FusedLocationHelper class is used for requesting location for continuous location update or get only single time location update.

FusedLocationHelper.java

public class FusedLocationHelper implements GoogleApiClient.OnConnectionFailedListener, ResultCallback<Status> {

    private static final String TAG = FusedLocationHelper.class.getSimpleName();
    private Context context;
    private GoogleApiClient googleApiClient;
    private Location lastKnownLocation;
    private LocationUpdateListener locationUpdateListener;
    // location request parameter
    private long interval = 0;                  // time in millisecond
    private long fastestInterval = 0;           // time in millisecond
    private float smallestDisplacement = 0;     // meter
    private int priority = LocationRequest.PRIORITY_HIGH_ACCURACY;

    private LocationListener locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            Log.d(TAG, "onLocationChanged: " + location.toString());
            if (locationUpdateListener != null) {
                locationUpdateListener.onLocationUpdate(location);
            }
        }
    };
    private GoogleApiClient.ConnectionCallbacks continuousRequest = new GoogleApiClient.ConnectionCallbacks() {
        @Override
        public void onConnected(Bundle bundle) {
            Log.d(TAG, "ContinuousRequest : onConnected");
            startLocationUpdates();
        }

        @Override
        public void onConnectionSuspended(int cause) {
            Log.d(TAG, "ContinuousRequest : onConnectionSuspended = " + cause);
        }
    };

    private GoogleApiClient.ConnectionCallbacks singleRequest = new GoogleApiClient.ConnectionCallbacks() {
        @Override
        public void onConnected(Bundle bundle) {
            Log.d(TAG, "SingleRequest : onConnected");
            getLastKnownLocation();
        }

        @Override
        public void onConnectionSuspended(int cause) {
            Log.d(TAG, "SingleRequest : onConnectionSuspended = " + cause);
        }
    };

    public FusedLocationHelper(Context context) {
        this.context = context;
    }

    public static boolean isLocationEnable(Context context) {
        LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.d(TAG, "onConnectionFailed : " + connectionResult.getErrorMessage());
    }

    private void setupGoogleApiClient(GoogleApiClient.ConnectionCallbacks connectionCallbacks) {
        googleApiClient = new GoogleApiClient.Builder(context)
                .addApi(LocationServices.API)
                .addConnectionCallbacks(connectionCallbacks)
                .addOnConnectionFailedListener(this)
                .build();
        googleApiClient.connect();
    }

    public FusedLocationHelper setInterval(long interval) {
        this.interval = interval;
        return this;
    }

    public FusedLocationHelper setFastestInterval(long fastestInterval) {
        this.fastestInterval = fastestInterval;
        return this;
    }

    public FusedLocationHelper setSmallestDisplacement(float smallestDisplacement) {
        this.smallestDisplacement = smallestDisplacement;
        return this;
    }

    public FusedLocationHelper setPriority(int priority) {
        this.priority = priority;
        return this;
    }

    public FusedLocationHelper setLocationUpdateListener(LocationUpdateListener locationUpdateListener) {
        this.locationUpdateListener = locationUpdateListener;
        return this;
    }

    public void stop() {
        if (googleApiClient != null && googleApiClient.isConnected()) {
            stopLocationUpdates();
            googleApiClient.disconnect();
        }
    }

    /**
     * create location request
     *
     * @return instance of LocationRequest
     */
    private LocationRequest createLocationRequest() {
        LocationRequest mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(interval);
        mLocationRequest.setFastestInterval(fastestInterval);
        mLocationRequest.setSmallestDisplacement(smallestDisplacement);
        mLocationRequest.setPriority(priority);
        return mLocationRequest;
    }

    public FusedLocationHelper requestSingleLocation() {
        // set google api client
        setupGoogleApiClient(singleRequest);
        return this;
    }

    private void getLastKnownLocation() {
        if (ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        lastKnownLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
        if (lastKnownLocation != null) {
            Log.d(TAG, "getLastKnownLocation : " + lastKnownLocation.toString());
            if (locationUpdateListener != null) {
                locationUpdateListener.onLocationUpdate(lastKnownLocation);
            }
            googleApiClient.disconnect();
        } else {
            LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, createLocationRequest(), new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    Log.d(TAG, "getLastKnownLocation: onLocationChanged: " + location.toString());
                    if (locationUpdateListener != null) {
                        locationUpdateListener.onLocationUpdate(location);
                    }
                    LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
                    googleApiClient.disconnect();
                }
            });
        }
    }

    public FusedLocationHelper requestContinuousLocation() {
        // set google api client
        setupGoogleApiClient(continuousRequest);
        return this;
    }

    private void startLocationUpdates() {
        if (ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, createLocationRequest(), locationListener);
        pendingResult.setResultCallback(this);
    }

    private void stopLocationUpdates() {
        if (ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, locationListener);
        pendingResult.setResultCallback(this);
    }

    @Override
    public void onResult(@NonNull Status status) {
        Log.d(TAG, "PendingResult : " + status.getStatusMessage());
    }

    public interface LocationUpdateListener {
        void onLocationUpdate(Location location);
    }
}