I have faced a memory leaking issue in android. I have checked profiler, it shows the native memory increasing at a high rate over time.

我在安卓系统中遇到了内存泄漏问题。我检查了profiler，它显示本机内存随着时间的推移以高速增长。

After checking a little bit time I found I am converting a proxyImage to bitmap image and those bitmap image doesn't destroy properly. The following code snippet I used to convert proxyImage to Bitmap image. The reason behind the converting proxyImage to bitmap image is that I want to show the converted image on the jetpack canvas. Please help me to get rid of this stuff or show me an efficient way so that I can show the imageProxy on canvas in jetpack compose. Thanks in advance.

经过一点时间的检查，我发现我正在将proxyImage转换为位图图像，而这些位图图像没有正确销毁。以下代码片段用于将proxyImage转换为位图图像。将proxyImage转换为位图图像的原因是我想在jetpack画布上显示转换后的图像。请帮我去掉这些东西，或者向我展示一种有效的方法，这样我就可以在jetpack compose中在画布上显示imageProxy。提前谢谢。

/**
 * Utils functions for bitmap conversions.
 */
object BitmapUtils {
    /**
     * Converts NV21 format byte buffer to bitmap.
     */
    fun getBitmap(data: ByteBuffer, metadata: FrameMetadata, isFlip: Boolean): Bitmap? {
        data.rewind()
        val imageInBuffer = ByteArray(data.limit())
        data[imageInBuffer, 0, imageInBuffer.size]
        try {
            val image = YuvImage(
                imageInBuffer, ImageFormat.NV21, metadata.width, metadata.height, null
            )
            val stream = ByteArrayOutputStream()
            image.compressToJpeg(Rect(0, 0, metadata.width, metadata.height), 80, stream)
            val bmp = BitmapFactory.decodeByteArray(stream.toByteArray(), 0, stream.size())
            stream.close()
            return rotateBitmap(bmp, metadata.rotation, flipX = isFlip, flipY = false)
        } catch (e: Exception) {
            Log.e("VisionProcessorBase", "Error: " + e.message)
        }
        return null
    }

    /**
     * Converts a YUV_420_888 image from CameraX API to a bitmap.
     */
    @ExperimentalGetImage
    fun getBitmap(image: ImageProxy, isFlip: Boolean): Bitmap? {
        val frameMetadata: FrameMetadata = FrameMetadata.Builder()
            .setWidth(image.width)
            .setHeight(image.height)
            .setRotation(image.imageInfo.rotationDegrees)
            .build()
        val nv21Buffer = yuv420ThreePlanesToNV21(
            image.image!!.planes, image.width, image.height
        )
        return getBitmap(nv21Buffer, frameMetadata, isFlip)
    }

    /**
     * Rotates a bitmap if it is converted from a bytebuffer.
     */
    private fun rotateBitmap(
        bitmap: Bitmap,
        rotationDegrees: Int,
        flipX: Boolean,
        flipY: Boolean
    ): Bitmap {
        val matrix = Matrix()

        // Rotate the image back to straight.
        matrix.postRotate(rotationDegrees.toFloat())

        // Mirror the image along the X or Y axis.
        matrix.postScale(if (flipX) -1.0f else 1.0f, if (flipY) -1.0f else 1.0f)
        val rotatedBitmap =
            Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)

        // Recycle the old bitmap if it has changed.
        if (rotatedBitmap != bitmap) {
            bitmap.recycle()
        }
        return rotatedBitmap
    }

