Update ResponsiveRow elements [Question]

[SebastianSosa]

Question

Hi,

I have an assets folder with the following structure:

assests
|__Bibliotheque

I built an APK that can copy and paste a folder into assets/Bibliotheque. The folder needs to have the following structure:
Folder
|__subFolder1
|__subFolder2
|__one image '.png'

The idea is to update a ResponsiveRow of ElevatedButtons within the app with the new folder, using the image in it as the content for the ElevatedButtons. The code below works correctly on Windows, but it doesn't work in the APK:

Code sample

import flet as ft
import os
import shutil
import random
from distutils.dir_util import copy_tree
  
def get_folder(base_path):
    stories = {}
    image_extensions = ['.jpg', '.jpeg', '.png']
    for folder in os.listdir(base_path):        
        if os.path.isdir(os.path.join(base_path, folder)) and folder != 'icons':
            newPath = os.path.join(base_path, folder)
            for file in os.listdir(newPath):
                # Check if the file has one of the image extensions
                if any(file.lower().endswith(ext) for ext in image_extensions):       
                    stories[newPath] =  os.path.join(newPath, file)
    return stories

def move_folder_and_contents(src_dir, dest_dir):
    # Get the last folder name
    last_folder = os.path.basename(src_dir)
    # Move the entire directory to the destination directory
    print("------------------------------------------------------------")
    print(str(dest_dir))
    print(str(last_folder))
    print("------------------------------------------------------------")
    copy_tree(src_dir, os.path.join(dest_dir, last_folder))

def main(page: ft.page):
    #with open("call_log.txt", 'w') as file:
    #    # Opening in 'w' mode automatically clears the file
    #    pass

    # Page
    page.title = "test"
    page.theme_mode = ft.ThemeMode.DARK
    page.folder_path = os.path.join(os.getcwd(), "assets/Bibliotheque")
    page.scroll = ft.ScrollMode.ADAPTIVE
    

    # Folder picker --------------------------------------
    def pick_files_result(e: ft.FilePickerResultEvent, page = page):
        if e.path:
            move_folder_and_contents(e.path, page.folder_path)
            home_folders, stories_folder = build_home_page()
            page.add(stories_folder)
            page.update()
            page.controls[0] = stories_folder
            page.update()   
    
    page.pick_files_dialog = ft.FilePicker(on_result=pick_files_result)
    

    # Build App --------------------------------------
    selected_files = ft.Text(page.folder_path)
    page.overlay.append(page.pick_files_dialog)
    choix = ft.Audio(src= "assets/Bibliotheque/choix.mp3", 
                          autoplay=True,
                          volume=1,
                          balance=0,
                          on_loaded=lambda _: print("Loaded"),
                          on_duration_changed=lambda e: print("Duration changed:", e.data),
                          on_state_changed=lambda e: print("State changed:", e.data),
                          on_seek_complete=lambda _: print("Seek complete"),)
    page.overlay.append(choix)
    
    page.update()
    
    page.floating_action_button = ft.FloatingActionButton(
        content=ft.Row(
            [ft.Icon(ft.icons.ADD)], alignment="center", spacing=5
        ),
        shape=ft.CircleBorder(),
        width=100,
        mini=True,
        on_click = lambda _: page.pick_files_dialog.get_directory_path()
    )    
    
    # Pages --------------------------------------  
    def build_home_page():
        home_folders = get_folder(page.folder_path)
        stories_folder = ft.ResponsiveRow()
        folder_item = {}
        count = 0
        for key in home_folders.keys():
            folder_item[key] = count
            count = count + 1 
            stories_folder.controls.append(
                ft.ElevatedButton(col={"sm": 12, "md": 4, "xl": 2},
                    content = ft.Image(src = home_folders[key],
                                       border_radius=ft.border_radius.all(20)),
                    style=ft.ButtonStyle(
                        shape = {ft.MaterialState.DEFAULT:ft.RoundedRectangleBorder(radius=20)},
                        padding={ft.MaterialState.HOVERED: 0}))
            )      

        return home_folders, stories_folder
    page.bottom_appbar = '' # Initialize empty object

    # Get subfolder of Bibliotheque as a dic wehre keys = path & value = image
    home_folders, stories_folder = build_home_page()
    page.add(stories_folder)
    page.update()

ft.app(target=main)

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.