我正在创建使用WebView访问在线网站的应用程序.我被困在我必须添加代码以检查页面可用性的地方.
public class SpartanWeb extends Activity {
WebView mWebView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Adds ProgRSS bar Support
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
// Makes Progress bar Visible
getWindow().setFeatureInt(Window.FEATURE_PROGRESS,Window.PROGRESS_VISIBILITY_ON);
// Get Web view
mWebView = (WebView) findViewById(R.id.webView1);
WebSettings websettings = mWebView.getSettings();
websettings.setJavaScriptEnabled(true);
mWebView.stopLoading();
mWebView.clearCache(true);
mWebView.loadUrl("http://google.com");
mWebView.setHorizontalScrollBarEnabled(false);
mWebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
mWebView.setWebViewClient(new WebViewClient());
mWebView.setDownloadListener(new DownloadListener() {
public void onDownloadStart(String url,String userAgent,String contentDisposition,String mimetype,long contentLength) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse(url));
startActivity(intent);
}
});
// onProgressChanged
final Activity MyActivity = this;
mWebView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view,int progress) {
// bar disappear after URL is loaded,and changes string to
// Loading...
MyActivity.setTitle("Loading...");
MyActivity.setProgress(progress * 100); // Make the bar
// disappear after URL
// is loaded
// Return the app name after finish loading
if (progress == 100)
MyActivity.setTitle(R.string.app_name);
}
});
}// EOM oc
public boolean onKeyDown(int keyCode,KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode,event);
}
}
我试图添加onReceivedError但由于某种原因自定义页面没有加载.
/** Called when the activity is first created. */
public void onReceivedError(WebView view,int errorCode,String description,String failingUrl)
{
mWebView.loadUrl("file:///android_asset/error.html");
}
请告知该怎么做.
解决方法
您可以在onReceivedError函数中调用loadErrorPage(view)函数.
以下代码将加载您需要显示的错误内容.这里我使用loadDataWithBaseURL加载html文件.
public void loadErrorPage(WebView webview){
if(webview!=null){
String htmlData ="<html><body><div align=\"center\" >"This is the description for the load fail : "+description+"\nThe Failed url is : "+failingUrl+"\n"</div></body>";
webview.loadUrl("about:blank");
webview.loadDataWithBaseURL(null,htmlData,"text/html","UTF-8",null);
webview.invalidate();
}
}
