为android封装的百度定位组件

package com.android.location;import java.math.BigDecimal;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import org.json.JSONObject;import android.content.Context;import android.os.Handler;import android.os.Message;import android.util.Log;import com.baidu.location.BDLocation;import com.baidu.location.BDLocationListener;import com.baidu.location.LocationClient;import com.baidu.location.LocationClientOption;/** * 利用百度地图定位 *  * @author Esa */public class LocationService {private String TAG = "Location";public static final int DATA = 6;private LocationClient client;private LocationClientOption option;private Handler handler;/** * 构造函数 */public LocationService(Context context) {client = new LocationClient(context);// 实例化定位类client.registerLocationListener(new BDLocationListener() {@Overridepublic void onReceiveLocation(BDLocation location) {if (location != null) {int locType = location.getLocType();// 获取定位类型，161网络定位 61GPS定位Log.w(TAG, "Location type = " + locType);if (locType == BDLocation.TypeNetWorkLocation || locType == BDLocation.TypeGpsLocation) {double latitude = location.getLatitude();// 返回维度double longitude = location.getLongitude();// 返回经度String address = location.getAddrStr();// 返回地理信息float radius = -1;if (location.hasRadius()) {radius = location.getRadius();// 获取定位精度半径，单位是米BigDecimal b = new BigDecimal(radius);radius = b.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue();}if (handler != null) {StringBuffer json = new StringBuffer();json.append("{\"locType\":\"").append(locType == BDLocation.TypeNetWorkLocation ? "网络定位" : "GPS定位").append("\",");json.append("\"latitude\":\"").append(latitude).append("\",");json.append("\"longitude\":\"").append(longitude).append("\",");json.append("\"radius\":\"").append(radius).append("\",");json.append("\"address\":\"").append(address).append("\"}");Message msg = handler.obtainMessage();msg.what = DATA;msg.obj = json.toString();Log.d(TAG, "定位结果 => " + json.toString());handler.sendMessage(msg);}}}}@Overridepublic void onReceivePoi(BDLocation location) {}});// 设置监听option = new LocationClientOption();// 实例化定位参数option.setAddrType("all");// 设置返回地理信息option.setOpenGps(true);// option.setPriority(LocationClientOption.GpsFirst);option.setCoorType("bd09ll");// 设置为百度坐标系option.disableCache(true);// 不使用缓存option.setScanSpan(1000 * 3);// 定位间隔client.setLocOption(option);// 设置参数}/** * 通过经纬度获取地理信息 *  * @param latitude * @param longitude * @return */public synchronized String getAddress(String latitude, String longitude) {HttpClient client = new DefaultHttpClient();HttpGet get = new HttpGet(String.format("http://api.map.baidu.com/geocoder/v2/?ak=%s&location=%s,%s&output=%s&pois=%s", "C2ab471c7883b11890e509c2abb27b56", latitude, longitude, "json", "0"));try {HttpResponse response = client.execute(get);if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {return null;}HttpEntity entity = response.getEntity();if (entity != null) {String json = EntityUtils.toString(entity, "UTF-8");JSONObject object = new JSONObject(json);int status = object.getInt("status");if (status == 0) {String address = object.getJSONObject("result").getString("formatted_address");if (address != null && !"".equals(address.trim())) {return address;}}}} catch (Exception e) {Log.e(TAG, "", e);}return null;}/** * 启动定位 *  * @param handler *            接收的handler */public void start(Handler handler) {this.handler = handler;this.start();}/** * 开启定位 */private void start() {if (client.isStarted()) {Log.w(TAG, "定位服务 正在运行");} else {Log.d(TAG, "开启定位");client.start();}}/** * 是否正在定位 *  * @return */public boolean isStarted() {return client.isStarted();}/** * 停止定位 */public void stop() {Log.d(TAG, "定位服务 关闭");client.stop();handler = null;}}
LocationServiceservice=newLocationService(Context);
service.start(Handler);
更多相关文章

随机推荐
