1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.nsdchat; 18 19 import android.content.Context; 20 import android.net.nsd.NsdServiceInfo; 21 import android.net.nsd.NsdManager; 22 import android.util.Log; 23 24 public class NsdHelper { 25 26 Context mContext; 27 28 NsdManager mNsdManager; 29 NsdManager.ResolveListener mResolveListener; 30 NsdManager.DiscoveryListener mDiscoveryListener; 31 NsdManager.RegistrationListener mRegistrationListener; 32 33 public static final String SERVICE_TYPE = "_http._tcp."; 34 35 public static final String TAG = "NsdHelper"; 36 public String mServiceName = "NsdChat"; 37 38 NsdServiceInfo mService; 39 40 public NsdHelper(Context context) { 41 mContext = context; 42 mNsdManager = (NsdManager) context.getSystemService(Context.NSD_SERVICE); 43 } 44 45 public void initializeNsd() { 46 initializeResolveListener(); 47 48 //mNsdManager.init(mContext.getMainLooper(), this); 49 50 } 51 52 public void initializeDiscoveryListener() { 53 mDiscoveryListener = new NsdManager.DiscoveryListener() { 54 55 @Override 56 public void onDiscoveryStarted(String regType) { 57 Log.d(TAG, "Service discovery started"); 58 } 59 60 @Override 61 public void onServiceFound(NsdServiceInfo service) { 62 Log.d(TAG, "Service discovery success" + service); 63 if (!service.getServiceType().equals(SERVICE_TYPE)) { 64 Log.d(TAG, "Unknown Service Type: " + service.getServiceType()); 65 } else if (service.getServiceName().equals(mServiceName)) { 66 Log.d(TAG, "Same machine: " + mServiceName); 67 } else if (service.getServiceName().contains(mServiceName)){ 68 mNsdManager.resolveService(service, mResolveListener); 69 } 70 } 71 72 @Override 73 public void onServiceLost(NsdServiceInfo service) { 74 Log.e(TAG, "service lost" + service); 75 if (mService == service) { 76 mService = null; 77 } 78 } 79 80 @Override 81 public void onDiscoveryStopped(String serviceType) { 82 Log.i(TAG, "Discovery stopped: " + serviceType); 83 } 84 85 @Override 86 public void onStartDiscoveryFailed(String serviceType, int errorCode) { 87 Log.e(TAG, "Discovery failed: Error code:" + errorCode); 88 } 89 90 @Override 91 public void onStopDiscoveryFailed(String serviceType, int errorCode) { 92 Log.e(TAG, "Discovery failed: Error code:" + errorCode); 93 } 94 }; 95 } 96 97 public void initializeResolveListener() { 98 mResolveListener = new NsdManager.ResolveListener() { 99 100 @Override 101 public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) { 102 Log.e(TAG, "Resolve failed" + errorCode); 103 } 104 105 @Override 106 public void onServiceResolved(NsdServiceInfo serviceInfo) { 107 Log.e(TAG, "Resolve Succeeded. " + serviceInfo); 108 109 if (serviceInfo.getServiceName().equals(mServiceName)) { 110 Log.d(TAG, "Same IP."); 111 return; 112 } 113 mService = serviceInfo; 114 } 115 }; 116 } 117 118 public void initializeRegistrationListener() { 119 mRegistrationListener = new NsdManager.RegistrationListener() { 120 121 @Override 122 public void onServiceRegistered(NsdServiceInfo NsdServiceInfo) { 123 mServiceName = NsdServiceInfo.getServiceName(); 124 Log.d(TAG, "Service registered: " + mServiceName); 125 } 126 127 @Override 128 public void onRegistrationFailed(NsdServiceInfo arg0, int arg1) { 129 Log.d(TAG, "Service registration failed: " + arg1); 130 } 131 132 @Override 133 public void onServiceUnregistered(NsdServiceInfo arg0) { 134 Log.d(TAG, "Service unregistered: " + arg0.getServiceName()); 135 } 136 137 @Override 138 public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode) { 139 Log.d(TAG, "Service unregistration failed: " + errorCode); 140 } 141 142 }; 143 } 144 145 public void registerService(int port) { 146 tearDown(); // Cancel any previous registration request 147 initializeRegistrationListener(); 148 NsdServiceInfo serviceInfo = new NsdServiceInfo(); 149 serviceInfo.setPort(port); 150 serviceInfo.setServiceName(mServiceName); 151 serviceInfo.setServiceType(SERVICE_TYPE); 152 153 mNsdManager.registerService( 154 serviceInfo, NsdManager.PROTOCOL_DNS_SD, mRegistrationListener); 155 156 } 157 158 public void discoverServices() { 159 stopDiscovery(); // Cancel any existing discovery request 160 initializeDiscoveryListener(); 161 mNsdManager.discoverServices( 162 SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, mDiscoveryListener); 163 } 164 165 public void stopDiscovery() { 166 if (mDiscoveryListener != null) { 167 try { 168 mNsdManager.stopServiceDiscovery(mDiscoveryListener); 169 } finally { 170 } 171 mDiscoveryListener = null; 172 } 173 } 174 175 public NsdServiceInfo getChosenServiceInfo() { 176 return mService; 177 } 178 179 public void tearDown() { 180 if (mRegistrationListener != null) { 181 try { 182 mNsdManager.unregisterService(mRegistrationListener); 183 } finally { 184 } 185 mRegistrationListener = null; 186 } 187 } 188 } 189
