android局域网域名

import android.net.nsd.NsdManager;
import android.net.nsd.NsdServiceInfo;
import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private NsdManager nsdManager;
    private NsdManager.DiscoveryListener discoveryListener;

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

        nsdManager = (NsdManager) getSystemService(NSD_SERVICE);

        discoveryListener = new NsdManager.DiscoveryListener() {
            @Override
            public void onDiscoveryStarted(String serviceType) {
                Log.d("NSD", "Discovery started");
            }

            @Override
            public void onServiceFound(NsdServiceInfo serviceInfo) {
                Log.d("NSD", "Service found: " + serviceInfo.getServiceName());
            }

            @Override
            public void onServiceLost(NsdServiceInfo serviceInfo) {
                Log.d("NSD", "Service lost: " + serviceInfo.getServiceName());
            }

            @Override
            public void onDiscoveryStopped(String serviceType) {
                Log.d("NSD", "Discovery stopped");
            }

            @Override
            public void onStartDiscoveryFailed(String serviceType, int errorCode) {
                Log.e("NSD", "Start discovery failed: " + errorCode);
            }

            @Override
            public void onStopDiscoveryFailed(String serviceType, int errorCode) {
                Log.e("NSD", "Stop discovery failed: " + errorCode);
            }
        };

        nsdManager.discoverServices("_http._tcp", NsdManager.PROTOCOL_DNS_SD, discoveryListener);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        nsdManager.unregisterServiceDiscoveryListener(discoveryListener);
    }
}