Multiple Phonegap Push Notifications in the Android’s status bar


Last month I worked within an Android project using Phonegap, jQuery Mobile and Push Notifications. I also wrote one post explaining how to use PHP to send the server side’s part of the push notifications. Today I want to show one small hack, that I’ve done to change the default behaviour of push notifications. Let me explain it a little bit:

When you use the Push Plugin “out of the box” you will see one message in your Android’s status bar everytime we send one push notification (and you application isn’t running at this moment). If you click on the notification you application will start and you can handle this notification. But if you send more than one notifications to the device, only the last one will be shown on the status bar. This behaviour can be suitable for most situations, but within my application I wanted to see all the notifications in the status bar until I click on one (then all must disappear). If we want to do that we need to hack a little bit our Phonegap application. Let me show you what I’ve done.

Basically we need to change com.plugin.gcm.GCMIntentService file. If we open this Java file we can see that there’s one constant called: NOTIFICATION_ID and a public function called createNotification with something like that:

public static final int NOTIFICATION_ID = 237;
...

public void createNotification(Context context, Bundle extras)
{
    ...
    mNotificationManager.notify((String) appName, NOTIFICATION_ID, mBuilder.build());

}

I’m not a Java expert, but I notice that if I change this function to:

public static final int NOTIFICATION_ID = 237;
public static int MY_NOTIFICATION_ID = 237;
...

public void createNotification(Context context, Bundle extras)
{
    ...
    MY_NOTIFICATION_ID++;
    mNotificationManager.notify((String) appName, MY_NOTIFICATION_ID, mBuilder.build());

}

Now my android device will show multiple notifications, exactly as I need.

If we need to handle properly the way that our notifications are cancelled we also need to modify the public function cancelNotification

public static void cancelNotification(Context context)
{
    NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    //mNotificationManager.cancel((String)getAppName(context), MY_NOTIFICATION_ID);
    mNotificationManager.cancelAll();
    MY_NOTIFICATION_ID = NOTIFICATION_ID;
}

And that’s all. Multiple notifications as I needed.

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About Gonzalo Ayuso

Web Architect specialized in Open Source technologies. PHP, Python, JQuery, Dojo, PostgreSQL, CouchDB and node.js but always learning.

Posted on September 30, 2013, in android, phonegap, Technology and tagged , , . Bookmark the permalink. 4 Comments.

  1. Thanks for this, definitely what I was looking for. Out of curiosity, any thoughts on how I can have 2 different notifications (instead of them just stacking), i.e. a notification for messages and a notification for alerts? I see with the script you have you use MY_NOTIFICATION_ID++; but when I’m wondering is whether there’s a way to read the message content or info and create the notification ID depending on the contents of the message? Thanks for any guidance.

  2. Nevermind, for anyone who comes across this and is interested it looks like this allowed for multiple different notification ID’s — https://github.com/thenewmr/PushPlugin/commit/728e975442e45668b7d809aec028396a9b023dfa

  3. Hello Gonzalo,
    I had tried this tutorial. But it isn’t working for me?
    Any suggestions???

  1. Pingback: Múltiplas notificações push na barra de status do Android com o Phonegap | iMasters

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