How to get Location updates even when gps is turned off using fused location api?

This may be asked many time but i couldn't any solution for this i need to get user location in background for ever 15 min it works fine when gps is turned on but when gps is turned of am not getting location updates when gps is turned off at least need to get network location or wifi location how can i achieve this with fused location api. Location manager has this functionality but in fused location i don't think so as google suggests the developer to use Location play service api i don't want to use location manager how can i achieve this so let me post what i tried so far:

mport android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.support.aotation.NonNull;
import android.util.Log;

import com.google.android.gms.common.CoectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.FusedLocationProviderApi;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;

/**
 * Created by 4264 on 14-10-2016.
 */

public class Locationlistener implements GoogleApiClient.CoectionCallbacks, GoogleApiClient.OnCoectionFailedListener,LocationListener  {


    private Location mlocation; // location
    private double latitude; // latitude
    private double longitude; // longitude
    private GoogleApiClient mGAC;
    private Context mContext;
    public static final String TAG = "GPSresource";
    private FusedLocationProviderApi fusedLocationProviderApi;
    private LocationRequest locationRequest;

    public Locationlistener(Context c)
    {
        mContext = c;
        try {
            buildGoogleApiClient();
            mGAC.coect();
        }
        catch(Exception e)
        {
            Log.d(TAG,e.toString());
        }
    }

    protected synchronized void buildGoogleApiClient() {
        locationRequest = LocationRequest.create();
        locationRequest.setPriority(LocationRequest.PRIORITY_LOW_POWER);
        locationRequest.setInterval(1);
        locationRequest.setFastestInterval(1);
        mGAC = new GoogleApiClient.Builder(mContext)
                .addCoectionCallbacks(this)
                .addOnCoectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
       }


    public double getLatitude(){
        if(mlocation != null){
            latitude = mlocation.getLatitude();
        }

        // return latitude
        return latitude;
    }

    /**
     * Function to get longitude
     * */
    public double getLongitude() {
        if (mlocation != null) {
            longitude = mlocation.getLongitude();
        }

        // return longitude
        return longitude;
    }

    public Location GetLocationBlocking() throws InterruptedException {



        //      String lat=String.valueOf(moCurrentLocation.getLatitude());
        //    String longt=String.valueOf(moCurrentLocation.getLongitude());
//        Toast.makeText(oContext,"Lat"+lat+"long"+longt,Toast.LENGTH_SHORT).show();
        return mlocation;

    }


    @Override
    public void onCoected(Bundle bundle) {
            Location oLocation = LocationServices.FusedLocationApi.getLastLocation(mGAC);
            if (mGAC != null) {

                mlocation = oLocation;
            getLatitude();
            getLongitude();
            if (oLocation != null){
              Log.d("lat",String.valueOf(mlocation.getLatitude()));
            Log.d("long",String.valueOf(mlocation.getLongitude()));
            }
            else{
                LocationServices.FusedLocationApi.requestLocationUpdates(mGAC, locationRequest, this);
        }   }}


    @Override
    public void onCoectionSuspended(int i) {

    }




    @Override
    public void onCoectionFailed(@NonNull CoectionResult coectionResult) {

    }

    @Override
    public void onLocationChanged(Location location) {
        mlocation=location;
    }
}