“Third-party Android application developers can now use Google’s
Fragments API, part of Honeycomb or Android 3.0, without
sacrificing backwards compatibility with existing Android
smartphones. Google is trying to mitigate some of the fragmentation
issues plaguing its mobile Linux platform by expanding its
Fragments API to allow developers to create mobile apps that scale
across a variety of screen sizes, namely tablets and
smartphones.“Prior to the tablet-optimized Android 3.0 or Honeycomb release,
the Android Fragment APIs were not natively backwards compatible
with previous versions of the Android operating system.”