Android如何检测网络的类型为3G、2G、wap、wifi .

1、定义常量来标识几种网络类型 [java] view plaincopy/** 没有网络 */ public static final int NETWORKTYPE_INVALID = 0; /** wap网络 */ public static final int NETWORKTYPE_WAP = 1; /** 2G网络 */ public static final int NETWORKTYPE_2G = 2; [java] view plaincopy/** 3G和3G以上网络，或统称为快速网络 */ public static final int NETWORKTYPE_3G = 3; [java] view plaincopy/** wifi网络 */ public static final int NETWORKTYPE_WIFI = 4; 2、判断是否是FastMobileNetWork，将3G或者3G以上的网络称为快速网络[java] view plaincopy�1�3�1�3�1�3�1�3private static boolean isFastMobileNetwork(Context context) { TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE); switch (telephonyManager.getNetworkType()) { case TelephonyManager.NETWORK_TYPE_1xRTT: return false; // ~ 50-100 kbps case TelephonyManager.NETWORK_TYPE_CDMA: return false; // ~ 14-64 kbps case TelephonyManager.NETWORK_TYPE_EDGE: return false; // ~ 50-100 kbps case TelephonyManager.NETWORK_TYPE_EVDO_0: return true; // ~ 400-1000 kbps case TelephonyManager.NETWORK_TYPE_EVDO_A: return true; // ~ 600-1400 kbps case TelephonyManager.NETWORK_TYPE_GPRS: return false; // ~ 100 kbps case TelephonyManager.NETWORK_TYPE_HSDPA: return true; // ~ 2-14 Mbps case TelephonyManager.NETWORK_TYPE_HSPA: return true; // ~ 700-1700 kbps case TelephonyManager.NETWORK_TYPE_HSUPA: return true; // ~ 1-23 Mbps case TelephonyManager.NETWORK_TYPE_UMTS: return true; // ~ 400-7000 kbps case TelephonyManager.NETWORK_TYPE_EHRPD: return true; // ~ 1-2 Mbps case TelephonyManager.NETWORK_TYPE_EVDO_B: return true; // ~ 5 Mbps case TelephonyManager.NETWORK_TYPE_HSPAP: return true; // ~ 10-20 Mbps case TelephonyManager.NETWORK_TYPE_IDEN: return false; // ~25 kbps case TelephonyManager.NETWORK_TYPE_LTE: return true; // ~ 10+ Mbps case TelephonyManager.NETWORK_TYPE_UNKNOWN: return false; default: return false; } } 3、获取网络类型是否是2G、3G、wap、wifi等[java] view plaincopy/** * 获取网络状态，wifi,wap,2g,3g. * * @param context 上下文 * @return int 网络状态 {@link #NETWORKTYPE_2G},{@link #NETWORKTYPE_3G}, *{@link #NETWORKTYPE_INVALID},{@link #NETWORKTYPE_WAP}* {@link #NETWORKTYPE_WIFI} */ public static int getNetWorkType(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); if (networkInfo != null && networkInfo.isConnected()) { String type = networkInfo.getTypeName(); if (type.equalsIgnoreCase("WIFI")) { mNetWorkType = NETWORKTYPE_WIFI; } else if (type.equalsIgnoreCase("MOBILE")) { String proxyHost = android.net.Proxy.getDefaultHost(); mNetWorkType = TextUtils.isEmpty(proxyHost) ?