Check internet connection even if connected to wifi or 3G

Question

I need to check if there is internet connection even if the phone is connected to a wifi network or 3G. I have this code but it says only if connected to a network:

public class ConnectionDetector {

    private Context _context;

    public ConnectionDetector(Context context){
        this._context = context;
    }

    public boolean isConnectingToInternet(){
        ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
          if (connectivity != null) 
          {
              NetworkInfo[] info = connectivity.getAllNetworkInfo();
              if (info != null) 
                  for (int i = 0; i < info.length; i++) 
                      if (info[i].getState() == NetworkInfo.State.CONNECTED)
                      {
                          return true;
                      }

          }
          return false;
    }
}

Answer 1

I have created this class to get if the user is connected on the internet and what type of connection he has

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

public class NetWork {

    private static boolean connectionEstablished = false;

    /**
     * get the internet connection of the device
     *
     * @param context
     * @return the type of internet connection
     */
    private static NetWorkTypes getNetwork(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = cm.getActiveNetworkInfo();

        if (info == null || !info.isConnected())
            return NetWorkTypes.NO_CONNECTION;

        if (info.getType() == ConnectivityManager.TYPE_WIFI)
            return NetWorkTypes.WIFI;

        if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
            int networkType = info.getSubtype();
            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: // all above for 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: // all above for 3G

                case TelephonyManager.NETWORK_TYPE_LTE:   // 4G
                    return NetWorkTypes.MOBILE_NETWORK;
                default:
                    return NetWorkTypes.UNKNOWN;
            }
        }
        return NetWorkTypes.UNKNOWN;
    }

    /**
     * check if device is connected on the internet
     *
     * @param context
     * @return true if is connected, false if isn't
     */
    public static boolean isConnected(Context context) {
        NetWorkTypes netWorkType;
        netWorkType = getNetwork(context);
        if (netWorkType == NetWorkTypes.WIFI || netWorkType == NetWorkTypes.MOBILE_NETWORK) {
            connectionEstablished = true;
        } else {
            connectionEstablished = false;
        }
        return connectionEstablished;
    }

    /**
     * @return the boolean that tells if there is connection on the internet
     */
    public static boolean getConnectionEstablished() {
        return connectionEstablished;
    }
}

NetWorkTypes is just an enum. You can return anything else you wish