Develop Reference

Why my notification does not work in android TV emulator?

I am trying to implement an android TV application by using android studio and TV emulator.
I call the following code blocks at the onCreate function of the main activity. It is running for android mobile devices but not working on the Android TV emulator.
String channel_name = "myChannel";
String channel_description = "mySChannel";
String CHANNEL_ID = "idididf";
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_my_icon)
.setContentTitle("My notification")
.setContentText("Much longer text that cannot fit one line...")
.setStyle(new NotificationCompat.BigTextStyle()
.bigText("Much longer text that cannot fit one line..."))
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
CharSequence name = channel_name;
String description = 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 behaviors after this
notificationManager.createNotificationChannel(channel);
}
notificationManager.notify(12312, builder.build()); // 0 is the request code, it should be unique id
Any idea?

With very few exceptions, notifications are not shown on Android TV.

Android notification importance cannot be changed

Code Summary:
NotificationCompat.Builder notification;
NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
...
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_TITLE, importance);
manager.createNotificationChannel(channel);
notification.setChannelId(CHANNEL_ID);
manager.notify(notificationId, 0, notification.build());
manager.getImportance() returns always 3(IMPORTANCE_DEFAULT).
How can I change importance?

Once you submit the channel to the NotificationManager, you cannot
change the importance level. However, the user can change their
preferences for your app's channels at any time.
https://developer.android.com/training/notify-user/channels
The solution is to guide user to notification settings and allow him to modify your channel. To open a channel in android settings there is an intent:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
final Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
intent.putExtra(Settings.EXTRA_APP_PACKAGE, getActivity().getPackageName());
intent.putExtra(Settings.EXTRA_CHANNEL_ID, channelID);
if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
startActivity(intent);
} else {
Toast.makeText(getActivity(), R.string.not_found, Toast.LENGTH_LONG).show();
}
}
Another solution is to create a new channel and use that channel but user always sees all channels that you have created in Android Settings

Action icon added in notification not showing up

I am trying to create a notification for Incoming call. For that I have added two actions in notification. My action text only is displayed.Action icon is not displayed in notification.
I want to add icon near Answer and cancel which I added as AddAction in Notification. I have added action icon like below,
NotificationCompat.Action answerAction = new NotificationCompat.Action.Builder(R.drawable.answer_call_icon, "Answer", pendingIntent).build();
NotificationCompat.Action cancelAction = new NotificationCompat.Action.Builder(R.drawable.cancel, "Cancel", pendingIntent).build();
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
.setLargeIcon((BitmapFactory.decodeResource(getResources(), R.drawable.call_logo)))
.setContentTitle(intent.getStringExtra("Number"))
.setSmallIcon(R.drawable.call_logo)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.setFullScreenIntent(pendingIntent, true)
.setCategory(NotificationCompat.CATEGORY_CALL)
.addAction(answerAction)
.addAction(cancelAction)
.setPriority(NotificationCompat.PRIORITY_HIGH);
NotificationManagerCompat nManager = NotificationManagerCompat.from(this);
nManager.notify(2,builder.build());
One more query,
Below is my notification channnel,
NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_HIGH);
chan.setLightColor(Color.BLUE);
chan.setLockscreenVisibility(Notification.FLAG_FOREGROUND_SERVICE);
chan.setImportance(NotificationManager.IMPORTANCE_HIGH);
chan.setSound(defaultRingToneUri,audioAttributes);
chan.enableLights(true);
chan.shouldShowLights();
chan.setVibrationPattern(vibrate);
chan.enableVibration(true);
Context context=getApplicationContext();
NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
manager.createNotificationChannel(chan);
Not able to get ringtone while receiving notification. Is the way Im setting sound is right??
Anybody please help me to solve this...
Posted 2 days ago..but till now not able to find solution.

