public class ImageSplitter
{
  /**
   * 將圖片切成 , piece *piece
   *
   * @param bitmap
   * @param piece
   * @return
   */
  public static List<ImagePiece> split(Bitmap bitmap, int piece)
  {
    List<ImagePiece> pieces = new ArrayList<ImagePiece>(piece * piece);
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    Log.e("TAG", "bitmap Width = " + width + " , height = " + height);
    int pieceWidth = Math.min(width, height) / piece;
    for (int i = 0; i < piece; i++)
    {
      for (int j = 0; j < piece; j++)
      {
        ImagePiece imagePiece = new ImagePiece();
        imagePiece.index = j + i * piece;
        int xValue = j * pieceWidth;
        int yValue = i * pieceWidth;
        imagePiece.bitmap = Bitmap.createBitmap(bitmap, xValue, yValue,
            pieceWidth, pieceWidth);
        pieces.add(imagePiece);
      }
    }
    return pieces;
  }
}

public class ImagePiece
{
  public int index = 0;
  public Bitmap bitmap = null;
}

private void initBitmap()
{
    if (mBitmap == null)
      mBitmap = BitmapFactory.decodeResource(getResources(),
          R.drawable.aa);
    List<ImagePiece> mItemBitmaps = ImageSplitter.split(mBitmap, mColumn);
    Collections.sort(mItemBitmaps, new Comparator<ImagePiece>()
    {
      @Override
      public int compare(ImagePiece lhs, ImagePiece rhs)
      {
        return Math.random() > 0.5 ? 1 : -1;
      }
    });
}