apk not build using crystax NDK

[sumitmadhwani]

I am building apk using crystax NDK. I am following the same instructions as mentioned in python-for-android documentation.
I am getting following error for the line from kivy.app import App
logs

[KarimReefat]

same issue but with other symbol PyDict_Next in the same module _clock.so
( ImportError: dlopen failed: cannot locate symbol "PyDict_Next" referenced by "_clock.so"... )
my_log.txt
buildozer.txt

[FeralBytes]

Also encountering the same error; identical to @KarimReefat

[FeralBytes]

I think it is actually caused by either buildozer or python-for-android; because it is using cython in a python 2.7 virtualenv and yet we are targeting python 3; thus it should be compiled in a python3 virtual environment.

[FeralBytes]

Planning to modify P4A tonight to use either venv or virtualenv3 aka virtualenv but where
--python=python3.5
Offending line of code is Line Number 327: https://github.com/kivy/python-for-android/blob/master/pythonforandroid/build.py#L327
Posting the details in case some one wants to try before I get to it tomorrow.

[FeralBytes]

Also of note Buildozer is also guilty of forcing python 2.7, so I wll probably have to modify it too Line Number 546: https://github.com/kivy/buildozer/blob/master/buildozer/__init__.py#L546
@inclement you stated you were having an issue too; and you referenced python 3.6, are you using Crystax to compile?

[inclement]

I've been using only crystax for a while, without issues, so I'm not sure what's wrong. The python3 build is quite idiosyncratic though and needs cleaning up, so it's good to have references to ways it's failing for people.

The bit about using a python2.7 virtualenv for python3 builds needs to be fixed, but actually shouldn't in generally stop the build working, as only pure python modules are built this way and most are py2/py3 compatible in the same source code. I've been building python3 apks for a while without any problems of this nature (actually I forgot about this issue!).

With the recent release of python 3.6, it's become particularly important to fix up the python3 build, and I've been doing some preliminary work on this recently. The overall plan is to actually carry the hostpython and targetpython builds, using the build scripts of crystax, rather than using only the prebuilt binaries. I hope that if this is done well, it should both allow support of multiple python versions (in fact, possible most/all recent ones) and make the build more robust for people on different systems. However, things like this always throw up problems, so it's hard to say exactly what will happen when.

[FeralBytes]

@inclement so do you think it is a recent change kivy clock that may be causing the issue then? I have Python 3.5.2. Can you paste your logcat.
Also what exactly should the requirements be at minimum; because I am confused between hostpython3crystax and python3crystax.
Also I found this output from buildozer to be odd:

[INFO]:    Downloading hostpython3crystax
[INFO]:    Skipping hostpython3crystax download as no URL is set
[INFO]:    Downloading python2
[INFO]:    -> running mkdir -p /home/wolfrage/0.Projects/EzTunes/src/EzTunes/.buildozer/android/platform/build/packages/python2
[INFO]:    -> directory context /home/wolfrage/0.Projects/EzTunes/src/EzTunes/.buildozer/android/platform/build/packages/python2
[INFO]:    -> running basename http://python.org/ftp/python/2.7.2/Python-2.7.2.tar.bz2
[INFO]:    -> running rm -f .mark-Python-2.7.2.tar.bz2
[INFO]:    Downloading python2 from http://python.org/ftp/python/2.7.2/Python-2.7.2.tar.bz2

And finally what exactly is hostpython doing; I am trying to close a gap in understanding that is why I am asking.

[inclement]

@FeralBytes Probably not, the kivy clock module is just the first cython one that gets imported so normally it's the one that registers as broken even though they all are.

This setup.py file in the python-for-android testapp builds folders should produce a working python3 build. To use it, you'll need to update the ndk-dir path to point to your own local ndk.

You don't need to add hostpython3crystax, although it's a minor bug that it will apparently be allowed alongside python2 in the requirements.

[FeralBytes]

@inclement worked through getting that file setup for my enviroment; and finally got it to build APK; but upon launching the APK on android; it crashes again as soon as kivy is imported with a failure pointing at _clock.so .
At this time I am unable to build anything with Kivy.

[FeralBytes]

@inclement even tried with the Kivy Hello World Example.

I/python  ( 3069): main.py
I/python  ( 3069): [WARNING] [Config      ] Older configuration version detected (0 instead of 17)
I/python  ( 3069): [WARNING] [Config      ] Upgrading configuration in progress.
I/python  ( 3069): [INFO   ] [Logger      ] Record log in /data/data/com.feralbytes.EzTunes/files/app/.kivy/logs/kivy_70-01-01_0.txt
I/python  ( 3069): [INFO   ] [Kivy        ] v1.9.2.dev0, git-Unknown, 20170131
I/python  ( 3069): [INFO   ] [Python      ] v3.5.0 (default, Dec 24 2015, 05:56:06) 
I/python  ( 3069): [GCC 5.3 20151204]
I/python  ( 3069):  Traceback (most recent call last):
I/python  ( 3069):    File "main.py", line 3, in <module>
I/python  ( 3069):      from kivy.app import App
I/python  ( 3069):    File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/app.py", line 319, in <module>
I/python  ( 3069):      from kivy.base import runTouchApp, stopTouchApp
I/python  ( 3069):    File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/base.py", line 29, in <module>
I/python  ( 3069):      from kivy.clock import Clock
I/python  ( 3069):    File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/clock.py", line 362, in <module>
I/python  ( 3069):      from kivy._clock import CyClockBase, ClockEvent, FreeClockEvent, \
I/python  ( 3069):  ImportError: dlopen failed: cannot locate symbol "PyDict_Next" referenced by "_clock.so"...
I/python  ( 3069): Python for android ended.

Are you currently able to compile anything with Kivy?

[FeralBytes]

By pushing Kivy way back in GIT I was able to get the error to change to:
I/python ( 3379): Traceback (most recent call last):
I/python ( 3379): File "main.py", line 3, in
I/python ( 3379): from kivy.app import App
I/python ( 3379): File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/app.py", line 319, in
I/python ( 3379): from kivy.base import runTouchApp, stopTouchApp
I/python ( 3379): File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/base.py", line 30, in
I/python ( 3379): from kivy.event import EventDispatcher
I/python ( 3379): File "/data/data/com.feralbytes.EzTunes/files/app/crystax_python/site-packages/kivy/event.py", line 8, in
I/python ( 3379): import kivy._event
I/python ( 3379): ImportError: dlopen failed: cannot locate symbol "PyObject_GetAttr" referenced by "_event.so"...
I/python ( 3379): Python for android ended.

Still working backwards.

[FeralBytes]

So that every one is aware; at this time; I have stopped trying Crystax builds and Py3. I just am using my code under Py2; since my code is compatable; that is except python-osc. So I am now going to either switch to Kivy-OSC of port python-osc 3to2.
Either way I believe Crystax builds to be broken at this time. I do not see how to fix it and would need some further help before I even try anything else; already lost too much time to it.