sketchware pro sending http requests

MandyWeb.java

package com.my.newproject;

import java.net.*;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;
import android.os.StrictMode;

public class MandyWeb {
	private static String req_url;
	private static URL url;
    
    public MandyWeb() {
        StrictMode.ThreadPolicy tp = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(tp);
    }

	public String sendGet(String user_url) {
        try {
			URL url = new URL(user_url);

			HttpURLConnection con = (HttpURLConnection) url.openConnection();
			con.setRequestMethod("GET");
			con.setRequestProperty("User-Agent", "Mozilla/5.0 (Linux; Android 13; SM-A515F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Mobile Safari/537.36");

			int responseCode = con.getResponseCode();

			if (responseCode == HttpURLConnection.HTTP_OK) { // success
				BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
				String inputLine;
				StringBuffer response = new StringBuffer();

				while ((inputLine = in.readLine()) != null) {
					response.append(inputLine);
				}

				in.close();

	            return response.toString();
			} else {
				return "GET request did not work.";
			}
        } catch(IOException iex){ 
           return iex.getMessage();
        }

	}

}