How to restrict app to Phones only

Question

I'd like my app to be available only to phones as I'd like to build a different version for tablets. I didn't find any setting in the app xml put such a restriction.
Is this something that can be done through the app.xml file or is it something I should do in the Android market? The only thing I see on the Android Market is a Devices option but there are thousands of devices in that list and I have no idea about some of those devices to make a decision on whether to allow it on that device or not.

Answer 1

In the App Descriptor XML file use the following code to restrict to support screens:
<supports-screens
          android:smallScreens="true"
          android:normalScreens="true"
          android:largeScreens="false"
          android:xlargeScreens="false" />
You may want to read this as well to clarify on which screen sizes are what:
http://developer.android.com/guide/topics/manifest/supports-screens-element.html
For instance, I locked my app to tablets only by
<supports-screens
          android:smallScreens="false"
          android:normalScreens="false"
          android:largeScreens="false"
          android:xlargeScreens="true" />
In iOS devices you use:
<key>UIDeviceFamily</key>
                <array>
                    <string>2</string>
                </array>
Where the string is the value of the device type (2 being iPad only in this case)