Android 判断用户2G/3G/4G移动数据网络

在做 Android App 的时候，为了给用户省流量，为了不激起用户的愤怒，为了更好的用户体验，是需要根据用户当前网络情况来做一些调整的，也可以在 App 的设置模块里，让用户自己选择，在 2G / 3G / 4G 网络条件下，是否允许请求一些流量比较大的数据。

通过 Android 提供的 TelephonyManager 和 ConnectivityManager 都可以获取到 NetworksInfo 对象，可以通过 getType() 获取类型，判断是 wifi 还是 mobile ，如果是 mobile ，可以通过 NetworksInfo 对象的 getSubType() 和 getSubTypeName() 可以获取到对于的网络类型和名字。

网络类型和名字定义在 TelephonyManager 类里。

/** 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;

看到这个代码和注释，相信没有这方面知识的人很难看懂，都啥玩意？这注释跟没注释有啥区别？！就是让人看着更加闹心而已。所以说，注释对阅读代码的人很重要。当然这些东西可能太专业了，写这些代码的人估计是想写也不知道该怎么了，得写多大一坨啊？！我在最后会贴上一些我整理的资料，可以供大家参考一下，不是很详细，也不专业，就是大概有个印象。

TelephonyManager 还提供了 getNetworkTypeName(int type) 的方法，这个方法可以返回一个字符串，但是信息量不大。

那怎么判断是 2G ， 3G 还是 4G 网络呢？TelephonyManager 还提供了另外一个方法，getNetworkClass(int networkType) ，但这个方法被隐藏掉了，我把代码贴一下。

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;    }}

　　然后下面是这几个常量的值。

/** 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;

不知道为啥要把这些东西给隐藏起来，然道是不靠谱？！还是其他的更好的方式？！不知道，先这样吧，现在通过上面的手段，是可以知道用户用的是什么网络，当然也可以区分出来用户使用的是 2G ， 3G 还是 4G 了。当然，你获取到这些数据后，你也可以推算出用户用的是哪家公司的网络，移动的，联通的，还是电信的，当然，只在中国。而且虚拟运营商开始真正上市后，这个就区分不出来是京东的，还是国美，苏宁的了，但是你可以知道你的手机号用的是联通的网还是移动的网。

最后贴上我收集整理的一些资料，可以参考一下。

GPRS : 2G(2.5) General Packet Radia Service 114kbps
EDGE : 2G(2.75G) Enhanced Data Rate for GSM Evolution 384kbps
UMTS : 3G WCDMA 联通3G Universal Mobile Telecommunication System 完整的3G移动通信技术标准
CDMA : 2G 电信 Code Division Multiple Access 码分多址
EVDO_0 : 3G (EVDO 全程 CDMA2000 1xEV-DO) Evolution - Data Only (Data Optimized) 153.6kps - 2.4mbps 属于3G
EVDO_A : 3G 1.8mbps - 3.1mbps 属于3G过渡，3.5G
1xRTT : 2G CDMA2000 1xRTT (RTT - 无线电传输技术) 144kbps 2G的过渡,
HSDPA : 3.5G 高速下行分组接入 3.5G WCDMA High Speed Downlink Packet Access 14.4mbps
HSUPA : 3.5G High Speed Uplink Packet Access 高速上行链路分组接入 1.4 - 5.8 mbps
HSPA : 3G (分HSDPA,HSUPA) High Speed Packet Access
IDEN : 2G Integrated Dispatch Enhanced Networks 集成数字增强型网络（属于2G，来自维基百科）
EVDO_B : 3G EV-DO Rev.B 14.7Mbps 下行 3.5G
LTE : 4G Long Term Evolution FDD-LTE 和 TDD-LTE , 3G过渡，升级版 LTE Advanced 才是4G
EHRPD : 3G CDMA2000向LTE 4G的中间产物 Evolved High Rate Packet Data HRPD的升级
HSPAP : 3G HSPAP 比 HSDPA 快些

有朋友说他是移动 4G 的网络，获取到的是 17。于是我又去翻了一下源码，找到了如下的代码。也就是说当有新的类型被支持的时候，Android 会增加对于的类型代码。确实 17 是 NETWORKTYPETD_SCDMA 也就是移动的那一坨。其他的代码就不贴了，大概就是这个意思。下面的代码是5.1的代码。

/** 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;/** Current network is GSM {@hide} */public static final int NETWORK_TYPE_GSM = 16; /** Current network is TD_SCDMA {@hide} */public static final int NETWORK_TYPE_TD_SCDMA = 17;/** Current network is IWLAN {@hide} */public static final int NETWORK_TYPE_IWLAN = 18;

　　示例：

/////////* * 前边注释和后边注释是后来加的判断网络类型 *///WIFI("wifi", 1), G2("2G", 2), G3("3G", 3), WAP("wap", 4), NO("invalid", 5), ALL(//"all", 6), G4("4G",7);private static final int NETWORK_TYPE_UNAVAILABLE = 5;      // private static final int NETWORK_TYPE_MOBILE = -100;  private static final int NETWORK_TYPE_WIFI = 1;    private static final int NETWORK_CLASS_WIFI = 1;  private static final int NETWORK_CLASS_UNAVAILABLE = 5;      /** Unknown network class. */  private static final int NETWORK_CLASS_UNKNOWN = 6;      /** Class of broadly defined "2G" networks. */      private static final int NETWORK_CLASS_2_G = 2;      /** Class of broadly defined "3G" networks. */      private static final int NETWORK_CLASS_3_G = 3;      /** Class of broadly defined "4G" networks. */      private static final int NETWORK_CLASS_4_G = 7;  /**      * 获取网络类型      *       * @return      */      public String getCurrentNetworkType() {          int networkClass = getNetworkClass();          String type = "未知";          switch (networkClass) {          case NETWORK_CLASS_UNAVAILABLE:              type = "无";              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 int getNetworkClassByType(int networkType) {          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:              return NETWORK_CLASS_2_G;          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:          case TelephonyManager.NETWORK_TYPE_EHRPD:          case TelephonyManager.NETWORK_TYPE_HSPAP:              return NETWORK_CLASS_3_G;          case TelephonyManager.NETWORK_TYPE_LTE:              return NETWORK_CLASS_4_G;          default:              return NETWORK_CLASS_UNKNOWN;          }      }      private int getNetworkClass() {              connectivityManager = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);     networkInfo = connectivityManager.getActiveNetworkInfo();                        if (networkInfo != null&& networkInfo.isConnected()) {                  int type = networkInfo.getType();                  if (type == ConnectivityManager.TYPE_WIFI) {                  mNetWorkType =  NetEnum.WIFI.getID();                } else if (type == ConnectivityManager.TYPE_MOBILE) {                      TelephonyManager telephonyManager = (TelephonyManager) this.getSystemService(                                      Context.TELEPHONY_SERVICE);                      mNetWorkType = getNetworkClassByType(telephonyManager.getNetworkType());                }              } else {              mNetWorkType = NETWORK_TYPE_UNAVAILABLE;              }           return mNetWorkType;        }     ////

　　参考博客：http://blog.binkery.com/android/networks_type.html

http://www.eoeandroid.com/thread-540327-1-1.html?_dsign=77a59737

最近在项目中用到啦，总结了下。。。。大部分都是别人总结好的，就直接拿过来啦，哈哈。。

转：Android(安卓)判断用户2G/3G/4G移动数据网络

Android 判断用户2G/3G/4G移动数据网络

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