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。
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/** 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。
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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。
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/** 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，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
实例：
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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); } /** * 获取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; } /** * 通过callCmd("busybox ifconfig","HWaddr")获取mac地址 * * @attention 需要设备装有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); // 对该行数据进行解析 // 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); // 执行命令cmd，只取结果中含有filter的这一行 while ((line = br.readLine()) != null && line.contains(filter) == false) { } result = line; } catch (Exception e) { e.printStackTrace(); } return result; } /** * 网络是否可用 * * @param context * @return */ public static boolean IsNetWorkEnable(Context context) { try { ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity == null) { ToastUtil.showMessage(context, "无法连接网络"); return false; } NetworkInfo info = connectivity.getActiveNetworkInfo(); if (info != null && info.isConnected()) { // 判断当前网络是否已经连接 if (info.getState() == NetworkInfo.State.CONNECTED) { return true; } } } catch (Exception e) { e.printStackTrace(); } ToastUtil.showMessage(context, "无法连接网络"); 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("#.##"); // 适配低版本手机 /** 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"; } /** * 获取运营商 * * @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 = "中国移动"; } else if (operator.equals("46001")) { provider = "中国联通"; } else if (operator.equals("46003")) { provider = "中国电信"; } } } } else { if (IMSI.startsWith("46000") || IMSI.startsWith("46002") || IMSI.startsWith("46007")) { provider = "中国移动"; } else if (IMSI.startsWith("46001")) { provider = "中国联通"; } else if (IMSI.startsWith("46003")) { provider = "中国电信"; } } } catch (Exception e) { e.printStackTrace(); } return provider; } /** * 获取网络类型 * * @return */ public static 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 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; } /** * 检查sim卡状态 * * @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; } /** * 获取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) { /** 通过operator获取 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(); /** 通过GsmCellLocation获取中国移动和联通 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) { // 根据邻区总数进行循环 if (lc == 0 || ci == 0) { lc = cell.getLac(); ci = cell.getCid(); rssi = cell.getRssi(); } // sb.append(" LAC : " + info.getLac()); // // 取出当前邻区的LAC // sb.append(" CID : " + info.getCid()); // // 取出当前邻区的CID // sb.append(" BSSS : " + (-113 + 2 * info.getRssi()) + // "\n"); // 获取邻区基站信号强度 } rssi = -113 + 2 * rssi; } } catch (Exception e) { e.printStackTrace(); } return info; } } |
希望本文所述对大家学习Android软件编程有所帮助。