    /**
     * Converts YUV_420_888 to NV21 bytebuffer.
     *
     *
     * The NV21 format consists of a single byte array containing the Y, U and V values. For an
     * image of size S, the first S positions of the array contain all the Y values. The remaining
     * positions contain interleaved V and U values. U and V are subSampled by a factor of 2 in both
     * dimensions, so there are S/4 U values and S/4 V values. In summary, the NV21 array will contain
     * S Y values followed by S/4 VU values: YYYYYYYYYYYYYY(...)YVUVUVUVU(...)VU
     *
     *
     * YUV_420_888 is a generic format that can describe any YUV image where U and V are subSampled
     * by a factor of 2 in both dimensions. [Image.getPlanes returns an array with the Y, U and
     * V planes. The Y plane is guaranteed not to be interleaved, so we can just copy its values into
     * the first part of the NV21 array. The U and V planes may already have the representation in the
     * NV21 format. This happens if the planes share the same buffer, the V buffer is one position
     * before the U buffer and the planes have a pixelStride of 2. If this is case, we can just copy
     * them to the NV21 array.
     */
    private fun yuv420ThreePlanesToNV21(
        yuv420888planes: Array<Plane>, width: Int, height: Int
    ): ByteBuffer {
        val imageSize = width * height
        val out = ByteArray(imageSize + 2 * (imageSize / 4))
        if (areUVPlanesNV21(yuv420888planes, width, height)) {
            // Copy the Y values.
            yuv420888planes[0].buffer[out, 0, imageSize]
            val uBuffer = yuv420888planes[1].buffer
            val vBuffer = yuv420888planes[2].buffer
            // Get the first V value from the V buffer, since the U buffer does not contain it.
            vBuffer[out, imageSize, 1]
            // Copy the first U value and the remaining VU values from the U buffer.
            uBuffer[out, imageSize + 1, 2 * imageSize / 4 - 1]
        } else {
            // Fallback to copying the UV values one by one, which is slower but also works.
            // Unpack Y.
            unpackPlane(
                yuv420888planes[0], width, height, out, 0, 1
            )
            // Unpack U.
            unpackPlane(
                yuv420888planes[1], width, height, out, imageSize + 1, 2
            )
            // Unpack V.
            unpackPlane(
                yuv420888planes[2], width, height, out, imageSize, 2
            )
        }
        return ByteBuffer.wrap(out)
    }

    /**
     * Checks if the UV plane buffers of a YUV_420_888 image are in the NV21 format.
     */
    private fun areUVPlanesNV21(planes: Array<Plane>, width: Int, height: Int): Boolean {
        val imageSize = width * height
        val uBuffer = planes[1].buffer
        val vBuffer = planes[2].buffer

        // Backup buffer properties.
        val vBufferPosition = vBuffer.position()
        val uBufferLimit = uBuffer.limit()

        // Advance the V buffer by 1 byte, since the U buffer will not contain the first V value.
        vBuffer.position(vBufferPosition + 1)
        // Chop off the last byte of the U buffer, since the V buffer will not contain the last U value.
        uBuffer.limit(uBufferLimit - 1)

        // Check that the buffers are equal and have the expected number of elements.
        val areNV21 =
            vBuffer.remaining() == 2 * imageSize / 4 - 2 && vBuffer.compareTo(uBuffer) == 0

        // Restore buffers to their initial state.
        vBuffer.position(vBufferPosition)
        uBuffer.limit(uBufferLimit)
        return areNV21
    }

    /**
     * Unpack an image plane into a byte array.
     *
     *
     * The input plane data will be copied in 'out', starting at 'offset' and every pixel will be
     * spaced by 'pixelStride'. Note that there is no row padding on the output.
     */
    private fun unpackPlane(
        plane: Plane, width: Int, height: Int, out: ByteArray, offset: Int, pixelStride: Int
    ) {
        val buffer = plane.buffer
        buffer.rewind()

        // Compute the size of the current plane.
        // We assume that it has the aspect ratio as the original image.
        val numRow = (buffer.limit() + plane.rowStride - 1) / plane.rowStride
        if (numRow == 0) {
            return
        }
        val scaleFactor = height / numRow
        val numCol = width / scaleFactor

        // Extract the data in the output buffer.
        var outputPos = offset
        var rowStart = 0
        for (row in 0 until numRow) {
            var inputPos = rowStart
            for (col in 0 until numCol) {
                out[outputPos] = buffer[inputPos]
                outputPos += pixelStride
                inputPos += plane.pixelStride
            }
            rowStart += plane.rowStride
        }
    }
}

Edited: I have used bitmap?.asImageBitmap() to convert ImageBitmap type. It may cause the memory leaking. But what will be the overall solution?

编辑：我用过位图？。asImageBitmap（）转换ImageBitmap类型。这可能会导致内存泄漏。但总体解决方案是什么？