react-native Android - Hardware Back Button Hardware back button handling using BackHandler and Navigation Properties (without using deprecated BackAndroid & deprecated Navigator)
Example
This example will show you back navigation which is expected generally in most of the flows. You will have to add following code to every screen depending on expected behavior. There are 2 cases:
- If there are more than 1 screen on stack, device back button will show previous screen.
- If there is only 1 screen on stack, device back button will exit app.
Case 1: Show previous screen
import { BackHandler } from 'react-native';
constructor(props) {
super(props)
this.handleBackButtonClick = this.handleBackButtonClick.bind(this);
}
componentWillMount() {
BackHandler.addEventListener('hardwareBackPress', this.handleBackButtonClick);
}
componentWillUnmount() {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButtonClick);
}
handleBackButtonClick() {
this.props.navigation.goBack(null);
return true;
}
Important: Don't forget to bind method in constructor and to remove listener in componentWillUnmount.
Case 2: Exit App
In this case, no need to handle anything on that screen where you want to exit app.
Important: This should be only screen on stack.
