android自定义dns解析器

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;

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

public class CustomDnsResolver {
    private static final String TAG = "CustomDnsResolver";
    private Context context;
    private Handler handler;

    public CustomDnsResolver(Context context) {
        this.context = context;
        this.handler = new Handler(Looper.getMainLooper());
    }

    public void resolveDns(String hostname, DnsCallback callback) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkRequest request = new NetworkRequest.Builder()
                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                .build();

        connectivityManager.registerNetworkCallback(request, new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(Network network) {
                super.onAvailable(network);
                new Thread(() -> {
                    try {
                        InetAddress[] addresses = InetAddress.getAllByName(hostname);
                        handler.post(() -> callback.onSuccess(addresses));
                    } catch (UnknownHostException e) {
                        handler.post(() -> callback.onFailure(e.getMessage()));
                    }
                }).start();
            }
        });
    }

    public interface DnsCallback {
        void onSuccess(InetAddress[] addresses);
        void onFailure(String errorMessage);
    }
}