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If you're new to Android app development, this where you should begin. This series of lessons shows you how to create a new project, build a simple app, and run it on a device or emulator.
L. Roalter, A. Möller, S. Diewald, and M. Kranz. Proceedings of the 7th International Conference on Intelligent Environments (IE), page 214--221. (July 2011)