On Activity result

activityResult.kt

override fun onActivityResult(
        requestCode: Int,
        resultCode: Int,
        resultIntent: Intent?
    ) {
        lifecycleScope.launch {
            if (resultCode == Activity.RESULT_OK && resultIntent != null) {
                val uri = resultIntent.data!!
                val pfd = contentResolver.openFileDescriptor(uri, "w")
                pfd?.use {
                    FileOutputStream(pfd.fileDescriptor).use { outputStream ->
                        val file = packZipFileForBackup(context)
                        try {
                            file?.source()?.use inner2@{ input ->
                                return@inner2 outputStream.sink().buffer().use inner@{ output ->
                                    output.writeAll(input)
                                }
                            }
                        } finally {
                            if (file?.exists() == true) {
                                file.delete()
                            }
                        }
                    }
                }
            }
        }
        super.onActivityResult(requestCode, resultCode, resultIntent)
    }