How can I show a custom "webpage not available" page in Android WebView?

Question

I'm out to do something when no connection is available page/alert in WebView (e.g. load a local html page or alert). I've to play with Prevent WebView from displaying "web page not available" but without any success. Any suggestions would be appreciated.

Answer 1

这一切都归结为只是从onReceivedError显示一个AlertDialog:

 @Override
 public void onReceivedError(WebView webView, int errorCode, String description, String failingUrl) {
                    //Clearing the WebView
                    try {
                        webView.stopLoading();
                    } catch (Exception e) {
                    }
                    try {
                        webView.clearView();
                    } catch (Exception e) {
                    }
                    if (webView.canGoBack()) {
                        webView.goBack();
                    }
                    webView.loadUrl("about:blank");

                    //Showing and creating an alet dialog
                    AlertDialog alertDialog = new AlertDialog.Builder(youractivity.this).create();
                    alertDialog.setTitle("Error");
                    alertDialog.setMessage("No internet connection was found!");
                    alertDialog.setButton("Again", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int which) {
                           finish();
                           startActivity(getIntent());
                       }
                    });

                    alertDialog.show();

                    //Don't forget to call supper!
                    super.onReceivedError(webView, errorCode, description, failingUrl);
                }

如果您是WebView的新手,那么您将希望实现onReceivedError,如下所示:

mWebView.setWebViewClient(new WebViewClient() {
    public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
        //Code here
    }
});