surface for openCV with Android: already connected

I'm trying to connect my Android app with the OpenCV library and I need to use a native camera for have more control of the camera options. For do it I have found http://nezarobot.blogspot.it/2016/03/android-surfacetexture-camera2-opencv.html, that is what I need. My problem is that if I use this code, with some small change and when I launch it, my app crash with 3 errors reported:

• E/BufferQueueProducer: [SurfaceTexture-0-31525-0] connect(P): already connected (cur=4 req=2)
• D/PlateNumberDetection/DetectionBasedTracker: ANativeWindow_lock failed with error code -22
• A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x315e9858 in tid 31735 (CameraBackgroun)

I have tried to close the camera before the jni call and I can capture and show only the first frame, but then I need to restart the camera and I can't create the same thread by itself.

Here I take the frame and I send to NDK.

private final ImageReader.OnImageAvailableListener mOnImageAvailableListener
        = new ImageReader.OnImageAvailableListener() {

    @Override
    public void onImageAvailable(ImageReader reader) {

        Image image;

        try {
            image = reader.acquireLatestImage();
            if( image == null) {
                return;
            }



            if (image.getFormat() != ImageFormat.YUV_420_888) {
                throw new IllegalArgumentException("image must have format YUV_420_888.");
            }

            Image.Plane[] planes = image.getPlanes();

            if (planes[1].getPixelStride() != 1 && planes[1].getPixelStride() != 2) {
                throw new IllegalArgumentException(
                        "src chroma plane must have a pixel stride of 1 or 2: got "
                                + planes[1].getPixelStride());
            }

            mNativeDetector.detect(image.getWidth(), image.getHeight(), planes[0].getBuffer(), surface);


        } catch (IllegalStateException e) {
            Log.e(TAG, "Too many images queued for saving, dropping image for request: ", e);
            return;
        }
        image.close();
    }
};

and here I manage the camera preview

protected void createCameraPreview() {
    try {
        SurfaceTexture texture = textureView.getSurfaceTexture();
        assert texture != null;
        texture.setDefaultBufferSize(imageDimension.getWidth(), imageDimension.getHeight());
        surface = new Surface(texture);
        captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        captureRequestBuilder.addTarget(mImageReader.get().getSurface());

        BlockingSessionCallback sessionCallback = new BlockingSessionCallback();

        List<Surface> outputSurfaces = new ArrayList<>();
        outputSurfaces.add(mImageReader.get().getSurface());
        outputSurfaces.add(new Surface(textureView.getSurfaceTexture()));

        cameraDevice.createCaptureSession(outputSurfaces, sessionCallback, mBackgroundHandler);

        try {
            Log.d(TAG, "waiting on session.");
            cameraCaptureSessions = sessionCallback.waitAndGetSession(SESSION_WAIT_TIMEOUT_MS);
            try {
                captureRequestBuilder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);


                Log.d(TAG, "setting repeating request");

                cameraCaptureSessions.setRepeatingRequest(captureRequestBuilder.build(),
                        mCaptureCallback, mBackgrounHandler);
            } catch (CameraAccessException e) {
                e.printStackTrace();
            }
        } catch (TimeoutRuntimeException e) {
            Toast.makeText(AydaMainActivity.this, "Failed to configure capture session.", Toast.LENGTH_SHORT);
        }

    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}