安卓域名设置

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 HttpGetTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... params) {
        HttpURLConnection connection = null;
        BufferedReader reader = null;
        try {
            URL url = new URL(params[0]);
            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();

            InputStream inputStream = connection.getInputStream();
            StringBuilder buffer = new StringBuilder();
            if (inputStream == null) return null;
            reader = new BufferedReader(new InputStreamReader(inputStream));

            String line;
            while ((line = reader.readLine()) != null) {
                buffer.append(line).append("\n");
            }

            if (buffer.length() == 0) return null;
            return buffer.toString();
        } catch (IOException e) {
            Log.e("HttpGetTask", "Error ", e);
            return null;
        } finally {
            if (connection != null) {
                connection.disconnect();
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (final IOException e) {
                    Log.e("HttpGetTask", "Error closing stream", e);
                }
            }
        }
    }
}