通知中心位置上的LargeIcon设置| Android Kotlin

下面是我在通知中设置largeIcon的代码（如下图所示），但图标不能设置在图标视图的中心。我使用了下面的代码，但没有修复我的错误。提前谢谢

var mBuilder = NotificationCompat.Builder(this)
mBuilder.setLargeIcon(getCircleBitmap(it))

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private fun getCircleBitmap(bitmap: Bitmap): Bitmap {
    val output = Bitmap.createBitmap(96,96, Bitmap.Config.ARGB_8888)
    val canvas = Canvas(output)
    val color = Color.parseColor("#f1f2f5")
    val paint = Paint()
    val rect = Rect(0, 0, 96, 96)
    val rectF = RectF(rect)
    paint.isAntiAlias = true
    canvas.drawARGB(0, 0, 0, 0)
    paint.color = color
    canvas.drawOval(rectF, paint)
    paint.xfermode = PorterDuffXfermode(PorterDuff.Mode.SRC_IN)
    canvas.drawBitmap(bitmap, rect, rect, paint)
    bitmap.recycle()
    return output
}