FILL_PARENT and MATCH_PARENT
<p>Right now I am using MATCH_PARENT all throughout my app.
I've decided to make the app available to Android 2.1 users but the MATCH_PARENT is not introduced till Android 2.2</p>

<p>How should I go about doing this if I want my app to use MATCH_PARENT when the Android version is 2.2 and above but use FILL_PARENT if it's 2.1 (or lower if I decide to open it to them later on)?</p>
