Develop Reference

Android: continuously update text in the notification area

As Richard said in this question > Possible to continuously update text in the notification area? , I have the same issue here .
I want to update text in the notification area .
This question is answered and accepted , but the answer doesn't help me .
It's about to create text as bitmap dynamically and set it to Small Icon of notification .
But as Richard commented , the images for setSmallIcon must be predefined in the package.There is no ability to edit them on the fly.
Please kindly show me the right way to do this stuff .

It's quite simple to update your Notification.
First of all when you create it you must create it with an id.
NotificationManager mNotificationManager =(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Sets an ID for the notification, so it can be updated
int notifyID = 1;
mNotifyBuilder = new NotificationCompat.Builder(this)
.setContentTitle("Title")
.setContentText("Text")
.setSmallIcon(R.drawable.ic_notify);
mNotificationManager.notify(
notifyID,
mNotifyBuilder.build());
Now to update your Notification you only need to notify the new notification with the old id and this will be updated (you don't need to reset the paraneter you don't want to update).
mNotifyBuilder.setContentText(setContentText("New Text")
mNotifyBuilder.setSmallIcon(R.drawable.ic_new_notify);
//this update your notification
mNotificationManager.notify(
notifyID,
mNotifyBuilder.build());

I tried to make one but it has one disadvantage is that, it has one empty notification in notification drawer,
public static int when = 0;
private void generateNotification(Context context) {
Log.i(TAG, "generateNotification");
Intent notificationIntent = new Intent(context, MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(
this.getApplicationContext(), 0, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mNotification = new NotificationCompat.Builder(
this)
// .setContentTitle("AppName")
// .setContentText("Message For Notification Drawer")
// .setSound(soundUri)
// .setDefaults(Notification.DEFAULT_SOUND)
// .setVibrate(new long[] { 1000, 1000 })
// .addAction(R.drawable.ic_launcher, "View", pIntent)
// .addAction(0, "Remind", pIntent)
// .setNumber(fCount)
// .setWhen(when)
.setSmallIcon(R.drawable.ic_launcher)
.setTicker(Integer.toString(when)) // Set String you want
.setAutoCancel(true)
.setContentIntent(pIntent);
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// notificationManager.notify(when, mNotification.build());
notificationManager.notify(1, mNotification.build());
when++;
}

Android - How to Display Large Text in Notification

I need to implement a code for displaying large text with 200 characters in Notifications. Here i used following code but it shows single line.
Intent notificationIntent;
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.icon)
.setContentTitle(context.getString(R.string.app_name))
.setContentText(message)
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true);
notificationIntent = new Intent(context, Main.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pintent = PendingIntent.getActivity(context, 0,
notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(pintent);
NotificationManager mNotifyMgr =
(NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
// Builds the notification and issues it.
mNotifyMgr.notify(1, mBuilder.build());

You can choose from different styles to use for the notification builder:
In your case I would use the NotificationCompat.BigTextStyle. More details can be found here.
Don't forget to import v4 support when using this.

In my application, notification message is static but can't show all sentense.
I solved with subText properties of notification.
Notification n = new Notification.Builder(this)
.setContentTitle("Job Tracker Application")
.setContentText("GPS is turned off.")
.setSubText("Please turn on in the settings.")
.setSmallIcon(R.drawable.app_icon)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.build();
Another notification sample have show under the blogs.
http://www.objc.io/issue-11/android-notifications.html
https://capdroid.wordpress.com/tag/android-notification/
http://www.tutorialspoint.com/android/android_notifications.htm

You add a style for the the large text.
Notification notification = new NotificationCompat.Builder(this, CHANNEL_SYNC)
.setContentTitle(title)
.setSmallIcon(R.drawable.ic_sync)
.setStyle(new NotificationCompat.BigTextStyle().bigText(message))
.setColor(getResources().getColor(R.color.colorPrimaryLight))
.setContentIntent(pendingIntent)
.build();

Android remove notification(created by mNotifyBuilder) on click

i found many answer to this, but none help :(
I have this code:
private static void generateNotification(Context context, String message) {
int icon = R.drawable.icon;
NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
int notifyID = 96;
NotificationCompat.Builder mNotifyBuilder = new NotificationCompat.Builder(context)
.setContentTitle("MyApp")
.setContentText(message)
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true)
.setSmallIcon(icon);
Notification notification = mNotifyBuilder.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
mNotificationManager.notify(notifyID, notification);
}
But if i click on notification nothing happen and it is still there. In documentation is, that i need to use:
.setAutoCancel(true)
Some one have similar problem and somebody tells him to use:
notification.flags |= Notification.FLAG_AUTO_CANCEL;
I use both, but no result :(
Thank you very much for answers. :)

