Challenge 29 : webview

Android Programming (4th Edition) 29. Browsing the Web and WebView
1

hi. I’ve been trying to get through this challenge by creating a simple getter for “webView” in PhotoPageFragment and in PhotoPageActivity creating an instance of PhotoPageFragment and calling the fun to get its webView.
then I override the onBackPressed() fun to try control the history.
but when i do this i get an exception that the webView that i get from PhotoPageFragment is not initialized and the app crashes.
id thank you for your help if someone can give assistance.

2

Maybe it’s not relevant, but you can add this code in your onCreate in PhotoPageFragment

requireActivity()

        .onBackPressedDispatcher
        .addCallback(this, object : OnBackPressedCallback(true) {
            override fun handleOnBackPressed() {
                if (webView.canGoBack()) {
                    webView.goBack();
                } else {
                    isEnabled = false
                    requireActivity().onBackPressed()
                }
            }
        }
        )