TechnologyTopicsK54CA/Sudoku — pull request #11 by duclmk54ca (2012-04-22 04:39:45+00:00)
Title: Fixed PuzzleView input error "Force close"

The main reason why this happens is that you didn't initialize the "puzzleView" variable on Game.java. That's why you caught the exception "NullPointerException".
There are many other problems, see the code difference using Github and explain yourself.