Question

我想显示一个progressBar，直到所有资源都加载完毕。我已经尝试过下面的代码，但是当资源开始加载时，progressBar将消失。

dataBinding.webviewGallery.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (!loadingFinished) {
                redirect = true;
            }
            return false;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            loadingFinished = false;
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            if (!redirect) {
                loadingFinished = true;
            }

            if (loadingFinished && !redirect && !loadingError) {
                dataBinding.progressBar.setVisibility(View.GONE);
            } else {
                redirect = false;
            }
        }

        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);
            dataBinding.progressBar.setVisibility(View.GONE);
            loadingError = true;
            Toast.makeText(requireActivity(), "Failed to load URL. Please try again later.", Toast.LENGTH_SHORT).show();
            goHome();
        }
    });

我也尝试了WebChromeClient，但它也无法正常工作。

dataBinding.webviewGallery.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                super.onProgressChanged(view, newProgress);
                dataBinding.progressbarWebpage.setProgress(newProgress);
                if(newProgress==100){
                    dataBinding.progressbarWebpage.setVisibility(View.GONE);
                }
            }
        });

是否有正确的方法来查找URL何时完全加载？ TIA

Answer 1

出现问题的原因是因为您正在onProgressChanged（）上编写代码。只要进度发生变化，该函数就会执行。在您的情况下，进度的初始值为0，因为进度尚未开始。当进度开始时，即进度值更改时，函数将执行，因此进度消失了。解决方案：使用onprogresscompleted（）函数添加进度逻辑。

Answer 2

  binding.webView.setWebChromeClient(new WebChromeClient() {
        public void onProgressChanged(WebView view, int progress) {
            if (progress == 100)
                binding.progress.setVisibility(View.GONE);
            else
                binding.progress.setProgress(progress);
        }
    });

检查网址是否已完全加载Webview

2 个答案: