How call a string that it’s in another method

Sorry for this newbie simple question, but I need to pass a String from one method to another method.

the String values (bd_lat) I wanna pass are inside this method:

protected void onCreate(Bundle savedInstanceState) {

String bd_lat = object.getString("latitude");

}

this is another method

@Override
    public void onMapReady(GoogleMap googleMap) {

LatLng Bello = new LatLng(HOW PUT HERE STRING bd_lat, -75.5580);

}