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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.nsdchat;
import android.app.Activity;
import android.net.nsd.NsdServiceInfo;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import com.example.android.nsdchat.NsdHelper;
public class NsdChatActivity extends Activity {
NsdHelper mNsdHelper;
private TextView mStatusView;
private Handler mUpdateHandler;
public static final String TAG = "NsdChat";
ChatConnection mConnection;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "Creating chat activity");
setContentView(R.layout.main);
mStatusView = (TextView) findViewById(R.id.status);
mUpdateHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
String chatLine = msg.getData().getString("msg");
addChatLine(chatLine);
}
};
}
public void clickAdvertise(View v) {
// Register service
if(mConnection.getLocalPort() > -1) {
mNsdHelper.registerService(mConnection.getLocalPort());
} else {
Log.d(TAG, "ServerSocket isn't bound.");
}
}
public void clickDiscover(View v) {
mNsdHelper.discoverServices();
}
public void clickConnect(View v) {
NsdServiceInfo service = mNsdHelper.getChosenServiceInfo();
if (service != null) {
Log.d(TAG, "Connecting.");
mConnection.connectToServer(service.getHost(),
service.getPort());
} else {
Log.d(TAG, "No service to connect to!");
}
}
public void clickSend(View v) {
EditText messageView = (EditText) this.findViewById(R.id.chatInput);
if (messageView != null) {
String messageString = messageView.getText().toString();
if (!messageString.isEmpty()) {
mConnection.sendMessage(messageString);
}
messageView.setText("");
}
}
public void addChatLine(String line) {
mStatusView.append("\n" + line);
}
@Override
protected void onStart() {
Log.d(TAG, "Starting.");
mConnection = new ChatConnection(mUpdateHandler);
mNsdHelper = new NsdHelper(this);
mNsdHelper.initializeNsd();
super.onStart();
}
@Override
protected void onPause() {
Log.d(TAG, "Pausing.");
if (mNsdHelper != null) {
mNsdHelper.stopDiscovery();
}
super.onPause();
}
@Override
protected void onResume() {
Log.d(TAG, "Resuming.");
super.onResume();
if (mNsdHelper != null) {
mNsdHelper.discoverServices();
}
}
// For KitKat and earlier releases, it is necessary to remove the
// service registration when the application is stopped. There's
// no guarantee that the onDestroy() method will be called (we're
// killable after onStop() returns) and the NSD service won't remove
// the registration for us if we're killed.
// In L and later, NsdService will automatically unregister us when
// our connection goes away when we're killed, so this step is
// optional (but recommended).
@Override
protected void onStop() {
Log.d(TAG, "Being stopped.");
mNsdHelper.tearDown();
mConnection.tearDown();
mNsdHelper = null;
mConnection = null;
super.onStop();
}
@Override
protected void onDestroy() {
Log.d(TAG, "Being destroyed.");
super.onDestroy();
}
}
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