White Screen Issue on Android APK Built with Flet maybe by missing libpythonbundle.so File

[jaluscg]

Question

When I attempt to build an Android APK using Flet, the build process completes successfully, but the resulting app displays a white screen upon launch. I suspect this issue might be related to the missing libpythonbundle.so file during the build process.

During the bundling process, there seems to be an issue with moving libpythonbundle.so to the required directories. This might be causing the white screen issue.

Code sample

OK
Building .apk for Android...['/home/appveyor/flutter/bin/flutter', 'build', 'apk']
Resolving dependencies... 
  ffi 2.1.0 (2.1.2 available)
  fl_chart 0.65.0 (0.66.1 available)
  flutter_lints 2.0.3 (3.0.1 available)
  flutter_native_splash 2.3.7 (2.3.10 available)
  js 0.6.7 (0.7.0 available)
  lints 2.1.1 (3.0.0 available)
  matcher 0.12.16 (0.12.16+1 available)
  material_color_utilities 0.5.0 (0.8.0 available)
  meta 1.10.0 (1.11.0 available)
  package_info_plus 4.2.0 (5.0.1 available)
  path 1.8.3 (1.9.0 available)
  petitparser 5.4.0 (6.0.2 available)
  test_api 0.6.1 (0.7.0 available)
  toml 0.14.0 (0.15.0 available)
  web 0.3.0 (0.4.2 available)
  web_socket_channel 2.4.0 (2.4.3 available)
  xml 6.3.0 (6.5.0 available)
Got dependencies!
17 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8
Checking the license for package NDK (Side by side) 23.1.7779620 in /usr/lib/android-sdk/licenses
License for package NDK (Side by side) 23.1.7779620 accepted.
Preparing "Install NDK (Side by side) 23.1.7779620 (revision: 23.1.7779620)".
"Install NDK (Side by side) 23.1.7779620 (revision: 23.1.7779620)" ready.
Installing NDK (Side by side) 23.1.7779620 in /usr/lib/android-sdk/ndk/23.1.7779620
"Install NDK (Side by side) 23.1.7779620 (revision: 23.1.7779620)" complete.
"Install NDK (Side by side) 23.1.7779620 (revision: 23.1.7779620)" finished.
Checking the license for package CMake 3.22.1 in /usr/lib/android-sdk/licenses
License for package CMake 3.22.1 accepted.
Preparing "Install CMake 3.22.1 (revision: 3.22.1)".
"Install CMake 3.22.1 (revision: 3.22.1)" ready.
Installing CMake 3.22.1 in /usr/lib/android-sdk/cmake/3.22.1
"Install CMake 3.22.1 (revision: 3.22.1)" complete.
"Install CMake 3.22.1 (revision: 3.22.1)" finished.
Copying P4A libraries from /home/appveyor/.local/share/python-for-android/dists/serious_python
Bundling arm64-v8a
Bundling armeabi-v7a
bundle.sh: 17: pushd: not found
mv: cannot move 'libpythonbundle.so' to '../../libs/arm64-v8a': No such file or directory
bundle.sh: 20: popd: not found
bundle.sh: 23: pushd: not found
mv: cannot move 'libpythonbundle.so' to '../../libs/armeabi-v7a': No such file or directory
bundle.sh: 26: popd: not found
bundle.sh: 29: pushd: not found
mv: cannot move 'libpythonbundle.so' to '../../libs/x86_64': No such file or directory
bundle.sh: 32: popd: not found
Bundling armeabi-v7a
Copying all .so files to /home/appveyor/.pub-cache/hosted/pub.dev/serious_python_android-0.7.0/android/src/main/jniLibs
Font asset "CupertinoIcons.ttf" was tree-shaken, reducing it from 283452 to 912 bytes (99.7% 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.
Caught exception: Already watching path: /home/appveyor/flutter/packages/flutter_tools/gradle
Running Gradle task 'assembleRelease'...                           481.6s
✓  Built build/app/outputs/flutter-apk/app-release.apk (138.6MB).
OK
Copying build to build/apk directory...OK
Deleting Flutter bootstrap directory /tmp/flet_flutter_build_QrRqmqoGjn
Success!

Error message

No response

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

[Vallekralle]

Hi jaluscg,

I had the same issue with my mobile app when I used "wrong" or too many modules in my requirements.txt file. Could you please upload all your modules, which you included in your requirements.txt file?

Thank you, stay safe and have fun programming!

[jaluscg]

requirements.txt

I only included Flet as the sole module, and I only added two routes to the project, but I still get the white screen T^T. This is the code I have:

https://github.com/jaluscg/FletSheet/tree/main