android由域名获取ip

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

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

public class DNSResolver extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... params) {
        String domain = params[0];
        try {
            InetAddress inetAddress = InetAddress.getByName(domain);
            return inetAddress.getHostAddress();
        } catch (UnknownHostException e) {
            Log.e("DNSResolver", "Unable to resolve domain: " + domain, e);
            return null;
        }
    }

    @Override
    protected void onPostExecute(String ipAddress) {
        if (ipAddress != null) {
            Log.d("DNSResolver", "IP Address: " + ipAddress);
        } else {
            Log.d("DNSResolver", "Failed to resolve IP address");
        }
    }
}

new DNSResolver().execute("www.example.com");

<uses-permission android:name="android.permission.INTERNET"/>

if (ContextCompat.checkSelfPermission(this, Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.INTERNET}, REQUEST_CODE);
}