Android 判斷用戶2G/3G/4G移動數據網絡

jopen 10年前發布 | 5K 次閱讀 Java JavaScript

Android 判斷用戶2G/3G/4G移動數據網絡

在做 Android App 的時候，為了給用戶省流量，為了不激起用戶的憤怒，為了更好的用戶體驗，是需要根據用戶當前網絡情況來做一些調整的，也可以在 App 的設置模塊里，讓用戶自己選擇，在 2G / 3G / 4G 網絡條件下，是否允許請求一些流量比較大的數據。

通過 Android 提供的 TelephonyManager 和 ConnectivityManager 都可以獲取到 NetworksInfo 對象，可以通過 getType() 獲取類型，判斷是 wifi 還是 mobile ，如果是 mobile ，可以通過 NetworksInfo 對象的 getSubType() 和 getSubTypeName() 可以獲取到對于的網絡類型和名字。

網絡類型和名字定義在 TelephonyManager 類里。

/** Network type is unknown */
public static final int NETWORK_TYPE_UNKNOWN = 0;
/** Current network is GPRS */
public static final int NETWORK_TYPE_GPRS = 1;
/** Current network is EDGE */
public static final int NETWORK_TYPE_EDGE = 2;
/** Current network is UMTS */
public static final int NETWORK_TYPE_UMTS = 3;
/** Current network is CDMA: Either IS95A or IS95B*/
public static final int NETWORK_TYPE_CDMA = 4;
/** Current network is EVDO revision 0*/
public static final int NETWORK_TYPE_EVDO_0 = 5;
/** Current network is EVDO revision A*/
public static final int NETWORK_TYPE_EVDO_A = 6;
/** Current network is 1xRTT*/
public static final int NETWORK_TYPE_1xRTT = 7;
/** Current network is HSDPA */
public static final int NETWORK_TYPE_HSDPA = 8;
/** Current network is HSUPA */
public static final int NETWORK_TYPE_HSUPA = 9;
/** Current network is HSPA */
public static final int NETWORK_TYPE_HSPA = 10;
/** Current network is iDen */
public static final int NETWORK_TYPE_IDEN = 11;
/** Current network is EVDO revision B*/
public static final int NETWORK_TYPE_EVDO_B = 12;
/** Current network is LTE */
public static final int NETWORK_TYPE_LTE = 13;
/** Current network is eHRPD */
public static final int NETWORK_TYPE_EHRPD = 14;
/** Current network is HSPA+ */
public static final int NETWORK_TYPE_HSPAP = 15;

看到這個代碼和注釋，相信沒有這方面知識的人很難看懂，都啥玩意？這注釋跟沒注釋有啥區別？！就是讓人看著更加鬧心而已。所以說，注釋對閱讀代碼的人很重要。當然這些東西可能太專業了，寫這些代碼的人估計是想寫也不知道該怎么了，得寫多大一坨啊？！我在最后會貼上一些我整理的資料，可以供大家參考一下，不是很詳細，也不專業，就是大概有個印象。

TelephonyManager 還提供了 getNetworkTypeName(int type) 的方法，這個方法可以返回一個字符串，但是信息量不大。

那怎么判斷是 2G ， 3G 還是 4G 網絡呢？TelephonyManager 還提供了另外一個方法，getNetworkClass(int networkType) ，但這個方法被隱藏掉了，我把代碼貼一下。

public static int getNetworkClass(int networkType) {
switch (networkType) {
case NETWORK_TYPE_GPRS:
case NETWORK_TYPE_EDGE:
case NETWORK_TYPE_CDMA:
case NETWORK_TYPE_1xRTT:
case NETWORK_TYPE_IDEN:
return NETWORK_CLASS_2_G;
case NETWORK_TYPE_UMTS:
case NETWORK_TYPE_EVDO_0:
case NETWORK_TYPE_EVDO_A:
case NETWORK_TYPE_HSDPA:
case NETWORK_TYPE_HSUPA:
case NETWORK_TYPE_HSPA:
case NETWORK_TYPE_EVDO_B:
case NETWORK_TYPE_EHRPD:
case NETWORK_TYPE_HSPAP:
return NETWORK_CLASS_3_G;
case NETWORK_TYPE_LTE:
return NETWORK_CLASS_4_G;
default:
return NETWORK_CLASS_UNKNOWN;
}
}

