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  • Android裁剪图片为圆形图片

    /**
         * 转换图片成圆形
         * @param bitmap 传入Bitmap对象
         * @return
         */
        public static Bitmap toRoundBitmap(Bitmap bitmap) {
            int width = bitmap.getWidth();
            int height = bitmap.getHeight();
            float roundPx;
            float left,top,right,bottom,dst_left,dst_top,dst_right,dst_bottom;
            if (width <= height) {
                    roundPx = width / 2;
                    top = 0;
                    bottom = width;
                    left = 0;
                    right = width;
                    height = width;
                    dst_left = 0;
                    dst_top = 0;
                    dst_right = width;
                    dst_bottom = width;
            } else {
                    roundPx = height / 2;
                    float clip = (width - height) / 2;
                    left = clip;
                    right = width - clip;
                    top = 0;
                    bottom = height;
                    width = height;
                    dst_left = 0;
                    dst_top = 0;
                    dst_right = height;
                    dst_bottom = height;
            }
             
            Bitmap output = Bitmap.createBitmap(width,
                            height, Config.ARGB_8888);
            Canvas canvas = new Canvas(output);
             
            final int color = 0xff424242;
            final Paint paint = new Paint();
            final Rect src = new Rect((int)left, (int)top, (int)right, (int)bottom);
            final Rect dst = new Rect((int)dst_left, (int)dst_top, (int)dst_right, (int)dst_bottom);
            final RectF rectF = new RectF(dst);
    
            paint.setAntiAlias(true);
             
            canvas.drawARGB(0, 0, 0, 0);
            paint.setColor(color);
            canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    
            paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
            canvas.drawBitmap(bitmap, src, dst, paint);
            return output;
        }

    相关文章地址:

    https://github.com/goodev/CropImageLib/blob/master/README.md

    http://blog.dreamtobe.cn/1307.html

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  • 原文地址:https://www.cnblogs.com/chaoyaximo/p/3307481.html
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