Java tutorial
/** * Copyright 2014 iMobilize Ltd. * * 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.imobilize.blogposts.gcmnotifications; import info.androidhive.slidingmenu.R; import org.json.JSONException; import org.json.JSONObject; import android.app.IntentService; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.SystemClock; import android.support.v4.app.NotificationCompat; import android.util.Log; import com.google.android.gms.gcm.GoogleCloudMessaging; import com.imobilize.blogposts.activities.ArticleActivity; import com.imobilize.blogposts.constants.Constants; /** * This {@code IntentService} does the actual handling of the GCM message. * {@code GcmBroadcastReceiver} (a {@code WakefulBroadcastReceiver}) holds a * partial wake lock for this service while the service does its work. When the * service is finished, it calls {@code completeWakefulIntent()} to release the * wake lock. */ public class GcmIntentService extends IntentService { public static final int NOTIFICATION_ID = 1; private NotificationManager mNotificationManager; NotificationCompat.Builder builder; public GcmIntentService() { super("GcmIntentService"); } public static final String TAG = "GCM Demo"; @Override protected void onHandleIntent(Intent intent) { Bundle extras = intent.getExtras(); GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this); // The getMessageType() intent parameter must be the intent you received // in your BroadcastReceiver. String messageType = gcm.getMessageType(intent); if (!extras.isEmpty()) { // has effect of unparcelling Bundle /* * Filter messages based on message type. Since it is likely that GCM will be * extended in the future with new message types, just ignore any message types you're * not interested in, or that you don't recognize. */ if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)) { sendNotification("Send error: " + extras.toString()); } else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)) { sendNotification("Deleted messages on server: " + extras.toString()); // If it's a regular GCM message, do some work. } else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) { Log.i(TAG, "Completed work @ " + SystemClock.elapsedRealtime()); // Post notification of received message. String articleDataString = extras.getString("article_data"); sendNotification(articleDataString); Log.i(TAG, "Received: " + extras.toString()); } } // Release the wake lock provided by the WakefulBroadcastReceiver. GcmBroadcastReceiver.completeWakefulIntent(intent); } // Put the message into a notification and post it. // This is just one simple example of what you might choose to do with // a GCM message. private void sendNotification(String articleDataString) { mNotificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE); JSONObject articleDataJson = null; try { articleDataJson = new JSONObject(articleDataString); } catch (JSONException e) { e.printStackTrace(); } Intent intentForArticleActivity = new Intent(this, ArticleActivity.class); String notificationMessage = null; try { intentForArticleActivity.putExtra(Constants.ARTICLE_TITLE, articleDataJson.getString("title")); intentForArticleActivity.putExtra(Constants.ARTICLE_METADATA, "Posted by " + articleDataJson.getString("author") + " on " + articleDataJson.getString("creationDate")); intentForArticleActivity.putExtra(Constants.ARTICLE_CONTENT, articleDataJson.getString("content")); intentForArticleActivity.putExtra(Constants.ARTICLE_KEY, articleDataJson.getString("key")); notificationMessage = "Read our new article from category " + articleDataJson.getString("categories") + " called '" + articleDataJson.getString("title") + "'"; } catch (JSONException e) { e.printStackTrace(); } PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intentForArticleActivity, PendingIntent.FLAG_UPDATE_CURRENT); NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_gcm) .setAutoCancel(true).setContentTitle("BLOGPOSTS") .setStyle(new NotificationCompat.BigTextStyle().bigText(notificationMessage)) .setContentText(notificationMessage); mBuilder.setContentIntent(contentIntent); mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build()); } }