然后下面是這幾個常量的值。

/** Unknown network class. {@hide} */
public static final int NETWORK_CLASS_UNKNOWN = 0;
/** Class of broadly defined "2G" networks. {@hide} */
public static final int NETWORK_CLASS_2_G = 1;
/** Class of broadly defined "3G" networks. {@hide} */
public static final int NETWORK_CLASS_3_G = 2;
/** Class of broadly defined "4G" networks. {@hide} */
public static final int NETWORK_CLASS_4_G = 3;

不知道為啥要把這些東西給隱藏起來，然道是不靠譜？！還是其他的更好的方式？！不知道，先這樣吧，現在通過上面的手段，是可以知道用戶用的是什么網絡，當然也可以區分出來用戶使用的是 2G ， 3G 還是 4G 了。當然，你獲取到這些數據后，你也可以推算出用戶用的是哪家公司的網絡，移動的，聯通的，還是電信的，當然，只在中國。而且虛擬運營商開始真正上市后，這個就區分不出來是京東的，還是國美，蘇寧的了，但是你可以知道你的手機號用的是聯通的網還是移動的網。

最后貼上我收集整理的一些資料，可以參考一下。

GPRS 2G(2.5) General Packet Radia Service 114kbps
EDGE 2G(2.75G) Enhanced Data Rate for GSM Evolution 384kbps
UMTS 3G WCDMA 聯通3G Universal Mobile Telecommunication System 完整的3G移動通信技術標準
CDMA 2G 電信 Code Division Multiple Access 碼分多址
EVDO_0 3G (EVDO 全程 CDMA2000 1xEV-DO) Evolution - Data Only (Data Optimized) 153.6kps - 2.4mbps 屬于3G
EVDO_A 3G 1.8mbps - 3.1mbps 屬于3G過渡，3.5G
1xRTT 2G CDMA2000 1xRTT (RTT - 無線電傳輸技術) 144kbps 2G的過渡,
HSDPA 3.5G 高速下行分組接入 3.5G WCDMA High Speed Downlink Packet Access 14.4mbps
HSUPA 3.5G High Speed Uplink Packet Access 高速上行鏈路分組接入 1.4 - 5.8 mbps
HSPA 3G (分HSDPA,HSUPA) High Speed Packet Access
IDEN 2G Integrated Dispatch Enhanced Networks 集成數字增強型網絡（屬于2G，來自維基百科）
EVDO_B 3G EV-DO Rev.B 14.7Mbps 下行 3.5G
LTE 4G Long Term Evolution FDD-LTE 和 TDD-LTE , 3G過渡，升級版 LTE Advanced 才是4G
EHRPD 3G CDMA2000向LTE 4G的中間產物 Evolved High Rate Packet Data HRPD的升級
HSPAP 3G HSPAP 比 HSDPA 快些

轉自：http://www.binkery.com/post/368.html

實例：

    import java.io.BufferedReader;

    import java.io.InputStreamReader;

    import java.text.DecimalFormat;

    import java.util.List;

import android.content.Context;  
import android.net.ConnectivityManager;  
import android.net.NetworkInfo;  
import android.net.wifi.WifiInfo;  
import android.net.wifi.WifiManager;  
import android.telephony.NeighboringCellInfo;  
import android.telephony.TelephonyManager;  
import android.telephony.cdma.CdmaCellLocation;  
import android.telephony.gsm.GsmCellLocation;  
import android.util.Log;  

public class NetWorkUtil {  

    public static boolean isWifiAvailable() {  
        ConnectivityManager connectivityManager = (ConnectivityManager) ConfigManager  
                .getContext().getSystemService(Context.CONNECTIVITY_SERVICE);  
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();  
        return (networkInfo != null && networkInfo.isConnected() && networkInfo  
                .getType() == ConnectivityManager.TYPE_WIFI);  
    }  

    /** 
     * 獲取MAC地址 
     *  
     * @param context 
     * @return 
     */  
    public static String getMacAddress(Context context) {  
        if (context == null) {  
            return "";  
        }  

