如何在Android中从位图裁剪圆形区域

经过长时间的头脑风暴，我找到了解决方案

public Bitmap getCroppedBitmap(Bitmap bitmap) {    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);    Canvas canvas = new Canvas(output);    final int color = 0xff424242;    final Paint paint = new Paint();    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());    paint.setAntiAlias(true);    canvas.drawARGB(0, 0, 0, 0);    paint.setColor(color);    // canvas.drawRoundRect(rectF, roundPx, roundPx, paint);    canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));    canvas.drawBitmap(bitmap, rect, rect, paint);    //Bitmap _bmp = Bitmap.createScaledBitmap(output, 60, 60, false);    //return _bmp;    return output;}