Develop Reference

New notifications not showing after one has been swiped away

My android app tracks the user's location and compares it to the locations in a list, and if it finds a match, it creates a heads-up notification that remains visible at the top of the screen (the green band in this image).
Then if the user taps the notification, it starts another activity (DisplayActivity) using a pendingIntent. This process may be repeated many times in a journey, with a new notification for each one.
Here is my code:
void makeNotification() {
if (SDK_INT >= Build.VERSION_CODES.O) {
int soundName;
String NOTIFICATION_CHANNEL_ID = "AMJnotifychannel";
Intent goShow = new Intent(this, DisplayActivity.class);
goShow.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
goShow.putExtra("placeno", placeNumber);
goShow.putExtra("plname", placeName);
goShow.putExtra("justquiz", quizOnly);
goShow.putExtra("addedscore", scoreAdded);
goShow.putExtra("killlquiz", false);
PendingIntent pendingIntent = PendingIntent.getActivity(this, notificationNumber, goShow, PendingIntent.FLAG_MUTABLE | PendingIntent.FLAG_UPDATE_CURRENT);
RemoteViews expandedView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.expandednotify);
expandedView.setTextViewText(R.id.placename, placeName);
NotificationManager notificationManager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
soundName = R.raw.alert;
Uri sound = Uri.parse("android.resource://" + getPackageName() + "/" + soundName);
AudioAttributes audioAttributes = new AudioAttributes.Builder()
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.setUsage(AudioAttributes.USAGE_NOTIFICATION)
.build();
NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "amjchannel", NotificationManager.IMPORTANCE_HIGH);
channel.setSound(sound, audioAttributes);
channel.shouldVibrate();
channel.enableLights(true);
channel.enableVibration(true);
channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PUBLIC);
notificationManager.createNotificationChannel(channel);
builder.setSound(sound);
builder.setSmallIcon(R.mipmap.amjnotify);
builder.setContentIntent(pendingIntent);
builder.setCustomContentView(expandedView);
builder.setCustomBigContentView(expandedView);
builder.setAutoCancel(true);
builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);
builder.setPriority(NotificationCompat.PRIORITY_HIGH);
builder.setFullScreenIntent(pendingIntent, true);
builder.setOngoing(true);
builder.setChannelId(NOTIFICATION_CHANNEL_ID);
notificationManager.notify(717, builder.build());
}
}
As long as the user does tap the notification each time and starts DisplayActivity, this works fine - new notifications continue to appear as a heads-up notifications at the top of the screen and the user doesn't have to open the notification drawer to see them.
However, if at any time the user dismisses a notification by swiping it upwards and off the screen, the next time a notification occurs it behaves differently. Swiping a notification away into the drawer just once means that, after that, all future notifications no longer appear at the top of the screen automatically - they go straight into the drawer and the user then has to open the drawer to see them.
I have tried this on a number of Android builds using emulators - API28, API29, API30 and API33 - always with the same result.
These notifications are essential to my app, which is useless without them. Can anyone tell me how to make sure that new notifications appear on the screen every time, as in the picture, even after the user has swiped one away into the notification drawer.
And just to make the puzzle more complicated..........
I have just tried deleting the old notification using:
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(717);
before creating a new one. As before, everything is ok if the user taps the notification and opens the new activity each time. However, if he swips the notification away one time, then whenever there is another notification after that it goes straight to the displayActivity without waiting for the user to tap the intent.
I'm totally confused!

How to send the notification bar back up programatically?

I researched and the only answers I could find either told:
How to disable the notification bar from being pulled down.
How to cancel a notification using:
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(0);
Both of these aren't what I require as the notification gets cancelled fine. I've set two actions in my notification: 'Dismiss' and 'Open Activity'. As the name implies, upon clicking both, the above code executes and clears the notification but doesn't cause the notification bar from going back up. This is needed, specially when the second Notification Action causes an Activity launch.
I tried on Android Lollipop and Nougat and the notification bar didn't go back up in either. So if someone could kindly tell me if it is even possible and how.
Thanks.
The code for building the notification:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder
.setSmallIcon(icon).setTicker(message).setWhen(when)
.setAutoCancel(true).setContentTitle("Kindly record your Voice")
.setColor(Color.RED);
notificationIntent = new Intent(this,ReminderReceiver.class);
notificationIntent.setAction("Record");
PendingIntent pendIntent1 = PendingIntent.getBroadcast(getApplicationContext(), 1, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
builder.addAction(R.drawable.common_google_signin_btn_icon_dark, "Record", pendIntent1);
notificationIntent2 = new Intent(this, ReminderReceiver.class);
notificationIntent2.setAction("Dismissed");
PendingIntent pendIntent2 = PendingIntent.getBroadcast(getApplicationContext(), 1, notificationIntent2, PendingIntent.FLAG_UPDATE_CURRENT);
builder.addAction(R.drawable.starticon, "Dismiss", pendIntent2);
notificationIntent3 = new Intent(this, CancelReceiver.class);
PendingIntent pendIntent3 = PendingIntent.getBroadcast(getApplicationContext(), 1, notificationIntent3, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setDeleteIntent(pendIntent3);
notification = builder.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(1, notification);

Might seem weird, but the notification bar doesn't go up when there are other notifications present. If yours is the only notification, the bar slides up automatically upon clicking.

