Question

我正在使用WebView来显示信息的项目中，我应该使用shouldInterceptRequest添加标头。一切正常，但是在更新chrome 76之后，它显示空白页，仅应调用InterceptRequest。

webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setDomStorageEnabled(true);
    webView.getSettings().setLoadWithOverviewMode(false);
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    webView.getSettings().setSupportMultipleWindows(true);
    webView.getSettings().setPluginState(WebSettings.PluginState.ON);
    webView.clearCache(true);
    webView.getSettings().setAppCacheEnabled(false);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        webView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
    }
    webView.setWebViewClient(new WebViewClient() {

        @TargetApi(Build.VERSION_CODES.LOLLIPOP)
        @Nullable
        @Override
        public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
            Log.d("TAG", "shouldInterceptRequest: 2");
            if (!checkFirstLoad) {
                try {
                    checkFirstLoad = true;
                    Request req;
                    OkHttpClient httpClient = new OkHttpClient();
                    req = new Request.Builder()
                            .url(PA_URL.trim())
                            .addHeader("Pa-Token", token)
                            .addHeader("Pa-Redirect", url)
                            .addHeader("Pa-App-Token", randomString())
                            .addHeader("Pa-App-Encrypt", md5(deviceId+oldToken)).build();

                    Response response = httpClient.newCall(req).execute();
                    return new WebResourceResponse(MimeTypeMap.getFileExtensionFromUrl(request.getUrl().toString()),
                            response.header("content-encoding", "utf-8"),
                            response.body().byteStream());
                } catch (IOException e) {
                    e.printStackTrace();
                    return null;
                }
            } else {
                return null;
            }
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            Log.d("TAG", "shouldOverrideUrlLoading: "+url);
            return true;
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            view.loadUrl(request.getUrl().toString());
            Log.d("TAG", "shouldOverrideUrlLoading: "+request.getUrl().toString());
            return true;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            progressBar.setVisibility(View.VISIBLE);
            Log.d("TAG", "onPageStarted: "+url);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            progressBar.setVisibility(View.GONE);
            Log.d("TAG", "onPageFinished: "+url);
        }

        @Override
        public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
            super.onReceivedSslError(view, handler, error);
            handler.proceed();
            Log.d("TAG", "onReceivedError: "+error);
        }

        @Override
        public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
            super.onReceivedError(view, request, error);
            progressBar.setVisibility(View.GONE);
            Log.d("TAG", "onReceivedError: "+error);
        }

        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);
            progressBar.setVisibility(View.GONE);
            Log.d("TAG", "onReceivedError: "+ description);
        }
    });

    webView.loadUrl(url);

我尝试了一些解决方案：this，this，但没有用。我该怎么解决？

Answer 1

它不适用于 POST 请求，因为WebResourceRequest不提供 POST 数据。 This是一个类，在完整的浏览器中支持多种 HTTP 请求。

Answer 2

我也面临这个问题。发生这种情况的原因是您已启用dom存储。.从chrome清除缓存并清除应用数据，卸载并再次运行。.在我看来，它是一种魅力。

Webview在更新Chrome 76后显示空白页

2 个答案: