android GSM+CDMA基站定位
在googleAPI里提供了基站信息的获取类TelephonyManager，通过其方法getCellLocation得到CellLocation即可获取到基站相关信息
但CellLocation是个抽象类，所以在具体使用时需要判断接入的网络制式来用其子类CdmaCellLocation或GsmCellLocation 来强转
CdmaCellLocation对应CDMA网，GsmCellLocation对应GSM网
三大网络运营商的网络制式对应如下：
移动2G 网 --> GSM
移动3G 网 --> TD-SCDMA
电信2G 网 --> CDMA
电信3G 网 --> CDMA2000
联通2G 网 --> GSM
联通3G 网 --> WCDMA
由此可见移动，联通2G 网都可使用GsmCellLocation
电信2G,3G网则使用CdmaCellLocation
那么移动3G和联通3G又当如何
其实经本人亲测，移动3G网也可使用GsmCellLocation，听说是TD-SCDMA衍生于GSM，具体原因咱也不用纠结了，反正能用就是了
而联通的WCDMA据说也可使用GsmCellLocation，那姑且就是这样吧，有条件的童鞋试一试吧。
对于网络制式的判断调用TelephonyManager.getNetworkType()可有多种情况，如下：
NETWORK_TYPE_UNKNOWNNETWORK_TYPE_GPRSNETWORK_TYPE_EDGENETWORK_TYPE_UMTSNETWORK_TYPE_HSDPANETWORK_TYPE_HSUPANETWORK_TYPE_HSPANETWORK_TYPE_CDMANETWORK_TYPE_EVDO_0NETWORK_TYPE_EVDO_ANETWORK_TYPE_EVDO_BNETWORK_TYPE_1xRTTNETWORK_TYPE_IDENNETWORK_TYPE_LTENETWORK_TYPE_EHRPD
通过对网络类型判断后获取对应基站信息代码片段如下:
public static ArrayList<CellIDInfo> getCellIDInfo(Context context) throws Exception{
TelephonyManager manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
ArrayList<CellIDInfo> CellID = new ArrayList<CellIDInfo>();
CellIDInfo currentCell = new CellIDInfo();
int type = manager.getNetworkType();
Log.d(TAG, "getCellIDInfo--> NetworkType = " + type);
int phoneType = manager.getPhoneType();
Log.d(TAG, "getCellIDInfo--> phoneType = " + phoneType);
if (type == TelephonyManager.NETWORK_TYPE_GPRS // GSM网
|| type == TelephonyManager.NETWORK_TYPE_EDGE
|| type == TelephonyManager.NETWORK_TYPE_HSDPA)
{
GsmCellLocation gsm = ((GsmCellLocation) manager.getCellLocation());
if (gsm == null)
{
Log.e(TAG, "GsmCellLocation is null!!!");
return null;
}
int lac = gsm.getLac();
String mcc = manager.getNetworkOperator().substring(0, 3);
String mnc = manager.getNetworkOperator().substring(3, 5);
int cid = gsm.getCid();
currentCell.cellId = gsm.getCid();
currentCell.mobileCountryCode = mcc;
currentCell.mobileNetworkCode = mnc;
currentCell.locationAreaCode = lac;
currentCell.radioType = "gsm";
CellID.add(currentCell);
// 获得邻近基站信息
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.mobileNetworkCode = mnc;
info.locationAreaCode = lac;
CellID.add(info);
}
}else if (type == TelephonyManager.NETWORK_TYPE_CDMA // 电信cdma网
|| type == TelephonyManager.NETWORK_TYPE_1xRTT
|| type == TelephonyManager.NETWORK_TYPE_EVDO_0
|| type == TelephonyManager.NETWORK_TYPE_EVDO_A)
{
CdmaCellLocation cdma = (CdmaCellLocation) manager.getCellLocation();
if (cdma == null)
{
Log.e(TAG, "CdmaCellLocation is null!!!");
return null;
}
int lac = cdma.getNetworkId();
String mcc = manager.getNetworkOperator().substring(0, 3);
String mnc = String.valueOf(cdma.getSystemId());
int cid = cdma.getBaseStationId();
currentCell.cellId = cid;
currentCell.mobileCountryCode = mcc;
currentCell.mobileNetworkCode = mnc;
currentCell.locationAreaCode = lac;
currentCell.radioType = "cdma";
CellID.add(currentCell);
// 获得邻近基站信息
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.mobileNetworkCode = mnc;
info.locationAreaCode = lac;
CellID.add(info);
}
}
return CellID;
}
从GOOGLE的API文档里总共有14钟网络类型，这里只罗列了其中7种，其他的主要是本人也不太清楚其对应到的网络制式是怎样的
所以部分童鞋的SIM卡网络制式不在这7种之内，自己根据实际情况看看它是归类于GSM还是CDMA在添进去就可以了
