If you are developing enterprise applications you may need to handle windows authentication from mobile devices. Windows authentication (formerly named NTLM, and also referred to as Windows NT Challenge/Response authentication) is a secure form of authentication because the user name and password are hashed before being sent across the network. Here is the snippet which helps to handle windows authentication in Android.

webView = (WebView) findViewById(R.id.webView1);
webView.setWebViewClient(new WebViewClient() {
	@Override
	public void onReceivedHttpAuthRequest(WebView view,
			HttpAuthHandler handler, String host, String realm) {
		handler.proceed("DOMAIN\\username", "password");
	}

});

webView.loadUrl("URL");

Happy Programming :)