Pyjnius import jar file

Question

Pyjnius allows you to create a python wrapper for java classes like:

Hardware = autoclass('org.myapp.Hardware')

Is there a way to import an existing *.jar file like that? What does the syntax look like?

Macintosh

Answer 1

As much as jar file relevant only for android, you need to add jar file in your buildozer.spec like

android.add_jars = java/myjar.jar

and in your App's build method

from kivy.utils import platform
...
if platform() == 'android':
    BlaClass = autoclass('java.bla.BlaClass')
...

Macintosh

I just want to use some classes provided in some external jars in my python script. Is it not possible using jars which are not related to android? – Lucio

it depends on what you want to achieve. maybe jython would work for you – Macintosh

Answer 2

You can add the jar into CLASSPATH, then import pyjnius and use autoclass as normal :-):

import os
os.environ['CLASSPATH'] = "path/to/your.jar"

from jnius import autoclass


Bla = autoclass('bla.bla.BlaClass')

Mcchesney

What if i have more than 1 jar file , how i can include them ? – Timothytimour

by separating them with : I would assume – Am‚lie

A slightly cleaner equivalent would be import jnius_config; jnius_config.set_classpath('/path/to/your.jar') – Leboff