Develop Reference

Android removing notification data in group notification when new notification is added to the group

My group notifications are working fine, however, I noticed that after a couple of hours (When not using the device for a while) when a new notification comes, the message content disappears when the notification is expanded, that is, setStyle(new NotificationCompat.BigTextStyle().bigText()) text disappears. I know it is not a request code issue, as all request code are unique and I am able to reply to the notifications as normal.
One thing to note, after the notification disappears, the next notification that comes, if the device is active (not necessarily the app), that notification will display its normal text when expanded. This seems to occur only when the device AND/OR App is not in use for a while. Is this an android system problem?
Below is picture snap shot to describe the behavior:
First notification
Second notification comes in.
Expanding both notifications, as you can see all of the messages for both of them disappears.
Code: Note that I only send summary notification once.
// Normal notification
int uniqueRequestCode = RandomUser.getUniqueRequestCode();
PendingIntent pendingIntent = PendingIntent.getActivity(
this, uniqueRequestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Notificatio notification = new NotificationCompat.Builder(getApplicationContext(), MESSAGE_CHANNEL_ID)
.setSmallIcon(R.drawable.ne1_white_logo_crop)
.setContentTitle(title)
.setContentText(body)
.setStyle(new NotificationCompat.BigTextStyle().bigText(body))
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
// Set the intent that will fire when the user taps the notification
.setContentIntent(pendingIntent)
.addAction(action)
.setGroup(GROUP_KEY_MESSAGE)
//.setGroupAlertBehavior(groupAlert)
.setColor(Color.BLACK)
.setAutoCancel(true)
.build();
// Summary notification
uniqueRequestCode = RandomUser.getUniqueRequestCode();
PendingIntent pendingIntent = PendingIntent.getActivity(
this, uniqueRequestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Notification summaryNotification = new NotificationCompat.Builder(this, MESSAGE_CHANNEL_ID)
.setSmallIcon(R.drawable.ne1_white_logo_crop)
// Specify which group this notification belongs to
.setGroup(GROUP_KEY_MESSAGE)
// Set this notification as the summary for the group
.setGroupSummary(true)
.setContentIntent(pendingIntent)
.build();

According to this stack overflow answer, Android by default only allows one notification to be expanded.
What I have been using now which is sufficient, and preserves expanding notification is .setStyle(new Notification.MessagingStyle.... I highly advise using MessagingStyle for situations where you want multiple notifications in a group to be expanded. As for BigTextStyle().bigText(), I am not sure of the proper procedure, so I have abandoned it.

clicking on group of notification is not redirecting to specific screen, instead of that app is restarted in oreo

I have implemented firebasse notification functionality in my chat app and everything is running fine but now while testing in Android os 8.0 and 8.1 when app is in background and if user is getting 4 or more than 4 notification then its combined in group and when user click on group then not getting intent and app is restarted.
If user tap on single notification then I am able to send him in specific screen.
I want Notification data or chat id so I can send him in specific screen but not getting any data in intent.
I have searched similar kind of question in stackoverflow but still not getting proper result.
Android: Clicking Grouped Notifications Restarts App
How to open non-launcher activity on notification group click

You can use setContentIntent to set the value of Intent like below
Intent intent = new Intent(this, SecondActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.your_notification_icon)
.setContentTitle("Notification Title")
.setContentText("Notification ")
.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, mBuilder.build());
It will open SecondActivity (Replace the SecondActivity with your own activity)

I am having the same issue causing app restart in Oreo, after many tries i noticed that if when creating the notification i call .setGroup(string) the system no longer groups the notifications.I am creating the notifications from a service. This is not a solution i know but not grouping is a lesser evil than app restart.

Android app doesn't open required activity instead it opens other

Help me out friends I have been facing a problem from a week
I have made an android app in which I got 3 activities named
MainActivity
NotificationListActivity
NotificationActivity
other than that I have 2 services in my app ( as because I am using FCM )
JLZFirebaseMsgService
JLZInstanceIdService
in JLZFirebaseMsgService.java I have written the code
private void sendNotification(String messageBody) {
Intent intent = new Intent(this,NotificationActivity.class);
// intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("Jee Lo Zindagi 2.0")
.setContentText(messageBody)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
}
what I want is to whenever FCM server sends the notification to the devices the app should open NotificationActivity as the I wrote
but whenever I tap on the notification it opens the MainActivity I don't know why.
when the app is open the notification comes and by tapping on it we go to the NotificationActivity that's what I wanted but not the same scenario when the app is closed.
but sometimes it happens that the app shows the correct activity by tapping on the notification I still don't know why.

