Can't remove window title bar in Android

I am porting an iOS app to Android and after creating a new window and webview to browse Internet, the name of the app is at the top of the display. This only happens on Android. I don't know how to remove this bar across the top. Here is my code:

var window = Titanium.UI.createWindow();
 
var webview = Titanium.UI.createWebView({
       url : 'http://www.google.com'
});
 
window.add(webview);
 
window.open({
      modal : true
});