Android：WebView loadDataWithBaseURL 不显示验证码图像

发布于 2024-12-02 06:58:19 字数 1438 浏览 5 评论 0 原文

我试图在应用程序的 WebView 中显示验证码 jpeg 图像（由 Java servlet 动态生成），但是，它有时会显示蓝色问号而不是验证码图像。下面是我在扩展 WebViewClient 的 MyWebViewClient 类的 shouldOverrideUrlLoading(WebView view, String url) 方法中的内容

我在我的 WebViewClient 中启用了互联网访问明显，并且该问题出现的时间约为 80%。即有时图像确实显示正确，但非常罕见。

这里还有另一个类似的问题 Image with Dynamic src Loads in Android browser, but not in Webview，但确实似乎没有明确的答案。

提前致谢

try
            {
                CookieSyncManager.getInstance().sync();
                Log.v("Hello","CookieStore: " + httpClient.getCookieStore().toString());
                HttpResponse response = httpClient.execute(httppost);
                data = new BasicResponseHandler().handleResponse(response);
                view.loadDataWithBaseURL(URL.toString(), data, "text/html", "UTF-8" , null);
                //Log.v("Hello","Data: " + data.toString());
            }
            catch (ClientProtocolException e)
            {  
                Log.v("Hello","ClientProtocolException:Overriding");
                Log.v("Hello",e.toString());
                e.printStackTrace();    
            } 
            catch (IOException e) 
            {   
                Log.v("Hello","IOException:Overriding");
                Log.v("Hello",e.toString());
                e.printStackTrace();  
            }

原文

I am trying to display a captcha jpeg image (which is generated dynamically by a Java servlet) in my application's WebView, however, it will sometimes display a blue question mark instead of the captcha image. Below is what I have in my shouldOverrideUrlLoading(WebView view, String url) method of MyWebViewClient class that extends WebViewClient

I have internet access enabled in my manifest and the problem occurs for about 80% of the time. i.e. Sometimes the image does show up correctly but very rare though.

There was another similar question here Image with dynamic src loads in Android browser, but not in Webview, but does not seem to have a definitive answer.

Thanks in advance

try
            {
                CookieSyncManager.getInstance().sync();
                Log.v("Hello","CookieStore: " + httpClient.getCookieStore().toString());
                HttpResponse response = httpClient.execute(httppost);
                data = new BasicResponseHandler().handleResponse(response);
                view.loadDataWithBaseURL(URL.toString(), data, "text/html", "UTF-8" , null);
                //Log.v("Hello","Data: " + data.toString());
            }
            catch (ClientProtocolException e)
            {  
                Log.v("Hello","ClientProtocolException:Overriding");
                Log.v("Hello",e.toString());
                e.printStackTrace();    
            } 
            catch (IOException e) 
            {   
                Log.v("Hello","IOException:Overriding");
                Log.v("Hello",e.toString());
                e.printStackTrace();  
            }

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