        String localMac = null;  
        if (isWifiAvailable()) {  
            localMac = getWifiMacAddress(context);  
        }  

        if (localMac != null && localMac.length() > 0) {  
            localMac = localMac.replace(":", "-").toLowerCase();  
            return localMac;  
        }  

        localMac = getMacFromCallCmd();  
        if (localMac != null) {  
            localMac = localMac.replace(":", "-").toLowerCase();  
        }  

        return localMac;  
    }  

    private static String getWifiMacAddress(Context context) {  
        String localMac = null;  
        try {  
            WifiManager wifi = (WifiManager) context  
                    .getSystemService(Context.WIFI_SERVICE);  
            WifiInfo info = wifi.getConnectionInfo();  
            if (wifi.isWifiEnabled()) {  
                localMac = info.getMacAddress();  
                if (localMac != null) {  
                    localMac = localMac.replace(":", "-").toLowerCase();  
                    return localMac;  
                }  
            }  

        } catch (Exception e) {  
            e.printStackTrace();  
        }  

        return null;  
    }  

    /** 
     * 通過callCmd("busybox ifconfig","HWaddr")獲取mac地址 
     *  
     * @attention 需要設備裝有busybox工具 
     * @return Mac Address 
     */  
    private static String getMacFromCallCmd() {  
        String result = "";  
        result = callCmd("busybox ifconfig", "HWaddr");  

        if (result == null || result.length() <= 0) {  
            return null;  
        }  

        DebugLog.v("tag", "cmd result : " + result);  

        // 對該行數據進行解析  
        // 例如：eth0 Link encap:Ethernet HWaddr 00:16:E8:3E:DF:67  
        if (result.length() > 0 && result.contains("HWaddr") == true) {  
            String Mac = result.substring(result.indexOf("HWaddr") + 6,  
                    result.length() - 1);  
            if (Mac.length() > 1) {  
                result = Mac.replaceAll(" ", "");  
            }  
        }  

        return result;  
    }  

    public static String callCmd(String cmd, String filter) {  
        String result = "";  
        String line = "";  
        try {  
            Process proc = Runtime.getRuntime().exec(cmd);  
            InputStreamReader is = new InputStreamReader(proc.getInputStream());  
            BufferedReader br = new BufferedReader(is);  

            // 執行命令cmd，只取結果中含有filter的這一行  
            while ((line = br.readLine()) != null  
                    && line.contains(filter) == false) {  
            }  

            result = line;  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return result;  
    }  

    /** 
     * 網絡是否可用 
     *  
     * @param context 
     * @return 
     */  
    public static boolean IsNetWorkEnable(Context context) {  
        try {  
            ConnectivityManager connectivity = (ConnectivityManager) context  
                    .getSystemService(Context.CONNECTIVITY_SERVICE);  
            if (connectivity == null) {  
                ToastUtil.showMessage(context, "無法連接網絡");  
                return false;  
            }  

            NetworkInfo info = connectivity.getActiveNetworkInfo();  
            if (info != null && info.isConnected()) {  
                // 判斷當前網絡是否已經連接  
                if (info.getState() == NetworkInfo.State.CONNECTED) {  
                    return true;  
                }  
            }  

        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        ToastUtil.showMessage(context, "無法連接網絡");  
        return false;  
    }  

    private static final int NETWORK_TYPE_UNAVAILABLE = -1;  
    // private static final int NETWORK_TYPE_MOBILE = -100;  
    private static final int NETWORK_TYPE_WIFI = -101;  

    private static final int NETWORK_CLASS_WIFI = -101;  
    private static final int NETWORK_CLASS_UNAVAILABLE = -1;  
    /** Unknown network class. */  
    private static final int NETWORK_CLASS_UNKNOWN = 0;  
    /** Class of broadly defined "2G" networks. */  
    private static final int NETWORK_CLASS_2_G = 1;  
    /** Class of broadly defined "3G" networks. */  
    private static final int NETWORK_CLASS_3_G = 2;  
    /** Class of broadly defined "4G" networks. */  
    private static final int NETWORK_CLASS_4_G = 3;  

    private static DecimalFormat df = new DecimalFormat("#.##");  

