I am using responsive design in my apps, so I can confirm it does work, although this is not specific to the Icenium product, rather to the JS framework you're using for your app. In mine I am counting on Kendo Mobile. It handles a lot of the cross platform/device compatibility issues and you can just customize on top of it. Read this
blog post about designing an app for tablets and phones. Here
is an article on Responsive Design.
In general more info is required in order to troubleshoot any problem e.g. what is the Android device and Android version you test on, have you tried more than one device? Additionally, does it run if you save it as regular html file and open it directly from the Android browser? If not, how do you expect it to work anywhere else?