I submitted my app at the end of 2017 in the play store and it worked.
Then it was built in Eclipse.
Now I run it in Android Studio and the same code doesn't show any notification.
It is a permanent notification which is present after I call the app's finish() method. (why I do this: see at the bottom if you want to know).
So I looked at all the examples and NONE of the work. No single notification is shown.
So I start an activity and in the activity I show the notification. Then I call finish().
This is my code:
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
intent, 0);
CharSequence connectedPart = getResources().getString(R.string.app_name);
String melding = "";
melding = getResources().getString(R.string.screentimeoutsetto) + " " + newTimeString + ".";
NotificationManager notificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification.Builder(this)
.setContentTitle(connectedPart)
.setTicker(connectedPart)
.setContentText(melding)
.setSmallIcon(R.drawable.ic_stat_name)
.setContentIntent(pendingIntent)
.setOngoing(true)
.build();
notification.flags |= Notification.FLAG_ONGOING_EVENT;
notification.flags |= Notification.FLAG_NO_CLEAR;
notificationManager.notify(2, notification);
dependencies:
dependencies{
implementation "com.android.support:support-compat:26.1.0"
}
Why I do this:
My app does 1 thing: toggle the screentimeout. So when you start it it sets the screentimeout to 30 minutes (starts, sets a notification, then finish()). Start again, it removes the notification and restore the original value for the screen timeout.
Starting with Android Oreo, all notifications require a notification channel, otherwise the notification wont post and an error will appear in your logcat. Here's an example of how you can do it, lifted from one of my apps:
private static void createNotificationChannel(Context ctx) {
if(SDK_INT < O) return;
final NotificationManager mgr = ctx.getSystemService(NotificationManager.class);
if(mgr == null) return;
final String name = ctx.getString(R.string.channel_name);
if(mgr.getNotificationChannel(name) == null) {
final NotificationChannel channel =
new NotificationChannel(CHANNEL_ID, name, IMPORTANCE_DEFAULT);
mgr.createNotificationChannel(channel);
}
}
//Usage...
createNotificationChannel(context);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID);
builder.setSmallIcon(R.drawable.ic_alarm_white_24dp);
//etc...
manager.notify(id, builder.build());
Now from Android 8.0 and onward you need to create notification channel before showing notifications. Here is the Docs link
https://developer.android.com/training/notify-user/channels
Related
I send a simple notification to the user when they open the app. When I swipe the notification away from the status bar, the notification is also deleted.
I just want the notification to stay on the status bar even if I close the app like whats app Instagram and some other apps.
This is how I send notification
Context context = getActivity();
Intent intent1 = new Intent(context,MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent1, 0);
Notification.Builder builder = new Notification.Builder(context)
.setTicker("Notification")
.setContentTitle("Important Message")
.setContentText("This is an example of a push notification using a Navigation Manager")
.setSmallIcon(R.drawable.ic_add)
.setContentIntent(pIntent);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
//These are necessary for the notification to pop up
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.O){
builder.setPriority(Notification.PRIORITY_MAX);
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
builder.setSound(alarmSound);
builder.setLights(Color.BLUE, 500, 500);
}
//after android O we must use notification channels
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
String channelId = "Your_channel_id";
NotificationChannel channel = new NotificationChannel(
channelId,
"Reminder to remind to review your notes",
NotificationManager.IMPORTANCE_HIGH);
channel.setDescription("Hello Dear friends"); //this is to test what this is
notificationManager.createNotificationChannel(channel);
builder.setChannelId(channelId);
}
Notification notification = builder.build();
notification.flags = Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, notification);
}
P.S1: I don't want the notification to persist like in foreground services. I just want to not go away when the app is swiped away, but the user can get rid of the notification anytime they want.
P.S2: I am not using any services, just a simple notification. Like e.g.letting the user know that they collected some badges today.
I am trying to start a foreground service. I get notified that the service does start but the notification always gets suppressed. I double checked that the app is allowed to show notifications in the app info on my device. Here is my code:
private void showNotification() {
Intent notificationIntent = new Intent(this, MainActivity.class);
notificationIntent.setAction(Constants.ACTION.MAIN_ACTION);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
Bitmap icon = BitmapFactory.decodeResource(getResources(),
R.mipmap.ic_launcher);
Notification notification = new NotificationCompat.Builder(getApplicationContext())
.setContentTitle("Revel Is Running")
.setTicker("Revel Is Running")
.setContentText("Click to stop")
.setSmallIcon(R.mipmap.ic_launcher)
//.setLargeIcon(Bitmap.createScaledBitmap(icon, 128, 128, false))
.setContentIntent(pendingIntent)
.setOngoing(true).build();
startForeground(Constants.FOREGROUND_SERVICE,
notification);
Log.e(TAG,"notification shown");
}
Here is the only error I see in relation:
06-20 12:26:43.635 895-930/? E/NotificationService: Suppressing notification from the package by user request.
It's because of Android O bg services restrictions.
