want an internet alert box for my webview

Question

i created an app for webview but in my webview I want an internet alert box that wants to popup when internet connection is not there. my javafile

`

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    webview =(WebView)findViewById(R.id.webView);
    spinner = (ProgressBar)findViewById(R.id.progressBar1);
    webview.setWebViewClient(new CustomWebViewClient());

    webview.getSettings().setJavaScriptEnabled(true);
    webview.getSettings().setDomStorageEnabled(true);
    webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
    webview.loadUrl("https://moodle.kluniversity.in/login/index.php");

}

// This allows for a splash screen
// (and hide elements once the page loads)
private class CustomWebViewClient extends WebViewClient {

    @Override
    public void onPageStarted(WebView webview, String url, Bitmap favicon) {

        // only make it invisible the FIRST time the app is run
        if (ShowOrHideWebViewInitialUse.equals("show")) {
            webview.setVisibility(webview.INVISIBLE);
        }
    }

    @Override
    public void onPageFinished(WebView view, String url) {

        ShowOrHideWebViewInitialUse = "hide";
        spinner.setVisibility(View.GONE);

        view.setVisibility(webview.VISIBLE);
        super.onPageFinished(view, url);

    }
}

and thats the information those are my java file .what i want is a internet alert box enter image description here like shown in the image.please help me in this .hope i will get the answer

Refer to : 1) [how to check if internet connectivity is available or not](https://stackoverflow.com/a/16124915/5990846) and 2) [how to show alert dialog](https://stackoverflow.com/questions/2115758/how-do-i-display-an-alert-dialog-on-android). Apply first solution in `onCreate()`, if it's not available show dialog(solution 2); otherwise load webview. — Jay, Feb 01 '19 at 13:10

score 0 · Answer 1 · answered Feb 01 '19 at 13:10

Check network connection before trying to load URL in WebView:

public boolean isOnline() {
    ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = conMgr.getActiveNetworkInfo();

    if(netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable()){
        Toast.makeText(context, "No Internet connection!", Toast.LENGTH_LONG).show();
        // Your code to show dialog..
        return false;
    }
   return true; 
}

Keep in mind above method does not check if there is an active internet connection, but only if device is connected to WiFi or Data.

want an internet alert box for my webview

1 Answers1