3

我正在使用以下代码在 android webview 中加载 url

webviewShowPost.loadUrl(URL);

我想检查是否没有可用的数据连接然后 webview 而不是显示空白视图，我可以显示没有连接的 Toast。

谢谢

4

5 回答 5

8

请试试这个

webView.setWebViewClient(new WebViewClient() { 
        @Override
        public void onReceivedError(WebView view, int errorCode,
                String description, String failingUrl) {
            // TODO Auto-generated method stub
            super.onReceivedError(view, errorCode, description, failingUrl);
        }
        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);
        }


    });
于 2011-12-02T07:01:04.530 回答
2 
public static boolean isOnline(Context context) {

        try {
            ConnectivityManager cm = (ConnectivityManager) context

            .getSystemService(Context.CONNECTIVITY_SERVICE);

            if (cm.getActiveNetworkInfo().isConnectedOrConnecting()) {

                URL url = new URL("http://www.google.com.pk/");
                                HttpURLConnection urlc = (HttpURLConnection) url
                        .openConnection();
                urlc.setConnectTimeout(1000); // mTimeout is in seconds

                urlc.connect();

                if (urlc.getResponseCode() == 200) {
                    return true;
                } else {
                    return false;
                }
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return false;
    }
于 2011-12-02T06:48:44.717 回答
2

您可以在上述 webview 方法中获取进度百分比值

 mWebView.setWebChromeClient(new WebChromeClient() {
        public void onProgressChanged(WebView view, int progress)  
        {
         //Make the bar disappear after URL is loaded, and changes string to Loading...
     //Make the bar disappear after URL is loaded
         System.out.println("Value of progress"+progress);
            pbweb.setProgress(progress);

            if(progress == 100)


            pbweb.setVisibility(View.GONE);
          }
        });

以下正在进行的代码是进步的价值

于 2011-12-02T06:58:05.943 回答
0

您想在加载页面之前检查是否有网络连接，这意味着您要这样做：https ://stackoverflow.com/a/2001824/960048

于 2011-12-02T06:50:01.477 回答
0

为此，您始终可以使用 WebViewClient。

    web.setWebViewClient(new WebViewClient(){

         public void onReceivedError(WebView view, int errorCode, String description,String failingUrl) {
             Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
         }
    });
于 2011-12-02T06:56:56.980 回答