如何使用Camera X库在捕获图像后自动旋转图像?

我是使用X相机库的新手。我试着跟随谷歌的代码实验室 here

我可以显示预览并捕获图像。但问题是。。。。。。

当我在风景中捕捉图像时,图像结果将仍然是肖像。我想让它自动旋转。如果我在风景中拍摄图像,那么结果应该是风景,如果我在肖像中拍摄,那么结果也应该是肖像。就像“相机”应用程序中的相机

怎么做?

我使用的是红米Note 7和安卓10。

我使用的刻度:

implementation "androidx.camera:camera-camera2:1.0.0-beta11"
implementation "androidx.camera:camera-lifecycle:1.0.0-beta11"
implementation "androidx.camera:camera-view:1.0.0-alpha18"

这是我用来显示预览和捕获图像的代码

class CameraFragment : Fragment() {

    private var imageCapture: ImageCapture? = null
    private lateinit var outputDirectory: File
    private lateinit var cameraExecutor: ExecutorService
    private var cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA

    companion object {
        private const val TAG = "CameraFragment"
        private const val FILENAME_FORMAT = "yyyy-MM-dd-HH-mm-ss-SSS"
        private const val CAMERA_REQUEST_CODE_PERMISSIONS = 10
    }

    lateinit var mContext : Context
    lateinit var mActivity : FragmentActivity

   

    override fun onAttach(context: Context) {
        super.onAttach(context)

        mContext = context
        activity?.let { mActivity = it }

    }


    private fun getOutputDirectory(): File {
        val mediaDir = mActivity.externalMediaDirs.firstOrNull()?.let {
            File(it, resources.getString(R.string.app_name)).apply { mkdirs() }
        }
        return if (mediaDir != null && mediaDir.exists())
            mediaDir else mActivity.filesDir
    }


    private fun startCamera() {
        val cameraProviderFuture = ProcessCameraProvider.getInstance(mContext)

        cameraProviderFuture.addListener(Runnable {
            // Used to bind the lifecycle of cameras to the lifecycle owner
            val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()

            // Preview
            val preview = Preview.Builder()
                    .build()
                    .also {
                        it.setSurfaceProvider(previewView.surfaceProvider)
                    }


            imageCapture = ImageCapture.Builder().build()


            try {
                // Unbind use cases before rebinding
                cameraProvider.unbindAll()

                // Bind use cases to camera
                cameraProvider.bindToLifecycle(
                        this, cameraSelector, preview, imageCapture)

            } catch (exc: Exception) {
                Log.e(TAG, "Use case binding failed", exc)
            }

        }, ContextCompat.getMainExecutor(mContext))
    }


    private fun takePhoto() {

        // Get a stable reference of the modifiable image capture use case
        val imageCapture = imageCapture ?: return


        // Create time-stamped output file to hold the image
        val photoFile = File(
                outputDirectory,
                SimpleDateFormat(FILENAME_FORMAT, Locale.US
                ).format(System.currentTimeMillis()) + ".jpg")

        // Create output options object which contains file + metadata
        val outputOptions = ImageCapture.OutputFileOptions.Builder(photoFile).build()


        // Set up image capture listener, which is triggered after photo has
        // been taken
        imageCapture.takePicture(outputOptions, ContextCompat.getMainExecutor(mContext), object : ImageCapture.OnImageSavedCallback {

            override fun onError(exc: ImageCaptureException) {
                Log.d("agungxxx", "2: ${exc.localizedMessage}")
                Log.e(TAG, "Photo capture failed: ${exc.message}", exc)
            }

            override fun onImageSaved(output: ImageCapture.OutputFileResults) {
                cameraSharedViewModel.sendImageUriPathToPreviousDestination(photoFile)
                findNavController().navigateUp()
            }
        })

    }

}