android开发获取网络状态，wifi,wap,2g,3g.工具类(一)

android开发获取网络状态整理:

 package com.gzcivil.utils;

 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;

 public class NetworkUtils {

     /** 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;
     /** 3G和3G以上网络，或统称为快速网络 */
     public static final int NETWORKTYPE_3G = 3;
     /** USB网络 */
     public static final int NETWORKTYPE_USB = 4;
     /** wifi网络 */
     public static final int NETWORKTYPE_WIFI = 5;

     /**
      * 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}*
      *         <p>
      *         {@link #NETWORKTYPE_WIFI}
      */
     public static int getNetWorkType(Context context) {
         ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo networkInfo = manager.getActiveNetworkInfo();
         int mNetWorkType = 0;
         if (networkInfo != null && networkInfo.isConnected()) {
             String type = networkInfo.getTypeName();
             if (type.equalsIgnoreCase("WIFI")) {
                 mNetWorkType = NETWORKTYPE_WIFI;
             } else if (type.equalsIgnoreCase("usb")) {
                 mNetWorkType = NETWORKTYPE_USB;
             } else if (type.equalsIgnoreCase("MOBILE")) {
                 @SuppressWarnings("deprecation")
                 String proxyHost = android.net.Proxy.getDefaultHost();
                 mNetWorkType = TextUtils.isEmpty(proxyHost) ? (isFastMobileNetwork(context) ? NETWORKTYPE_3G : NETWORKTYPE_2G) : NETWORKTYPE_WAP;
             }
         } else {
             mNetWorkType = NETWORKTYPE_INVALID;
         }
         return mNetWorkType;
     }

     private 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;
         }
     }
 }