How do I get onresume event from React-Native?

Question

How do I get onresume event from React-Native? I want to do some check when Android main activity resumed. I check source code of RN, but it seems no event when app resumed.

Answer 1

React Native provides AppState to tell if the app is in the foreground or background, and notify us when the state changes.

    import React, {Component} from 'react'     import {AppState, Text} from 'react-native'      class AppStateExample extends Component {        state = {         appState: AppState.currentState       }        componentDidMount() {         AppState.addEventListener('change', this._handleAppStateChange);       }        componentWillUnmount() {         AppState.removeEventListener('change', this._handleAppStateChange);       }        _handleAppStateChange = (nextAppState) => {         if (this.state.appState.match(/inactive|background/) && nextAppState === 'active') {           console.log('App has come to the foreground!')         }         this.setState({appState: nextAppState});       }        render() {         return (           <Text>Current state is: {this.state.appState}</Text>         );       }      } 

source: https://facebook.github.io/react-native/docs/appstate.html

Answer 2

you can use AppState
read this document
https://facebook.github.io/react-native/docs/appstate.html