cordova android 重写webview onReceivedError

当没有网络时，加载网络资源，如 http://www.baidu.com/ 就会出现白色的页面；这是不希望出现的结果；所以希望能加载自己本地的HTML；

则需要重写 webview 的onReceivedError 方法，让它重新加载本地HTML；

super.appView.setWebViewClient(new CordovaWebViewClient(this, appView) {
            @Override
            public void onReceivedError(WebView view, int errorCode,
                    String description, String failingUrl) {
                Log.i("failerror  no no my ",
                        "http://www.baidu.com/  is erro ,please check your network ......");
                loadUrl(launchUrl);
                super.onReceivedError(view, errorCode, description, failingUrl);

            }
        });