Android 图片切割工具类

图片切割工具类

public class ImageSplitter  
{  
    /** 
     * 将图片切成 , 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;  
    }  
}

图片切割实体类：

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

使用方法：

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;  
            }  
        });  
    }