安卓域名解析慢

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class MainActivity extends AppCompatActivity {

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

        // 设置自定义DNS服务器
        setCustomDns("8.8.8.8");

        // 测试域名解析
        testDomainResolution("https://www.example.com");
    }

    private void setCustomDns(String dnsServer) {
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivityManager != null) {
            NetworkRequest.Builder builder = new NetworkRequest.Builder();
            connectivityManager.registerNetworkCallback(builder.build(), new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
                    super.onAvailable(network);
                    try {
                        InetAddress[] addresses = network.getSocketFactory().getInetAddress().getAddress();
                        for (InetAddress address : addresses) {
                            if (address.getHostAddress().equals(dnsServer)) {
                                Log.d("DNS", "Custom DNS set successfully");
                            }
                        }
                    } catch (Exception e) {
                        Log.e("DNS", "Failed to set custom DNS", e);
                    }
                }
            });
        }
    }

    private void testDomainResolution(String url) {
        new Thread(() -> {
            try {
                InetAddress address = InetAddress.getByName(new URL(url).getHost());
                Log.d("DNS", "Resolved IP: " + address.getHostAddress());
            } catch (UnknownHostException e) {
                Log.e("DNS", "Failed to resolve domain", e);
            }
        }).start();
    }
}