You should use "data" insted of "notification" on your server code
When you use "notification" on your server code
while you app is not running the JLZFirebaseMsgService.java does not start . instead the you will recevie a notification with your launcher icon
But if you use "data" on your server code your messaging service will start

It seems that you are sending a notification messages, these are messages that go to onMessageReceived when your app is in the foreground in your case that will result in you manually generating a notification, when your app is in the background it will result in an auto-generated notification that your code does not define.
If you are using the FCM REST API then you can use the click_action field which would allow you to define which activity would be launched when the user taps on the notification. If you are using the Firebase console there currently you cannot specify a click_action from there.

Notification using setFullScreenIntent() for BigTextStyle opening Activity automatically

I have a very strange issue, I am working on Push Notification and it was successfully implemented but when i have used BigTextStyle in Notification to show a long message in notification area with setFullScreenIntent() method then the issue coming up the Notification opening the Activity automatically which is set in PendingIntent.
If I don't use setFullScreenIntent() then notification won't opening Activity automatically the user has to tap or click on Notification to open the Activity set in PendingIntent.
So there are two codes
Without setFullScreenIntent() working fine and not opening Activity automatically:
notification = new NotificationCompat.Builder(context)
.setContentTitle("Title")
.setContentIntent(resultPendingIntent)
.setContentText(message)
.setStyle(
new NotificationCompat.BigTextStyle()
.bigText(message))
.setSmallIcon(R.drawable.ic_launcher)
.setAutoCancel(true);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(1, notification.build());
With setFullScreenIntent() also working fine but opening Activity automatically:-
notification = new NotificationCompat.Builder(context)
.setContentTitle("Title")
.setContentIntent(resultPendingIntent)
.setContentText(message)
.setStyle(
new NotificationCompat.BigTextStyle()
.bigText(message))
.setSmallIcon(R.drawable.ic_launcher)
.setFullScreenIntent(resultPendingIntent, true) //Whether true or false same result
.setAutoCancel(true);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(1, notification.build());

public NotificationCompat.Builder setFullScreenIntent (PendingIntent intent, boolean highPriority)
An intent to launch instead of posting the notification to the status
bar. Only for use with extremely high-priority notifications demanding
the user's immediate attention, such as an incoming phone call or
alarm clock that the user has explicitly set to a particular time. If
this facility is used for something else, please give the user an
option to turn it off and use a normal notification, as this can be
extremely disruptive.
On some platforms, the system UI may choose to display a heads-up
notification, instead of launching this intent, while the user is
using the device.
Parameters
intent: The pending intent to launch.
highPriority: Passing
true will cause this notification to be sent even if other
notifications are suppressed.
Found here. As you can see it immediately launches the intent. I don't really know in what case you wanted to use setFullScreenIntent()?
A notification won't automatically expand when a static notification is displayed on top (could be custom bar with wifi, bluetooth and sound control)

pass setFullScreenIntent and setContentIntent with different pending intents.
Worked for me. click on Notif will work and autolaunch will stop

How to check which notifications are active in status bar in Android Dev?

I have made an app that sets notifications in the drop-down status bar of Android phones. However, there is a bug in my code (sometimes the notifications are set, sometimes they are not). I want to be able TO CHECK (in the code) IF THE NOTIFICATION IS VISIBLE TO THE USER. (i.e. can the user see the notification in the status bar?).
How can I do this? (Thanks in advance).
Sample code is greatly appreciated.