    // 適配低版本手機  
    /** Network type is unknown */  
    public static final int NETWORK_TYPE_UNKNOWN = 0;  
    /** Current network is GPRS */  
    public static final int NETWORK_TYPE_GPRS = 1;  
    /** Current network is EDGE */  
    public static final int NETWORK_TYPE_EDGE = 2;  
    /** Current network is UMTS */  
    public static final int NETWORK_TYPE_UMTS = 3;  
    /** Current network is CDMA: Either IS95A or IS95B */  
    public static final int NETWORK_TYPE_CDMA = 4;  
    /** Current network is EVDO revision 0 */  
    public static final int NETWORK_TYPE_EVDO_0 = 5;  
    /** Current network is EVDO revision A */  
    public static final int NETWORK_TYPE_EVDO_A = 6;  
    /** Current network is 1xRTT */  
    public static final int NETWORK_TYPE_1xRTT = 7;  
    /** Current network is HSDPA */  
    public static final int NETWORK_TYPE_HSDPA = 8;  
    /** Current network is HSUPA */  
    public static final int NETWORK_TYPE_HSUPA = 9;  
    /** Current network is HSPA */  
    public static final int NETWORK_TYPE_HSPA = 10;  
    /** Current network is iDen */  
    public static final int NETWORK_TYPE_IDEN = 11;  
    /** Current network is EVDO revision B */  
    public static final int NETWORK_TYPE_EVDO_B = 12;  
    /** Current network is LTE */  
    public static final int NETWORK_TYPE_LTE = 13;  
    /** Current network is eHRPD */  
    public static final int NETWORK_TYPE_EHRPD = 14;  
    /** Current network is HSPA+ */  
    public static final int NETWORK_TYPE_HSPAP = 15;  

    /** 
     * 格式化大小 
     *  
     * @param size 
     * @return 
     */  
    public static String formatSize(long size) {  
        String unit = "B";  
        float len = size;  
        if (len > 900) {  
            len /= 1024f;  
            unit = "KB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "MB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "GB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "TB";  
        }  
        return df.format(len) + unit;  
    }  

    public static String formatSizeBySecond(long size) {  
        String unit = "B";  
        float len = size;  
        if (len > 900) {  
            len /= 1024f;  
            unit = "KB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "MB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "GB";  
        }  
        if (len > 900) {  
            len /= 1024f;  
            unit = "TB";  
        }  
        return df.format(len) + unit + "/s";  
    }  

    public static String format(long size) {  
        String unit = "B";  
        float len = size;  
        if (len > 1000) {  
            len /= 1024f;  
            unit = "KB";  
            if (len > 1000) {  
                len /= 1024f;  
                unit = "MB";  
                if (len > 1000) {  
                    len /= 1024f;  
                    unit = "GB";  
                }  
            }  
        }  
        return df.format(len) + "\n" + unit + "/s";  
    }  

    /** 
     * 獲取運營商 
     *  
     * @return 
     */  
    public static String getProvider() {  
        String provider = "未知";  
        try {  
            TelephonyManager telephonyManager = (TelephonyManager) ConfigManager  
                    .getContext().getSystemService(Context.TELEPHONY_SERVICE);  
            String IMSI = telephonyManager.getSubscriberId();  
            Log.v("tag", "getProvider.IMSI:" + IMSI);  
            if (IMSI == null) {  
                if (TelephonyManager.SIM_STATE_READY == telephonyManager  
                        .getSimState()) {  
                    String operator = telephonyManager.getSimOperator();  
                    Log.v("tag", "getProvider.operator:" + operator);  
                    if (operator != null) {  
                        if (operator.equals("46000")  
                                || operator.equals("46002")  
                                || operator.equals("46007")) {  
                            provider = "中國移動";  
                        } else if (operator.equals("46001")) {  
                            provider = "中國聯通";  
                        } else if (operator.equals("46003")) {  
                            provider = "中國電信";  
                        }  
                    }  
                }  
            } else {  
                if (IMSI.startsWith("46000") || IMSI.startsWith("46002")  
                        || IMSI.startsWith("46007")) {  
                    provider = "中國移動";  
                } else if (IMSI.startsWith("46001")) {  
                    provider = "中國聯通";  
                } else if (IMSI.startsWith("46003")) {  
                    provider = "中國電信";  
                }  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return provider;  
    }  

