For a long time I am unable to cross-compile Kivy application to

[Robert]

Moved from  to...@cedro.info's post in another conversation

For a long time I am unable to cross-compile Kivy application to
Android and iOS too. I get APK but it crashes on launch.

https://github.com/kivy/python-for-android/issues/2773

The python bundle is there in the APK. I hoped after last release of
P4A things will get better. But I am unable to run even simple
examples applications!! Now I get some Java crashes tracebacks.

I have tried on Debian 11. Even bought new MacStudio to speed things
up. No change.

There is no solid solution that would make things work (i.e. vm
image). I am wondering how many people are converting their
applications to a mobile with success. Do they use Buildozer (I do) or
their own custom P4A scripts.

This does not look good. Technology change light is shining yellow and
towards red soon.

[Robert]

I looked at your post on GitHub.
The issue seems to be related to the combination of the emulator and the app.
Normally I would suggest using a physical device instead, but there are other issues.

For a sanity check I suggest you build and run Hello World, exactly like this:
https://github.com/Android-for-Python/Android-for-Python-Users#try-hello-world
I hope you will find that it builds and runs just fine.

The example you showed uses a deprecated api. The clue is in the last paragraph here
https://github.com/Android-for-Python/Android-for-Python-Users#basic-pyjnius-usage
If you follow that advice you'll get a message that says the class does not exist.

I took a quick look at the deprecated code you referenced, the first issue I saw was
https://github.com/kivy/python-for-android/blob/develop/pythonforandroid/bootstraps/common/build/src/main/java/org/renpy/android/Hardware.java#L136
And a quick look at the Android docs shows:
https://developer.android.com/reference/android/hardware/Sensor#TYPE_ORIENTATION
Android 15 !!!! Deprecated along time ago.

How an emulator (with no motion sensor hardware) reacts to a long deprecated motion sensor api is hard to say, but it would be surprising if the result were good. The exact failure mechanism I would not choose to guess at.

A little searching and I found the source of the example
https://github.com/kivy/kivy/tree/master/examples/android
The other example uses a deprecated android api too. :(

I filed an issue https://github.com/kivy/kivy/issues/8407

There are some Android examples here (though not a compass)  https://github.com/Android-for-Python/INDEX-of-Examples