kotlin.KotlinNullPointerException文件未建立，仅在三星设备中

Question

我使用这种方法从uri获取文件，在所有设备上都可以正常工作，但只能在三星设备上崩溃！

fun Activity.getFilePath(uri: Uri): File {
    var cursor: Cursor? = null
    return try {
        val dataArray = arrayOf(MediaStore.Images.Media.DATA)
        cursor = contentResolver.query(uri, dataArray, null, null, null)
        val index = cursor?.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)
        cursor?.moveToFirst()
        File(index?.let { cursor?.getString(it) })
    } catch (e: Exception) {
        throw KotlinNullPointerException("File not founded")
    } finally {
        cursor?.close()
    }
}

从图库中获取图片

 fun Activity.chooseImageFromGallery(withAskPermission: Boolean) {
    if (isPermissionsGranted(Manifest.permission.READ_EXTERNAL_STORAGE)) {
        val intent = Intent(Intent.ACTION_PICK,
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST)
    } else {
        if (withAskPermission && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
                    PICK_IMAGE_REQUEST)
        }
    }
}

关于活动结果

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    if (resultCode == Activity.RESULT_OK && requestCode == PICK_IMAGE_REQUEST) {
        uri = data?.data
        file = uri?.let { activity?.getFilePath(it) }
        //
    } 
}