@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate");
int diff = getIntent().getIntExtra(KEY_DIFFICULTY, DIFFUCULTY_EASY);
// puzzle = getPuzzle(diff);
// calculateUsedTiles();
puzzleView = new PuzzleView(this);
setContentView(puzzleView);
puzzleView.requestFocus();
}
/** Return the chosen tile to the caller */
private void returnResult(int tile) {
puzzleView.setSelectedTile(tile);
dismiss();
}