百度定位的简单封装

来源：互联网发布：js中的splice方法参数编辑：程序博客网时间：2024/04/29 12:05
步骤一:将第三方的功能集成到app当中(集成方式并非重点因此不做赘述).
步骤二:创建一个LocationService 类,将定位的结果通过handler的方式异步将数据传输出去.
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String city = location.getCity();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("\",");json.append("\"city\":\"").append(city).append("\"}");Message msg = handler.obtainMessage();msg.what = DATA;msg.obj = json.toString();Log.d(TAG, "定位结果 => " + json.toString());handler.sendMessage(msg);}               }            }         }public 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;}}
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