I think that if you don't use an Intent with your notification, the only way to dismiss its to swipe it.
Otherwise you can use an Intent to open your activity and that will actually clear the notification:
Intent showIntent = new Intent(this, YourActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, showIntent, 0);
And to add it to the notification:
NotificationCompat.Builder mNotifyBuilder = new NotificationCompat.Builder(context)
.setContentTitle("MyApp")
.setContentText(message)
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true)
.setContentIntent(contentIntent)
.setSmallIcon(icon);
Hope this helps!

The user can dismiss all notification or if you set your notification to auto-cancel it is also removed once the user selects it.
You can also call the cancel() for a specific notification ID on the NotificationManager. The cancelAll() method call removes all of the notifications you previously issued.
Example:
mNotificationManager.cancel(notifyId);

just use this line inside button onclick event-
mNotificationManager.cancel(notifyId);//id is that u used for notification

just add
Intent showIntent = new Intent();
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, showIntent, 0);
myNotification = new Notification.Builder(getApplicationContext())
.setContentTitle("Title")
.setContentText("Text")
.setTicker("notificatio")
.setContentIntent(contentIntent)
.setDefaults(Notification.DEFAULT_ALL)
.setAutoCancel(true)
.setSmallIcon(R.drawable.ic_launcher)
.build();
add empty pending intent then on click on notification, notification will remove. it works for me.

I generally use:
mNotificationManager.cancelAll();

How to add a Dynamic image instead of notification icon in android?

I used below code for displaying notification in notification Bar.
it worked fine.
But i need to display notification icon dynamically that will come from web service.
How i can do?
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification note = new Notification(R.drawable.image,"status message", System.currentTimeMillis());
Intent in = new Intent(Notify.this,CommentU.class);
PendingIntent pi = PendingIntent.getActivity(Notify.this, 0, in, 0);
note.setLatestEventInfo(Notify.this,"NotificationTitle", "You have a new Commentio", pi);
note.number = ++count;
note.vibrate = new long[] { 500l, 200l, 200l, 500l };
note.flags |= Notification.FLAG_AUTO_CANCEL;
nm.notify(NOTIFY_ME_ID, note);
Thanks in Advance.

I have one suggestion for you: you have to download that image which you want to show and then you can set that as bitmap: check below code. I have created one BITMAP.
its look link :
for this you have to add android-support-v4.jar
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("My notification").setLargeIcon(BITMAP)
.setContentText("Hello World!");
Intent resultIntent = new Intent(this, test.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(test.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(NOTIFY_ME_ID, mBuilder.build());
for more detail chekc this link.
Removing notifications
Notifications remain visible until one of the following happens:
The user dismisses the notification either individually or by using "Clear All" (if the notification can be cleared).
The user clicks the notification, and you called setAutoCancel() when you created the notification.
You call cancel() for a specific notification ID. This method also deletes ongoing notifications.
You call cancelAll(), which removes all of the notifications you previously issued.
Edited: just replace this.
mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("My notification").setLargeIcon(BITMAP)
.setAutoCancel(true)
.setContentText("Hello World!");

just add some icons in your resource folder and then
int myIcon = R.drawable.image;
your logic goes here ....
and change value of icon according to your logic like myIcon = R.drawable.somenewimage;
and then finally set your notification
Notification note = new Notification(myIcon,"status message", System.currentTimeMillis());

Implement expand and collapse notification android

I need to implement expand and collapse notification in status bar for android 4.0 and above version. I have search on google for this but didn't getting any code solution for implementation does anybody have I idea how to implement this
Thank You in advance

An expandable Notification is a special case of a Notification Big View. If the Big View is not at the top of the notification drawer, it it shown 'closed' and is expandable by swipe. Quote from Android Developers:
A notification's big view appears only when the notification is expanded, which happens when the notification is at the top of the notification drawer, or when the user expands the notification with a gesture. Expanded notifications are available starting with Android 4.1.
The Big View Notification can be created as follows:
Notification notification = new Notification.BigTextStyle(builder)
.bigText(myText).build();
or
Notification notification = new Notification.BigPictureStyle(builder)
.bigPicture(
BitmapFactory.decodeResource(getResources(),
R.drawable.my_picture)).build();
Here is a tutorial.

