locationClient = LocationServices.getFusedLocationProviderClient(this);
    googleApiClient = new GoogleApiClient.Builder(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .build();

@Override
public void onConnected(@Nullable Bundle bundle) {
    updateLocation();
}

@Override
public void onConnectionSuspended(int i) {
    googleApiClient.connect();
}

@SuppressWarnings({"MissingPermission"})
@OnClick(R.id.searchRestaurantsFab)
public void updateLocation() {
    locationClient.getLastLocation().addOnSuccessListener(this, new OnSuccessListener<Location>() {
        @Override
        public void onSuccess(Location location) {
            if (location == null) {
                Toast.makeText(MapsActivity.this, "Включите GPS", Toast.LENGTH_SHORT).show();
            } else if (mapIsReady) {
                mapsFragment.showMyLocation(location);
                updateRestaurants(location);
            }
        }
    });
}