Android 图像马赛克处理

自己写个小程序，需求图片转马赛克.

protected Bitmap mosic(Bitmap bitmap){        int bitWidth = bitmap.getWidth();        int bitHeight = bitmap.getHeight();        int mosicArea = 50;//马赛克范围                /*         * 第一版         * 逻辑：         * 如果mosicArea = 50         * 则第一个像素块 50*50范围内都用[0,0]的颜色，第二个像素块用 [50,0]的颜色 ，以此类推         * 实验了一下，效率不高，手机有点卡死的感觉，但最终还是出得来         */        for(int i=0;i<bitWidth;i++){            for(int j=0;j<bitHeight;j++){                int x = i/mosicArea * mosicArea;//整除后再定位需求的那个像素                int y = j/mosicArea * mosicArea;                int iPixel = bitmap.getPixel(x,y);                bitmap.setPixel(i, j, iPixel);            }        }        return bitmap;    }

class CustomView extends View{            //第二版        //利用 canvas        private Paint pPaint;            private Canvas cCanvas;        private Bitmap bPic;        private Rect rRect;                  public CustomView(Context context, Bitmap bitmap) {                super(context);                bPic = bitmap;            pPaint = new Paint();        }                      @Override            protected void onDraw(Canvas canvas) {                cCanvas = canvas;            this.drawMosic(200,200,200,200,5);        }                protected void drawMosic(int x, int y,int width,int height,int rect){            int currentPixel;            cCanvas.drawBitmap(bPic, 0, 0, null);                        int mosicWidth = (int)Math.ceil(width/rect);            int mosicHeight = (int)Math.ceil(height/rect);                        for(int i=0;i<mosicWidth;i++){                for(int j=0;j<mosicHeight;j++){                    currentPixel = bPic.getPixel(x+i*rect, y+j*rect);                    pPaint.setColor(currentPixel);                    rRect = new Rect(x+i*rect,y + j*rect,x+(i+1)*rect,y + (j+1)*rect);                    cCanvas.drawRect(rRect, pPaint);                }            }        }

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