Develop Reference

How to programatically minimize a Notification on Android [duplicate]

I would like to have an ongoing notification for my ForegroundService that requires as small place as possible. I like the "Android System - USB charging this device" style, but I cannot find any example how to achieve this.
Can anyone point me in the right direction?
Update
The style is given to the notification if the channel is assigned the importance IMPORTANCE_MIN.
It looks like there is no way to use Androids built in style for notifications of IMPORTANCE_MIN to be used with a ForegroundService.
Here is the description of IMPORTANCE_MIN:
Min notification importance: only shows in the shade, below the fold. This should not be used with Service.startForeground since a foreground service is supposed to be something the user cares about so it does not make semantic sense to mark its notification as minimum importance. If you do this as of Android version Build.VERSION_CODES.O, the system will show a higher-priority notification about your app running in the background.

To display a compact single line notification like the charging notification, you have to create a Notification Channel with priority to IMPORTANCE_MIN.
#TargetApi(Build.VERSION_CODES.O)
private static void createFgServiceChannel(Context context) {
NotificationChannel channel = new NotificationChannel("channel_id", "Channel Name", NotificationManager.IMPORTANCE_MIN);
NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.createNotificationChannel(channel);
}
And then create an ongoing notification like that:
public static Notification getServiceNotification(Context context) {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, "channel_id");
mBuilder.setContentTitle("One line text");
mBuilder.setSmallIcon(R.drawable.ic_notification);
mBuilder.setProgress(0, 0, true);
mBuilder.setOngoing(true);
return mBuilder.build();
}
NOTE
Please note that I've tested it with an IntentService instead of a Service, and it works. Also I've just checked setting a Thread.sleep() of 15 seconds and the notification is showing perfectly until the IntentService stops itself.
There are some images (sorry some texts are in Spanish, but I think the images are still useful):
And if you drag down and opens the notification, it's shown as follows:
EXTRA
If you notice that Android System shows a notification indicating all apps which are using battery (apps with ongoing services), you can downgrade the priority of this kind of notifications and it will appear as one line notifications like the charging notification.
Take a look at this:
Just long click on this notification, and select ALL CATEGORIES:
And set the importance to LOW:
Next time, this "battery consumption" notification will be shown as the charging notification.

You need to set the Notification priority to Min, the Notification Channel importance to Min, and disable showing the Notification Channel Badge.
Here's a sample of how I do it. I've included creating the full notification as well for reference
private static final int MYAPP_NOTIFICATION_ID= -793531;
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
String CHANNEL_ID = "myapp_ongoing";
CharSequence name = context.getString(R.string.channel_name_ongoing);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, NotificationManager.IMPORTANCE_MIN);
channel.setShowBadge(false);
notificationManager.createNotificationChannel(channel);
}
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
context, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_stat_notification_add_reminder)
.setContentTitle(context.getString(R.string.app_name))
.setContentText(context.getString(R.string.create_new))
.setOngoing(true).setWhen(0)
.setChannelId(CHANNEL_ID)
.setPriority(NotificationCompat.PRIORITY_MIN);
// Creates an intent for clicking on notification
Intent resultIntent = new Intent(context, MyActivity.class);
...
// The stack builder object will contain an artificial back stack
// for the
// started Activity.
// This ensures that navigating backward from the Activity leads out
// of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(MyActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
notificationManager.notify(MYAPP_NOTIFICATION_ID, mBuilder.build());

To answer the original question:
There seems to be no built-in way on Android O to get a single line, ongoing notification for a ForegroundService. One could try adding a custom design, but as different phones have different designs for notification, that solution is hardly a good one.
There is hope, however :)
On Android P the notification in a NotificationChannel of IMPORTANCE_LOW with a priority of PRIORITY_LOW is compacted to a single line even for a ForegroundService. Yeah!!

I made the size of foreground service notification smaller by creating an empty custom view like this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
and then creating the notification like this:
RemoteViews notifiactionCollapsed = new RemoteViews(getPackageName(),R.layout.notification_collapsed);
Notification notification = new NotificationCompat.Builder(this,CHANNEL_ID)
.setSmallIcon(R.drawable.eq_icon)
.setCustomContentView(notifiactionCollapsed)
.setStyle(new NotificationCompat.DecoratedCustomViewStyle())
.setShowWhen(false)
.setContentIntent(pendingIntent)
.setPriority(NotificationCompat.PRIORITY_LOW)
.setOngoing(true)
.setVisibility(NotificationCompat.VISIBILITY_SECRET)
.build();
startForeground(Constants.NOTIFICATION_ID.FOREGROUND_SERVICE,
notification);
This helps in reducing the height of the notification but still I am not sure about how to hide the notification icon.

How to make text appear in an android notification?

