手机app需要域名

import android.os.AsyncTask;
import android.util.Log;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class DomainRequestTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... params) {
        String urlString = params[0];
        try {
            URL url = new URL(urlString);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String inputLine;
            StringBuilder content = new StringBuilder();
            while ((inputLine = in.readLine()) != null) {
                content.append(inputLine);
            }
            in.close();
            connection.disconnect();
            return content.toString();
        } catch (Exception e) {
            Log.e("DomainRequestTask", e.getMessage());
            return null;
        }
    }

    @Override
    protected void onPostExecute(String result) {
        if (result != null) {
            Log.d("DomainRequestTask", "Response: " + result);
        } else {
            Log.d("DomainRequestTask", "Failed to fetch data");
        }
    }
}