[PySide] PySide for Android & comprehensive build and usage guide
martin.kolman at gmail.com
Mon Feb 25 00:50:23 CET 2013
24.2.2013 22:55, Stef Mientki:
> On 20-02-13 21:07, robbert wrote:
>>> This basically means, that it is now possible to write Python & PySide
>>> applications that can be installed from standalone APK packages to
>>> non-rooted user devices, just like any other Android application.
>> Great work! This is what I've been waiting for, for a long time.
>> I followed your guide for creating a package (not building PySide).
>> I tried this on two machines, both are able to 'build' a package, and
>> deploy it to the device. Sadly, both packages give the error:
>> "Unfortunately, PySideExample has stopped".
>> (Your precompiled package works nicely)
> indeed a great job. !! but ...
> I tried to run the pre compiled version on Samsung Note-10 (runs
> perfect) and on my Samsung phone S-plus (crashed "Your application
> encountered a fatal error and cannot continue").
> Compiling the package myself, resulted in the same errors as above
> "Unfortunately, PySideExample has stopped".
> Any clue what's the problem ?
The PySide & QtComponents in the example package were compiled against
Android API level  14, which corresponds to Android 4.0. Samsung
S-plus is according to what I've found online running Android 2.3, which
corresponds to API level 9. The API levels are only forward compatible,
meaning API 9 should work on device supporting API 14, but not the reverse.
So the next step is to rebuild PySide & Qt Components in the example
with lower API level - if the build succeeds, the resulting package with
these binaries should work from Android 2.3 all the way to 4.2.
> And in more general, what are the possibilities to debug these kind of
> errors/problems ?
Application startup & the Qt part of the application prints log messages
to the main Android log. This log can be either by an on-device
application  or with using the Android debugger (adb) tool over usb
or network connection. If you have installed the Necessitas SDK, it has
adb in the necessitas/android-sdk/platform-tools folder.
Once you Android device is in debugging mode, just run adb on PC like this:
adb shell logcat
And the Android log should show up in the console.
For stdout & stderr from the Python code, check:
If no such log file exists, the application crashed before the C++
wrapper could start the Python interpreter.
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