This is an experimental set of build scripts that will cross-compile Python 3.9.0 for an Android device.
Building requires:
$ANDROID_NDK
points to its root directory. Older NDK may not work and NDK <= r18 is known to be incompatible.python3.9
binary from Python 3.9.0 on the building host. It's recommended to use exactly that Python version, which can be installed via pyenv. Don't forget to check that python3.9
is available in $PATH.tic
binary from ncurses 6.2 on the building host. Slightly newer or older version may also work but no guarantee.Running requires:
./clean.sh
for good measure.ARCH=arm ANDROID_API=21 ./build.sh
to build everything!Download the latest NDK for Linux from https://developer.android.com/ndk/downloads and extract it.
docker run --rm -it -v $(pwd):/python3-android -v /path/to/android-ndk:/android-ndk:ro --env ARCH=arm --env ANDROID_API=21 python:3.9.0-slim /python3-android/docker-build.sh
Here /path/to/android-ndk
should be replaced with the actual for NDK (e.g., /opt/android-ndk
).
Podman is also supported. Simply replace docker
with podman
in the command above.
adb shell
works finebuild
to a folder on the device (e.g., /data/local/tmp/python3
). Note that on most devices /sdcard
is not on a POSIX-compliant filesystem, so the python binary will not run from there.cd /data/local/tmp/build . ./env.sh python3
And have fun!
SSL certificates have old and new naming schemes. Android uses the old scheme yet the latest OpenSSL uses the new one. If you got CERTIFICATE_VERIFY_FAILED
when using SSL/TLS in Python, you need to collect system certificates: (thanks @GRRedWings for the idea)
cd /data/local/tmp/build
mkdir -p etc/ssl
cat /system/etc/security/cacerts/* > etc/ssl/cert.pem
Path for certificates may vary with device vendor and/or Android version. Note that this approach only collects system certificates. If you need to collect user-installed certificates, most likely root access on your Android device is needed.
Check SSL/TLS functionality with:
import urllib.request
print(urllib.request.urlopen('https://httpbin.org/ip').read().decode('ascii'))
No big issues! yay