So now you need to call startForeground() only for services that were started with startForegroundService() and call it in first 5 seconds after service has been started.
Here is the guide - https://developer.android.com/about/versions/oreo/background#services
Like this:
//Start service:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
startForegroundService(new Intent(this, YourService.class));
} else {
startService(new Intent(this, YourService.class));
}
Then create and show notification (with channel as supposed earlier):
private void createAndShowForegroundNotification(Service yourService, int notificationId) {
final NotificationCompat.Builder builder = getNotificationBuilder(yourService,
"com.example.your_app.notification.CHANNEL_ID_FOREGROUND", // Channel id
NotificationManagerCompat.IMPORTANCE_LOW); //Low importance prevent visual appearance for this notification channel on top
builder.setOngoing(true)
.setSmallIcon(R.drawable.small_icon)
.setContentTitle(yourService.getString(R.string.title))
.setContentText(yourService.getString(R.string.content));
Notification notification = builder.build();
yourService.startForeground(notificationId, notification);
if (notificationId != lastShownNotificationId) {
// Cancel previous notification
final NotificationManager nm = (NotificationManager) yourService.getSystemService(Activity.NOTIFICATION_SERVICE);
nm.cancel(lastShownNotificationId);
}
lastShownNotificationId = notificationId;
}
public static NotificationCompat.Builder getNotificationBuilder(Context context, String channelId, int importance) {
NotificationCompat.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
prepareChannel(context, channelId, importance);
builder = new NotificationCompat.Builder(context, channelId);
} else {
builder = new NotificationCompat.Builder(context);
}
return builder;
}
#TargetApi(26)
private static void prepareChannel(Context context, String id, int importance) {
final String appName = context.getString(R.string.app_name);
String description = context.getString(R.string.notifications_channel_description);
final NotificationManager nm = (NotificationManager) context.getSystemService(Activity.NOTIFICATION_SERVICE);
if(nm != null) {
NotificationChannel nChannel = nm.getNotificationChannel(id);
if (nChannel == null) {
nChannel = new NotificationChannel(id, appName, importance);
nChannel.setDescription(description);
nm.createNotificationChannel(nChannel);
}
}
}
Remember that your foreground notification will have the same state as your other notifications even if you'll use different channel ids, so it might be hidden as a group with others. Use different groups to avoid it.
The problem was i am using Android O and it requires more information. Here is the successful code for android O.
mNotifyManager = (NotificationManager) mActivity.getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) createChannel(mNotifyManager);
mBuilder = new NotificationCompat.Builder(mActivity, "YOUR_TEXT_HERE").setSmallIcon(android.R.drawable.stat_sys_download).setColor
(ContextCompat.getColor(mActivity, R.color.colorNotification)).setContentTitle(YOUR_TITLE_HERE).setContentText(YOUR_DESCRIPTION_HERE);
mNotifyManager.notify(mFile.getId().hashCode(), mBuilder.build());
#TargetApi(26)
private void createChannel(NotificationManager notificationManager) {
String name = "FileDownload";
String description = "Notifications for download status";
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel mChannel = new NotificationChannel(name, name, importance);
mChannel.setDescription(description);
mChannel.enableLights(true);
mChannel.setLightColor(Color.BLUE);
notificationManager.createNotificationChannel(mChannel);
}
For me everything was set correctly (also added FOREGROUND_SERVICE permission to manifest),
but I just needed to uninstall the app and reinstall it.
If none of the above worked you should check if your notification id is 0 ...
SURPRISE!! it cannot be 0.
Many thanks to #Luka Kama for this post
startForeground(0, notification); // Doesn't work...
startForeground(1, notification); // Works!!!
if you are targeting Android 9(Pie) api level 28 and higher than you should give FOREGROUND_SERVICE permission in manifest file.see this link : https://developer.android.com/about/versions/pie/android-9.0-migration#bfa
I can not believe it. In my case, after adding 'android:name=".App"' to AndroidManifest.xml, the notification started showing.
Example:
<application
android:name=".App"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
For Android API level 33+ you need to request POST_NOTIFICATIONS runtime permission. Although this doesn't prevent the foreground service from running, it's still mandatory to notify as we did for < API 33:
Note: Apps don't need to request the POST_NOTIFICATIONS permission in order to launch a foreground service. However, apps must include a notification when they start a foreground service, just as they do on previous versions of Android.
See more in Android Documentation.
In my case, it was caused by me using IntentService.
In short, if you want a foreground service then subclass Service.
