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.app.Activity; 20 import android.net.nsd.NsdServiceInfo; 21 import android.os.Bundle; 22 import android.os.Handler; 23 import android.os.Message; 24 import android.util.Log; 25 import android.view.View; 26 import android.widget.EditText; 27 import android.widget.TextView; 28 29 import com.example.android.nsdchat.NsdHelper; 30 31 public class NsdChatActivity extends Activity { 32 33 NsdHelper mNsdHelper; 34 35 private TextView mStatusView; 36 private Handler mUpdateHandler; 37 38 public static final String TAG = "NsdChat"; 39 40 ChatConnection mConnection; 41 42 /** Called when the activity is first created. */ 43 @Override onCreate(Bundle savedInstanceState)44 public void onCreate(Bundle savedInstanceState) { 45 super.onCreate(savedInstanceState); 46 Log.d(TAG, "Creating chat activity"); 47 setContentView(R.layout.main); 48 mStatusView = (TextView) findViewById(R.id.status); 49 50 mUpdateHandler = new Handler() { 51 @Override 52 public void handleMessage(Message msg) { 53 String chatLine = msg.getData().getString("msg"); 54 addChatLine(chatLine); 55 } 56 }; 57 58 } 59 clickAdvertise(View v)60 public void clickAdvertise(View v) { 61 // Register service 62 if(mConnection.getLocalPort() > -1) { 63 mNsdHelper.registerService(mConnection.getLocalPort()); 64 } else { 65 Log.d(TAG, "ServerSocket isn't bound."); 66 } 67 } 68 clickDiscover(View v)69 public void clickDiscover(View v) { 70 mNsdHelper.discoverServices(); 71 } 72 clickConnect(View v)73 public void clickConnect(View v) { 74 NsdServiceInfo service = mNsdHelper.getChosenServiceInfo(); 75 if (service != null) { 76 Log.d(TAG, "Connecting."); 77 mConnection.connectToServer(service.getHost(), 78 service.getPort()); 79 } else { 80 Log.d(TAG, "No service to connect to!"); 81 } 82 } 83 clickSend(View v)84 public void clickSend(View v) { 85 EditText messageView = (EditText) this.findViewById(R.id.chatInput); 86 if (messageView != null) { 87 String messageString = messageView.getText().toString(); 88 if (!messageString.isEmpty()) { 89 mConnection.sendMessage(messageString); 90 } 91 messageView.setText(""); 92 } 93 } 94 addChatLine(String line)95 public void addChatLine(String line) { 96 mStatusView.append("\n" + line); 97 } 98 99 @Override onStart()100 protected void onStart() { 101 Log.d(TAG, "Starting."); 102 mConnection = new ChatConnection(mUpdateHandler); 103 104 mNsdHelper = new NsdHelper(this); 105 mNsdHelper.initializeNsd(); 106 super.onStart(); 107 } 108 109 110 @Override onPause()111 protected void onPause() { 112 Log.d(TAG, "Pausing."); 113 if (mNsdHelper != null) { 114 mNsdHelper.stopDiscovery(); 115 } 116 super.onPause(); 117 } 118 119 @Override onResume()120 protected void onResume() { 121 Log.d(TAG, "Resuming."); 122 super.onResume(); 123 if (mNsdHelper != null) { 124 mNsdHelper.discoverServices(); 125 } 126 } 127 128 129 // For KitKat and earlier releases, it is necessary to remove the 130 // service registration when the application is stopped. There's 131 // no guarantee that the onDestroy() method will be called (we're 132 // killable after onStop() returns) and the NSD service won't remove 133 // the registration for us if we're killed. 134 135 // In L and later, NsdService will automatically unregister us when 136 // our connection goes away when we're killed, so this step is 137 // optional (but recommended). 138 139 @Override onStop()140 protected void onStop() { 141 Log.d(TAG, "Being stopped."); 142 mNsdHelper.tearDown(); 143 mConnection.tearDown(); 144 mNsdHelper = null; 145 mConnection = null; 146 super.onStop(); 147 } 148 149 @Override onDestroy()150 protected void onDestroy() { 151 Log.d(TAG, "Being destroyed."); 152 super.onDestroy(); 153 } 154 } 155