react-query/examples/react/react-native/src/hooks/useAppState.ts

import { useEffect } from 'react'
import { AppState } from 'react-native'
import type { AppStateStatus } from 'react-native'

export function useAppState(onChange: (status: AppStateStatus) => void) {
  useEffect(() => {
    const subscription = AppState.addEventListener('change', onChange)
    return () => {
      subscription.remove()
    }
  }, [onChange])
}