flet build aab process failed with dart error

[JunDamin]

Duplicate Check

• I have searched the opened issues and there are no duplicates

Describe the bug

It worked but after I update flet and android studio, it starts to fail.

I use version below.
flet == 0.25.2
adriod studio == 2024.2.1
flutter == 3.27.1

When I build a bundle a package, I faced error below.
It has no error when I flet run.
How can I solve the problem?

---

(flet-test-py3.10) C:\Users\freed\Documents\python_projects\flet-test>flet build aab
[15:32:38] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref 0.25.2 :white_check_mark:
Customized app icons and splash images ✅
[15:32:48] Generated app icons :white_check_mark:
[15:32:52] Generated splash screens :white_check_mark:
[15:34:09] Packaged Python app :white_check_mark:
[15:35:11]
Running Gradle task 'bundleRelease'...
Running Gradle task 'bundleRelease'... 57.9s

       ../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart:356:28: Error: A value of type 'TabBarThemeData' can't be returned from a function with return type 'TabBarTheme?'. 
        - 'TabBarThemeData' is from 'package:flutter/src/material/tab_bar_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/tab_bar_theme.dart').
        - 'TabBarTheme' is from 'package:flutter/src/material/tab_bar_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/tab_bar_theme.dart').
         return theme.tabBarTheme.copyWith(
                                  ^
       ../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart:438:28: Error: A value of type 'DialogThemeData' can't be returned from a function with return type 'DialogTheme?'. 
        - 'DialogThemeData' is from 'package:flutter/src/material/dialog_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/dialog_theme.dart').
        - 'DialogTheme' is from 'package:flutter/src/material/dialog_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/dialog_theme.dart').
         return theme.dialogTheme.copyWith(
                                  ^
       ../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart:482:26: Error: A value of type 'CardThemeData' can't be returned from a function with return type 'CardTheme?'.     
        - 'CardThemeData' is from 'package:flutter/src/material/card_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/card_theme.dart').
        - 'CardTheme' is from 'package:flutter/src/material/card_theme.dart' ('../../../../flutterSDK/flutter/packages/flutter/lib/src/material/card_theme.dart').
         return theme.cardTheme.copyWith(
                                ^
       Target kernel_snapshot_program failed: Exception


       FAILURE: Build failed with an exception.

       * What went wrong:
       Execution failed for task ':app:compileFlutterBuildRelease'.

Process 'command 'C:\Users\freed\Documents\flutterSDK\flutter\bin\flutter.bat'' finished with non-zero exit value 1

       * Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

       BUILD FAILED in 56s
       Gradle task bundleRelease failed with exit code 1

       Error building Flet app - see the log of failed command above.

[15:35:20] Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.27.1, on Microsoft Windows [Version 10.0.22631.4602], locale ko-KR)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.6.4)
[√] Android Studio (version 2024.2)
[√] VS Code (version 1.96.2)
[√] Connected device (3 available)
[√] Network resources

       • No issues found!

Code sample

Code

it is the todo app code from gallery

import flet as ft


class Task(ft.Column):
    def __init__(self, task_name, task_status_change, task_delete):
        super().__init__()
        self.completed = False
        self.task_name = task_name
        self.task_status_change = task_status_change
        self.task_delete = task_delete
        self.display_task = ft.Checkbox(
            value=False, label=self.task_name, on_change=self.status_changed
        )
        self.edit_name = ft.TextField(expand=1)

        self.display_view = ft.Row(
            alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
            vertical_alignment=ft.CrossAxisAlignment.CENTER,
            controls=[
                self.display_task,
                ft.Row(
                    spacing=0,
                    controls=[
                        ft.IconButton(
                            icon=ft.icons.CREATE_OUTLINED,
                            tooltip="Edit To-Do",
                            on_click=self.edit_clicked,
                        ),
                        ft.IconButton(
                            ft.icons.DELETE_OUTLINE,
                            tooltip="Delete To-Do",
                            on_click=self.delete_clicked,
                        ),
                    ],
                ),
            ],
        )

        self.edit_view = ft.Row(
            visible=False,
            alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
            vertical_alignment=ft.CrossAxisAlignment.CENTER,
            controls=[
                self.edit_name,
                ft.IconButton(
                    icon=ft.icons.DONE_OUTLINE_OUTLINED,
                    icon_color=ft.colors.GREEN,
                    tooltip="Update To-Do",
                    on_click=self.save_clicked,
                ),
            ],
        )
        self.controls = [self.display_view, self.edit_view]

