Are you developing your mobile app with React Native, and wondering how to handle the back button on Android devices? Keep reading to learn more.

On Android devices, you can add custom behavior when the back button on the phone is pressed. You can choose to go back to the previous page, exit the app, or add other custom logic to handle it. In this post, we will learn about the BackHandler API in React Native to address the hardware back button in Android devices.

BackHandler

React Native provides an API called BackHandler that is specific to Android. This API can detect when the hardware back button is pressed on Android devices. You can then use this API to listen to events and react to it.

addEventListener

The _addEventListener _method connects a JavaScript function with the hardware back press event. It creates an event listener and also returns a NativeEventSubscription object which needs to be cleared eventually.

static addEventListener(eventName, callback)

The addEventListener takes in a callback function as its second parameter. The callback function is triggered when the _event _we are listening to occurs (hardware back button press).

#react-native #mobile-apps #android