I am trying to create a notification on android in order to notify the user if something is happening. Here is my example code (called from the MainActivity)
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.stoxx_icon)
.setContentTitle("My notification")
.setContentText("Hello World!");
Intent resultIntent = new Intent(this, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
int mId = 1001;
mNotificationManager.notify(mId, mBuilder.build());
The notification is shown on the screen (no lock screen, the normal un-locked screen) and when I swipe the notification bar down (like Figure 2 in the documentation) I can see it as well, but the text is like follows:
MyApplication
Contents hidden
I was expecting to see the following content:
My notification
Hello World!
I looked in the documentation but did not find anything that I can use to solve my problem(I looked at setVisibility, but this seems to be relevant for a lock-screen only which I do not have here). Maybe I overlooked it, but maybe this does nothing have to do with a Notification. Any idea how to solve this problem?
Setting setVisibility(NotificationCompat.VISIBILITY_PUBLIC) makes the text readable even on the lock screen (not what I want) and setVisibility(NotificationCompat.VISIBILITY_SECRET) does not show the notification on the lock screen at all.
What I want:
lock-screen: notification is shown with 'Contents hidden'
unlocked screen: notification is shown with content as given in the code.
What I get with VISIBILITY_PRIVATE:
lock-screen: notification is shown with 'Contents hidden'
unlocked screen: notification is shown with 'Contents hidden'
What I get with VISIBILITY_PUBLIC:
lock-screen: notification is shown with with content as given in the code.
unlocked screen: notification is shown with with content as given in the code.
What I get with VISIBILITY_SECRET:
lock-screen: notification is not shown at all.
unlocked screen: unknown

Can we do a custom layout for notification on android wear project

I have Created a project for android wear devices.
I need to customize the notification style on the wearable device. Is there any method for that.
My method is
Intent displayIntent = new Intent(getApplicationContext(), CustomNotification.class);
PendingIntent displayPendingIntent = PendingIntent.getActivity(getApplicationContext(),
0, displayIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Notification notification =
new NotificationCompat.Builder(context)
.extend(new WearableExtender()
.setDisplayIntent(displayPendingIntent))
.build();
int notificationId = 001;
// Get an instance of the NotificationManager service
NotificationManagerCompat notificationManager =
NotificationManagerCompat.from(this);
notificationManager.notify(notificationId , notification);
But i didn't get a notification.
Is there any method to customize with my custom layout design?
and this is the manifest part
<activity android:name="com.client.android.CustomNotification"
android:exported="true"
android:allowEmbedded="true"
android:taskAffinity=""
android:theme="#android:style/Theme.DeviceDefault.Light" />

Please take a look at the official documentation about creating custom notifications on Android Wear.
Use Big View:
You can apply styles to your notificaitons, such as BigPictureStyle, BigTextStyle or InboxStyle.
Here is an example of using BigTextStyle:
// Specify the 'big view' content to display the long
// event description that may not fit the normal content text.
BigTextStyle bigStyle = new NotificationCompat.BigTextStyle();
bigStyle.bigText(eventDescription);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_event)
.setLargeIcon(BitmapFractory.decodeResource(getResources(), R.drawable.notif_background))
.setContentTitle(eventTitle)
.setContentText(eventLocation)
.setContentIntent(viewPendingIntent)
.addAction(R.drawable.ic_map, getString(R.string.map), mapPendingIntent)
.setStyle(bigStyle);
More info:http://developer.android.com/training/wearables/notifications/creating.html#BigView
Use custom notification layout:
You can create a layout in your Activity and embed it inside your notification:
https://developer.android.com/training/wearables/apps/layouts.html#CustomNotifications
NOTE: Please notice that this approach has some restrictions and will only work for notifications submitted directly from Android Wear device (not from phone).
Please also read the note at the end of that tutorial:
Note: When the notification is peeking on the homescreen, the system displays it with a standard template that it generates from the
notification's semantic data. This template works well on all
watchfaces. When users swipe the notification up, they'll then see the
custom activity for the notification.

How to create notification with statusbar text(no icon)

I am creating one notification application.
But application require text instead of icon/image.
Reference image:http://tinypic.com/view.php?pic=23hu5xd&s=6
I am using this way to create notification all of the work fine but require text on status bar.
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("hiii") // title for notification
.setContentText("Hello word") // message for notification
.setAutoCancel(false); // 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);
mNotificationManager.notify(0, mBuilder.build());
Problem:
how to set text instead of image. setSmallIcon(R.drawable.ic_launcher)

You have no choice but to set an image. You are welcome to have the image contain text.
In the screenshot you cited, the app probably has ~100 images to choose from for different percentage levels. You can organize those into a single LevelListDrawable, then use the two-parameter version of setSmallIcon() to indicate which level you want.

Android how to show notification on screen

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.