content: package com.alvinhkh.buseta.utils;
  
  import android.content.Context;
  import android.net.ConnectivityManager;
  import android.net.NetworkInfo;
  import android.telephony.TelephonyManager;
  import android.util.Log;
  
  /**
   * Check device's network connectivity and speed
   * @author emil http://stackoverflow.com/users/220710/emil
   */
  public class ConnectivityUtil {
  
      public static void toLog(Context context) {
          if (null == context) return;
          String TAG = null == context.getClass() ?
                  ConnectivityUtil.class.getSimpleName() : context.getClass().getSimpleName();
          Log.d(TAG, "isConnected: " + isConnected(context));
          Log.d(TAG, "isConnectedMobile: " + isConnectedMobile(context));
          Log.d(TAG, "isConnectedWifi: " + isConnectedWifi(context));
      }
  
      /**
       * Get the network info
       * @param context
       * @return
       */
      public static NetworkInfo getNetworkInfo(Context context){
          ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
          return cm != null ? cm.getActiveNetworkInfo() : null;
      }
  
      /**
       * Check if there is any connectivity
       * @param context
       * @return
       */
      public static boolean isConnected(Context context){
          NetworkInfo info = ConnectivityUtil.getNetworkInfo(context);
          return (info != null && info.isConnected());
      }
  
      /**
       * Check if there is any connectivity to a Wifi network
       * @param context
       * @return
       */
      public static boolean isConnectedWifi(Context context){
          NetworkInfo info = ConnectivityUtil.getNetworkInfo(context);
          return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_WIFI);
      }
  
      /**
       * Check if there is any connectivity to a mobile network
       * @param context
       * @return
       */
      public static boolean isConnectedMobile(Context context){
          NetworkInfo info = ConnectivityUtil.getNetworkInfo(context);
          return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_MOBILE);
      }
  
      /**
       * Check if there is fast connectivity
       * @param context
       * @return
       */
      public static boolean isConnectedFast(Context context){
          NetworkInfo info = ConnectivityUtil.getNetworkInfo(context);
          return (info != null && info.isConnected() && ConnectivityUtil.isConnectionFast(info.getType(),info.getSubtype()));
      }
  
      /**
       * Check if the connection is fast
       * @param type
       * @param subType
       * @return
       */
      public static boolean isConnectionFast(int type, int subType){
          if(type==ConnectivityManager.TYPE_WIFI){
              return true;
          }else if(type==ConnectivityManager.TYPE_MOBILE){
              switch(subType){
                  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
  			/*
  			 * Above API level 7, make sure to set android:targetSdkVersion
  			 * to appropriate level to use these
  			 */
                  case TelephonyManager.NETWORK_TYPE_EHRPD: // API level 11
                      return true; // ~ 1-2 Mbps
                  case TelephonyManager.NETWORK_TYPE_EVDO_B: // API level 9
                      return true; // ~ 5 Mbps
                  case TelephonyManager.NETWORK_TYPE_HSPAP: // API level 13
                      return true; // ~ 10-20 Mbps
                  case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8
                      return false; // ~25 kbps
                  case TelephonyManager.NETWORK_TYPE_LTE: // API level 11
                      return true; // ~ 10+ Mbps
                  // Unknown
                  case TelephonyManager.NETWORK_TYPE_UNKNOWN:
                  default:
                      return false;
              }
          }else{
              return false;
          }
      }
  
  }