NetworkUtil.java

package ngo.sapne.intents.sapne;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

/**
 * Created by yogi on 24-11-2017.
 */

public class NetworkUtil {
  static Context context;
    /**
     * We use this class to determine if the application has been connected to either WIFI Or Mobile
     * Network, before we make any network request to the server.
     * <p>
     * The class uses two permission - INTERNET and ACCESS NETWORK STATE, to determine the user's
     * connection stats
     */

    private static NetworkUtil instance = new NetworkUtil();
    ConnectivityManager connectivityManager;

    boolean connected = false;

    public static NetworkUtil getInstance(Context ctx) {
        context = ctx.getApplicationContext();
        return instance;
    }

    public boolean isOnline() {
        try {
            connectivityManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

            connected = networkInfo != null && networkInfo.isAvailable() &&
                    networkInfo.isConnected();
            return connected;

        } catch (Exception e) {
            System.out.println("CheckConnectivity Exception: " + e.getMessage());
            Log.v("connectivity", e.toString());
        }
        return connected;
    }
}