Category Archives: WSU CS

JellyBean Notification with Backwards Compatibility

Using NotificationCompa from android.support.v4.app allows for backwards compatibility when creating notifications for your Android app. Bellow is a class that defines two basic methods for the notifications, however at this point it should be easy to go trough the documentation, and call the extra methods to set more things–even using the new android Jelly Bean notification goodies– for example the second method creates a persistent notification by setting onGoing flag true.

Speaking of flags:

//you can NOT set flags directly like
notification.flags |= Notification.FLAG_AUTO_CANCEL;
//you have to use the methods in NotificationCompat.Builder
builder.setAutoCancel(true);

Things of note in the code is that in Notification notification = builder.getNotification(); notification is still a Notification object and not a NotificationCompat object, however the builder was defined as a NotificationCompat.Builder, this is helpful because the NotificationManager.notify() only accepts Notification objects.

package edu.worcester.cs499summer2012.service;

import edu.worcester.cs499summer2012.R;
import edu.worcester.cs499summer2012.activity.ViewTaskActivity;
import edu.worcester.cs499summer2012.task.Task;

import android.app.Notification;
import android.os.Build;
import android.support.v4.app.NotificationCompat;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;

/**
 * Creates Notifications using NotificationCompat to allow for
 * comparability though different API levels
 * 
 * @author Dhimitraq Jorgji
 *
 */
public class NotificationHelper{
	/**
	 * Basic Text Notification for Task Butler, using NotificationCompat
	 * @param context 
	 * @param id id of task, call task.getID() and pass it to this parameter
	 */
	public void sendBasicNotification(Context context, Task task) {
		NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
			.setContentText(task.getName())
			.setContentTitle(context.getText(R.string.app_name))
			.setSmallIcon(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? 
					R.drawable.ic_notification : R.drawable.ic_notification_deprecated)
			.setAutoCancel(true)
			.setContentIntent(getPendingIntent(context, task.getID()))
			.setWhen(System.currentTimeMillis())
			.setDefaults(Notification.DEFAULT_ALL);
		Notification notification = builder.getNotification();
		NotificationManager notificationManager = getNotificationManager(context);
		notificationManager.notify(task.getID(), notification);
	}
	/**
	 * Basic Text Notification with Ongoing flag enabled for Task Butler, using NotificationCompat
	 * @param context 
	 * @param id id of task, call task.getID() and pass it to this parameter
	 */
	public void sendPersistentNotification(Context context, Task task) {
		NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
			.setContentText(task.getName())
			.setContentTitle(context.getText(R.string.app_name))
			.setSmallIcon(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? 
					R.drawable.ic_notification : R.drawable.ic_notification_deprecated)
			.setAutoCancel(true)
			.setContentIntent(getPendingIntent(context,task.getID()))
			.setWhen(System.currentTimeMillis())
			.setOngoing(true)
			.setDefaults(Notification.DEFAULT_ALL);
		Notification notification = builder.getNotification();
		NotificationManager notificationManager = getNotificationManager(context);
		notificationManager.notify(task.getID(), notification);
	}
	//get a PendingIntent
	PendingIntent getPendingIntent(Context context, int id) {
		Intent intent =  new Intent(context, ViewTaskActivity.class)
			.putExtra(Task.EXTRA_TASK_ID, id);
		return PendingIntent.getActivity(context, id, intent, 0);
	}
	//get a NotificationManager
	NotificationManager getNotificationManager(Context context) {
		return (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
	}
}

All of the source code for Task Butler can be found on GitHub, including the above code.

Any questions shoot away in the comments bellow.

From the blog Live and Code » WSU CS by dhimitraq and used with permission of the author. All other rights reserved by the author.

Great Meeting the Other day

Synergy! haha, Jon Dhimitri and I met up on Thursday to discuss the final process in the app. I figured since Dhimitri has that little netbook that he can’t do much with that I would bring a VGA cable to the library and set my laptop up on the big screen. I’ll remember not to listen to Dhimitri though because the VGA cable wouldn’t fit so I had to run back and grab an HDMI, the result:

It actually worked out really well, and I wish we had started doing it earlier. We used My/Jon’s laptop and were able to solve a problem in Dhimitri’s ViewCalendarActivity which turned out to be some weird problem with using .get__() (it was a call to a different class outside the package) which it didn’t like and wouldn’t allow the calendar to move more than a month away.

The meeting lasted a pretty long time where we discussed where the app was going and who was testing it. I suggested we use r/androidDev from Reddit considering we would definitely get some feedback from knowledgeable app devs who are happy to help. I think it might be a good idea to get some freshmen CS students into the testing too, I’ll email whomever is doing 101/140 this year and ask.

The app is looking awesome, excited for these next few weeks.