React-native componentWillUnmount not being called

Question

I'm running on Android and if I used the hardware back button to exit the application the componentWillUnmount function gets called. However, if I use the square button to show the list of running apps and swipe to close the function does not get called.

Any ideas on how to detect when the app is being closed so that I can clear timers, save data etc.

Thanks.

Answer 1

You can check AppState Api for information about detecting current state foreground or active. https://facebook.github.io/react-native/docs/appstate.html