APK shows white screen (builds after December 2024)

[pavlevuckovic-byte]

Body:

• APK built in December 2024 with flet 0.28.3 works fine
• Same code rebuilt now shows white screen
• Even a simple 5-line "Hello World" app shows white screen
• Tested on same Android device
• Tried pinning flet==0.28.3, Flutter 3.29.2, ubuntu-22.04 - still white screen

This appears to be a regression in the build process.

[ndonkoHenri]

Can you please try the latest release and let know if the issue still happens?

[yunguangli]

I built windows and Android apps with 0.80.1 and 0.80.2. Android works fine. Windows apps show white screen for as long as 5-10 seconds at the beginning .Afterwards they work fine.

[pavlevuckovic-byte]

Can you please try the latest release and let know if the issue still happens?

I tried the latest version (0.80.2) but still getting white screen on Android.

Details:

• Built APK successfully with flet build apk --verbose --yes
• APK installs fine on Android device
• App shows white screen indefinitely (waited 30+ seconds)
• Same code worked perfectly in December 2024 with flet 0.28.3
• Even a simple 5-line "Hello World" app shows white screen
• Old APK from December still works on the same device

Workflow used:

• ubuntu-latest
• python 3.11
• java 17 (temurin)
• pip install flet
• flet build apk --verbose --yes

Is there anything else I can try?

[pavlevuckovic-byte]

I tried another one, with the simplest possible app and still getting white screen:

import flet as ft

def main(page: ft.Page):
    page.title = "Moja Flet Aplikacija"
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER

    def promeni_tekst(e):
        tekst_pozdrava.value = f"Zdravo, {polje_za_ime.value}!"
        tekst_pozdrava.update()

    polje_za_ime = ft.TextField(label="Unesi svoje ime", width=200)
    dugme = ft.ElevatedButton(text="Klikni me", on_click=promeni_tekst)
    tekst_pozdrava = ft.Text(value="Cekam unos...", size=20)

    page.add(
        polje_za_ime,
        dugme,
        tekst_pozdrava
    )

ft.app(target=main)

Build environment:

• ubuntu-latest
• python 3.11
• java 17 (temurin)
• pip install flet (latest version)
• flet build apk --verbose --yes

Result:

• APK builds successfully
• APK installs on Android device
• App shows white screen indefinitely (waited 60+ seconds)
• Old APK from December 2024 (flet 0.28.3) still works perfectly on the same device

This happens with any code - even the simplest "Hello World" app shows white screen.

[jjjunehkim]

change a code and try again with 0.80.x.

ft.app(target=main) -> ft.run(main)