我正试图为我的小企业（只有3人）创建一个应用程序，允许用户（我）选择一个csv文件，让它转换数据，并将其保存为新的csv。我能够成功地从我直接带入android studio的文件中读取和操作数据，我有一个工作文件选择器，可以访问最近的文档。但是，我无法选择文档或下载文件夹中的任何文件。如能提供帮助将不胜感激。
编辑：添加了额外的代码，并澄清了我有问题的部分。
下面是我的文件选择器的代码。我会完全诚实地说，我在网上找到了大部分代码，并不完全确切地说它是如何工作的，因为大多数Android文档和示例都显示了弃用的版本

private var uriToFile:String = "Path"


    private var fileImportCompletionHandler: (Uri.()->Unit)? = null

    private val fileImportIntentLauncher =
        registerForActivityResult(
            ActivityResultContracts.StartActivityForResult()
        ) { result: ActivityResult ->

            if (result.resultCode == Activity.RESULT_OK) {

                val intent = result.data
                intent?.data?.let { uri ->

                    Log.i("MYTAG","uri at first check is $uri")
                    fileImportCompletionHandler?.invoke(uri) ?: run {
                        // TODO() warn

                    }

                    fileImportCompletionHandler = null
                   val p = uri.path
                    Log.i("MYTAG","p is $p")
                    

                } ?: run {
                    // TODO() warn

                }

            }
            else {
                // TODO() warn
            }

        }

    private val importIntent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {

        addCategory(Intent.CATEGORY_OPENABLE)
        type = "text/csv"

    }

fun showActionOpenDocument(completion: Uri.()->Unit) {

        fileImportCompletionHandler = completion
        fileImportIntentLauncher.launch(importIntent)

    }

这就是我所说的

binding.btnImport.setOnClickListener {
            //requestPermission()
            showActionOpenDocument {
                uriToFile = this.toString()
                binding.tvPath.text = uriToFile
            }

下面是我如何调用read（在别处完成的实际计算和操作）

fun readCSV(path:String): BufferedReader {
        val inputStream: InputStream? = contentResolver.openInputStream(Uri.parse(path))
        //return BufferedReader(InputStreamReader(assets.open("Test.csv")))

        return BufferedReader(InputStreamReader(inputStream))

    }

下面是android清单中的权限部分。我实际上并不需要访问相机，但是请求权限对话框甚至没有显示存储权限，所以我正在检查是否有不同的权限。是的

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />

这里是所有实际的权限的东西（我已经交换了所有的权限。相机是唯一的权限，甚至会弹出

private val requestPermissionLauncher =
    registerForActivityResult(
        ActivityResultContracts.RequestPermission()
    ) { isGranted: Boolean ->
        if (isGranted) {
            // Permission is granted. Continue the action or workflow in your
            // app.
            Log.i("MYTAG", "isGranted = true")

        } else {
            // Explain to the user that the feature is unavailable because the
            // feature requires a permission that the user has denied. At the
            // same time, respect the user's decision. Don't link to system
            // settings in an effort to convince the user to change their

        }
    }

fun requestPermission(){
    when{
        ContextCompat.checkSelfPermission(
            vContext,
            Manifest.permission.READ_EXTERNAL_STORAGE
        ) == PackageManager.PERMISSION_GRANTED -> {
            //Permission is Granted

            Log.i("MYTAG","Permission Granted")

        }
        ActivityCompat.shouldShowRequestPermissionRationale(
            vActivity,
            Manifest.permission.READ_EXTERNAL_STORAGE
        ) -> {
            //Permission denied : Additional Rational should be displayed
            Log.i("MYTAG","Permission Denied")
            showRationaleDialog("TCG Inventory Converter",
                "TCG Inventory Converter needs access to your External Storage"+
                        "\n"+"\n"+"REASON: Required to import and export CSV Files ")

        }
        else -> {
            // Permission has not been asked yet
            Log.i("MYTAG","Permission Requested")
            requestPermissionLauncher.launch(
                Manifest.permission.READ_EXTERNAL_STORAGE
            )
        }
    }
}

private fun showRationaleDialog(title:String, message:String){
    val builder: AlertDialog.Builder = AlertDialog.Builder(vContext)
    builder.setTitle(title)
        .setMessage(message)
        .setPositiveButton("Cancel"){ dialog, _->
         dialog.dismiss()
        }
        .setNegativeButton("Open Permissions"){ dialog, _ ->
            dialog.run {
                val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
                val uri = Uri.fromParts("package","com.example.filereadtest",null)
                intent.data =uri
                startActivity(intent)
            }

        }
    builder.create().show()
}

Image of non selectable file that I want selectable
Image of only selectable location I can find (can't save files here)