Error while building apk [Question]

[gabriel-ribeiro-099]

Question

Hey guys, I'm using Flet in my project, but while generating the APK, I encountered the following error:

PS C:\Users\myuser\source\repos\portal_mobile_v2> flet build apk
[10:18:30] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref 0.24.1 ✅
           Customized app icons and splash images ✅
[10:18:35] Generated app icons ✅
[10:18:39] Generated splash screens ✅
[10:19:10] Running package command
           Creating asset directory: C:\Users\myuser\AppData\Local\Temp\flet_flutter_build_gpnhUoAB7h\app
           Copying Python app from C:\Users\myuser\source\repos\portal_mobile_v2 to
           C:\Users\myuser\AppData\Local\Temp\serious_python_temp72f26664
           Configured mobile platform with sitecustomize.py at
           C:\Users\myuser\AppData\Local\Temp\serious_python_sitecustomize41a84800\sitecustomize.py
           Installing dependencies with pip command to
           C:\Users\myuser\AppData\Local\Temp\serious_python_temp72f26664\__pypackages__
           Extracting Python distributive from
           C:\Users\myuser\AppData\Local\Temp\cpython-3.11.6+20231002-x86_64-pc-windows-msvc-shared-install_only.tar.gz to C:\Users\myuser\AppData\Local\Temp\hostpython3.11_925cf069
           Compiling Python sources at C:\Users\myuser\AppData\Local\Temp\serious_python_temp72f26664

           Error building Flet app - see the log of failed command above.
[10:19:14] Doctor summary (to see all details, run flutter doctor -v):
           [√] Flutter (Channel stable, 3.24.5, on Microsoft Windows, locale pt-BR)
           [√] 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 17.11.5)
           [√] Android Studio (version 2024.1)
           [√] VS Code (version 1.95.3)
           [√] Connected device (3 available)
           [√] Network resources

           • No issues found!

I tried to find the log of Compiling Python sources at C:\Users\myuser\AppData\Local\Temp\serious_python_temp72f26664, but there was none. I searched both in my project root and the serious_python folder (before it was auto-deleted).

I don’t know why my app isn’t building the APK. All paths are correct in the environment, and no errors occurred while testing. Has anyone encountered a similar error?

I have already searched everywhere: ChatGPT, StackOverflow, tutorials (including some @ndonkoHenri videos), but nothing worked.

Code sample

No response

Error message

No response

------------------------------------------------------

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

[ndonkoHenri]

Upgrade to Flet v0.25.0 and retry

pip install 'flet[all]' --upgrade  
flet build apk --v

[gabriel-ribeiro-099]

Thanks, that worked! I built the APK and installed it, but (sadly, there's a but) my app (which I installed on my physical Android device) does not work. I receive "{name of my app} stopped".

I tried running it on the emulator (Android 14) and got the following log in my logcat when I tried to open my app:

--------- beginning of main
11-29 11:54:01.306  5479  5479 I com.flet.src: Using CollectorTypeCC GC.
11-29 11:54:01.309  5479  5479 W com.flet.src: Unexpected CPU variant for x86: x86_64.
11-29 11:54:01.309  5479  5479 W com.flet.src: Known variants: atom, sandybridge, silvermont, goldmont, goldmont-plus, tremont, kabylake, default
11-29 11:54:01.338  5479  5479 E com.flet.src: Not starting debugger since process cannot load the jdwp agent.
11-29 11:54:01.936  5479  5479 W com.flet.src: type=1400 audit(0.0:18): avc:  denied  { read } for  name="max_map_count" dev="proc" ino=62491 scontext=u:r:untrusted_app:s0:c182,c256,c512,c768 tcontext=u:object_r:proc_max_map_count:s0 tclass=file permissive=0 app=com.flet.src

fyi: the app runs fine when i execute the main.py

Do you know why this is happening? I searched the issues and discussion board, but their solutions (from previous Flet versions) did not work.