Detect App Getting Focus in React Native

Question

I'm trying to detect when the app gains the focus back (i.e. switch to it from another app) in order to perform a certain task. Is there a way to detect this in React Native?

What I'm doing is copying a file to a temp location, opening it with an external viewer, and then I want to delete the file when the user switches back from the app.

Answer 1

The AppState module might be what you are looking for. Have a look at the documentation.