Troubleshooting¶

Debug output¶

Add the --debug option to any python-for-android command to see full debug output including the output of all the external tools used in the compilation and packaging steps.

If reporting a problem by email or irc, it is usually helpful to include this full log, via e.g. a pastebin or Github gist.

Getting help¶

python-for-android is managed by the Kivy Organisation, and you can get help with any problems using the same channels as Kivy itself:

• by email to the kivy-users Google group
• by irc in the #kivy room at irc.freenode.net

If you find a bug, you can also post an issue on the python-for-android Github page.

Debugging on Android¶

When a python-for-android APK doesn’t work, often the only indication that you get is that it closes. It is important to be able to find out what went wrong.

python-for-android redirects Python’s stdout and stderr to the Android logcat stream. You can see this by enabling developer mode on your Android device, enabling adb on the device, connecting it to your PC (you should see a notification that USB debugging is connected) and running adb logcat. If adb is not in your PATH, you can find it at /path/to/Android/SDK/platform-tools/adb, or access it through python-for-android with the shortcut:

python-for-android logcat

or:

python-for-android adb logcat

Running logcat command gives a lot of information about what Android is doing. You can usually see important lines by using logcat’s built in functionality to see only lines with the python tag (or just grepping this).

When your app crashes, you’ll see the normal Python traceback here, as well as the output of any print statements etc. that your app runs. Use these to diagnose the problem just as normal.

The adb command passes its arguments straight to adb itself, so you can also do other debugging tasks such as python-for-android adb devices to get the list of connected devices.

For further information, see the Android docs on adb, and on logcat in particular.

Common errors¶

The following are common errors that can arise during the use of python-for-android, along with solutions where possible.