百度Android 定位SDK示例

LBS（Location Based Service）是互联网时代的热点，在本地搜索、定向广告、社交网络等众多领域得到了广泛应用。其核心基础，就是定位能力，为各类应用提供位置信息。百度移动定位API是一个提供基础定位API的第三方平台，为各类应用提供定位能力，提升用户体验。
百度地图定位SDK免费对外开放，无需申请key。

百度地图定位SDK目前只支持Android和Symbian两大平台，其他平台产品正在计划开发中。

定位SDK可以从 百度地图api官网 下载，具体文档可以参考官方文档，这里不详述。

示例代码

MyApp.java

package com.yulore.baidupoi;import android.app.Application;import android.util.Log;import android.widget.TextView;import com.baidu.location.BDLocation;import com.baidu.location.BDLocationListener;import com.baidu.location.LocationClient;public class MyApp extends Application {public static final String TAG = "MyApp";public LocationClient mLocationClient;public TextView tv_result;public MyLocationListenner myListener = new MyLocationListenner();@Overridepublic void onCreate() {mLocationClient = new LocationClient(this);mLocationClient.registerLocationListener(myListener);}/** * 监听函数，又新位置的时候，格式化成字符串，输出到屏幕中 */public class MyLocationListenner implements BDLocationListener {@Overridepublic void onReceiveLocation(BDLocation location) {if (location == null)return ;StringBuffer sb = new StringBuffer(256);sb.append("time : ");sb.append(location.getTime());sb.append("\nerror code : ");sb.append(location.getLocType());sb.append("\nlatitude : ");sb.append(location.getLatitude());sb.append("\nlontitude : ");sb.append(location.getLongitude());sb.append("\nradius : ");sb.append(location.getRadius());if (location.getLocType() == BDLocation.TypeGpsLocation){sb.append("\nspeed : ");sb.append(location.getSpeed());sb.append("\nsatellite : ");sb.append(location.getSatelliteNumber());} else if (location.getLocType() == BDLocation.TypeNetWorkLocation){sb.append("\n省：");sb.append(location.getProvince());sb.append("\n市：");sb.append(location.getCity());sb.append("\n区/县：");sb.append(location.getDistrict());sb.append("\naddr : ");sb.append(location.getAddrStr());}sb.append("\nsdk version : ");sb.append(mLocationClient.getVersion());sb.append("\nisCellChangeFlag : ");sb.append(location.isCellChangeFlag());setAddress(sb.toString());Log.e(TAG, sb.toString());}@Overridepublic void onReceivePoi(BDLocation poiLocation) {if (poiLocation == null){return ; }StringBuffer sb = new StringBuffer(256);sb.append("Poi time : ");sb.append(poiLocation.getTime());sb.append("\nerror code : "); sb.append(poiLocation.getLocType());sb.append("\nlatitude : ");sb.append(poiLocation.getLatitude());sb.append("\nlontitude : ");sb.append(poiLocation.getLongitude());sb.append("\nradius : ");sb.append(poiLocation.getRadius());if (poiLocation.getLocType() == BDLocation.TypeNetWorkLocation){sb.append("\naddr : ");sb.append(poiLocation.getAddrStr());} if(poiLocation.hasPoi()){sb.append("\nPoi:");sb.append(poiLocation.getPoi());}else{sb.append("noPoi information");}setAddress(sb.toString());Log.e(TAG, sb.toString());}}private void setAddress(String text) {if(text!=null){if(tv_result!=null){tv_result.setText(text);}}}}

MainActivity.java

package com.yulore.baidupoi;import com.baidu.location.LocationClient;import com.baidu.location.LocationClientOption;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity implements OnClickListener {private Button bt_poi;private Button bt_start;private TextView tv_result;private boolean isStart;private LocationClient mLocationClient;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);findViewById();mLocationClient = ((MyApp) getApplication()).mLocationClient;((MyApp) getApplication()).tv_result = tv_result;setListener();}private void findViewById() {bt_poi = (Button) findViewById(R.id.bt_poi);bt_start = (Button) findViewById(R.id.bt_start);tv_result = (TextView) findViewById(R.id.tv_result);}private void setListener() {bt_start.setOnClickListener(this);bt_poi.setOnClickListener(this);}private void setLocationOption() {LocationClientOption option = new LocationClientOption();option.setOpenGps(false); // 设置是否打开gps，使用gps前提是用户硬件打开gps。默认是不打开gps的option.setCoorType("bd09ll"); // 设置返回值的坐标类型option.setServiceName("com.baidu.location.service_v2.9");option.setAddrType("all");// 设置是否要返回地址信息，默认为无地址信息option.setScanSpan(3000);// 设置定时定位的时间间隔。单位msoption.setPriority(LocationClientOption.NetWorkFirst); // 设置网络优先//option.setPoiNumber(10); // 设置最多可返回的POI个数，默认值为3//option.setPoiExtraInfo(false); // 设置是否需要POI的电话地址等详细信息：//option.setPoiDistance(500);//设置查询范围，默认值为500，即以当前定位位置为中心的半径大小option.disableCache(true); // 设置是否启用缓存定位.true表示禁用缓存定位，false表示启用缓存定位。mLocationClient.setLocOption(option);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.bt_start:if(!isStart){setLocationOption();mLocationClient.start();bt_start.setText("停止");isStart = true;}else{mLocationClient.stop();bt_start.setText("开始");isStart = false;}break;case R.id.bt_poi:if(mLocationClient!=null && mLocationClient.isStarted()){setLocationOption();mLocationClient.requestLocation();}break;default:break;}}@Overrideprotected void onStop() {mLocationClient.stop();super.onStop();}}

布局文件main.xml

<?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" >    <TextView        android:id="@+id/tv_result"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" />        <Button        android:id="@+id/bt_start"        android:layout_width="100dip"        android:layout_height="50dip"        android:text="@string/start_loc" >    </Button>    <Button        android:id="@+id/bt_poi"        android:layout_width="100dip"        android:layout_height="wrap_content"        android:text="@string/loc" >    </Button></LinearLayout>

运行结果