My app generates notifications like so :
final Bundle intentExtras = intent.getExtras();
final String title = intentExtras.getString(Constants.EXTRA_TITLE);
final String body = intentExtras.getString(Constants.EXTRA_BODY);
final Integer notifID = intentExtras.getInt(Constants.EXTRA_ID);
// this pending intent will launch after notification is selected
Intent notificationIntent = new Intent(context, NotificationReceiverActivity.class);
notificationIntent.putExtras(intentExtras);// pass the extra data forward to NotificationReceiverActivity
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(context, notifID, notificationIntent, PendingIntent.FLAG_ONE_SHOT);
// build notification to show on the notification bar
try
{
final String packagename = context.getPackageName();
PackageInfo packageinfo = context.getApplicationContext().getPackageManager().getPackageInfo(packagename, 0);
final int iconid = packageinfo.applicationInfo.icon;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
.setAutoCancel(false)
.setContentIntent(pendingIntent)
.setSmallIcon(iconid)
.setContentTitle(title)
.setContentText(body);
// build notification and set alerts
Notification notification = mBuilder.build();
notification.defaults |= Notification.DEFAULT_ALL;
// show notification
NotificationManager notificationMgr = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationMgr.notify(notifID, notification);
}
catch (android.content.pm.PackageManager.NameNotFoundException e)
{}
each notifID is unique ! However, if the app is showing two or more notifications, and the user selects one of them, both notifications for the app are cleared !
I have tried using setAutoCancel(false) or setAutoCancel(true) but it doesn't make a difference.
Additionally, there are no calls to NotificationManager.cancel() or NotificationManager.cancelAll()
How can I prevent the app from clearing all notifications for the app after a user has selected just one of them ?
FURTHER INVESTIGATION...
I've found that the notifications for the app disappear after I launch the app.
However, no .cancel() or .cancelAll() in sight... /confused
Answer: Crosswalk (XWalkView) took the liberty of .cancelAll() notifications !!!
/facepalm x 100000
https://github.com/wuhengzhi/crosswalk/commit/32205e256dbb35ee70c895de4fe7c76d165b30dd
I am using GCM push notification to pass some notification to the user. My problem is when am sending single message then this works fine if send more than one then the last message is shown to all the notification.
Where have I made a mistake?
private static void generateNotification(Context context, String message) {
int icon = R.drawable.ic_launcher;
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent notificationIntent = new Intent(context, GCMMessageView.class);
String[] messageArray = message.split("\\#");
// param :: agentId, Name, Msg
DatabaseHelper db = new DatabaseHelper(context);
int notificationId = db.insertnotifications(messageArray[1], messageArray[0], messageArray[messageArray.length-1]);
notificationIntent.putExtra("message", messageArray[messageArray.length-1]);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(context)
.setContentText(messageArray[messageArray.length-1])
.setContentTitle(context.getString(R.string.app_name))
.setSmallIcon(icon)
.setWhen(when)
.setContentIntent(intent)
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;
// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
notificationManager.notify(notificationId, notification);
}
used this coding in your notification
int requestID = (int) System.currentTimeMillis();
PendingIntent intent = PendingIntent.getActivity(context, requestID,
notificationIntent,0 );
then your notification will not override i hope this will help u
Make notification id unique for each message. Due to this, it's being overridden.
Yes agree with Dipo's answer. According to Android Notification Developer Guide This is being overridden due to same notification id for more than one notification.SO the last message is being received on receiver end. You need to Implement random unique Notification id for each notifications. There are number of ways to implement this . You can use this
int notificationId = new Random().nextInt();
You can also use system time in Mili Seconds for Notification id.Then you need to pass this unique Notification ID to notificationManager.notify()
Cheers ! Keep Coding
Quite late to answer for the thread but felt it will be helpful for someone. The same implementation works fine for FCM firebase implementation as well
// Get a random value
int notificationId = new Random().nextInt();
// Add the notification ID which is unique as a first value of the notify method.
notificationManager.notify(notificationId, notificationBuilder.build());
I am currently developing an app which is using AlarmManager to start an intent to show to the user every x minutes. I would also like a persistent notification in the status bar that shows the time until the next popup. Is there a way to show a persistent notification without a background service. If not does it make sense to stop using the AlarmManager and just use the service to popup the intent every x minutes?
Essentially I need to ensure that an intent will be launched every x minutes even if the phone gets low on mem and that the notification remains in the status bar. I would also like to be able to click on the notification to reset the timer that is counting down. What is the best way to achieve these objectives?
Thanks,
Nathan
To generate Notification try this :
private void generateNotification(Context context, String message) {
int icon = R.drawable.ic_launcher;
long when = System.currentTimeMillis();
String appname = context.getResources().getString(R.string.app_name);
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
int currentapiVersion = android.os.Build.VERSION.SDK_INT;
Notification notification;
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
new Intent(context, myactivity.class), 0);
// To support 2.3 os, we use "Notification" class and 3.0+ os will use
// "NotificationCompat.Builder" class.
if (currentapiVersion < android.os.Build.VERSION_CODES.HONEYCOMB) {
notification = new Notification(icon, message, 0);
notification.setLatestEventInfo(context, appname, message,
contentIntent);
notification.flags = Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, notification);
} else {
NotificationCompat.Builder builder = new NotificationCompat.Builder(
context);
notification = builder.setContentIntent(contentIntent)
.setSmallIcon(icon).setTicker(appname).setWhen(0)
.setAutoCancel(true).setContentTitle(appname)
.setContentText(message).build();
notificationManager.notify(0 , notification);
}
}
Hope this helps.