Pillow package problem on android

[JudicaelK]

Hi,

When I try to run my flet app on android, i get "No module named PIL".
Any idea?

Thanks

[ndonkoHenri]

Can you share the content of your pyproject.toml file?

[JudicaelK]

Hi, I don't have this file in my project

[FeodorFitsner]

Can you run flet build with -v option (verbose) and paste the log here?

[JudicaelK]

Hi,

This is the log

(MyFletProject) PS C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp> flet build apk -v --module-name .\main.py
[21:46:38] Run subprocess: ['C:\flutter\flutter\bin\flutter.BAT', '--version', '--no-version-check', '--suppress-analytics']
[21:46:39] Flutter executable: C:\flutter\flutter\bin\flutter.BAT
Dart executable: C:\flutter\flutter\bin\dart.BAT
JDK installed at C:\Users\Judicael KOUADIO\java\17.0.13+11
Configuring Flutter's path to JDK
Run subprocess: ['C:\flutter\flutter\bin\flutter.BAT', 'config', '--suppress-analytics', '--jdk-dir=C:\Users\Judicael KOUADIO\java\17.0.13+11']
Setting "jdk-dir" value to "C:\Users\Judicael KOUADIO\java\17.0.13+11".

       You may need to restart any open editors for them to read new settings.
       JDK installed ✅                                                                                                                                                         
       Android SDK installation found at C:\Users\Judicael KOUADIO\AppData\Local\Android\Sdk
       Android SDK package "cmdline-tools;latest" is already installed
       Android SDK package "platform-tools" is already installed
       Android SDK package "platforms;android-35" is already installed
       Android SDK package "build-tools;34.0.0" is already installed
       Android SDK installed ✅                                                                                                                                                 
       Custom Flutter dependencies: {}                                                                                                                                          

[21:46:42] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref "0.26.0" ✅
Run subprocess: ['C:\flutter\flutter\bin\dart.BAT', 'run', '--suppress-analytics', 'serious_python:main', 'package', 'C:\Users\Judicael
KOUADIO\PycharmProjects\MyFletProject\MyFletApp', '--platform', 'Android', '--requirements', 'flet==0.26.0', '--exclude', 'build', '--cleanup']
[21:46:45] Running package command
Extra PyPi indexes:
Creating asset directory: C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\flutter\app
Created temp directory: C:\Users\JUDICA~1\AppData\Local\Temp\serious_python_tempf4aefe3d
Copying Python app from C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp to a temp directory
Cleanup app
Configured Android/arm64-v8a platform with sitecustomize.py
Installing with pip command to C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\site-packages\arm64-v8a
Downloading Python distributive from
https://github.com/indygreg/python-build-standalone/releases/download/20240909/cpython-3.12.6+20240909-x86_64-pc-windows-msvc-shared-install_only_stripped.tar.gz to a
build directory
[21:46:48] Extracting Python distributive
[21:47:01] Cleanup installed packages
Configured Android/armeabi-v7a platform with sitecustomize.py
Installing with pip command to C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\site-packages\armeabi-v7a
[21:47:08] Cleanup installed packages
[21:47:09] Configured Android/x86_64 platform with sitecustomize.py
Installing with pip command to C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\site-packages\x86_64
[21:47:17] Cleanup installed packages
Configured Android/x86 platform with sitecustomize.py
Installing with pip command to C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\site-packages\x86
[21:47:25] Cleanup installed packages
[21:47:26] Creating app archive at C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\flutter\app/app.zip from a temp directory
Writing app archive hash to C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\flutter\app/app.zip.hash
Deleting temp directory
Packaged Python app ✅
[21:47:28] Customized app icons and splash images ✅
Run subprocess: ['C:\flutter\flutter\bin\dart.BAT', 'run', '--suppress-analytics', 'flutter_launcher_icons']
[21:47:31] ════════════════════════════════════════════
FLUTTER LAUNCHER ICONS (v0.14.3)
════════════════════════════════════════════

       • Creating default icons Android
       • Overwriting the default Android launcher icon with a new icon
       • Creating adaptive icons Android
       • No colors.xml file found in your Android project
       • Creating colors.xml file and adding it to your Android project
       • Creating mipmap xml file Android
       • Overwriting default iOS launcher icon with new icon

