android - Ignore a certain webpage when pressing back button -


recently added local error page android webview app. when webpage fails load properly, shows local html file.

webview.setwebviewclient(new webviewclient() {                //on error, open local file         public void onreceivederror(webview view, int errorcode, string description, string failingurl) {             webview.loadurl("file:///android_asset/www/myerrorpage.html");          }  });

my code when button pressed:

private boolean exit = false; private long timestamp = 0; private handler handler = new handler(); @override // detect when button pressed public void onbackpressed() {     if(webview.cangoback()) {         webview.goback();     }     else {         if (exit) {             exit = false; //added             this.finish();         }         else {              //added:             if (timestamp == 0 || (system.currenttimemillis() - timestamp) > 3000) {                 toast.maketext(this, "press again close.",                     toast.length_short).show();                 exit = true;                  timestamp = system.currenttimemillis(); //added                  handler.postdelayed(new runnable() {                     @override                     public void run() {                         exit = false;                     }                 }, 3 * 1000);             }         }      } }

specific problem:

when press button previous page "file:///android_asset/www/myerrorpage.html", should ignore errorpage , go go last webpage loaded correctly. how can this?

@override     public void onbackpressed() {         if (wvcontactus.cangoback()) {             wvcontactus.goback();         } else {             super.onbackpressed();         }     }    webview.setwebviewclient(new webviewclient() {                //on error, open local file         public void onreceivederror(webview view, int errorcode, string description, string failingurl) {             webview.loadurl("file:///android_asset/www/myerrorpage.html");                 onbackpressed();         }  });

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