My first Android application. This code is so rough it makes me cry.

Please see:

Jaeggi, S. M., Buschkuehl, M., Jonides, J., Perrig, W. J. (2008),
Improving fluid intelligence with training on working memory,
Proceedings of the National Academy of Sciences, vol. 105 no. 19

http://www.iapsych.com/articles/jaeggi2008.pdf