What is causing "Error NetworkOnMainThreadException"?

API
1

Hi All

I am creating a simple Android Java program that calls Chat GPT using the API, and am just getting started. This error occurs at the getOutputStream() step.

Please find screenshots attached. I have searched the forums but did not find this issue discussed, and I asked Chat GPT but did not get any new suggestions. Please find screenshots attached.

Any help would be appreciated!

Thanks.

ChatGPT Android Java program screenshot 02Dec2024
ChatGPT Android Java program screenshot 02Dec20241919×1045 296 KB

Please also find the entire MainActivity.java script here:

package com.example.chatgptapp01;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import kotlin.contracts.Returns;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    String conversation;
    try {
        conversation = chatGPT("Hello, how are you?");
    } catch (IOException | JSONException e) {
        throw new RuntimeException(e);
    }

}

private String chatGPT(String s) throws IOException, JSONException {
    String url = "https://api.openai.com/v1/completions";
    HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();

    String API_KEY = "s*...deleted...*A";

    con.setRequestMethod("POST");
    con.setRequestProperty("Content-Type", "application/json");
    con.setRequestProperty("Authorization", "Bearer " + API_KEY);

    JSONObject data = new JSONObject();
    data.put("model", "gpt-3.5-turbo-0301");
    data.put("prompt", s);
    data.put("max_tokens", 2000);
    data.put("temperature", 1.0);

    con.setDoOutput(true);
    Log.d("msg","up to here1");
    con.getOutputStream().write(data.toString().getBytes()); // failing here
    Log.d("msg","up to here2");

    String output = new BufferedReader(new InputStreamReader(con.getInputStream())).lines().reduce((a, b) -> a + b).get();

    System.out.println(new JSONObject(output).getJSONArray("choices").getJSONObject(0).getString("text"));
    return null;
}

}

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