通过gps,wifi,基站定位获取当前位置(转）

private Location getCurrentLocationGPS() {
        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
        criteria.setAltitudeRequired(false);
        criteria.setBearingRequired(false);
        criteria.setCostAllowed(true);
        criteria.setPowerRequirement(Criteria.POWER_LOW);
        String locationProvider = locationManager.getBestProvider(criteria,
                true);

        Location location = locationManager
                .getLastKnownLocation(locationProvider);

        return location;
    }

    // 根据wifi获取当前位置
    private Location getCurrentLocationWifi(Context context) {
        Location location=null;
        LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        try
        {
            WifiManager wifiManager=(WifiManager)context.getSystemService(Context.WIFI_SERVICE);
            if(wifiManager.isWifiEnabled())
            {
             location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            }
        }
        catch(Exception e)
        {
        }
       
       
       
        return location;
    }

    // 根据基站获取当前的位置
    private Location getCurrentLocationAGPS() {
        Location location = null;

        if (telephonyManager.getCellLocation() == null) {

        }
        GsmCellLocation gcl = (GsmCellLocation) telephonyManager
                .getCellLocation();

        int cid = gcl.getCid();

        int lac = gcl.getLac();

        int mcc = Integer.valueOf(telephonyManager.getNetworkOperator()
                .substring(0,

                3));

        int mnc = Integer.valueOf(telephonyManager.getNetworkOperator()
                .substring(3,

                5));

        try {

            // 组装JSON查询字符串

            JSONObject holder = new JSONObject();

            holder.put("version", "1.1.0");

            holder.put("host", "maps.google.com");

            // holder.put("address_language", "zh_CN");

            holder.put("request_address", true);

            JSONArray array = new JSONArray();

            JSONObject data = new JSONObject();
            data.put("cell_id", cid); // 25070
            data.put("location_area_code", lac);// 4474
            data.put("mobile_country_code", mcc);// 460

            data.put("mobile_network_code", mnc);// 0
            array.put(data);

            holder.put("cell_towers", array);

            // 创建连接，发送请求并接受回应

            DefaultHttpClient client = new DefaultHttpClient();
            HttpPost post = new HttpPost("http://www.google.com/loc/json");

            StringEntity se = new StringEntity(holder.toString());

            post.setEntity(se);

            HttpResponse resp = client.execute(post);

            HttpEntity entity = resp.getEntity();

            BufferedReader br = new BufferedReader(

            new InputStreamReader(entity.getContent()));

            StringBuffer resultStr = new StringBuffer();

            String readLine = null;

            while ((readLine = br.readLine()) != null) {

                resultStr.append(readLine);

            }

            JSONObject jsonResult = new JSONObject(resultStr.toString());
            JSONObject jsonLocation = jsonResult.getJSONObject("location");
            double jsonLat = jsonLocation.getDouble("latitude");
            double jsonLon = jsonLocation.getDouble("longitude");

            location = new Location("AGPS");
            location.setLatitude(jsonLat);
            location.setLongitude(jsonLon);

        } catch (Exception e) {

            // TODO: handle exception

        }

        return location;
    }

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