Android判断用户的网络类型实例讲解(2/3/4G、wifi)

public static String GetNetworkType()
{
  String strNetworkType = "";
  
  NetworkInfo networkInfo = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE).getActiveNetworkInfo();
  if (networkInfo != null && networkInfo.isConnected())
  {
    if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI)
    {
      strNetworkType = "WIFI";
    }
    else if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE)
    {
      String _strSubTypeName = networkInfo.getSubtypeName();
      
      Log.e("cocos2d-x", "Network getSubtypeName : " + _strSubTypeName);
      
      // TD-SCDMA  networkType is 17
      int networkType = networkInfo.getSubtype();
      switch (networkType) {
        case TelephonyManager.NETWORK_TYPE_GPRS:
        case TelephonyManager.NETWORK_TYPE_EDGE:
        case TelephonyManager.NETWORK_TYPE_CDMA:
        case TelephonyManager.NETWORK_TYPE_1xRTT:
        case TelephonyManager.NETWORK_TYPE_IDEN: //api<8 : replace by 11
          strNetworkType = "2G";
          break;
        case TelephonyManager.NETWORK_TYPE_UMTS:
        case TelephonyManager.NETWORK_TYPE_EVDO_0:
        case TelephonyManager.NETWORK_TYPE_EVDO_A:
        case TelephonyManager.NETWORK_TYPE_HSDPA:
        case TelephonyManager.NETWORK_TYPE_HSUPA:
        case TelephonyManager.NETWORK_TYPE_HSPA:
        case TelephonyManager.NETWORK_TYPE_EVDO_B: //api<9 : replace by 14
        case TelephonyManager.NETWORK_TYPE_EHRPD: //api<11 : replace by 12
        case TelephonyManager.NETWORK_TYPE_HSPAP: //api<13 : replace by 15
          strNetworkType = "3G";
          break;
        case TelephonyManager.NETWORK_TYPE_LTE:  //api<11 : replace by 13
          strNetworkType = "4G";
          break;
        default:
          // http://baike.baidu.com/item/TD-SCDMA 中国移动 联通 电信 三种3G制式
          if (_strSubTypeName.equalsIgnoreCase("TD-SCDMA") || _strSubTypeName.equalsIgnoreCase("WCDMA") || _strSubTypeName.equalsIgnoreCase("CDMA2000")) 
          {
            strNetworkType = "3G";
          }
          else
          {
            strNetworkType = _strSubTypeName;
          }
          
          break;
       }
       
      Log.e("cocos2d-x", "Network getSubtype : " + Integer.valueOf(networkType).toString());
    }
  }
  
  Log.e("cocos2d-x", "Network Type : " + strNetworkType);
  
  return strNetworkType;
}