SDL2 built APK not seeming to work

[rayzchen]

Checklist

• [ ] the issue is indeed a bug and not a support request
• [x] issue doesn't already exist: https://github.com/kivy/python-for-android/issues
• [x] I have a short, runnable example that reproduces the issue
• [x] 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