按下設備上的后退按鈕時，如何防止應用程序最小化/退出？在我的設備上按下返回按鈕時，我試圖分配“瀏覽器返回”功能，這是我的代碼：import 'react-native-get-random-values';import React, { useState, useRef, Component, useEffect  } from 'react'import {  Alert,  SafeAreaView,  StyleSheet,  StatusBar,  View,  Text,  ScrollView,  BackHandler,  RefreshControl} from 'react-native'import WebView from 'react-native-webview'import Icon from 'react-native-vector-icons/FontAwesome';import { Button } from 'react-native-elements';const App = () => {  function backButtonHandler(){}  function refreshHandler(){    if (webviewRef.current) webviewRef.current.reload()  }  useEffect(() => {    BackHandler.addEventListener("hardwareBackPress", backButtonHandler);    return () => {      BackHandler.removeEventListener("hardwareBackPress", backButtonHandler);    };  }, [backButtonHandler]);  let jscode = `window.onscroll=function(){window.ReactNativeWebView.postMessage(document.documentElement.scrollTop||document.body.scrollTop)}`;  const [canGoBack, setCanGoBack] = useState(false)  const [currentUrl, setCurrentUrl] = useState('')  const [refreshing, setRefreshing] = useState(false);  const [scrollviewState, setEnableRefresh] = useState(false);  const webviewRef = useRef(null)  const scrollviewRef = useRef(false)  backButtonHandler = () => {    if (webviewRef.current) webviewRef.current.goBack()  }我的問題是當我按下設備上的后退按鈕時，它確實調用了backButtonHandler函數并且我的 webview 導航回來，但同時應用程序也最小化了..有沒有辦法防止這種情況？