This page is about creating new bootstrap backends. For build options of existing bootstraps (i.e. with SDL2, Webview, etc.), see build options.

python-for-android (p4a) supports multiple bootstraps. These fulfill a similar role to recipes, but instead of describing how to compile a specific module they describe how a full Android project may be put together from a combination of individual recipes and other components such as Android source code and various build files.

This page describes the basics of how bootstraps work so that you can create and use your own if you like, making it easy to build new kinds of Python projects for Android.

Creating a new bootstrap#

A bootstrap class consists of just a few basic components, though one of them must do a lot of work.

For instance, the SDL2 bootstrap looks like the following:

from pythonforandroid.toolchain import Bootstrap, shprint, current_directory, info, warning, ArchAndroid, logger, info_main, which
from os.path import join, exists
from os import walk
import glob
import sh

class SDL2Bootstrap(Bootstrap):
    name = 'sdl2'

    recipe_depends = ['sdl2']

    def run_distribute(self):
        # much work is done here...

The declaration of the bootstrap name and recipe dependencies should be clear. However, the run_distribute method must do all the work of creating a build directory, copying recipes etc into it, and adding or removing any extra components as necessary.

If you’d like to create a bootstrap, the best resource is to check the existing ones in the p4a source code. You can also contact the developers if you have problems or questions.