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      1 /*
      2  * Copyright (C) 2007 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.apis.app;
     18 
     19 // Need the following import to get access to the app resources, since this
     20 // class is in a sub-package.
     21 import com.example.android.apis.R;
     22 
     23 import android.app.Notification;
     24 import android.app.NotificationManager;
     25 import android.app.PendingIntent;
     26 import android.app.Service;
     27 import android.content.Intent;
     28 import android.os.Binder;
     29 import android.os.ConditionVariable;
     30 import android.os.IBinder;
     31 import android.os.Parcel;
     32 import android.os.RemoteException;
     33 
     34 /**
     35  * This is an example of service that will update its status bar balloon
     36  * every 5 seconds for a minute.
     37  *
     38  */
     39 public class NotifyingService extends Service {
     40 
     41     // Use a layout id for a unique identifier
     42     private static int MOOD_NOTIFICATIONS = R.layout.status_bar_notifications;
     43 
     44     // variable which controls the notification thread
     45     private ConditionVariable mCondition;
     46 
     47     @Override
     48     public void onCreate() {
     49         mNM = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
     50 
     51         // Start up the thread running the service.  Note that we create a
     52         // separate thread because the service normally runs in the process's
     53         // main thread, which we don't want to block.
     54         Thread notifyingThread = new Thread(null, mTask, "NotifyingService");
     55         mCondition = new ConditionVariable(false);
     56         notifyingThread.start();
     57     }
     58 
     59     @Override
     60     public void onDestroy() {
     61         // Cancel the persistent notification.
     62         mNM.cancel(MOOD_NOTIFICATIONS);
     63         // Stop the thread from generating further notifications
     64         mCondition.open();
     65     }
     66 
     67     private Runnable mTask = new Runnable() {
     68         public void run() {
     69             for (int i = 0; i < 4; ++i) {
     70                 showNotification(R.drawable.stat_happy,
     71                         R.string.status_bar_notifications_happy_message);
     72                 if (mCondition.block(5 * 1000))
     73                     break;
     74                 showNotification(R.drawable.stat_neutral,
     75                         R.string.status_bar_notifications_ok_message);
     76                 if (mCondition.block(5 * 1000))
     77                     break;
     78                 showNotification(R.drawable.stat_sad,
     79                         R.string.status_bar_notifications_sad_message);
     80                 if (mCondition.block(5 * 1000))
     81                     break;
     82             }
     83             // Done with our work...  stop the service!
     84             NotifyingService.this.stopSelf();
     85         }
     86     };
     87 
     88     @Override
     89     public IBinder onBind(Intent intent) {
     90         return mBinder;
     91     }
     92 
     93     private void showNotification(int moodId, int textId) {
     94         // In this sample, we'll use the same text for the ticker and the expanded notification
     95         CharSequence text = getText(textId);
     96 
     97         // Set the icon, scrolling text and timestamp.
     98         // Note that in this example, we pass null for tickerText.  We update the icon enough that
     99         // it is distracting to show the ticker text every time it changes.  We strongly suggest
    100         // that you do this as well.  (Think of of the "New hardware found" or "Network connection
    101         // changed" messages that always pop up)
    102         Notification notification = new Notification(moodId, null, System.currentTimeMillis());
    103 
    104         // The PendingIntent to launch our activity if the user selects this notification
    105         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
    106                 new Intent(this, NotifyingController.class), 0);
    107 
    108         // Set the info for the views that show in the notification panel.
    109         notification.setLatestEventInfo(this, getText(R.string.status_bar_notifications_mood_title),
    110                        text, contentIntent);
    111 
    112         // Send the notification.
    113         // We use a layout id because it is a unique number.  We use it later to cancel.
    114         mNM.notify(MOOD_NOTIFICATIONS, notification);
    115     }
    116 
    117     // This is the object that receives interactions from clients.  See
    118     // RemoteService for a more complete example.
    119     private final IBinder mBinder = new Binder() {
    120         @Override
    121         protected boolean onTransact(int code, Parcel data, Parcel reply,
    122                 int flags) throws RemoteException {
    123             return super.onTransact(code, data, reply, flags);
    124         }
    125     };
    126 
    127     private NotificationManager mNM;
    128 }
    129