shouldOverrideUrlLoading.java

 webView.setWebViewClient(new WebViewClient() {

            @SuppressWarnings("deprecation")
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return handlerUri(view, Uri.parse(url));
            }

            @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
                return handlerUri(view, request.getUrl());
            }

            private boolean handlerUri(WebView view, final Uri uri) {
                if (DEBUG) {
                    Logger.t(TAG).d("shouldOverrideUrlLoading: " + uri);
                }
                switch (uri.getScheme()) {
                    case "tel":
                        startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse(uri.toString())));
                        return true;
                    case "mailto":
                        startActivity(new Intent(Intent.ACTION_SEND).setType("message/rfc822"));
                        return true;
                    default:
                        if (header != null && header.size() > 0) {
                            view.loadUrl(uri.toString(), header);
                            return true;
                        } else {
                            return false;
                        }
                }
            }

            @Override
            public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
                super.onReceivedError(view, request, error);
                isError = true;
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                progressBar.setVisibility(View.GONE);
                if (!isError) {
                    webView.setVisibility(View.VISIBLE);
                }
            }
        });

Can you help me add this to my project?