android - 检测 Webview 错误并显示消息

Question

我想在加载 web View 页面时显示错误消息(无连接)。这是我目前所拥有的，没有错误处理代码:

public class TrackerPage extends Activity {

    // @Override
    private WebView webview;
    private ProgressDialog progressDialog;

    private boolean error;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Get rid of the android title bar
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        // Set the XML layout
        setContentView(R.layout.tracker_page);

        // Bundle objectbundle = this.getIntent().getExtras();
        webview = (WebView) findViewById(R.id.tracker);

        final Activity activity = this;

        // Enable JavaScript and lets the browser go back
        webview.getSettings().setJavaScriptEnabled(true);
        webview.canGoBack();

        webview.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }

            public void onLoadResource(WebView view, String url) {
                // Check to see if there is a progress dialog
                if (progressDialog == null) {
                    // If no progress dialog, make one and set message
                    progressDialog = new ProgressDialog(activity);
                    progressDialog.setMessage("Loading please wait...");
                    progressDialog.show();

                    // Hide the webview while loading
                    webview.setEnabled(false);
                }
            }

            public void onPageFinished(WebView view, String url) {
                // Page is done loading;
                // hide the progress dialog and show the webview
                if (progressDialog.isShowing()) {
                    progressDialog.dismiss();
                    progressDialog = null;
                    webview.setEnabled(true);
                }
            }

        });

        // The URL that webview is loading
        webview.loadUrl("http://url.org/");
    }
}

我该怎么做？

Answer 1

以上所有答案均已弃用。您应该在页面完成后使用此代码

 @Override
    public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error){
           //Your code to do
        Toast.makeText(getActivity(), "Your Internet Connection May not be active Or " + error.getDescription(), Toast.LENGTH_LONG).show();
    }