Try this one:
public void alertcreate (View v){
Dialog webViewDialog;
webViewDialog = new Dialog(this);
webViewDialog.setContentView(R.layout.webviewdialog);
webView = (WebView) webViewDialog.findViewById(R.id.wb_webview);
webView.setScrollbarFadingEnabled(false);
webView.setHorizontalScrollBarEnabled(false);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setUserAgentString("AndroidWebView");
webView.clearCache(true);
webView.loadUrl("http://google.com");
webView.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return super.shouldOverrideUrlLoading(view, url);
}
});
}