Post Request from Android client to Flask server

Question

Hello, I've been trying in many ways to send a simple post request from my Android client (programmed in Java) to my Flask server.
The Android app runs on a mobile phone, and the Flask server on another laptop on the LAN.

I gave INTERNET permission in the AndroidManifest and made this method for posting a post request, why doesn't it work? I get no exceptional exceptions in the Logcat btw.

I've also found that the error probably occurs at the first line inside the "try" block.

https://code.sololearn.com/ca3s7bHIdIoY/?ref=app

Answer 1

Once check your base url it's correct. And also check required params are you correct headers verify api
use debugger check api response

Answer 2

Do u have ssl if not have you allowed permission

Answer 3

What u getting in response while hitting api use debugger check line by line

Answer 4

AS Raghuvanshi I used postman with the exact same parameters and it worked. I think there might be something blocking my request, it might be the phone that is not letting traffic out, or my laptop's firewall - I'm not sure.

Answer 5

AS Raghuvanshi I set up a normal Flask server, nothing too complex... didn't use SSL, but I gave INTERNET permission for the Android, and set up "host='0.0.0.0'" in the flask server.
When using postman, I get the desired response. But, the postman is on the same machine as the Flask server, and it's not code on Android.