Android example source code file (NotifyingService.java)

This example Android source code file (NotifyingService.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, app, application, charsequence, conditionvariable, content, ibinder, mood_notifications, notification, notificationmanager, notifyingservice, os, override, parcel, pendingintent, remoteexception, runnable, thread, ui

The NotifyingService.java Android example source code

/*
 * Copyright (C) 2007 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.apis.app;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.example.android.apis.R;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.ConditionVariable;
import android.os.IBinder;
import android.os.Parcel;
import android.os.RemoteException;
import android.widget.RemoteViews;

/**
 * This is an example of service that will update its status bar balloon 
 * every 5 seconds for a minute.
 * 
 */
public class NotifyingService extends Service {
    
    // Use a layout id for a unique identifier
    private static int MOOD_NOTIFICATIONS = R.layout.status_bar_notifications;

    // variable which controls the notification thread 
    private ConditionVariable mCondition;
 
    @Override
    public void onCreate() {
        mNM = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.
        Thread notifyingThread = new Thread(null, mTask, "NotifyingService");
        mCondition = new ConditionVariable(false);
        notifyingThread.start();
    }

    @Override
    public void onDestroy() {
        // Cancel the persistent notification.
        mNM.cancel(MOOD_NOTIFICATIONS);
        // Stop the thread from generating further notifications
        mCondition.open();
    }

    private Runnable mTask = new Runnable() {
        public void run() {
            for (int i = 0; i < 4; ++i) {
                showNotification(R.drawable.stat_happy,
                        R.string.status_bar_notifications_happy_message);
                if (mCondition.block(5 * 1000)) 
                    break;
                showNotification(R.drawable.stat_neutral,
                        R.string.status_bar_notifications_ok_message);
                if (mCondition.block(5 * 1000)) 
                    break;
                showNotification(R.drawable.stat_sad,
                        R.string.status_bar_notifications_sad_message);
                if (mCondition.block(5 * 1000)) 
                    break;
            }
            // Done with our work...  stop the service!
            NotifyingService.this.stopSelf();
        }
    };

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }
    
    private void showNotification(int moodId, int textId) {
        // In this sample, we'll use the same text for the ticker and the expanded notification
        CharSequence text = getText(textId);

        // Set the icon, scrolling text and timestamp.
        // Note that in this example, we pass null for tickerText.  We update the icon enough that
        // it is distracting to show the ticker text every time it changes.  We strongly suggest
        // that you do this as well.  (Think of of the "New hardware found" or "Network connection
        // changed" messages that always pop up)
        Notification notification = new Notification(moodId, null, System.currentTimeMillis());

        // The PendingIntent to launch our activity if the user selects this notification
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                new Intent(this, NotifyingController.class), 0);

        // Set the info for the views that show in the notification panel.
        notification.setLatestEventInfo(this, getText(R.string.status_bar_notifications_mood_title),
                       text, contentIntent);

        // Send the notification.
        // We use a layout id because it is a unique number.  We use it later to cancel.
        mNM.notify(MOOD_NOTIFICATIONS, notification);
    }

    // This is the object that receives interactions from clients.  See
    // RemoteService for a more complete example.
    private final IBinder mBinder = new Binder() {
        @Override
        protected boolean onTransact(int code, Parcel data, Parcel reply,
                int flags) throws RemoteException {
            return super.onTransact(code, data, reply, flags);
        }
    };

    private NotificationManager mNM;
}