    /** 
     * 獲取網絡類型 
     *  
     * @return 
     */  
    public static String getCurrentNetworkType() {  
        int networkClass = getNetworkClass();  
        String type = "未知";  
        switch (networkClass) {  
        case NETWORK_CLASS_UNAVAILABLE:  
            type = "無";  
            break;  
        case NETWORK_CLASS_WIFI:  
            type = "Wi-Fi";  
            break;  
        case NETWORK_CLASS_2_G:  
            type = "2G";  
            break;  
        case NETWORK_CLASS_3_G:  
            type = "3G";  
            break;  
        case NETWORK_CLASS_4_G:  
            type = "4G";  
            break;  
        case NETWORK_CLASS_UNKNOWN:  
            type = "未知";  
            break;  
        }  
        return type;  
    }  

    private static int getNetworkClassByType(int networkType) {  
        switch (networkType) {  
        case NETWORK_TYPE_UNAVAILABLE:  
            return NETWORK_CLASS_UNAVAILABLE;  
        case NETWORK_TYPE_WIFI:  
            return NETWORK_CLASS_WIFI;  
        case NETWORK_TYPE_GPRS:  
        case NETWORK_TYPE_EDGE:  
        case NETWORK_TYPE_CDMA:  
        case NETWORK_TYPE_1xRTT:  
        case NETWORK_TYPE_IDEN:  
            return NETWORK_CLASS_2_G;  
        case NETWORK_TYPE_UMTS:  
        case NETWORK_TYPE_EVDO_0:  
        case NETWORK_TYPE_EVDO_A:  
        case NETWORK_TYPE_HSDPA:  
        case NETWORK_TYPE_HSUPA:  
        case NETWORK_TYPE_HSPA:  
        case NETWORK_TYPE_EVDO_B:  
        case NETWORK_TYPE_EHRPD:  
        case NETWORK_TYPE_HSPAP:  
            return NETWORK_CLASS_3_G;  
        case NETWORK_TYPE_LTE:  
            return NETWORK_CLASS_4_G;  
        default:  
            return NETWORK_CLASS_UNKNOWN;  
        }  
    }  

    private static int getNetworkClass() {  
        int networkType = NETWORK_TYPE_UNKNOWN;  
        try {  
            final NetworkInfo network = ((ConnectivityManager) ConfigManager  
                    .getContext()  
                    .getSystemService(Context.CONNECTIVITY_SERVICE))  
                    .getActiveNetworkInfo();  
            if (network != null && network.isAvailable()  
                    && network.isConnected()) {  
                int type = network.getType();  
                if (type == ConnectivityManager.TYPE_WIFI) {  
                    networkType = NETWORK_TYPE_WIFI;  
                } else if (type == ConnectivityManager.TYPE_MOBILE) {  
                    TelephonyManager telephonyManager = (TelephonyManager) ConfigManager  
                            .getContext().getSystemService(  
                                    Context.TELEPHONY_SERVICE);  
                    networkType = telephonyManager.getNetworkType();  
                }  
            } else {  
                networkType = NETWORK_TYPE_UNAVAILABLE;  
            }  

        } catch (Exception ex) {  
            ex.printStackTrace();  
        }  
        return getNetworkClassByType(networkType);  

    }  

    public static String getWifiRssi() {  
        int asu = 85;  
        try {  
            final NetworkInfo network = ((ConnectivityManager) ConfigManager  
                    .getContext()  
                    .getSystemService(Context.CONNECTIVITY_SERVICE))  
                    .getActiveNetworkInfo();  
            if (network != null && network.isAvailable()  
                    && network.isConnected()) {  
                int type = network.getType();  
                if (type == ConnectivityManager.TYPE_WIFI) {  
                    WifiManager wifiManager = (WifiManager) ConfigManager  
                            .getContext()  
                            .getSystemService(Context.WIFI_SERVICE);  

                    WifiInfo wifiInfo = wifiManager.getConnectionInfo();  
                    if (wifiInfo != null) {  
                        asu = wifiInfo.getRssi();  
                    }  
                }  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return asu + "dBm";  
    }  

    public static String getWifiSsid() {  
        String ssid = "";  
        try {  
            final NetworkInfo network = ((ConnectivityManager) ConfigManager  
                    .getContext()  
                    .getSystemService(Context.CONNECTIVITY_SERVICE))  
                    .getActiveNetworkInfo();  
            if (network != null && network.isAvailable()  
                    && network.isConnected()) {  
                int type = network.getType();  
                if (type == ConnectivityManager.TYPE_WIFI) {  
                    WifiManager wifiManager = (WifiManager) ConfigManager  
                            .getContext()  
                            .getSystemService(Context.WIFI_SERVICE);  

