Develop Reference

Set Firebase Notification to appear as Popup like whatsapp in Android studio

I am building an social media app in Android studio, this app uses firebase for push notifications, and notifications is working fine, that Is notifications shows on device's notification bar.
How can I change the behavior so that the notification can appear as popup when app is in foreground?
I want a persistent kind of notification, something like WhatsApp that can stay on top other apps so that users can quickly open notification on wherever they are on their phone.
On my research, the best i could get was to use this on my theme
But I do not have Theme.Holo.Dialog in my style and my aim is that the notification should appear even if app is not open.
Thank you for looking into this

You should use heads-up notifications
For this purposes you should use notification channel with high a importance: How to set importance in the notification channel.
In this answer you can find code sample, how to show notification in the channel with high importance(to show notification even if the app in the foreground):
https://stackoverflow.com/a/67953864/16210149
Hope it would be helpful.

Clear Notification on Android programmatically without remove Chat Bubbles

I got a problem with Android Notification while developing my Messaging App.
My App need to clear notification on Status Bar, so I call Notification#cancel(id)
But this function also close the Chat Bubble relate to this Notification.
I tried hundreds way to clear Notification on Status Bar & keep Bubbles on Screen but can't
Any one here face this problem and has the solution yet?

Instead of cancelling the notification, you can republish it while calling setSuppressNotification(true) on it's bubble metadata & setOnlyAlertOnce(true) on its builder. It will keep the bubble and remove the notification along with the bubble badge and launcher shortcut badges, if any.
Beware that for this to work, your app must be visible on the screen.

change first page of android wear notification

I have a notification on the handheld with a big text style:
notif.setStyle(new NotificationCompat.BigTextStyle()
.bigText(bigLine).setBigContentTitle(titleLine));
This causes the corresponding Wear notification to have this extended text on the first page.
Is there any way to change what is shown on the first page for the wearable only, while leaving the handheld notification unchanged?
In the end, I'd like to split out the bigText value into pages for the wearable.

If you want to split the text from your notifications into few pages - it seems like you have few "items" in one notification and want show them separately on wearable device. If you really have such scenario you should consider using the grouping functionality
This feature is used for example in Gmail app. You basically have one group notification (but with InboxStyle instead of BigTextStyle) on your mobile and multiple notifications on wearable device within one group.
Group notification
You need to set the same groupKey for all these notifications by using method setGroup (String groupKey)
and then use method setGroupSummary (boolean isGroupSummary) with true value to ndicate which one is a summary notification and should be displayed only on mobile. A non-summary notifications will show up only on wearable device.
Two grouping approaches
Using this approach you can submit one notification (group summary notification) on your phone and multiple notifications on the wearable that will be displayed as a one group. So you will end up with something like
MOBILE: 1 group summary notification
WEAR: X notifications within a group
But if you really want to have one notification with X pages instead of X notifications you can work it around in following configuration:
MOBILE: 1 group summary notification
WEAR: 1 notification "within a group" with X pages

How can I create notification that is different on device and wear?

Basically, I am wondering if it is possible to create two different notifications and how - one for Android Device and other for Android Wear?
For example: I want to have just setContentText, but on Android device I want setContentTitle and setContentText
There is currently no possibility to show notification just on Wear (like setLocalOnly with device only - look for more).

I think the Synchronized Notifications sample that comes with the Android Wear SDK may be useful to look at. It gives three simple types of notifications:
(1) A phone-only notification
(2) A watch-only notification
(3) A pair of synchronized phone and watch notifications where the content shown
on the watch notification is different from the one on the phone. They are
synchronized in the sense that dismissing one results in dismissal of the
other one; all based on the Data Layer apis.
I think the third use case is most relevant to you.

Officially it is not possible to create two different notifications for wear and the phone without writing your own Android Wear App extension. It is only possible to define a notification that is only shown on the phone with NotificationCompat.Builder.setLocalOnly(true)
To create a Notification that is only shown on a Wear Device however you can (at the moment) add the Notification to a group with NotificationCompat.Builder.setGroup(randomGroupKey) and omit the display of a group summary notification. If a notification belongs to a group it is not displayed on the phone because the phone will only show the summary notification. If there is no summary you get a notification for your watch only. Just generate a random group key for every watch only notification.
Officially it is only possible to create a notification that looks different on a smartwatch.
For this use a WearableExtender. For example this code snippet:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentTitle(getString(R.string.smaple_notification_title));
builder.setSmallIcon(R.drawable.ic_message);
builder.setContentIntent(PendingIntent.getActivity(this, 0, new Intent(this, ActivateActivity.class), PendingIntent.FLAG_UPDATE_CURRENT));
NotificationCompat.WearableExtender extender = new NotificationCompat.WearableExtender();
extender.setBackground(BitmapFactory.decodeResource(getResources(), R.drawable.notif_background));
extender.setContentIcon(R.drawable.ic_message);
extender.setHintHideIcon(true);
extender.extend(builder);
builder.setPriority(NotificationCompat.PRIORITY_LOW);
builder.setContentText(notificationText);
builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.large_icon));
notificationManager.notify(messageIndex, builder.build());
Sets a special background for the notification, hides the app icon that is normally displayed on the notification, and adds a new icon to the preview of your Notification in the "screen off" mode of the watch.

I don't know if there is a way to do exactly what you want but I try to use stack & summary to bypass this: an contentText only notification has been hidden by a summary notification with contentText and contentTitle. On the Android Wear however summary is not being displayed but all the stacked notification (in your term is the notification with only contentText) can be shown.

Yes, It is possible. Steps -
Intercept your Notifications on Handheld by implementing BroadcastReceiever
Generate Notification for Handheld using NotificationBuilder - use setLocalOnly to duplicating it with Wearable
Send Notification data in Message to Wearable - using MessageApi
Extract receieved data & generate Notification for Wearable

How would I make an app that changes the notification window?

I want to make an app that can control how the notification window looks (i.e. the overlay the shows all your notifications when you swipe down from the top status bar). Is this possible? What APIs would I need to be able to do this (and know what notifications are current, etc)?