Java tutorial
/** * The MIT License * * Copyright (c) 2013 Mark Nutter * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.cbtec.eliademy; import org.json.JSONException; import org.json.JSONObject; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.util.Log; import com.cbtec.eliademy.R; import com.google.android.gcm.GCMBaseIntentService; import com.google.android.gcm.GCMRegistrar; /** * IntentService responsible for handling GCM messages. */ public class GCMIntentService extends GCMBaseIntentService { private static final String TAG = "GCMIntentService"; public GCMIntentService() { super(TAG); } @Override protected void onRegistered(Context context, String registrationId) { Log.d(TAG, "Device registered: regId = " + registrationId); JSONObject json; try { json = new JSONObject().put("event", "registered"); json.put("registrationId", registrationId); Log.v(TAG, json.toString()); GCMPlugin.sendJavascript(json); } catch (JSONException e) { Log.e(TAG, "JSON exception: " + e.getMessage()); } } @Override protected void onUnregistered(Context context, String registrationId) { Log.d(TAG, "Device unregistered"); if (GCMRegistrar.isRegisteredOnServer(context)) { try { JSONObject json; json = new JSONObject().put("event", "unregistered"); json.put("registrationId", registrationId); Log.v(TAG, json.toString()); GCMPlugin.sendJavascript(json); } catch (JSONException e) { Log.e(TAG, "JSON exception" + e.getMessage()); } } else { // This callback results from the call to unregister made on // ServerUtilities when the registration to the server failed. Log.d(TAG, "Ignoring unregister callback"); } } @Override protected void onMessage(Context context, Intent intent) { Bundle extras = intent.getExtras(); Log.d(TAG, "Received message" + extras.toString()); if (extras != null) { try { JSONObject json; json = new JSONObject().put("event", "notifications"); json.put("notifications", extras.getString("notifications")); Log.v(TAG, json.toString()); if (GCMPlugin.isActive()) { // TODO: Find better way JSONObject msgobj = new JSONObject(extras.getString("notifications")); String msg = msgobj.getString("author") + " " + msgobj.getString("content") + " for course " + msgobj.getString("coursename"); generateNotification(context, msg); GCMPlugin.sendJavascript(json); } else { // form message JSONObject msgobj = new JSONObject(extras.getString("notifications")); String msg = msgobj.getString("author") + " " + msgobj.getString("content") + " for course " + msgobj.getString("coursename"); generateNotification(context, msg); } } catch (JSONException e) { Log.e(TAG, "JSON exception" + e.getMessage()); } } } @Override protected void onDeletedMessages(Context context, int total) { Log.d(TAG, "Received deleted messages notification"); } @Override public void onError(Context context, String error) { Log.d(TAG, "Received error: " + error); try { JSONObject json; json = new JSONObject().put("event", "error"); json.put("error", error); GCMPlugin.sendJavascript(json); } catch (JSONException e) { Log.e(TAG, "JSON exception" + e.getMessage()); } } @Override protected boolean onRecoverableError(Context context, String error) { Log.d(TAG, "Received recoverable error: " + error); return super.onRecoverableError(context, error); } //Samples : https://code.google.com/p/gcm/source/browse/samples/gcm-demo-client/src/com/google/android/gcm/demo/app/GCMIntentService.java /* * Copyright 2012 Google Inc. * * 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. */ /** * Issues a notification to inform the user that server has sent a message. */ private static void generateNotification(Context context, String message) { int icon = R.drawable.icon; long when = System.currentTimeMillis(); NotificationManager notificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); Notification notification = new Notification(icon, message, when); String title = context.getString(R.string.app_name); Intent notificationIntent = new Intent(context, Eliademy.class); // set intent so it does not start a new activity notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP); PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0); notification.setLatestEventInfo(context, title, message, intent); notification.flags |= Notification.FLAG_AUTO_CANCEL; notificationManager.notify(0, notification); } }