为什么MLKIT中的“检测人脸”会导致内存泄漏?

BarCode DetectFace 检测条形码或人脸。但我有一个问题,当我使用内存泄漏 .

条形码

override fun onImageAvailable(reader: ImageReader) {
        imageOnFrame = reader.acquireNextImage()
        barcode = BarCode(this@MainActivity, imageOnFrame, getRotation("0"))
        barcode!!.run()
        barcode = null
        imageOnFrame.close()
    }

探测面 ,这会导致内存泄漏:

override fun onImageAvailable(reader: ImageReader) {
        imageOnFrame = reader.acquireNextImage()
        detectFace = DetectFace(this@MainActivity, imageOnFrame, getRotation("0"))
        detectFace!!.run()
        detectFace = null  
        imageOnFrame.close()
    }

这是课堂 :

class DetectFace(private val context: Context, private val image: Image, private val rotation: Int) {

    private val option = FirebaseVisionFaceDetectorOptions.Builder()
            .setModeType(FirebaseVisionFaceDetectorOptions.ACCURATE_MODE)
            .setLandmarkType(FirebaseVisionFaceDetectorOptions.ALL_LANDMARKS)
            .setClassificationType(FirebaseVisionFaceDetectorOptions.ALL_CLASSIFICATIONS)
            .setTrackingEnabled(true)
            .setMinFaceSize(0.01f)
            .build()

    fun run(){
        val image = FirebaseVisionImage.fromMediaImage(this.image, rotation)
        val detector = FirebaseVision.getInstance()
                .getVisionFaceDetector(option)

        detector.detectInImage(image)
                .addOnSuccessListener {
                    // code ..
                }
                .addOnFailureListener{
                    // code ..
                }
        this.image.close()
    }
}