I used to show a number in app icon using this library as follows:
ShortcutBadger.applyCount(context, numberToShow);
OneSignal also has same function in its Android SDK.
Now in Oreo, with the introduction of notification channels, things get complex to me. I can create a channel. Then, I can also create a notification as follows:
public static void createNotification(Context context, int numberToShow) {
Notification notification = new NotificationCompat.Builder(context, context.getString(R.string.notification_channel_id))
.setContentTitle("Dummy Title")
.setContentText("Dummy content")
.setSmallIcon(R.drawable.app_icon)
.setNumber(numberToShow)
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(0, notification);
}
However, I have to show a notification with this solution, which I don't need and thus don't want. Is there any way in Oreo that I can achieve the same thing I have done previously, i.e. just showing 'notification dot' or a number attached to the app icon?
Sorry, but there is no SDK-level support for showing numbers or other badges on launcher icons, other than the Notification scenario that you described.
set the importance of the notification channel to
IMPORTANCE_MIN
like int importance = NotificationManager.IMPORTANCE_MIN;
and then create the channel as -
NotificationChannel nChannel = new NotificationChannel
(channelId, title, importance);
This will the set the badge count(shown on the long press of the icon) without notifying the user about any notification in the system tray. Though the notification will be in the tray, but will not pop up and quietly reside there.
Related
a while back I updated my App to add support for Android 8+, after updating the notifications to use the required NotificationChannel I noticed that I lost a feature.
The App uses a chronometer notification, back then I was able to update the Notification priority, to display a notification using PRIORITY_HIGH, so the notification was "pushed" to the user, and then edit the notification priority to PRIORITY_LOW, to hide the notification.
After reading the docs, from what I could understand, I can't control the priority after creating the NotificationChannel, leaving this control to the user, however, asking for the user to edit the notification settings is not optimal for my usage.
Relevant code:
//Creating the notification channel (while setting up the app)
NotificationChannel channel = new NotificationChannel(channelId, channelTitle, NotificationManager.IMPORTANCE_HIGH);
//Editing the NotificationChannel to lower the Notification priority (not working)
NotificationChannel channel = notificationManager.getNotificationChannel(channelId);
channel.setImportance(NotificationManager.IMPORTANCE_LOW);
notificationManager.createNotificationChannel(channel);
Is there a way accomplish this behavior, while still using the NotificationChannels?
Turns out I was overthinking this (by a lot), simply adding the option
setOnlyAlertOnce on the NotificationBuilder, while still using the NotificationManager.IMPORTANCE_HIGH to setup the channel, will result on the expected behavior, like so:
NotificationCompat.Builder notificationBuilder =
new NotificationCompat.Builder(context, channelId).setOnlyAlertOnce(true);
We are migrating to Notification Channel system in Android O, we noticed that once Channel is created, it's properties cannot be changed.
We have the following scenario,
- Notification channel is created with,
NotificationChannel channel = new NotificationChannel(channelId, name, NotificationManager.IMPORTANCE_HIGH);
/**
* Higher notification importance: shows everywhere, makes noise and peeks. May use full screen
* intents.
*/
we have messaging style with history of messages
User receives a message in the notification bar - Notification sound plays.
User replies to message, we've implemented BroadcastReceiver to receive replied message and update the notification again with the latest message, But due to the channel importance being High, notification sound played again which should not play for better user experience.
We tried using addHistoricMessage() for the replied message, which shows the same behavior
Is there any way to prevent Android from playing sound for notification for the replied messages.
code:
Channel creation:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = title;
NotificationChannel channel = new NotificationChannel(MESSAGE_CHANNEL, name, NotificationManager.IMPORTANCE_HIGH);
android.app.NotificationManager notificationManager = context.getSystemService(android.app.NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
Notification builder:
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, MESSAGE_CHANNEL);
NotificationCompat.MessagingStyle style = new NotificationCompat.MessagingStyle(displayName)
.setConversationTitle(conversation.isGroup() ? conversation.getTitle(context) : null);
style.addMessage(message, timestamp, sender);
.
.
.
