android域名解析时间

import android.os.AsyncTask;
import android.util.Log;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class DNSResolver extends AsyncTask<String, Void, Long> {
    private static final String TAG = "DNSResolver";

    @Override
    protected Long doInBackground(String... params) {
        String domain = params[0];
        long startTime = System.currentTimeMillis();
        try {
            InetAddress address = InetAddress.getByName(domain);
            long endTime = System.currentTimeMillis();
            return endTime - startTime;
        } catch (UnknownHostException e) {
            Log.e(TAG, "DNS resolution failed for domain: " + domain, e);
            return -1L;
        }
    }

    @Override
    protected void onPostExecute(Long result) {
        if (result != -1L) {
            Log.d(TAG, "DNS resolution time: " + result + " ms");
        } else {
            Log.d(TAG, "DNS resolution failed");
        }
    }
}