百度地图定位的工具类

public class BaiduMapLocationHelper {
    private static BaiduMapLocationHelper mInstance;
    private Context mContext;
    private LocationClient mLocationClient = null;
    private OnLocationCallBack mLocationCallBack;

    private BaiduMapLocationHelper() {
    }

    public static synchronized BaiduMapLocationHelper getInstance() {
        if (mInstance == null) {
            mInstance = new BaiduMapLocationHelper();
        }
        return mInstance;
    }

    public BaiduMapLocationHelper init(Context context) {
        mContext = context;
        BDLocationListener myListener = new MyLocationListener();
        mLocationClient = new LocationClient(context);     //声明LocationClient类
        initLocation();
        mLocationClient.registerLocationListener(myListener);    //注册监听函数
        return this;
    }

    public void setLocationCallBack(OnLocationCallBack callBack) {
        mLocationCallBack = callBack;
    }

    /**
     * 开始启动定位
     */
    public void locationStart() {
        initLocation();
        mLocationClient.start();
    }

    private void initLocation() {
        LocationClientOption option = new LocationClientOption();
        option.setLocationMode(LocationClientOption.LocationMode.Hight_Accuracy);//可选，默认高精度，设置定位模式，高精度，低功耗，仅设备
        option.setCoorType("bd09ll");//可选，默认gcj02，设置返回的定位结果坐标系
        int span = 1000;
        option.setScanSpan(span);//可选，默认0，即仅定位一次，设置发起定位请求的间隔需要大于等于1000ms才是有效的
        option.setIsNeedAddress(true);//可选，设置是否需要地址信息，默认不需要
        option.setOpenGps(true);//可选，默认false,设置是否使用gps
        option.setLocationNotify(true);//可选，默认false，设置是否当GPS有效时按照1S/1次频率输出GPS结果
        option.setIsNeedLocationDescribe(true);//可选，默认false，设置是否需要位置语义化结果，可以在BDLocation.getLocationDescribe里得到，结果类似于“在北京天安门附近”
        option.setIsNeedLocationPoiList(true);//可选，默认false，设置是否需要POI结果，可以在BDLocation.getPoiList里得到
        option.setIgnoreKillProcess(false);//可选，默认true，定位SDK内部是一个SERVICE，并放到了独立进程，设置是否在stop的时候杀死这个进程，默认不杀死
        option.SetIgnoreCacheException(false);//可选，默认false，设置是否收集CRASH信息，默认收集
        option.setEnableSimulateGps(true);//可选，默认false，设置是否需要过滤GPS仿真结果，默认需要
        mLocationClient.setLocOption(option);
    }

    private class MyLocationListener implements BDLocationListener {

        @Override
        public void onReceiveLocation(BDLocation location) {

            if (mLocationCallBack != null) {
                //LatLng(double latitude, double longitude)
//                LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
                mLocationCallBack.callBackLatLng(location);
            }

            //Receive Location
            StringBuilder sb = new StringBuilder(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) {// GPS定位结果
                sb.append("\nspeed : ");
                sb.append(location.getSpeed());// 单位：公里每小时
                sb.append("\nsatellite : ");
                sb.append(location.getSatelliteNumber());
                sb.append("\nheight : ");
                sb.append(location.getAltitude());// 单位：米
                sb.append("\ndirection : ");
                sb.append(location.getDirection());// 单位度
                sb.append("\naddr : ");
                sb.append(location.getAddrStr());
                sb.append("\ndescribe : ");
                sb.append("gps定位成功");

            } else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {// 网络定位结果
                sb.append("\naddr : ");
                sb.append(location.getAddrStr());
                //运营商信息
                sb.append("\noperationers : ");
                sb.append(location.getOperators());
                sb.append("\ndescribe : ");
                sb.append("网络定位成功");
            } else if (location.getLocType() == BDLocation.TypeOffLineLocation) {// 离线定位结果
                sb.append("\ndescribe : ");
                sb.append("离线定位成功，离线定位结果也是有效的");
            } else if (location.getLocType() == BDLocation.TypeServerError) {
                sb.append("\ndescribe : ");
                sb.append("服务端网络定位失败，可以反馈IMEI号和大体定位时间到loc-bugs@baidu.com，会有人追查原因");
            } else if (location.getLocType() == BDLocation.TypeNetWorkException) {
                sb.append("\ndescribe : ");
                sb.append("网络不同导致定位失败，请检查网络是否通畅");
            } else if (location.getLocType() == BDLocation.TypeCriteriaException) {
                sb.append("\ndescribe : ");
                sb.append("无法获取有效定位依据导致定位失败，一般是由于手机的原因，处于飞行模式下一般会造成这种结果，可以试着重启手机");
            }
            sb.append("\nlocationdescribe : ");
            sb.append(location.getLocationDescribe());// 位置语义化信息

            List
 
   list = location.getPoiList();// POI数据
            if (list != null) {
                sb.append("\npoilist size = : ");
                sb.append(list.size());
                for (Poi p : list) {
                    sb.append("\npoi= : ");
                    sb.append(p.getId()).append(" ").append(p.getName()).append(" ").append(p.getRank());
                }
            }
            Log.i("BaiduLocationApiDem", sb.toString());
        }


    }


    public interface OnLocationCallBack {
        void callBackLatLng(BDLocation location);
    }
}