.
builder.setStyle(style);
builder.setShowWhen(true);
builder.setGroup(MESSAGING_GROUP_LABEL);
builder.setColor(ContextCompat.getColor(context, conversation.getColorSet().getPrimaryColorId()));
setVisibility(builder);
builder.setAutoCancel(true);
setPriority(builder, NotificationCompat.PRIORITY_MAX);
setCategory(builder, Notification.CATEGORY_MESSAGE);
setSmallIcon(builder, R.drawable.ic_stat_ic_notif);
NotificationManagerCompat.from(context).notify(conversation.getConversationId(), notificationId, builder.build());
messageRepliedReceiver:
same notification builder is used with previous notificationId
If existing notification is amended with extra message then you can use on the same builder:
notificationBuilder.setOnlyAlertOnce(true);
This works even for Notifications in Android O Notification Channels. It will prevent vibration, sound, but it will still peek if Channel setting was Urgent (IMPORTANCE_HIGH).
This possible solution was found in this post that has other great ideas about handling "history of messages" notification: Android: How to use MessagingStyle for notifications without caching messages
I start a foreground service that shows up in the status bar under android systems battery information.
Is there a way to customize the information (title, subtext, icon, ...) presented?
service code: CODE EDITED
#Override
public void onCreate() {
context = this.getApplicationContext();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
Intent notificationIntent = new Intent(context, CallbackTestWidgetService.class);
PendingIntent pendingIntent =
PendingIntent.getActivity(context, 10, notificationIntent, 0);
Notification notification = new Notification.Builder(context, "Test")
.setContentTitle("Test")
.setContentText("text")
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.test)
.setTicker("test")
.build();
CharSequence name = "test";
String description = "test";
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel("10", name, importance);
channel.setDescription("test");
// Register the channel with the system; you can't change the importance
// or other notification behaviors after this
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
startForeground(10, notification);
}
}
What you're seeing is the default notification when no notification is posted by the app.
The reason why no notification is being posted (despite you calling startForeground) is that you are targeting API 26 or higher and not associating your notification with a notification channel. This causes your notification to be dropped entirely as per the note on that page:
Caution: If you target Android 8.0 (API level 26) and post a notification without specifying a notification channel, the notification does not appear and the system logs an error.
You must create a notification channel, then include the id of the notification channel when building your notification.
You're building a Notification to pass to startForeground. Use the createContentView function, just like you would for a normal notification you wanted to customize.
Note that this will only work on newer versions of Android, you probably want to use the NotiicationCompat class from the support library to support version specific api differences and test on a few different APIs of emulators.
I am building an android app that replaces the notification drawer and show notifications in its own window. I managed to show notifications on my drawer when they are posted by overriding onNotificationPosted() method. But, same notification is also shown by android. So,I want that notifications should be shown ONLY on my window, there are other apps who have done it,so it's not impossible. Please tell me how to override default behavior of android. Thanks in advance. :)
EDIT
What i want is to disable heads-up notification. Any solutions there?
In Oreo and above OS It is in the Notification channel Where you have to set the Priority any thing lesser than NotificationManager.IMPORTANCE_HIGH or some thing like this below stops the heads up banner.
NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
CHANNEL_NAME,
NotificationManager.IMPORTANCE_DEFAULT)
On Pre-Oreo devices, the notification priority itself helps the system to show/hide the heads up banner.
Also remember when you make this change you have to delete the app and reinstall to see the change!
I used NotificationManager.IMPORTANCE_DEFAULT with setPriority(NotificationCompat.PRIORITY_DEFAULT) and it seems to work (Oneplus 3 and Note 8).
String channelId = "ch01";
String channelName = "Status";
int importance = NotificationManager.IMPORTANCE_DEFAULT;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
}
NotificationCompat.Builder nb = new NotificationCompat.Builder(this, channelId);
nb.setSmallIcon(R.drawable.ic_logo);
nb.setContentTitle(notificationText);
nb.setContentText("");
nb.setContentIntent(mainActivityPendingIntent);
nb.setPriority(NotificationCompat.PRIORITY_DEFAULT);
nb.setOnlyAlertOnce(true);
nb.setOngoing(true);
nb.setWhen(System.currentTimeMillis());
Huh! Looks like Android provides no way to disable heads-up notification of other apps via code.
Here is a little hack!
So, what we need is, not show any heads-up notification from any other app. To solve this, we need to understand that at one time there could be only one heads-up notification on screen.