android - notifications without alerting the user

I currently have an ongoing notification that displays some information about my app. While this information is useful, there's no need for the user to actually see that I've created the notification. Its basically there to tell them that "hey, my app is doing stuff in the background, click here to go back to it".
My notification works correctly, however whenever I call ".notify()" my notification shows the text from my notification in the notification bar at the top of the screen, like a text message does.
I want to to do it silently, so when I call notify it doesn't show my notifications text in the small notification bar before doing the "roll up" animation.
Context context = getApplicationContext();
Intent notificationIntent = new Intent(this, AudioPlayer.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
Notification notification = new Notification(R.drawable.ic_launcher,
title, System.currentTimeMillis());
RemoteViews contentView = new RemoteViews(getPackageName(),
R.layout.note_layout);
~~~ remote views stuff ~~~
contentView.setTextViewText(R.id.notification_title, title);
contentView.setTextViewText(R.id.notification_text, author);
notification.contentView = contentView;
notification.contentIntent = contentIntent;
notification.flags |= Notification.FLAG_ONGOING_EVENT;
mNotificationManager.notify(8675309, notification);

I'm not sure that the OS allow that.
What you want to hide is called Ticker.
You can try to set an empty Ticker Text:
Notification notification = new Notification(R.drawable.ic_launcher,
"", System.currentTimeMillis());

Custom notification with remote view on Android

I have edited the code by using setOnClick pending intent, and this code works for ImageView and notifications text seperate as I want, but I still need some help.
I want to pause or play mediaplayer from my service class, so how could I access the stop or play method of service from Notification pending intent?
Some says broadcast receivers will help you, but I don't get exactly how it's going to work.
I have managed to open a web browser from the pause button from notification, but I don't know how to access service methods. Share any sample code if you have some.
#SuppressWarnings("deprecation")
void showNotification() {
int pendingRequestCode = 0;
int pendingFlag = 0;
final Resources res = getResources();
final NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
Intent intent = new Intent(this,MainActivity.class);
PendingIntent pi= PendingIntent.getActivity(this, 0, intent, 0);
Notification.Builder builder = new Notification.Builder(this)
.setSmallIcon(R.drawable.ic_action_search)
.setAutoCancel(true)
.setTicker("this is notification")
.setContentIntent(pi);
// Sets a custom content view for the notification, including an image button.
RemoteViews layout = new RemoteViews(getPackageName(), R.layout.notification);
layout.setTextViewText(R.id.notification_title, getString(R.string.app_name));
Intent clickIntent = new Intent(Intent.ACTION_VIEW, Uri_myBlog);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),pendingRequestCode, clickIntent, pendingFlag);
layout.setOnClickPendingIntent(R.id.notification_button,pendingIntent);
builder.setContent(layout);
// Notifications in Android 3.0 now have a standard mechanism for displaying large
// bitmaps such as contact avatars. Here, we load an example image and resize it to the
// appropriate size for large bitmaps in notifications.
Bitmap largeIconTemp = BitmapFactory.decodeResource(res,
R.drawable.pause);
Bitmap largeIcon = Bitmap.createScaledBitmap(
largeIconTemp,
res.getDimensionPixelSize(android.R.dimen.notification_large_icon_width),
res.getDimensionPixelSize(android.R.dimen.notification_large_icon_height),
false);
largeIconTemp.recycle();
builder.setLargeIcon(largeIcon);
notificationManager.notify(NOTIFICATION_DEFAULT, builder.getNotification());
}
PendingIntent getDialogPendingIntent(String dialogText) {
return PendingIntent.getActivity(
this,
dialogText.hashCode(), // Otherwise previous PendingIntents with the same
// requestCode may be overwritten.
new Intent(ACTION_DIALOG)
.putExtra(Intent.EXTRA_TEXT, dialogText)
.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK),
0);
}

You did not tell what version of Android you target, but in general it is not possible until Android 3.x (Honeycomb). So if you want that to happen on 2.x, then sorry - you are out of luck.
For Honeycomb, you simply have to provide a custom layout and assign PendingIntent to each button you need, by calling setOnClickPendingIntent(). If you got the SDK's samples downloaded, then see MainActivity of the HoneycombGallery app (shall be in your <SDK>\samples\android-XX\HoneycombGallery\ folder. XX is anything from 14 (or higher).

Check Bound Services using Messenger
http://developer.android.com/guide/components/bound-services.html
Also you can check this question
Binding to a local Service from a BroadcastReceiver

More than one status bar notification

Can I create more than one notification in status bar from one program(Service) or I should create new Activity with a clickable list(for example LinearLayout) of objects?

You certainly can create more than one notification from a service or application, but you have to ask yourself is, as a user, you would want an application to spam notifications to you. I've been using one notification in my remote service and reusing the same notification by just updating its content. Here is an example:
public void onPlaybackStarted(int currentTrack, Show show) {
notificationManager.cancel(R.layout.notification_playing);
notification.tickerText = show.getTracks().get(currentTrack).getName();
if (notificationView == null) {
notificationView = new RemoteViews(getPackageName(), R.layout.notification_playing);
}
notificationView.setTextViewText(R.id.notification_playing_track, show.getTracks().get(currentTrack).getName());
notificationView.setTextViewText(R.id.notification_playing_band, show.getArtist());
notificationView.setTextViewText(R.id.notification_playing_date, show.getDate());
Intent intent = new Intent(TrackPlayerService.this, ListTracksActivity.class)
.putExtra("track", currentTrack)
.putExtra("artist", show.getArtist())
.putExtra("date", show.getDate())
.putExtra("location", show.getLocation())
.putExtra("venue", show.getVenue())
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
notification.contentView = notificationView;
notification.contentIntent = PendingIntent.getActivity(TrackPlayerService.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
notification.flags |= Notification.FLAG_ONGOING_EVENT;
notificationManager.notify(R.layout.notification_playing, notification);
}
If your notifications are not revolving, meaning you need to notify the user about 3 or 4 different things simultaneously, then having a notification that opens a ListActivity would be the best way to go.