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我想在 Canvas 中填充颜色，这是我的代码:
Bitmap bitMap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
bitMap = bitMap.copy(bitMap.getConfig(), true);
Canvas canvas = new Canvas(bitMap);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(4.5f);
canvas.drawCircle(50, 50, 30, paint);
这段代码制作了一个带有边框颜色的圆圈。如何用颜色填充圆圈？