Android Cupcake
Android "Cupcake" is the third version of Android developed by Google, a major platform release deployable to Android-powered handsets starting in April 2009, that is no longer supported. The release included new features for users and developers, as well as changes in the Android framework API. For developers, the Android 1.5 platform was available as a downloadable component for the Android SDK.
Android 1.5 included new features such as an on-screen keyboard and Bluetooth support as well as improvements to existing features such as UI changes for application management and several Google apps.
