Build FastAPI app as an Android Service

[fwwucn]

Can I build Python FastAPI app as an Android Service?

e.g. I have a FastAPI app (see below app.py), which hosts a http server, and provides an endpoint which can be called by http request.
I want it to be run on Android device as a background Android Service, in which hosts a http server and provides an endpoint too. Thus another Android app on the same phone can call it by http request.

app.py

from fastapi import FastAPI
from fastapi.responses import Response

app = FastAPI()

@app.get('/health')
async def health() -> Response:
    '''Health check.'''
    return Response(status_code=200)

if __name__=='__main__':
    import uvicorn
    uvicorn.run(app, host='0.0.0.0', port=5000)

I can successfully build it as an AAR with p4a command:

p4a aar --private . --dist-name service --package=com.example.service --name "My Service" --version 1.0 --bootstrap=service_library --requirements=python3 --release --service=app:app.py --arch=arm64-v8a --arch=armeabi-v7a --ignore-setup-py --sdk-dir /home/user/.android/android-sdk --ndk-dir /home/user/.android/android-ndk --android-api=27

The service-release-1.0.aar was generated, and ServiceApp.class can be found in service-release-1.0.aar\classes.jar\com\example\service\. How to load ServiceApp.class and run as a HTTP server?

Or can I build it as an Android Service (APK?), which can be directly installed on Android device?

[fwwucn]

Move to kivy/python-for-android#3033