Global varible/objetct isn't being shared between multiple files on Android, while the same code works normally under Windows.

[killangell]

Checklist

• the issue is indeed a bug and not a support request
• issue doesn't already exist: https://github.com/kivy/python-for-android/issues
• I have a short, runnable example that reproduces the issue
• I reproduced the problem with the latest development version (p4a.branch = develop)
• I used the grave accent (aka backticks) to format code or logs when appropriated

Versions

• Python: 3.8
• OS: Android 10
• Kivy:
• Cython: 0.29.19
• OpenJDK: jdk1.8.0_301

Description

A.py including a global variable, say x = 1.
B.py: import A, then print(A.x), it's correct, but if sometime when A.x got updated in A.py, A.x in B.py didn't get updated.

The same code works correctly under windows but doesn't work on android.

buildozer.spec

Command:

// REPLACE ME: buildozer command ran? e.g. buildozer android debug
// Keep the triple grave accent (aka backquote/backtick) to have the code formatted

Spec file:

// REPLACE ME: Paste your buildozer.spec file here

Logs

// REPLACE ME: Paste the build output containing the error
// Keep the triple grave accent (a.k.a. backquote/backtick) to have the code formatted

[inclement]

Python isn't running differently on Android in any way that I'd expect to cause this mismatch. I think it's more likely that there's an issue with your code that manifests differently for a reason other than the platform change.

If you want to prove this is a real issue, please provide a minimal app example that reproduces the issue. We'll certainly log the bug if we can see this way that something is wrong.

[killangell]

If you want to prove this is a real issue, please provide a minimal app example that reproduces the issue. We'll certainly log the bug if we can see this way that something is wrong.

You are right, it looks that it's not an issue of python for android, but for global variable sharing between android service and activity, though those are python code, but global variable is losing sync up between them.
Any suggestion for such situation?

[inclement]

The service and activity are running separate python processes that don't share memory, if you want to pass messages you should do so explicitly with e.g. oscpy.