android 基站和Wifi定位

转载：

android可以借助于gps实现定位，但是很多地方是使用gps无法定位比如在室内，而且gps定位的话速度慢

那么如何克服这样的缺点使得应用程序在室内也可以定位呢？办法是有的借助于基站和wifi进行定位。具体的细节可参考：
http://code.google.com/intl/zh-CN/apis/gears/geolocation_network_protocol.html

 

下面的代码实现了定位的大致功能
    CellIDInfo.java 封装了cellid的信息

    public class CellIDInfo {  
          
        public int cellId;  
        public String mobileCountryCode;  
        public String mobileNetworkCode;  
        public int locationAreaCode;  
        public String radioType;  
          
        public CellIDInfo(){}  
    }  

 

WifiInfo.java 封装了wifi的信息

 

    public class WifiInfo {  
          
        public String mac;  
          
        public WifiInfo(){}  
    }  

 

 

CellIDInfoManager.java 可获取所有的CellIDInfo

 

    import java.util.ArrayList;  
    import java.util.List;  
    import android.content.Context;  
    import android.telephony.NeighboringCellInfo;  
    import android.telephony.PhoneStateListener;  
    import android.telephony.TelephonyManager;  
    import android.telephony.cdma.CdmaCellLocation;  
    import android.telephony.gsm.GsmCellLocation;  
    public class CellIDInfoManager {  
        private TelephonyManager manager;  
        private PhoneStateListener listener;  
        private GsmCellLocation gsm;  
        private CdmaCellLocation cdma;  
        int lac;  
        String current_ci,mcc, mnc;  
          
        public CellIDInfoManager(){}  
          
        public ArrayList<CellIDInfo> getCellIDInfo(Context context){  
            manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);  
            listener = new PhoneStateListener();  
            manager.listen(listener, 0);  
            ArrayList<CellIDInfo> CellID = new ArrayList<CellIDInfo>();  
            CellIDInfo currentCell = new CellIDInfo();  
              
            int type = manager.getNetworkType();  
            if (type == TelephonyManager.NETWORK_TYPE_GPRS || type ==TelephonyManager.NETWORK_TYPE_EDGE  
                    || type ==TelephonyManager.NETWORK_TYPE_HSDPA) {  
                gsm = ((GsmCellLocation) manager.getCellLocation());  
                if (gsm == null) return null;  
                lac  = gsm.getLac();  
                mcc = manager.getNetworkOperator().substring(0, 3);  
                mnc = manager.getNetworkOperator().substring(3, 5);  
                  
                currentCell.cellId = gsm.getCid();  
                currentCell.mobileCountryCode = mcc;  
                currentCell.mobileNetworkCode = mnc;  
                currentCell.locationAreaCode = lac;  
                currentCell.radioType = "gsm";  
                CellID.add(currentCell);  
                  
                List<NeighboringCellInfo> list = manager.getNeighboringCellInfo();  
                int size = list.size();  
                for (int i = 0; i < size; i++) {  
                    CellIDInfo info = new CellIDInfo();  
                    info.cellId = list.get(i).getCid();  
                    info.mobileCountryCode = mcc;  
                    info.mobileCountryCode = mnc;  
                    info.locationAreaCode = lac;  
                    CellID.add(info);  
                }  
                return CellID;  
                  
            } else if (type == TelephonyManager.NETWORK_TYPE_CDMA || type ==TelephonyManager.NETWORK_TYPE_1xRTT) {  
                cdma = ((CdmaCellLocation) manager.getCellLocation());  
                if (cdma == null) return null;  
                  
                if ("460".equals(manager.getSimOperator().substring(0, 3)))   
                    return null;  
            }  
            return null;  
        }  
    }  

 

WifiInfoManager.java 可获取wifi的信息，目前我只取了当前连接的wifi，没有获取所有能扫描到的wifi信息。

 

    import java.util.ArrayList;  
    import android.content.Context;  
    import android.net.wifi.WifiManager;  
    public class WifiInfoManager {  
          