I want to be able TO CHECK (in the code) IF THE NOTIFICATION IS VISIBLE TO THE USER. (i.e. can the user see
the notification in the status bar?).
How can I do this?
You can't, sorry. Update: Now possible with Android 4.3+ http://developer.android.com/reference/android/service/notification/NotificationListenerService.html#getActiveNotifications()
However, you can always simply cancel() it -- canceling a Notification that is not on-screen is perfectly fine. Conversely, you can always safely call notify() again for the same Notification, and it too will not cause a problem if the Notification is already on-screen.
EDIT:
NotificationManager.getActiveNotifications() was added in API 23 if you don't want to use the NotificationListenerService

Just to put all together. This is how it works
To build a notification,
Notification n = new Notification.Builder(MyService.this)
.setContentTitle("Notification Title")
.setContentText("Notification Message")
.setSmallIcon(R.drawable.myicon).build();
To make a notification sound call setSound() of Notification,
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Notification n = new Notification.Builder(MyService.this)
.setContentTitle("Notification Title")
.setContentText("Notification Message")
.setSound(alarmSound)
.setSmallIcon(R.drawable.myicon).build();
To cancel the notification after user selected and launched the receiver Intent, call setAutoCancel(),
Notification n = new Notification.Builder(MyService.this)
.setContentTitle("Notification Title")
.setContentText("Notification Message")
.setSound(alarmSound)
.setAutoCancel(true)
.setSmallIcon(R.drawable.myicon).build();
To make sound/vibrate only once for a particular notification use Notification.FLAG_ONLY_ALERT_ONCE. With this flag, your notification will make sound only once till it gets cancelled and you can call notify() as many times as you want with the notification id. Note that if you call cancel() or if user cancelled the notification or auto cancelled, notify() call will make the notification sound again.
n.flags |= Notification.FLAG_ONLY_ALERT_ONCE; // Dont vibrate or make notification sound
Finally to put the notification on notification panel,
NotificationManager notificationManager =
(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(notification_id, n);
Note that notification_id here is important if you want to use the notification effectively.( to keep single sound/vibration for a notification or to cancel a specific notification).
To cancel a particular notification,
NotificationManager notificationManager =
(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.cancel(notification_id);
You can cancel() a notification even if it doesn't exist or you can call notify() as many times as you want with the same id. Note that calling notify with different id will create new notifications.
So, regardless of whether the notification exist or not, if you call notify() again with the correct notification_id with the Notification.FLAG_ONLY_ALERT_ONCE flag set, you can keep your notification alive without disturbing the user with repeated sounds.

You need to set an id for each notification you make.
so you make a notification ..
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, notId + selectedPosition, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, rightNow.getTimeInMillis() - offset, pendingIntent);
Notification notification = new Notification(R.drawable.icon, "TVGuide Υπενθύμιση", System.currentTimeMillis());
NotificationManager manger = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
notification.setLatestEventInfo(context, "Κανάλι: " + b.getString("channel"), "Εκπομπή: " + showname, pendingIntent);
manger.notify(notId, notification);
to clear it..
PendingIntent pendingIntent = PendingIntent.getBroadcast(context,notId, intent, 0);
pendingIntent.cancel();
and to check if active..( existAlarm returns null if no pending intent available)
public PendingIntent existAlarm(int id) {
Intent intent = new Intent(this, alarmreceiver.class);
intent.setAction(Intent.ACTION_VIEW);
PendingIntent test = PendingIntent.getBroadcast(this, id + selectedPosition, intent, PendingIntent.FLAG_NO_CREATE);
return test;
}
So everything comes down to initialize an ID for each notification and how you make it unique.

A new method is introduced to the NotificationManager class in API 23:
public StatusBarNotification[] getActiveNotifications()

There exists a flag for that.
Notification notification = new Notification(icon, tickerText, when);
notification.flags |= Notification.FLAG_ONLY_ALERT_ONCE;
FLAG_ONLY_ALERT_ONCE:
...should be set if you want the sound and/or vibration play each time the notification is sent, even if it has not been canceled before that.
Although, the notification will blink when it is sent again, but there won't be any sound or vibration.

It's possible now to check notifications outstanding in android 4.3 upwards
See here:
http://developer.android.com/reference/android/service/notification/NotificationListenerService.html#getActiveNotifications()

It seems that from Android M (API 23) it is possible to get your process like that, without using NotificationListenerService nor requiring additional permissions:
notificationManager.getActiveNotifications()

As of Android Marshmallow (API 23), you can recover a list of active notifications posted by your app. This NotificationManager method is getActiveNotifications(). More info here: https://developer.android.com/reference/android/app/NotificationManager.html#getActiveNotifications()