如何确定networkingtypes是2G，3G还是4G
我在我的应用程序上有一个指示器来显示networkingtypes（2G或3G或4G），但是在获得networkingtypes后，我怎么知道它应该在什么样的速度类别？
我知道如何检测networkingtypes：
private TelephonyManager telephonyManager; telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); CurrentNetworkType = telephonyManager.getNetworkType(); 给定可能的返回值：
// public static final int NETWORK_TYPE_1xRTT // Since: API Level 4 // Current network is 1xRTT // Constant Value: 7 (0x00000007) // // public static final int NETWORK_TYPE_CDMA // Since: API Level 4 // Current network is CDMA: Either IS95A or IS95B // Constant Value: 4 (0x00000004) // // public static final int NETWORK_TYPE_EDGE // Since: API Level 1 // Current network is EDGE // Constant Value: 2 (0x00000002) // // public static final int NETWORK_TYPE_EHRPD // Since: API Level 11 // Current network is eHRPD // Constant Value: 14 (0x0000000e) // // public static final int NETWORK_TYPE_EVDO_0 // Since: API Level 4 // Current network is EVDO revision 0 // Constant Value: 5 (0x00000005) // // public static final int NETWORK_TYPE_EVDO_A // Since: API Level 4 // Current network is EVDO revision A // Constant Value: 6 (0x00000006) // // public static final int NETWORK_TYPE_EVDO_B // Since: API Level 9 // Current network is EVDO revision B // Constant Value: 12 (0x0000000c) // // public static final int NETWORK_TYPE_GPRS // Since: API Level 1 // Current network is GPRS // Constant Value: 1 (0x00000001) // // public static final int NETWORK_TYPE_HSDPA // Since: API Level 5 // Current network is HSDPA // Constant Value: 8 (0x00000008) // // public static final int NETWORK_TYPE_HSPA // Since: API Level 5 // Current network is HSPA // Constant Value: 10 (0x0000000a) // // public static final int NETWORK_TYPE_HSPAP // Since: API Level 13 // Current network is HSPA+ // Constant Value: 15 (0x0000000f) // // public static final int NETWORK_TYPE_HSUPA // Since: API Level 5 // Current network is HSUPA // Constant Value: 9 (0x00000009) // // public static final int NETWORK_TYPE_IDEN // Since: API Level 8 // Current network is iDen // Constant Value: 11 (0x0000000b) // // public static final int NETWORK_TYPE_LTE // Since: API Level 11 // Current network is LTE // Constant Value: 13 (0x0000000d) // // public static final int NETWORK_TYPE_UMTS // Since: API Level 1 // Current network is UMTS // Constant Value: 3 (0x00000003) // // public static final int NETWORK_TYPE_UNKNOWN // Since: API Level 1 // Network type is unknown // Constant Value: 0 (0x00000000)
我会认为LTE是4G，但是其中哪些真的被认为是3G？ 还有什么我会考虑2G的。
那么你在3G和3G之间划线呢？
更新：我发现了另一个相关的答案在https://stackoverflow.com/a/8548926/949577它使用ConnectivityManager（）来获取types和子types，然后分类为快或不。 我不知道使用ConnectivityManager（）是否是使用TelephonyManager（）的更好方法，因为它们都能够返回networkingtypes。
我还发现了一个比较无线数据标准的链接http://en.wikipedia.org/wiki/Comparison_of_wireless_data_standards 。
你可以直接在你的Utility类中使用下面的方法：
public String getNetworkClass(Context context) { TelephonyManager mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); int networkType = mTelephonyManager.getNetworkType(); 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 "2G"; 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 "3G"; case TelephonyManager.NETWORK_TYPE_LTE: return "4G"; default: return "Unknown"; } }
感谢Android源代码的帮助。 =]
基于Android开发者文档和维基百科链接，在这里我给出了评论和定义networkingtypes。检查评论中的链接。
您可以使用getNetworkType来获取networkingtypes。
public class CommonUtils { /** * To get device consuming netowkr type is 2g,3g,4g * * @param context * @return "2g","3g","4g" as a String based on the network type */ public static String getNetworkType(Context context) { TelephonyManager mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); int networkType = mTelephonyManager.getNetworkType(); 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 "2g"; case TelephonyManager.NETWORK_TYPE_UMTS: case TelephonyManager.NETWORK_TYPE_EVDO_0: case TelephonyManager.NETWORK_TYPE_EVDO_A: /** From this link https://goo.gl/R2HOjR ..NETWORK_TYPE_EVDO_0 & NETWORK_TYPE_EVDO_A EV-DO is an evolution of the CDMA2000 (IS-2000) standard that supports high data rates. Where CDMA2000 https://goo.gl/1y10WI .CDMA2000 is a family of 3G[1] mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. */ 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: //Log.d("Type", "3g"); //For 3g HSDPA , HSPAP(HSPA+) are main networktype which are under 3g Network //But from other constants also it will 3g like HSPA,HSDPA etc which are in 3g case. //Some cases are added after testing(real) in device with 3g enable data //and speed also matters to decide 3g network type //http://goo.gl/bhtVT return "3g"; case TelephonyManager.NETWORK_TYPE_LTE: //No specification for the 4g but from wiki //I found(LTE (Long-Term Evolution, commonly marketed as 4G LTE)) //https://goo.gl/9t7yrR return "4g"; default: return "Notfound"; } } /** * To check device has internet * * @param context * @return boolean as per status */ public static boolean isNetworkConnected(Context context) { ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo netInfo = cm.getActiveNetworkInfo(); return netInfo != null && netInfo.isConnected(); }
}
您可以使用getSubtype()获取更多详细信息。
int netType = info.getType(); int netSubtype = info.getSubtype(); if (netType == ConnectivityManager.TYPE_WIFI) { return info.isConnected(); } else if (netType == ConnectivityManager.TYPE_MOBILE && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS && !mTelephony.isNetworkRoaming()) { return info.isConnected(); } else { return false; }
从技术上说，1xRTT是3G技术（尽pipe许多人认为它仅仅基于数据速度而言是2G）。 另外，您还需要将WiMax添加到switch语句以返回4G。 它不再经常使用，但Sprint的WiMaxnetworking目前仍在运行。
我想你真的只需要硬编码你想要的等价值。 大多数这些技术的快速search应该给你一些关于哪些被认为是3G或4G的想法（虽然在技术上没有一个是真正的4G）。 由于HSPA和HSPA +之间似乎没有区别，所以您可能需要进行某种速度或延迟检查，然后按照这种方式进行。