网络上多数教程是讲GSM网获取基站的，而忽略了C网的基站
这里我们可以比较一下GSM 和 CDMA 在获取基站信息时的不同之处
GSM:
int lac = gsm.getLac();
String mcc = manager.getNetworkOperator().substring(0, 3);
String mnc = manager.getNetworkOperator().substring(3, 5);
int cid = gsm.getCid();
CDMA:
int lac = cdma.getNetworkId();
String mcc = manager.getNetworkOperator().substring(0, 3);
String mnc = String.valueOf(cdma.getSystemId());
int cid = cdma.getBaseStationId();
在获取区域码LAC时GSM使用的是GsmCellLocation.getLac(),CDMA则用CdmaCellLocation.getNetworkId()来代替
在获取基站ID时GSM使用的是GsmCellLocation.getCid(),CDMA则用CdmaCellLocation.getBaseStationId()来代替
前面获取到的都是单个基站的信息，后面再获取周围邻近基站信息以辅助通过基站定位的精准性
TelephonyManager.getNeighboringCellInfo()，将其也放入基站信息LIST表中
最后通过google提供的gear接口获取经纬度，代码如下：
public static Location callGear(List<CellIDInfo> cellID) {
if (cellID == null || cellID.size() == 0)
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("location_area_code", cellID.get(0).locationAreaCode);
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);
current_data.put("signal_strength", -60);
current_data.put("timing_advance", 5555);
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(i).locationAreaCode);
data.put("mobile_country_code", cellID.get(i).mobileCountryCode);
data.put("mobile_network_code", cellID.get(i).mobileNetworkCode);
data.put("age", 0);
array.put(data);
}
}
holder.put("cell_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( System.currentTimeMillis());//AppUtil.getUTCTime());
return loc;
} catch (JSONException e) {
e.printStackTrace();
return null;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
大家注意看这行holder.put("radio_type", cellID.get(0).radioType);
GSM就用"gsm",CDMA就用"cdma"
这个千万别搞混了，不然就获取不到信息了
值得一提的是C网获取基站再定位那偏差不是一般的大，是恨大，将近1千米了，大概是C网基站较少的缘故吧
最后通过经纬度获取地理位置信息，代码如下：
public static String getAddress(Location itude) throws Exception {
String resultString = "";
/** 这里采用get方法，直接将参数加到URL上 */
String urlString = String.format("http://maps.google.cn/maps/geo?key=abcdefg&q=%s,%s", itude.getLatitude(), itude.getLongitude());
Log.i("URL", urlString);
/** 新建HttpClient */
HttpClient client = new DefaultHttpClient();
/** 采用GET方法 */
HttpGet get = new HttpGet(urlString);
try {
/** 发起GET请求并获得返回数据 */
HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
BufferedReader buffReader = new BufferedReader(new InputStreamReader(entity.getContent()));
StringBuffer strBuff = new StringBuffer();
String result = null;
while ((result = buffReader.readLine()) != null) {
strBuff.append(result);
}
resultString = strBuff.toString();
Log.e("resultAdress--->", resultString);
/** 解析JSON数据，获得物理地址 */
if (resultString != null && resultString.length() > 0) {
JSONObject jsonobject = new JSONObject(resultString);
JSONArray jsonArray = new JSONArray(jsonobject.get("Placemark").toString());
resultString = "";
for (int i = 0; i < jsonArray.length(); i++) {
resultString = jsonArray.getJSONObject(i).getString("address");
}
}
} catch (Exception e) {
throw new Exception("获取物理位置出现错误:" + e.getMessage());
} finally {
get.abort();
client = null;
}
return resultString;
}
在获取地理位置的这个location事实上应该传入纠偏后的location，本文暂不做此处理，所以得到的地理信息位置是偶偏差的，大家注意
最后附上截图：
工程下载链接：http://download.csdn.net/detail/geniuseoe2012/4340303