android 判断网络连接的工具类

　　

 package com.way.util;

 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo.State;

 public class NetUtil {
     public static final int NETWORN_NONE = 0;
     public static final int NETWORN_WIFI = 1;
     public static final int NETWORN_MOBILE = 2;

     public static int getNetworkState(Context context) {
         ConnectivityManager connManager = (ConnectivityManager) context
                 .getSystemService(Context.CONNECTIVITY_SERVICE);

         // Wifi
         State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
                 .getState();
         if (state == State.CONNECTED || state == State.CONNECTING) {
             return NETWORN_WIFI;
         }

         // 3G
         state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
                 .getState();
         if (state == State.CONNECTED || state == State.CONNECTING) {
             return NETWORN_MOBILE;
         }
         return NETWORN_NONE;
     }
 }