Google ,the internet giant is all set to unveil Android 2.1 a software development kit (SDK) for developers.The new sdk includes some API changes from the previous version of android.Some of the bugs of the previous version is also solved in android 2.1.The android 2.1 will be available for download which includes a fully compliant Android library and system image, as well as a set of emulator skins, sample applications, and more.But the downloadable version doesnot includes no external libraries.