As per the Notifications in Android N blog post:
Notification actions have also received a redesign and are now in a visually separate bar below the notification.
You’ll note that the icons are not present in the new notifications; instead more room is provided for the labels themselves in the constrained space of the notification shade. However, the notification action icons are still required and continue to be used on older versions of Android and on devices such as Android Wear.
So it is expected that you do not see the icons associated with notification actions.

If you need more flexibility in creating the notification layout, go for the custom one.
Ref: https://developer.android.com/training/notify-user/custom-notification
Use the Drawable left/right option to set an icon with text in the button.
// Get the layouts to use in the custom notification
RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.notification_small);
RemoteViews notificationLayoutExpanded = new RemoteViews(getPackageName(), R.layout.notification_large);
// Apply the layouts to the notification
Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.notification_icon)
.setStyle(new NotificationCompat.DecoratedCustomViewStyle())
.setCustomContentView(notificationLayout)
.setCustomBigContentView(notificationLayoutExpanded)
.build();

As I understand: you have a problem with your notification you can use this method :
private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.addLine(message);
Notification notification;
notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentTitle(title)
.setContentIntent(resultPendingIntent)
.setSound(alarmSound)
.setStyle(inboxStyle)
.setWhen(getTimeMilliSec(timeStamp))
.setContentText(message)
.build();
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(Constant.NOTIFICATION_ID, notification);
}
or this one :
private void showBigNotification(Bitmap bitmap, NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {
NotificationCompat.BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
bigPictureStyle.setBigContentTitle(title);
bigPictureStyle.setSummaryText(Html.fromHtml(message).toString());
bigPictureStyle.bigPicture(bitmap);
Notification notification;
notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentTitle(title)
.setContentIntent(resultPendingIntent)
.setSound(alarmSound)
.setStyle(bigPictureStyle)
.setWhen(getTimeMilliSec(timeStamp))
.setContentText(message)
.build();
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(Constant.NOTIFICATION_ID_BIG_IMAGE, notification);
}

To play ringtone you can make use of android mediaplayer as shown below:
Var _mediaPlayer = MediaPlayer.Create(this,
Android.Provider.Settings.System.DefaultRingtoneUri);
_mediaPlayer.Start();
Task.Delay(60 * 1000).ContinueWith(t => _mediaPlayer?.Stop()); //stop after 60sec
You can take the global instance of _mediaPlayer and stop this as per user interaction with notification.
This is the c# xamarin android example, you can use the same class with java syntax.

Android notification not showing on Oreo

I have a simple notification which works for me on older androids. But this same notification doesnt pop up on my phone with android oreo. I read that i need to assign channel with notification, which i did. But still, it doesnt pop up.
Thanks
My code -
String CHANNEL_ID = "my_channel_01";
String name = "notification";
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, name, importance);
NotificationManager mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification.Builder(this,CHANNEL_ID)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
.setChannelId(CHANNEL_ID)
.build();

I think you are missing mManager.createNotificationChannel(mChannel);

Disabling Oreo Notification dot

On Oreo (API 18), I don't want to use notification dot.
But it show notification dot default.
For instance, YouTube push notification but don't use notification dot.
I'am using NotificationChannel
And I tried using
NotificationChannel.setShowBadge(false)
But it didn't work.
How can I do this?
youtube - has no notification dot
myApp - has notification dot

When you create your notification under Oreo you must create a channel instance and assign it to the notification. You use setShowBadge on your instance.
Below is my code which correctly removes the badge.
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
String CHANNEL_ID = "my_channel";
CharSequence name = context.getString(R.string.channel_name);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, NotificationManager.IMPORTANCE_LOW);
channel.setShowBadge(false);
notificationManager.createNotificationChannel(channel);
}
NotificationCompat.Builder builder = new NotificationCompat.Builder(
context, CHANNEL_ID).setSmallIcon(iconID)
.setContentTitle(task.taskTitle)
.setContentText(task.taskNote).setOngoing(true).setWhen(0)
.setChannelId(CHANNEL_ID)
.setSound(null)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
notificationManager.notify(task.driveId, NOTIFICATION_ID, builder.build());