[21:47:32] Creating Icons for Web...
Creating Icons for Windows...
Creating Icons for MacOS...
[21:47:34]
✓ Successfully generated launcher icons
Generated app icons ✅
Run subprocess: ['C:\flutter\flutter\bin\dart.BAT', 'run', '--suppress-analytics', 'flutter_native_splash:create']
[21:47:36] [Android] Creating default splash images
[Android] Creating dark mode splash images
[Android] Creating default android12splash images
[Android] Creating dark mode android12splash images
[Android] Updating launch background(s) with splash image path...
[Android] - android/app/src/main/res/drawable/launch_background.xml
[Android] - android/app/src/main/res/drawable-night/launch_background.xml
[Android] - android/app/src/main/res/drawable-v21/launch_background.xml
[Android] - android/app/src/main/res/drawable-night-v21/launch_background.xml
[Android] Updating styles...
[Android] - android/app/src/main/res/values-v31/styles.xml
[Android] No android/app/src/main/res/values-v31/styles.xml found in your Android project
[Android] Creating android/app/src/main/res/values-v31/styles.xml and adding it to your Android project
[Android] - android/app/src/main/res/values-night-v31/styles.xml
[Android] No android/app/src/main/res/values-night-v31/styles.xml found in your Android project
[Android] Creating android/app/src/main/res/values-night-v31/styles.xml and adding it to your Android project
[Android] - android/app/src/main/res/values/styles.xml
[Android] - android/app/src/main/res/values-night/styles.xml
Creating images
[21:47:37] Creating dark mode images
Updating ios/Runner/Info.plist for status bar hidden/visible
[Web] Creating images
[Web] Creating images
[Web] Creating background images
[Web] Creating CSS
[21:47:38] [Web] Updating index.html

       ✅ Native splash complete.
       Now go finish building something awesome! 💪 You rock! 🤘🤩
       Like the package? Please give it a 👍 here: https://pub.dev/packages/flutter_native_splash

       Generated splash screens ✅                                                                                                                                              
       Run subprocess: ['C:\\flutter\\flutter\\bin\\flutter.BAT', 'build', 'apk', '--no-version-check', '--suppress-analytics']                                                 
       Resolving dependencies...

[21:47:39] Downloading packages...
archive 3.6.1 (4.0.2 available)
characters 1.3.0 (1.4.0 available)
clock 1.1.1 (1.1.2 available)
collection 1.19.0 (1.19.1 available)
fl_chart 0.69.2 (0.70.2 available)
! flet 0.26.0 (overridden)
flutter_lints 2.0.3 (5.0.0 available)
image 4.3.0 (4.5.2 available)
intl 0.19.0 (0.20.2 available)
js 0.6.7 (0.7.2 available)
lints 2.1.1 (5.1.1 available)
material_color_utilities 0.11.1 (0.12.0 available)
meta 1.15.0 (1.16.0 available)
path 1.9.0 (1.9.1 available)
petitparser 6.0.2 (6.1.0 available)
sensors_plus 4.0.2 (6.1.1 available)
sensors_plus_platform_interface 1.2.0 (2.0.1 available)
toml 0.15.0 (0.16.0 available)
url_strategy 0.2.0 (discontinued)
! wakelock_plus 1.2.10 (overridden)
! web 1.1.0 (overridden)
web_socket_channel 2.4.5 (3.0.2 available)
! webview_flutter_android 4.3.2 (overridden)
win32_registry 1.1.5 (2.0.1 available)
! window_manager 0.4.3 (overridden)
Got dependencies!
1 package is discontinued.
20 packages have newer versions incompatible with dependency constraints.
Try flutter pub outdated for more information.
[21:47:40]
[21:47:59] Running Gradle task 'assembleRelease'...
Warning: SDK processing. This version only understands SDK XML versions up to 3 but an SDK XML file of version 4 was encountered. This can happen if you use versions of
Android Studio and the command-line tools that were released at different times.
[21:48:27] Font asset "CupertinoIcons.ttf" was tree-shaken, reducing it from 257628 to 209160 bytes (18.8% reduction). Tree-shaking can be disabled by providing the
--no-tree-shake-icons flag when building your app.
Font asset "MaterialIcons-Regular.otf" was tree-shaken, reducing it from 1645184 to 1261080 bytes (23.3% reduction). Tree-shaking can be disabled by providing the
--no-tree-shake-icons flag when building your app.
[21:50:35] Running Gradle task 'assembleRelease'... 175,0s
[21:50:36] √ Built build\app\outputs\flutter-apk\app-release.apk (63.6MB)
Built .apk for Android ✅
Copying build output from: C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\flutter\build\app\outputs\flutter-apk*
Copied build to build\apk directory ✅
╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮│ Successfully built your .apk for Android! 🥳 Find it in build\apk directory. 📁

[FeodorFitsner]

OK. looks like you don't have pyproject.toml, nor requirements.txt in your project as I see only flet==0.26.0 as dependency.
Either create pyproject.toml with dependencies section and both flet and pillow or requirements.txt.

