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 Android教程網 >> Android技術 >> 關於Android編程 >> Android判斷用戶2G/3G/4G移動數據網絡

Android判斷用戶2G/3G/4G移動數據網絡

編輯：關於Android編程

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 的設置模塊裡，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() 可以獲取到對於的網絡類型和名字。

網絡類型和名字定義在 TelephonyManager 類裡。

/** 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麼了，得寫多大一坨啊？！我在最後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。

那怎麼判斷是 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; 
} 
}

然後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，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麼網絡，當 然也可以區分出來用戶使用的是 2G ， 3G 還是 4G 了。當然，你獲取到這些數據後，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後， 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。

最後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移動通信技術標准
  • 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 屬於3G
  • EVDO_A  3G 1.8mbps - 3.1mbps 屬於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 （屬於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

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; 
  } 
  
}

希望本文所述對大家學習Android軟件編程有所幫助。

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