pick folder using system tree view then use it

gistfile1.txt

   val dirRequest =
        registerForActivityResult(ActivityResultContracts.OpenDocumentTree()) { uri: Uri? ->
            uri?.let { folderUri ->
              
                contentResolver.takePersistableUriPermission(
                    folderUri,
                    Intent.FLAG_GRANT_READ_URI_PERMISSION
                )
                
              //use picked uri android
                onFolderPickerResult?.invoke(folderUri)

            }
        }
        
        
        //call to start folder picker in tree view 
         dirRequest.launch(null)