SDL2 built APK not seeming to work

[rayzchen]

Checklist

• the issue is indeed a bug and not a support request
• issue doesn't already exist: https://github.com/kivy/python-for-android/issues
• I have a short, runnable example that reproduces the issue
• I reproduced the problem with the latest development version (p4a.branch = develop)
• I used the grave accent (aka backticks) to format code or logs when appropriated

Versions

• Python: 3.10.5
• OS: Ubuntu Linux
• Kivy: Not used
• Cython: 0.29.30
• OpenJDK: 1.11.0

Description

I'm trying to make an SDL2 app. When I install the apk, the kivy loading screen shows and then it changes to landscape mode with a reduced resolution, then just stays as a black screen until the app is closed.

buildozer.spec

Not used

Command:

docker build -t testapp .
docker run -it testapp

Spec file:

Not used 

Dockerfile:

FROM python:latest

RUN dpkg --add-architecture i386 && \
    apt-get update && \
    # apt-get install -y software-properties-common && \
    # add-apt-repository "deb http://security.debian.org/debian-security stretch/updates main" && \
    # apt-get update && \
    apt-get install -y \
        wget \
        curl \
        unzip \
        make \
        zip \
        openjdk-11-jdk \
        build-essential \
        ccache \
        git \
        zlib1g-dev \
        ant \
        ccache \
        autoconf \
        libtool \
        libssl-dev \
        libncurses5:i386 \
        libstdc++6:i386 \
        zlib1g:i386 \
    && rm -rf /var/lib/apt/lists/*

RUN pip install --no-cache-dir git+https://github.com/kivy/python-for-android.git@develop pysdl2 pysdl2-dll cython

WORKDIR /root/app
RUN wget https://raw.githubusercontent.com/kivy/python-for-android/develop/ci/makefiles/android.mk
RUN make -f android.mk

RUN update-java-alternatives -s /usr/lib/jvm/java-1.11.0-openjdk-amd64/

COPY main.py .p4a .
RUN p4a create
CMD p4a apk \
    --private . \
    --package org.example.test \
    --name "My application" \
    --version 0.1.0

main.py:

import sdl2.ext
sdl2.ext.init()
window = sdl2.ext.Window("Hello World!", size=(960, 540))
sdl2.ext.draw.fill(window.get_surface(), (255, 0, 0))
window.show()
processor = sdl2.ext.TestEventProcessor()
processor.run(window)
sdl2.ext.quit()

.p4a file:

--bootstrap=sdl2
--requirements=python3,pysdl2
--arch arm64-v8a
--sdk-dir /root/.android/android-sdk
--ndk-dir /root/.android/android-ndk

Logs

// REPLACE ME: Paste the build output containing the error
// Keep the triple grave accent (a.k.a. backquote/backtick) to have the code formatted

[github-actions]

👋 @rayzchen,
Sorry to hear you are having difficulties with Kivy's python-for-android; Kivy unites a number of different technologies, so building apps can be temperamental.
We try to use GitHub issues only to track work for developers to do to fix bugs and add new features to python-for-android.
However, this issue appears to be a support request. Please use our support channels to get help with the project.
If you're having trouble installing python-for-android, please see our quickstart guide.
If you're having trouble using python-for-android, please see our troubleshooting guide and FAQ.
Let us know if this comment was made in error, and we'll be happy to reopen the issue.