webviw 에러페이지 처리 ㅠㅠ

Question

404 에러 처리를 하려고 

mWebView.setWebViewClient(new WebViewClient() {

            @Override
            public void onReceivedHttpError (WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {
                mWebView.loadUrl(ERROR_URL);
                ENTRY_URL = ERROR_URL;
                super.onReceivedHttpError(view,request,errorResponse);
            }

            @Override
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
                super.onReceivedError(view,errorCode,description,failingUrl);
             }
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return true;
            }
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon){
                Log.e(this.getClass().getName(),"onPageStarted");
            }
            @Override
            public void onPageFinished(WebView view, String url) {  //android  --->> web
                  isWebbfinished = true;
            }
        });

if(isWebbfinished)

mWebView.loadUrl(ENTRY_URL);

 

이렇게 하려고하는데 에러가기도 전에 먼저 마지막줄인 mWebView.loadUrl이 실행되어 0.몇초동안 에러페이지가 노출됩니다...

어떻게 해야할까요?