[JudicaelK]

After generating reqyuirements.txt file with "pip freeze > requirements.txt", I get the following log :

(MyFletProject) PS C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp> pip freeze > requirements.txt
(MyFletProject) PS C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp> flet build apk -v --module-name .\main.py
[22:51:21] Run subprocess: ['C:\flutter\flutter\bin\flutter.BAT', '--version', '--no-version-check', '--suppress-analytics']
[22:51:22] Flutter executable: C:\flutter\flutter\bin\flutter.BAT
Dart executable: C:\flutter\flutter\bin\dart.BAT
JDK installed at C:\Users\Judicael KOUADIO\java\17.0.13+11
Configuring Flutter's path to JDK
Run subprocess: ['C:\flutter\flutter\bin\flutter.BAT', 'config', '--suppress-analytics', '--jdk-dir=C:\Users\Judicael KOUADIO\java\17.0.13+11']
Setting "jdk-dir" value to "C:\Users\Judicael KOUADIO\java\17.0.13+11".

       You may need to restart any open editors for them to read new settings.
       JDK installed ✅                                                                                                                                                         
       Android SDK installation found at C:\Users\Judicael KOUADIO\AppData\Local\Android\Sdk
       Android SDK package "cmdline-tools;latest" is already installed
       Android SDK package "platform-tools" is already installed
       Android SDK package "platforms;android-35" is already installed
       Android SDK package "build-tools;34.0.0" is already installed
       Android SDK installed ✅                                                                                                                                                 
       Custom Flutter dependencies: {}                                                                                                                                          

[22:51:25] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref "0.26.0" ✅
Run subprocess: ['C:\flutter\flutter\bin\dart.BAT', 'run', '--suppress-analytics', 'serious_python:main', 'package', 'C:\Users\Judicael
KOUADIO\PycharmProjects\MyFletProject\MyFletApp', '--platform', 'Android', '--requirements', '-r,C:\Users\Judicael
KOUADIO\PycharmProjects\MyFletProject\MyFletApp\requirements.txt', '--exclude', 'build', '--cleanup']
[22:51:28] Running package command
Extra PyPi indexes:
Creating asset directory: C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\flutter\app
Created temp directory: C:\Users\JUDICA~1\AppData\Local\Temp\serious_python_temp9d021d59
Copying Python app from C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp to a temp directory
Cleanup app
Configured Android/arm64-v8a platform with sitecustomize.py
Installing [-r, C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp\requirements.txt] with pip command to C:\Users\Judicael
KOUADIO\PycharmProjects\MyFletProject\MyFletApp\build\site-packages\arm64-v8a
Downloading Python distributive from
https://github.com/indygreg/python-build-standalone/releases/download/20240909/cpython-3.12.6+20240909-x86_64-pc-windows-msvc-shared-install_only_stripped.tar.gz to a
build directory
[22:51:32] Extracting Python distributive
[22:51:45] ERROR: Could not find a version that satisfies the requirement flet-desktop==0.26.0 (from versions: none)
ERROR: No matching distribution found for flet-desktop==0.26.0
<_io.TextIOWrapper name=4 encoding='utf8'>
Run subprocess: ['C:\flutter\flutter\bin\flutter.BAT', 'doctor', '--no-version-check', '--suppress-analytics']
[22:51:50] Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.27.4, on Microsoft Windows , locale fr-FR)
[√] 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 17.5.5)
X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C++" workload, and include these
components:
MSVC v142 - VS 2019 C++ x64/x86 build tools
- If there are multiple build tool versions available, install the latest
C++ CMake tools for Windows
Windows 10 SDK
[!] Android Studio (version 2021.2)
X Unable to determine bundled Java version.
[√] Android Studio (version 2024.2)
[√] VS Code (version 1.97.0)
[√] Connected device (3 available)
[√] Network resources

       ! Doctor found issues in 2 categories.                                                                                                                                   

╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ Error building Flet app - see the log of failed command above. │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
(MyFletProject) PS C:\Users\Judicael KOUADIO\PycharmProjects\MyFletProject\MyFletApp>

[ndonkoHenri]

Don't use pip freeze.

The requirements file should contain only the direct dependencies of your app. (flet, pillow, etc)

[JudicaelK]

Thanks, it works now, I'm now able to launch an app on the phone.

Unfortunately I have an other issue.

I tried to donwload images in the app but doesn't work.

Does flet requires explicite in code read and write permissions before memory access on phone?