                    WifiInfo wifiInfo = wifiManager.getConnectionInfo();  
                    if (wifiInfo != null) {  
                        ssid = wifiInfo.getSSID();  
                        if (ssid == null) {  
                            ssid = "";  
                        }  
                        ssid = ssid.replaceAll("\"", "");  
                    }  
                }  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return ssid;  
    }  

    /** 
     * 檢查sim卡狀態 
     *  
     * @param ctx 
     * @return 
     */  
    public static boolean checkSimState() {  
        TelephonyManager tm = (TelephonyManager) ConfigManager.getContext()  
                .getSystemService(Context.TELEPHONY_SERVICE);  
        if (tm.getSimState() == TelephonyManager.SIM_STATE_ABSENT  
                || tm.getSimState() == TelephonyManager.SIM_STATE_UNKNOWN) {  
            return false;  
        }  

        return true;  
    }  

    /** 
     * 獲取imei 
     */  
    public static String getImei() {  
        TelephonyManager mTelephonyMgr = (TelephonyManager) ConfigManager  
                .getContext().getSystemService(Context.TELEPHONY_SERVICE);  
        String imei = mTelephonyMgr.getDeviceId();  
        if (imei == null) {  
            imei = "000000000000000";  
        }  
        return imei;  
    }  

    public static String getPhoneImsi() {  
        TelephonyManager mTelephonyMgr = (TelephonyManager) ConfigManager  
                .getContext().getSystemService(Context.TELEPHONY_SERVICE);  
        return mTelephonyMgr.getSubscriberId();  
    }  

    public static CellInfo getNetInfo() {  
        CellInfo info = new CellInfo();  
        try {  
            TelephonyManager mTelephonyManager = (TelephonyManager) ConfigManager  
                    .getContext().getSystemService(Context.TELEPHONY_SERVICE);  
            String operator = mTelephonyManager.getNetworkOperator();  
            if (operator != null) {  
                /** 通過operator獲取 MCC 和MNC */  
                if (operator.length() > 3) {  
                    String mcc = operator.substring(0, 3);  
                    String mnc = operator.substring(3);  
                    info.setMcc(mcc);  
                    info.setMnc(mnc);  
                }  
            }  

            int lac = 0;  
            int cellId = 0;  
            int phoneType = mTelephonyManager.getPhoneType();  
            if (phoneType == TelephonyManager.PHONE_TYPE_GSM) {  
                GsmCellLocation location = (GsmCellLocation) mTelephonyManager  
                        .getCellLocation();  
                /** 通過GsmCellLocation獲取中國移動和聯通 LAC 和cellID */  
                lac = location.getLac();  
                cellId = location.getCid();  
            } else if (phoneType == TelephonyManager.PHONE_TYPE_CDMA) {  
                CdmaCellLocation location = (CdmaCellLocation) mTelephonyManager  
                        .getCellLocation();  
                lac = location.getNetworkId();  
                cellId = location.getBaseStationId();  
                cellId /= 16;  
            }  
            if (lac == 0 || cellId == 0) {  
                List<NeighboringCellInfo> infos = mTelephonyManager  
                        .getNeighboringCellInfo();  
                int lc = 0;  
                int ci = 0;  
                int rssi = 0;  
                for (NeighboringCellInfo cell : infos) {  
                    // 根據鄰區總數進行循環  
                    if (lc == 0 || ci == 0) {  
                        lc = cell.getLac();  
                        ci = cell.getCid();  
                        rssi = cell.getRssi();  
                    }  
                    // sb.append(" LAC : " + info.getLac());  
                    // // 取出當前鄰區的LAC  
                    // sb.append(" CID : " + info.getCid());  
                    // // 取出當前鄰區的CID  
                    // sb.append(" BSSS : " + (-113 + 2 * info.getRssi()) +  
                    // "\n"); // 獲取鄰區基站信號強度  
                }  
                rssi = -113 + 2 * rssi;  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return info;  
    }  

}  </pre>

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