I'm designing the UI for an Android app taking the Google User Interface guidelines into account for my Android 4.0 phone. The current concept looks like this: How would I go about supporting this UI on older versions of Android? The tabs, ON/OFF switch buttons and other control styles are not available by default. Should I implement them myself? Is it acceptable to have a 4.0-like layout on older
![How to handle pre-4.0 versions of Android when designing a layout?](https://cdn-ak-scissors.b.st-hatena.com/image/square/9e78d81e7d3ee61c879959d4df42dbdd04d68bec/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fux%2FImg%2Fapple-touch-icon%402.png%3Fv%3D6891b06365c4)