Hack is, send your own notification right after you listen any notification being posted i.e. in onNotificationPosted() of a NotificationListener subclass.
this.mNotificationManager.notify(12321, new Notification.Builder(this)
.setContentTitle("").setContentText("")
.setSmallIcon(R.drawable.transparent)
.setPriority(Notification.PRIORITY_DEFAULT)
.setFullScreenIntent(this.mBlankIntent, true)
.setAutoCancel(true)
.build());
It will replace the notification of the 3rd app with your almost blank notification. Oh wow! Wait!! This looks ugly.
Ofcourse, Now we need to remove this notification before the user could even see this.
Now that you know package name of the android. You can show cancel your notification some thing like this.
if(packageName.equals("com.my.package")){
mNotificationManager.cancel(12321);
return;
}
So, what we are doing is showing our notification, when any other heads up notification shows up, and then remove our own notification. All this happens so quick that user does not sees any heads-up notification, and for doing this, I did not needed to store the notification in memory even.
Set the IMPORTANCE to LOW and PRIORITY to LOW.
It work for me
var notificationChannel = NotificationChannel(channelId, "Call" , NotificationManager.IMPORTANCE_LOW)
var notification = NotificationCompat.Builder(context,channelId)
.setContentTitle("Calling")
.setContentText("Call")
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.setPriority(NotificationCompat.PRIORITY_LOW)
I need a program that will add a notification on Android. And when someone clicks on the notification, it should lead them to my second activity.
I have established code. The notification should be working, but for some reason it is not working. The Notification isn't showing at all. I don't know what am I missing.
Code of those files:
Notification n = new Notification.Builder(this)
.setContentTitle("New mail from " + "test#gmail.com")
.setContentText("Subject")
.setContentIntent(pIntent).setAutoCancel(true)
.setStyle(new Notification.BigTextStyle().bigText(longText))
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// Hide the notification after it's selected
notificationManager.notify(0, n);
The code won't work without an icon. So, add the setSmallIcon call to the builder chain like this for it to work:
.setSmallIcon(R.drawable.icon)
Android Oreo (8.0) and above
Android 8 introduced a new requirement of setting the channelId property by using a NotificationChannel.
NotificationManager mNotificationManager;
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(mContext.getApplicationContext(), "notify_001");
Intent ii = new Intent(mContext.getApplicationContext(), RootActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, ii, 0);
NotificationCompat.BigTextStyle bigText = new NotificationCompat.BigTextStyle();
bigText.bigText(verseurl);
bigText.setBigContentTitle("Today's Bible Verse");
bigText.setSummaryText("Text in detail");
mBuilder.setContentIntent(pendingIntent);
mBuilder.setSmallIcon(R.mipmap.ic_launcher_round);
mBuilder.setContentTitle("Your Title");
mBuilder.setContentText("Your text");
mBuilder.setPriority(Notification.PRIORITY_MAX);
mBuilder.setStyle(bigText);
mNotificationManager =
(NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
// === Removed some obsoletes
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
String channelId = "Your_channel_id";
NotificationChannel channel = new NotificationChannel(
channelId,
"Channel human readable title",
NotificationManager.IMPORTANCE_HIGH);
mNotificationManager.createNotificationChannel(channel);
mBuilder.setChannelId(channelId);
}
mNotificationManager.notify(0, mBuilder.build());
Actually the answer by ƒernando Valle doesn't seem to be correct. Then again, your question is overly vague because you fail to mention what is wrong or isn't working.
Looking at your code I am assuming the Notification simply isn't showing.
Your notification is not showing, because you didn't provide an icon. Even though the SDK documentation doesn't mention it being required, it is in fact very much so and your Notification will not show without one.
addAction is only available since 4.1. Prior to that you would use the PendingIntent to launch an Activity. You seem to specify a PendingIntent, so your problem lies elsewhere. Logically, one must conclude it's the missing icon.
You were missing the small icon.
I did the same mistake and the above step resolved it.
As per the official documentation:
A Notification object must contain the following:
A small icon, set by setSmallIcon()
A title, set by setContentTitle()
Detail text, set by setContentText()
On Android 8.0 (API level 26) and higher, a valid notification channel ID, set by setChannelId() or provided in the NotificationCompat.Builder constructor when creating a channel.
See http://developer.android.com/guide/topics/ui/notifiers/notifications.html
This tripped me up today, but I realized it was because on Android 9.0 (Pie), Do Not Disturb by default also hides all notifications, rather than just silencing them like in Android 8.1 (Oreo) and before. This doesn't apply to notifications.
