WebView webView = (WebView) activity.findViewById(R.id.web1);
if (webView.getUrl() == null) {
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().supportMultipleWindows();
    webView.setWebViewClient(new WebViewClient());
    webView.setWebChromeClient(new WebChromeClient());
    webView.loadUrl("http://www.baidu.com/");
}