What is the difference between those two?
I want to use the startForeground method and cannot use it with NotificationManager..
Thanks
A Notification is a class that represents either a persistent icon that goes in the status bar and is accessible through the launcher, turning on or flashing LEDs on the device, or alerting the user by flashing the backlight, playing a sound, or vibrating.
The Notification Manager is the class that allows you to add notifications to the system,
startForeground is a method of the Serivce class. For example inside your Service class you can have something like this.
Intent notificationIntent = new Intent(this, ActivityMain.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_stat_play)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher))
.setTicker(getString(R.string.app_name))
.setWhen(System.currentTimeMillis())
.setOngoing(true)
.setContentTitle(getString(R.string.app_name))
.setContentText(someText);
Notification notification = builder.build();
startForeground(1, notification);
A Notification is a description of what you want to occur to alert the user about something -- what icon goes in the status bar, what ringtone to play, etc.
NotificationManager is a system service that can show a Notification.
I want to use the startForeground methode and cannot use it with NotificationManager
Correct. Create a Notification using Notification.Builder (or NotificationCompat.Builder). See this project for an example of using startForeground().
Related
Unfortunately another question about my startForegroundService notification... I searched, really, I did:
I have a foreground service that is running perfectly. I would like to add a couple of actions to this notification. For one, make it so when the user clicks the notification they are sent to MainActivity as well as adding a "Quit" addAction.
Here is the snippet I am using to create the notification:
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent,0);
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
String channelId = getNotificationChannel(notificationManager);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId);
Notification notification = notificationBuilder.setOngoing(true)
.setCategory(NotificationCompat.CATEGORY_SERVICE)
.setSmallIcon(R.drawable.ic_notif_icon)
.setContentTitle("My app")
.setContentText("Background service is running...")
.setContentIntent(pendingIntent)
.build();
startForeground(13365, notification);
Using the above a notification shows up just fine, but click on it results in nothing. I also tried using addAction, also nothing. I am aware the syntax is a little bit different (....Action.Builder) when adding an addAction.
I am creating my notification in the onCreate handler of the foreground service. Running on SDK 26.
Can startForeground notifications have setContentIntent / addAction attached to them?
Thanks!
Solved : I had the notification replaced elsewhere in my application and was not adding the intents there.
Doh!
I'm making an android application, and I want to receive notifications when the application is closed, how can I do that? I've read also other posts where people ask it but i can't understand how to make it work, could you please try to explain this better?
I've also tried to make a countdownTimer and make the application do something when the timer reaches the 0 but it didn't work, 'cause obviusly when I close the application, I close the timer too.
use this code to make in app notification
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher) // notification icon
.setContentTitle("Notification!") // title for notification
.setContentText("Hello word") // message for notification
.setAutoCancel(true); // clear notification after click
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this,0,intent,Intent.FLAG_ACTIVITY_NEW_TASK);
mBuilder.setContentIntent(pi);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
In my application i received push notification from gcm, if i click on that push notification, my application will open and i need to remove my notification from notification bar. But , it is still on notification bar.
I used the following logic for generating push notification in my GCMIntentService class.
mNotificationManager = (NotificationManager)
this.getSystemService(Context.NOTIFICATION_SERVICE);
//PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, TipsActivity.class), 0);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, TipsActivity.class),
Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.icon)
.setContentTitle("Appname")
.setStyle(new NotificationCompat.BigTextStyle()
.bigText(msg))
.setContentText(msg);
mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
So, please guide me how to remove my notification , when i click on it.
Hi You have to add the following line>..
mBuilder.setAutoCancel(true);
Try this and let me know the feedback.
as per my guessing it is happening due to flag of notification
may be there is line in your code related to notification flag
may be that flag is FLAG_NO_CLEAR so change that flag to FLAG_AUTO_CANCEL
you will find this flag in generateNotification logic if you not mentioned the flag then please specify it as FLAG_AUTO_CANCEL
FLAG_NO_CLEAR means
Bit to be bitwise-ored into the flags field that should be set if the notification should not be canceled when the user clicks the Clear all button
and
FLAG_AUTO_CANCEL means
Bit to be bitwise-ored into the flags field that should be set if the notification should be canceled when it is clicked by the user.
here is the sample line
notification.flags |= Notification.FLAG_AUTO_CANCEL;
where notification is object of NotificationManager
use this link for refference
hope it will resolve your issue happy coding
I've been working on push notifications and I am able to implement it and display it on status bar, the problem I am facing is that I want to display it even if the phone is lock, Under the lock screen where it says ("drag to unlock"), I have seen notifications like that but cant find any example to that.
Example:
Just like when you received a missed call , it will show it under the lock button on your screen.
Code:
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
int icon = R.drawable.icon_launcher;
CharSequence tickerText = "MyApplication";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
notification.defaults |= Notification.DEFAULT_SOUND|Notification.DEFAULT_VIBRATE|Notification.DEFAULT_LIGHTS;;
CharSequence contentTitle = this.title;
CharSequence contentText = this.message;
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(NOTICE_ID, notification);
Create Notification using NotificationCompat.Builder
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher) // notification icon
.setContentTitle("Notification!") // title for notification
.setContentText("Hello word") // message for notification
.setAutoCancel(true); // clear notification after click
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this,0,intent,Intent.FLAG_ACTIVITY_NEW_TASK);
mBuilder.setContentIntent(pi);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
Push Notification on locked Screen
http://www.hongkiat.com/blog/android-lock-screen-notifications/
Create Notification using NotificationCompat.Builder but make sure to put visibility to public like
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder
.setContentTitle("Title")
.setContentText("content")
.setSmallIcon(R.mipmap.ic_launcher)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);//to show content in lock screen
Have you tried creating the alertdialog with a flag? The flag_show_when_locked should do the trick.
Please refer to this thread, you should find a more detailed answer here.
Android Lock Screen Widget
I fixed this by adding this line to notification builder
builder.setOngoing(true);
It will also make notification not cancelable by user, but it solves the problem.
Credits to: Marian Klühspies (link)
The notifications you have seen may actually be widgets placed on a custom widget host lockscreen.
If you look at the android platform source code for InstallWidgetReceiver as late as 4.4.3 here:
https://android.googlesource.com/platform/packages/apps/Launcher3/+/master/src/com/android/launcher3/InstallWidgetReceiver.java
You will see this note by the author:
/**
* We will likely flesh this out later, to handle allow external apps to place widgets, but for now,
* we just want to expose the action around for checking elsewhere.
*/
And you can see that InstallWidgetReceiver.java is in fact not fleshed out by google in the same way as InstallShortCutReceiver.java is. So it seems at least up to 4.4.3 you cant add widgets to the native lock screen in the same way that you can for example add a shortcut to the homescreen using InstallShortCutReceiver.
Unless you build your own lockscreen app as a widget host and the user installs in lieu of the native you may be out of luck using a widget.
Another approach however is to just us an activity that sets getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
This will display your activity whether the screen is locked or not. Dismissing this activity when the screen is locked will display the locked screen.
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()