Android kotlin 对拍照进行高斯模糊

private lateinit var mCamera: Camera //SurfaceView相机

 /**
     * 背景获取
     */
    fun takeScreenShot(gHandler: Handler){
        val callback: Camera.PictureCallback = object : Camera.PictureCallback {
            private lateinit var scaledBitmap: Bitmap
            override fun onPictureTaken(data: ByteArray, Camera: Camera) {
//                cameraTopRectView.draw(Canvas())
                try {
                    scaledBitmap = BitmapFactory.decodeByteArray(data, 0, data.size)// 获得图片
                    val msg = Message()
                    //对照片进行高斯模糊,最大为25f
                    msg.obj = blur(mContext,scaledBitmap,20f)
                    msg.what = MESSAGE_PHOTO_ALBUM
                    gHandler.sendMessage(msg)
                    scaledBitmap.recycle() // 回收bitmap空间
                    mCamera.startPreview()//摄像头预览打开
                } catch (e: Exception) {
                    e.printStackTrace()
                } finally {