bilibili.java 文件源码

private Bitmap getCircleBitmap(final int radius)
{
       final Bitmap output = Bitmap.createBitmap(originBitmap.getWidth(), originBitmap.getHeight(), Bitmap.Config.ARGB_8888);
       final Canvas canvas = new Canvas(output);
       final Paint paint = new Paint();
       final Rect rect = new Rect((int)(x - radius), (int)(y - radius), (int)(x + radius), (int)(y + radius));

       paint.setAntiAlias(true);
       canvas.drawARGB(0, 0, 0, 0);
       canvas.drawCircle(x, y, radius, paint);

       paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
       canvas.drawBitmap(originBitmap, rect, rect, paint);

       return output;
   }