?version="1.0"?encoding="utf-8"?>??
- <manifest?xmlns:android="http://schemas.android.com/apk/res/android"??
- ??????package="com.liufeng.baidumap"??
- ??????android:versionCode="1"??
- ??????android:versionName="1.0">??
- ????<application?android:icon="@drawable/icon"?android:label="@string/app_name">??
- ????????<activity?android:name=".QueryAddressActivity"?android:label="@string/app_name">??
- ????????????<intent-filter>??
- ????????????????<action?android:name="android.intent.action.MAIN"?/>??
- ????????????????<category?android:name="android.intent.category.LAUNCHER"?/>??
- ????????????</intent-filter>??
- ????????</activity>??
- ????</application>??
- ????<uses-sdk?android:minSdkVersion="4"?/>??
- ??
- ????<!--?访问网络的权限?-->??
- ????<uses-permission?android:name="android.permission.INTERNET"?/>??
- ????<!--?访问精确位置的权限?-->??
- ????<uses-permission?android:name="android.permission.ACCESS_FINE_LOCATION"?/>??
- ????<!--?访问网络状态的权限?-->??
- ????<uses-permission?android:name="android.permission.ACCESS_NETWORK_STATE"?/>??
- ????<!--?访问WIFI网络状态的权限?-->??
- ????<uses-permission?android:name="android.permission.ACCESS_WIFI_STATE"?/>??
- ????<!--?改变WIFI网络状态的权限?-->??
- ????<uses-permission?android:name="android.permission.CHANGE_WIFI_STATE"?/>??
- ????<!--?读写存储卡的权限?-->??
- ????<uses-permission?android:name="android.permission.WRITE_EXTERNAL_STORAGE"?/>??
- ????<!--?读取电话状态的权限?-->??
- ????<uses-permission?android:name="android.permission.READ_PHONE_STATE"?/>??
- </manifest>???
4)运行结果截图及说明
??????
程序在模拟器上运行的初始效果如上图所示。可以看出,地图并没有显示出来,这和我们在设计时布局时所设想的一样;另外两个输入框中也分别显示了默认给出的经纬度值。
????? 点击“地址查询”按钮后,将看到如下图所示包含了查询结果的界面:
??????
说明:图上的“贵州省贵阳市云岩区普陀路”正是我们要查询的地理坐标(经度:106.720397,纬度:26.597239)所对应的地址信息;同时该地址信息下方还显示出了该地址附近的10个兴趣点(POI),每个兴趣点分别包含了“名称”、“地址”、“经纬度”、“电话”、“邮编”和“兴趣点类型”信息。
?
备注:如果本文的示例继续做下去,就应该将MapView显示出来,同时结合第8篇文章“[008] 百度地图API之ItemizedOverlay的使用(Android)”所介绍的内容将地址信息和兴趣点标注在地图上。我想这两方面的内容都已做过详细讲解并给出了示例,再来实现这个应该并不是什么难事,看文章的你就动动手来完成它吧!