    def edit_clicked(self, e):
        self.edit_name.value = self.display_task.label
        self.display_view.visible = False
        self.edit_view.visible = True
        self.update()

    def save_clicked(self, e):
        self.display_task.label = self.edit_name.value
        self.display_view.visible = True
        self.edit_view.visible = False
        self.update()

    def status_changed(self, e):
        self.completed = self.display_task.value
        self.task_status_change(self)

    def delete_clicked(self, e):
        self.task_delete(self)


class TodoApp(ft.Column):
    # application's root control is a Column containing all other controls
    def __init__(self):
        super().__init__()
        self.new_task = ft.TextField(
            hint_text="What needs to be done?", on_submit=self.add_clicked, expand=True
        )
        self.tasks = ft.Column()

        self.filter = ft.Tabs(
            scrollable=False,
            selected_index=0,
            on_change=self.tabs_changed,
            tabs=[ft.Tab(text="all"), ft.Tab(text="active"), ft.Tab(text="completed")],
        )

        self.items_left = ft.Text("0 items left")

        self.width = 600
        self.controls = [
            ft.Row(
                [ft.Text(value="Todos", theme_style=ft.TextThemeStyle.HEADLINE_MEDIUM)],
                alignment=ft.MainAxisAlignment.CENTER,
            ),
            ft.Row(
                controls=[
                    self.new_task,
                    ft.FloatingActionButton(
                        icon=ft.icons.ADD, on_click=self.add_clicked
                    ),
                ],
            ),
            ft.Column(
                spacing=25,
                controls=[
                    self.filter,
                    self.tasks,
                    ft.Row(
                        alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
                        vertical_alignment=ft.CrossAxisAlignment.CENTER,
                        controls=[
                            self.items_left,
                            ft.OutlinedButton(
                                text="Clear completed", on_click=self.clear_clicked
                            ),
                        ],
                    ),
                ],
            ),
        ]

    def add_clicked(self, e):
        if self.new_task.value:
            task = Task(self.new_task.value, self.task_status_change, self.task_delete)
            self.tasks.controls.append(task)
            self.new_task.value = ""
            self.new_task.focus()
            self.update()

    def task_status_change(self, task):
        self.update()

    def task_delete(self, task):
        self.tasks.controls.remove(task)
        self.update()

    def tabs_changed(self, e):
        self.update()

    def clear_clicked(self, e):
        for task in self.tasks.controls[:]:
            if task.completed:
                self.task_delete(task)

    def before_update(self):
        status = self.filter.tabs[self.filter.selected_index].text
        count = 0
        for task in self.tasks.controls:
            task.visible = (
                status == "all"
                or (status == "active" and task.completed == False)
                or (status == "completed" and task.completed)
            )
            if not task.completed:
                count += 1
        self.items_left.value = f"{count} active item(s) left"


def main(page: ft.Page):
    page.title = "ToDo App"
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
    page.scroll = ft.ScrollMode.ADAPTIVE

    # create app control and add it to the page
    page.add(TodoApp())


ft.app(main)```

</details>


### To reproduce

you can reproduce it when you run `flet build aab`

### Expected behavior

_No response_

### Screenshots / Videos

<details open>
<summary>Captures</summary>

[Upload media here]

</details>


### Operating System

Windows

### Operating system details

windows 11

### Flet version

0.25.2

### Regression

Yes, it used to work in a previous Flet version (please specify the version in additional details)

### Suggestions

_No response_

### Logs

<details open><summary>Logs</summary>

```console
[Paste your logs here]

Additional details

No response

[LilMaxonthebeat]

Had same error when building and for me downgrading a bit worked well, there is need to adopt some changes from flutter sdk in flet,my current versions below

Flet version

flet --version
0.25.0

Flutter version

flutter --version
Flutter 3.24.5 • channel [user-branch] • unknown source
Framework • revision dec2ee5c1f (8 weeks ago) • 2024-11-13 11:13:06 -0800
Engine • revision a18df97ca5
Tools • Dart 3.5.4 • DevTools 2.37.3

So you can try to simply downgrade both flet and flutter to stable versions in which they work good like shown below.