Android获取基站信息

package cn.police.bz.util;

import android.content.Context;
import android.telephony.CellLocation;
import android.telephony.TelephonyManager;
import android.telephony.cdma.CdmaCellLocation;
import android.telephony.gsm.GsmCellLocation;

public class BaseStationInfoHelper {

    public static class BaseStationInfo {
        /** 国家 */
        public int mcc = -1;
        /** 运营商 */
        public int mnc = -1;
        /** 基站编号 */
        public int lac = -1;
        /** 小区编号 */
        public int cid = -1;
    }

    public static BaseStationInfo getSimCardInfo(Context context) {
        final TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);

        BaseStationInfo res = new BaseStationInfo();

        CellLocation clll = telephony.getCellLocation();
        if (clll == null) {
            return res;
        }

        if (clll instanceof GsmCellLocation) {
            GsmCellLocation gsm = (GsmCellLocation) clll;
            int lac = gsm.getLac();
            String mcc = telephony.getNetworkOperator().substring(0, 3);
            String mnc = telephony.getNetworkOperator().substring(3);

            res.cid = gsm.getCid();
            res.mcc = Integer.parseInt(mcc);
            res.mnc = Integer.parseInt(mnc);
            res.lac = lac;
        } else if (clll instanceof CdmaCellLocation) {
            CdmaCellLocation cdma = (CdmaCellLocation) clll;
            int lac = cdma.getNetworkId();
            String mcc = telephony.getNetworkOperator().substring(0, 3);
            String mnc = telephony.getNetworkOperator().substring(3);
            int cid = cdma.getBaseStationId();
            res.cid = cid;
            res.mcc = Integer.parseInt(mcc);
            res.mnc = Integer.parseInt(mnc);
            res.lac = lac;
        }

        return res;
    }

}

 有一个问题就是三星部分手机获取不到,telephony.getCellLocation()返回的是null,具体不知道为什么;有知道原因或者解决办法的麻烦告知;