As first Honeycomb tablets are hitting store selveds and the SDK has been out for few weeks Google has been busy updating their documentation for the new OS version.
The Android Dev Guide is massive. Not everybody have time to go through all of it or even just the new posts (tagged with new! -tag). So I've gathered here a quick overview about the technical documentation for Android UI development and design. I hope this overview gives designers decent understanding about what is now possible and developers an overview of what they should study.
Fragments
Fragments are pieces of an activity that can be shown either one by one or as a composite screen.
Fragments is probably the most significant new feature in 3.0. Fragments enables us to write applications that can adapt into very different screen sizes and provide best possible user experience to users whether they're on a tablet or a phone.
Note: Fragments are now available as a static library that can be included in projects for Android 1.6+. For more info see this post in the Android Developers Blog
A good example for use of fragments is an email application. With fragments it is possible to make emails appear next to the list of emails on tablets but on smaller displays still opening the emails full screen.
Read more: Android UI design blog