NSDManager示例

package com.example.jinchao.dimenstest;

import android.app.Activity;
import android.content.Context;
import android.net.nsd.NsdManager;
import android.net.nsd.NsdServiceInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class MainActivity extends Activity {

    private static final String TAG = MainActivity.class.getSimpleName();

    private static final int PORT = 5000;
    private TextView result;
    private Button server;
    private Button client;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        result = findViewById(R.id.result);
        server = findViewById(R.id.refresh);
        client = findViewById(R.id.client);

        server.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startNSDServer(getApplicationContext(), "jinchao", 56660);
            }
        });

        client.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                discoveryNSDServer();
            }
        });
    }

    private NsdManager mNsdManager;
    private final String mServerType = "_http._tcp.";

    public void startNSDServer(Context context, String serviceName, int port) {
        mNsdManager = (NsdManager) context.getSystemService(Context.NSD_SERVICE);
        NsdServiceInfo serviceInfo = new NsdServiceInfo();
        serviceInfo.setServiceName(serviceName);
        serviceInfo.setPort(port);
        serviceInfo.setServiceType(mServerType);
        mNsdManager.registerService(serviceInfo, NsdManager.PROTOCOL_DNS_SD, new NsdManager.RegistrationListener() {
            @Override
            public void onRegistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
                Log.d(TAG, "onRegistrationFailed: ");
            }

            @Override
            public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
                Log.d(TAG, "onUnregistrationFailed: ");
            }

            @Override
            public void onServiceRegistered(NsdServiceInfo serviceInfo) {
                Log.d(TAG, "onServiceRegistered: info: " + serviceInfo.toString());
            }

            @Override
            public void onServiceUnregistered(NsdServiceInfo serviceInfo) {
                Log.d(TAG, "onServiceUnregistered: ");
            }
        });
    }

    //发现周边的NSD相关网络
    public void discoveryNSDServer() {
        mNsdManager = (NsdManager) getSystemService(Context.NSD_SERVICE);
        mNsdManager.discoverServices(mServerType, NsdManager.PROTOCOL_DNS_SD, new NsdManager.DiscoveryListener() {
            @Override
            public void onStartDiscoveryFailed(String serviceType, int errorCode) {
                Log.d(TAG, "onStartDiscoveryFailed: serviceType: " + serviceType);
            }

            @Override
            public void onStopDiscoveryFailed(String serviceType, int errorCode) {
                Log.d(TAG, "onStopDiscoveryFailed: serviceType: " + serviceType);
            }

            @Override
            public void onDiscoveryStarted(String serviceType) {
                Log.d(TAG, "onDiscoveryStarted: serviceType: " + serviceType);
            }

            @Override
            public void onDiscoveryStopped(String serviceType) {
                Log.d(TAG, "onDiscoveryStopped: serviceType: " + serviceType);
            }

            @Override
            public void onServiceFound(NsdServiceInfo serviceInfo) {
                Log.d(TAG, "onServiceFound: info: " + serviceInfo.toString());
                resoleServer(serviceInfo);
            }

            @Override
            public void onServiceLost(NsdServiceInfo serviceInfo) {
                Log.d(TAG, "onServiceLost: info: " + serviceInfo.toString());

            }
        });
    }

    public void resoleServer(NsdServiceInfo serviceInfo){

        //第一个参数是扫描得到的对象，第二个参数是解析监听对象
        mNsdManager.resolveService(serviceInfo, new NsdManager.ResolveListener() {
            @Override
            public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
                Log.d(TAG, "onResolveFailed: info: " + serviceInfo + " error: " + errorCode);
            }

            @Override
            public void onServiceResolved(NsdServiceInfo serviceInfo) {
                Log.d(TAG, "onServiceResolved: info: " + serviceInfo.toString());
            }
        });
    }
}