        WifiManager wm;  
          
        public WifiInfoManager(){}  
          
        public ArrayList getWifiInfo(Context context){  
            ArrayList<WifiInfo> wifi = new ArrayList();  
            wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);  
            WifiInfo info = new WifiInfo();  
            info.mac = wm.getConnectionInfo().getBSSID();  
            wifi.add(info);  
            return wifi;  
        }  
    }  

 

调用google gears的方法，该方法调用gears来获取经纬度

 

    private Location callGear(ArrayList<WifiInfo> wifi,  
                ArrayList<CellIDInfo> cellID) {  
              
            if (cellID == null) return null;  
              
            DefaultHttpClient client = new DefaultHttpClient();  
            HttpPost post = new HttpPost(  
                    "http://www.google.com/loc/json");  
            JSONObject holder = new JSONObject();  
            try {  
                holder.put("version", "1.1.0");  
                holder.put("host", "maps.google.com");  
                holder.put("home_mobile_country_code", cellID.get(0).mobileCountryCode);  
                holder.put("home_mobile_network_code", cellID.get(0).mobileNetworkCode);  
                holder.put("radio_type", cellID.get(0).radioType);  
                holder.put("request_address", true);  
                if ("460".equals(cellID.get(0).mobileCountryCode))   
                    holder.put("address_language", "zh_CN");  
                else  
                    holder.put("address_language", "en_US");  
                  
                JSONObject data,current_data;  
                JSONArray array = new JSONArray();  
                  
                current_data = new JSONObject();  
                current_data.put("cell_id", cellID.get(0).cellId);  
                current_data.put("mobile_country_code", cellID.get(0).mobileCountryCode);  
                current_data.put("mobile_network_code", cellID.get(0).mobileNetworkCode);  
                current_data.put("age", 0);  
                array.put(current_data);  
                  
                if (cellID.size() > 2) {  
                    for (int i = 1; i < cellID.size(); i++) {  
                        data = new JSONObject();  
                        data.put("cell_id", cellID.get(i).cellId);  
                        data.put("location_area_code", cellID.get(0).locationAreaCode);  
                        data.put("mobile_country_code", cellID.get(0).mobileCountryCode);  
                        data.put("mobile_network_code", cellID.get(0).mobileNetworkCode);  
                        data.put("age", 0);  
                        array.put(data);  
                    }  
                }  
                holder.put("cell_towers", array);  
                  
                if (wifi.get(0).mac != null) {  
                    data = new JSONObject();  
                    data.put("mac_address", wifi.get(0).mac);  
                    data.put("signal_strength", 8);  
                    data.put("age", 0);  
                    array = new JSONArray();  
                    array.put(data);  
                    holder.put("wifi_towers", array);  
                }  
                  
                StringEntity se = new StringEntity(holder.toString());  
                Log.e("Location send", holder.toString());  
                post.setEntity(se);  
                HttpResponse resp = client.execute(post);  
                HttpEntity entity = resp.getEntity();  
                BufferedReader br = new BufferedReader(  
                        new InputStreamReader(entity.getContent()));  
                StringBuffer sb = new StringBuffer();  
                String result = br.readLine();  
                while (result != null) {  
                    Log.e("Locaiton reseive", result);  
                    sb.append(result);  
                    result = br.readLine();  
                }  
                data = new JSONObject(sb.toString());  
                data = (JSONObject) data.get("location");  
                Location loc = new Location(LocationManager.NETWORK_PROVIDER);  
                loc.setLatitude((Double) data.get("latitude"));  
                loc.setLongitude((Double) data.get("longitude"));  
                loc.setAccuracy(Float.parseFloat(data.get("accuracy").toString()));  
                loc.setTime(AppUtil.getUTCTime());  
                return loc;  
            } catch (JSONException e) {  
                return null;  
            } catch (UnsupportedEncodingException e) {  
                e.printStackTrace();  
            } catch (ClientProtocolException e) {  
                e.printStackTrace();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
            return null;  
        }  

 

 

注备：由于看到这篇文章极好，所以转载过来。

评论

1 楼 xgfdxj 2012-07-09  

MARK