Question

我正在尝试拦截并停止在webView上加载所有mp4视频，因为我正在使用shouldInterceptRequest。我能够拦截视频，对于ex：，显示一个对话框，但是，我无法停止加载它们，任何想法为什么？

webView.setWebViewClient(new WebViewClient() {
       @SuppressWarnings("deprecation")
            @Override
        public WebResourceResponse shouldInterceptRequest(final WebView view, String url) {
    try { 
        if (url.contains(".mp4?")) {

    return getResponseData();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return super.shouldInterceptRequest(view, url);
        }

        private WebResourceResponse getResponseData() {
    try {
        String str = "Access Denied";
        InputStream data = new ByteArrayInputStream(str.getBytes("UTF-8"));
        return new WebResourceResponse("text/css", "UTF-8", data);
    } catch (IOException e) {
        return null;
    }
        }

Answer 1

这可能会对您有所帮助：

@Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
    if (yourCondition) {
        Handler handler = new Handler(getMainLooper());
        handler.post(new Runnable() {
            @Override
            public void run() {
                YourwebView.stopLoading();
                YourwebView.doAnythingYouWant();
            }
        });
    }
    return super.shouldInterceptRequest(view, request);
}

我创建了线程，因为A WebView method ( that is stopLoading() ) can't be called on a currently running thread and that thread is 'Chrome_FileThread'。

另外，请getMainLooper()获取In above situation we can't create handler inside thread that has not called Looper.prepare()。

希望这有帮助。

Answer 2

如果您的HTML页面不显示mp4内容或处理无效内容，则只需将一些虚拟InputStream传递给WebResourceResponse，如下所示。

my_webview.webViewClient = object : WebViewClient() {
    override fun shouldInterceptRequest(view: WebView?, request: WebResourceRequest?): WebResourceResponse? {
        if (request?.url?.contains(".mp4") == true) {
            val inputStream = "".byteInputStream(Charset.defaultCharset())
            return WebResourceResponse("image/png", "UTF-8", inputStream)
        } else {
            return super.shouldInterceptRequest(view, request)
        }
    }
}

Answer 3

你想要的方法是我想的那个

webView.setWebViewClient(new WebViewClient(){
  @Override
   public boolean shouldOverrideUrlLoading(WebView view, String url) {
               // code goes here
    }
});

Android webView shouldInterceptRequest - 停止加载资源

3 个答案: