How to create global android device back button handler using React Native?

In my scenario, I am trying to create global class for android back button handler and reuse it in multiple screen class files. How to do it? I tried below code but I dont know how to access common class from other classes.

My Code Below (Androidhandler.tsx)

export default class hardware extends Component {  constructor(props) {    super(props);    this.BackButton = this.BackButton.bind(this);  }  componentWillMount() {    BackHandler.addEventListener'BackPress',this.BackButton);  }  componentWillUnmount() {    BackHandler.removeEventListener('BackPress',this.BackButton);  }  BackButton() {    if(this.props.navigation){        this.props.navigation.goBack(null);        return true;      }    }}