I like having DND on for my development device, so going into the DND settings and changing the setting to simply silence the notifications (but not hide them) fixed it for me.
Creation of notification channels are compulsory for Android versions after Android 8.1 (Oreo) for making notifications visible. If notifications are not visible in your app for Oreo+ Androids, you need to call the following function when your app starts -
private void createNotificationChannel() {
// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = getString(R.string.channel_name);
String description = getString(R.string.channel_description);
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name,
importance);
channel.setDescription(description);
// Register the channel with the system; you can't change the importance
// or other notification behaviours after this
NotificationManager notificationManager =
getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
}
You also need to change the build.gradle file, and add the used Android SDK version into it:
implementation 'com.android.support:appcompat-v7:28.0.0'
This worked like a charm in my case.
I think that you forget the
addAction(int icon, CharSequence title, PendingIntent intent)
Look here: Add Action
I had the same issue with my Android app. I was trying out notifications and found that notifications were showing on my Android emulator which ran a Android 7.0 (Nougat) system, whereas it wasn't running on my phone which had Android 8.1 (Oreo).
After reading the documentation, I found that Android had a feature called notification channel, without which notifications won't show up on Oreo devices. Below is the link to official Android documentation on notification channels.
Notifications Overview, Notification anatomy
Create and Manage Notification Channels
For me it was an issue with deviceToken. Please check if the receiver and sender device token is properly updated in your database or wherever you are accessing it to send notifications.
For instance, use the following to update the device token on app launch. Therefore it will be always updated properly.
// Device token for push notifications
FirebaseInstanceId.getInstance().getInstanceId().addOnSuccessListener(
new OnSuccessListener<InstanceIdResult>() {
#Override
public void onSuccess(InstanceIdResult instanceIdResult) {
deviceToken = instanceIdResult.getToken();
// Insert device token into Firebase database
fbDbRefRoot.child("user_detail_profile").child(currentUserId).child("device_token")).setValue(deviceToken)
.addOnSuccessListener(
new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
}
});
}
});
I encountered a similar problem to yours and while searching for a solution I found these answers but they weren't as direct as I hoped they would be but it gives an Idea; Your notifications may not be showing because for versions >=8 notifications are done relatively differently there is a NotificationChannel which aids in managing notifications this helped me. Happy coding.
void Note(){
//Creating a notification channel
NotificationChannel channel=new NotificationChannel("channel1",
"hello",
NotificationManager.IMPORTANCE_HIGH);
NotificationManager manager=(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
manager.createNotificationChannel(channel);
//Creating the notification object
NotificationCompat.Builder notification=new NotificationCompat.Builder(this,"channel1");
//notification.setAutoCancel(true);
notification.setContentTitle("Hi this is a notification");
notification.setContentText("Hello you");
notification.setSmallIcon(R.drawable.ic_launcher_foreground);
//make the notification manager to issue a notification on the notification's channel
manager.notify(121,notification.build());
}
Make sure your notificationId is unique. I couldn't figure out why my test pushes weren't showing up, but it's because the notification ids were generated based on the push content, and since I was pushing the same notification over and over again, the notification id remained the same.
Notifications may not be shown if you show the notifications rapidly one after the other or cancel an existing one, then right away show it again (e.g. to trigger a heads-up-notification to notify the user about a change in an ongoing notification). In these cases the system may decide to just block the notification when it feels they might become too overwhelming/spammy for the user.
Please note, that at least on stock Android (tested with 10) from the outside this behavior looks a bit random: it just sometimes happens and sometimes it doesn't. My guess is, there is a very short time threshold during which you are not allowed to send too many notifications. Calling NotificationManager.cancel() and then NotificationManager.notify() might then sometimes cause this behavior.
If you have the option, when updating a notification don't cancel it before, but just call NotificationManager.notify() with the updated notification. This doesn't seem to trigger the aforementioned blocking by the system.
If you are on version >= Android 8.1 (Oreo) while using a Notification channel, set its importance to high:
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
val pendingIntent = PendingIntent.getActivity(applicationContext, 0, Intent(), 0)
var notification = NotificationCompat.Builder(applicationContext, CHANNEL_ID)
.setContentTitle("Title")
.setContentText("Text")
.setSmallIcon(R.drawable.icon)
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setContentIntent(pendingIntent)
.build()
val mNotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
mNotificationManager.notify(sameId, notification)