PR 2285 breaks requestPermissions

[misl6]

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: Python 3.8.2 (default, Jul 16 2020, 14:00:26)
• OS: Ubuntu 20.04.1 LTS
• Kivy: master
• Cython: 0.29.17
• OpenJDK: 1.8.0_265

Description

After PR #2285 , the app crashes when calling the following instruction.

request_permissions([Permission.ACCESS_COARSE_LOCATION])

buildozer.spec

Command:

buildozer android debug deploy run

Logs

08-27 18:05:07.895 18125 18146 I python  :    File "jnius/jnius_export_class.pxi", line 1134, in jnius.jnius.JavaMultipleMethod.__call__
08-27 18:05:07.896 18125 18146 I python  :  jnius.jnius.JavaException: No methods matching your arguments, requested: (['android.permission.ACCESS_COARSE_LOCATION'],), available: []
08-27 18:05:07.896 18125 18146 I python  : Python for android ended.

[obfusk]

Relevant pyjnius issue: kivy/pyjnius#538.

[obfusk]

This seems to be a bug in p4a's android library.

It looks like python_activity.requestPermissions is a non-static method. But it's being called as if it were static. Which for some reason used to work with older versions of pyjnius. Using python_activity.mActivity.requestPermissions instead seems to work with 1.3.0.

I'm not sure whether the best way to fix this is to make the method static (if that doesn't break anything) or to call it on the instance. And I suspect there are more cases where this happens.