Dubbed Android 0.9 SDK, the developer kit is set to be the last 'beta' version of the SDK before the final Android 1.0 kit is released along with the first Android handsets in the fourth quarter of the year.
Along with the ever-present API and bug fixes, the update includes a new home screen and several UI tweaks. Developers will also be given access to new messaging apps, picture viewers and music players, as well as alarm clock, calculator and camera software apps.
The new SDK also removes the Bluetooth API and GTalkService features for what Google calls 'security reasons.'
"We've been working with our Open Handset Alliance partners to incorporate much of that feedback, and finish the first devices," Android developer advocate Dan Morrill said in a blog posting.
"Since those devices are shipping in the fourth quarter, the platform is now converging on a final 'Android 1.0' version.
The company has also posted a roadmap for Android development. The plan calls for the release of Android 1.0 some time this Fall, followed shortly by the first handsets.
Among the first Android phones will be the HTC Dream, which will reportedly launch in the US with T-Mobile.