Notification noti = new Notification.Builder()
... // The same notification properties as the others
.setStyle(new Notification.BigPictureStyle().bigPicture(mBitmap))
.build();
You change
.setStyle(new NotificationCompat.BigTextStyle().bigText(th_alert))
along with the announcement OK !!!
notification = new NotificationCompat.Builder(context)
Here is an example:
Expandable Notifications and Notifications Groups
You can set Code
Intent intent = new Intent(context, ReserveStatusActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
intent = new Intent(String.valueOf(PushActivity.class));
intent.putExtra("message", MESSAGE);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(PushActivity.class);
stackBuilder.addNextIntent(intent);
// PendingIntent pendingIntent =
stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
// android.support.v4.app.NotificationCompat.BigTextStyle bigStyle = new NotificationCompat.BigTextStyle();
// bigStyle.bigText((CharSequence) context);
notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(th_title)
.setContentText(th_alert)
.setAutoCancel(true)
// .setStyle(new Notification.BigTextStyle().bigText(th_alert) ตัวเก่า
// .setStyle(new NotificationCompat.BigTextStyle().bigText(th_title))
.setStyle(new NotificationCompat.BigTextStyle().bigText(th_alert))
.setContentIntent(pendingIntent)
.setNumber(++numMessages)
.build();
notification.sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
notificationManager.notify(1000, notification);
or
private void sendNotification(RemoteMessage.Notification notification, Map<String, String> data) {
Bitmap icon = BitmapFactory.decodeResource(getResources(), R.drawable.logo);
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
// .setContentTitle(notification.getTitle())
.setContentTitle(getResources().getText(R.string.app_name))
.setContentText(notification.getBody())
.setAutoCancel(true)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setContentIntent(pendingIntent)
.setStyle(new NotificationCompat.BigTextStyle().bigText(notification.getBody()))
.setContentInfo(notification.getTitle())
.setLargeIcon(icon)
.setColor(Color.RED)
.setSmallIcon(R.drawable.logo);
try {
String picture_url = data.get("picture_url");
if (picture_url != null && !"".equals(picture_url)) {
URL url = new URL(picture_url);
Bitmap bigPicture = BitmapFactory.decodeStream(url.openConnection().getInputStream());
notificationBuilder.setStyle(
new NotificationCompat.BigPictureStyle().bigPicture(bigPicture).setSummaryText(notification.getBody())
);
}
} catch (IOException e) {
e.printStackTrace();
}
notificationBuilder.setDefaults(Notification.DEFAULT_VIBRATE);
notificationBuilder.setLights(Color.YELLOW, 1000, 300);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
}
27/07/2021 :
You should can read detail this : Expandable Notifications and Notifications Groups

I Couldn't able to set new instance of new NotificationCompat.BigTextStyle() in .setStyle() method of Notification. So I have used the below one, new instance of new Notification.BigTextStyle() in .setStyle().
Notification builder =new Notification.Builder(this)
.setSmallIcon(Notification_icons[icon])
.setContentTitle(title)
.setContentText(description)
.setChannelId(channelID_Default)
.setOngoing(true)
.setStyle(new Notification.BigTextStyle()
.bigText(description))
.build();

There is a method for this function you can show a small icon when notification collapsed and show a large one when a notification expanded.
val bitmap = BitmapFactory.decodeResource(resources, R.drawable.notification)
var notification = NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.new_post)
.setContentTitle(imageTitle)
.setContentText(imageDescription)
.setLargeIcon(bitmap)
.setStyle(NotificationCompat.BigPictureStyle()
.bigPicture(bitmap)
.bigLargeIcon(null))
.build()

(2021) Stumbled upon this question when I was having issues with expanding my notification which had a larger text.
Solved by referring to the Android docs on Expandable Notifications: Create an Expandable Notification
Nimisha V's answer shows how to expand a large image on a notification. The below code is used for expanding large text on a notification.
var notification = NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.icon)
.setContentTitle(notification_title)
.setContentText(notification_message)
.setStyle(NotificationCompat.BigTextStyle()
.bigText(notification_message))
.build()

We can't create expandable notification in below android 4.1 versions.
But Instead of this we can do that we can stacked the notifications and then we can set a pending intent to our pretty custom activity which shows all notification in list.
User will happy to see this :)