NetworkUtils.java

package com.yourpackage.example;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.util.Log;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;


public class NetworkUtils {

    private final static String TAG = NetworkUtils.class.getName();

    public static boolean hasInternetConnection(Context context) {
        if (isNetworkAvailable(context)) {
            try {
                HttpURLConnection urlc = (HttpURLConnection) new URL("http://clients3.google.com/generate_204").openConnection();
                urlc.setRequestProperty("User-Agent", "Android");
                urlc.setRequestProperty("Connection", "close");
                urlc.setConnectTimeout(1500);
                urlc.connect();
                return urlc.getResponseCode() == 204;
            } catch (IOException e) {
                Log.e(TAG, "Error checking internet connection", e);
            }
        } else {
            Log.d(TAG, "No network available!");
        }
        return false;
    }

    public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();
        return netInfo != null && netInfo.isConnected();
    }
}