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Unable to received notification in device notification section in android

This is my code to receive notification
public class FirebaseMessageReceiver
extends FirebaseMessagingService {
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
super.onMessageReceived(remoteMessage);
sendNotification(remoteMessage.getNotification().getTitle(),remoteMessage.getNotification().getBody());
}
private void sendNotification(String messageTitle,String messageBody) {
Intent intent = new Intent(this, NotificationActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this,0 /* request code */, intent,PendingIntent.FLAG_UPDATE_CURRENT);
long[] pattern = {500,500,500,500,500};
Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentTitle(messageTitle)
.setContentText(messageBody)
.setAutoCancel(true)
.setVibrate(pattern)
.setLights(Color.BLUE,1,1)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
}
i am trying to received notification from firebase console i am able to get to get call back when fire notification i am also getting title and msg code executed successfully but i am unable to see notification in notification section of device can any one please help me what i am doing mistake .

Do you use notification channel?
If you are using Adroid 8 or higher it's expected behavior:
Starting in Android 8.0 (API level 26), all notifications must be
assigned to a channel or it will not appear.
https://developer.android.com/guide/topics/ui/notifiers/notifications#ManageChannels
Here you can find detail tutorial how to create notification channel:
https://developer.android.com/training/notify-user/channels

For devices running Android O or higher, you need to create a notification channel first in order to receive notifications like this:
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(
CHANNEL_ID,
"Channel 1",
NotificationManager.IMPORTANCE_HIGH
);
channel.setDescription("This is Channel 1");
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(channel);
}
}
Also, you need to pass this CHANNEL_ID constant in NotificationCompact.Builder constructor like this:
NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this, CHANNEL_ID)

create android notification by click in a button

I try to create android notification, when i click in a button but does not work.
this is the code that i write in button
NotificationManager Nm;
public void Notify(View view) {
NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(this)
.setContentTitle("LOGIN")
.setContentText("You are login successfully")
.setSmallIcon(R.drawable.done);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1, mBuilder.build());
}

As already stated by Ikazuchi, for android versions since android 8 you'll need to add a notification channel. This can be done, as it's shown in the documentation here: https://developer.android.com/training/notify-user/build-notification#java, like this:
createNotificationChannel();
Notification notification = new NotificationCompat.Builder(this, "channelID")
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("My notification")
.setContentText("Much longer text that cannot fit one line...")
.build();
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel serviceChannel = new NotificationChannel(
"channelID",
"Channel Name",
importance
);
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(serviceChannel);
}
}

Disable swipe removal notification in Android Oreo [duplicate]

This question already has answers here:
non removable notification
(4 answers)
Closed 4 years ago.
I am working on music application so i need to display notification on notification bar. for that i am using custom notification. The following is the code for notification for Android Oreo
String NOTIFICATION_CHANNEL_ID = "001";
RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.mynotification);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_LOW);
notificationChannel.setDescription("Channel description");
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(notificationChannel);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(MainActivity.this, NOTIFICATION_CHANNEL_ID);
notificationBuilder.setSmallIcon(R.drawable.exo_edit_mode_logo)
.setCustomContentView(notificationLayout)
.setAutoCancel(true)
.setPriority(Notification.PRIORITY_DEFAULT);
NotificationManagerCompat com = NotificationManagerCompat.from(this);
com.notify(001, notificationBuilder.build());
}
This code is working fine, but when swipe the notification from notification bar it will be removed. But my requirement is not remove when swipe the notification.
I tried with setAutoCancel(true) and setAutoCancel(false). But not working it will be removed. So how to stick the notification here.
Please guide me how to do this.
Thanks In Advance

use setOngoing(true) to achieve this

You have to add this setOngoing(true)
Try:
Notification.Builder builder = new Notification.Builder(this, CHANNEL_ID)
.setContentTitle(getString(R.string.app_name))
.setContentText("Text")
.setSmallIcon(R.mipmap.ic_launcher)
.setAutoCancel(false)
.setOngoing(true);
Notification notification = builder.build();

Android - notification does not appear in status bar

When starting an IntentService to upload a file in the background, I want to show a notification to the user that the upload is in progress by calling showNotification() from inside my service:
private void showNotification() {
Notification notification = new Notification.Builder(this)
.setSmallIcon(R.drawable.ic_cloud_upload_black_24dp)
.setWhen(System.currentTimeMillis())
.setContentTitle("Uploading")
.setContentText("Your upload is in progress.")
.setOngoing(true)
.build();
mNotificationManager.notify(NOTIFICATION_ID, notification);
}
Now here's my problem: the notification appears on the lock screen, but not in the status bar when the screen is unlocked. What am I missing?
Deployment target is API level 24, so a missing NotificationChannel should not be the cause.

try it :
PendingIntent pendingIntent = PendingIntent.getActivity(getmContext(), 0, new Intent(getmContext(), MainActivity.class), 0);
android.app.Notification pp = new NotificationCompat.Builder(getmContext())
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentText(getMessage())
.setContentIntent(pendingIntent)
.build();
NotificationManager notificationManager = (NotificationManager) getmContext().getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(0, pp);

This is my code which is working fine with target SDK 25
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
mContext);
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)
.setStyle(inboxStyle)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
.setContentText(message)
.build();
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(NOTIFICATION_ID, notification);
where NOTIFICATION_ID
public static final int NOTIFICATION_ID = 100;

I feel so dumb. Turns out the notification was displayed all the time, but with a black icon on black background.
Changed the icon colour in the xml from
android:fillColor="#FF000000"
to
android:fillColor="#FFFFFFFF"
and it works like a charm

notification.setPriority doesn't work

I set the notification priority to max, but it is still at the bottom of the notification area.
My code:
NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
.setCustomContentView(views)
.setSmallIcon(R.drawable.ic_play_24dp)
.setOngoing(true)
.setPriority(NotificationCompat.PRIORITY_MAX)
.setContentIntent(notification);
notificationmanager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationmanager.notify(0, builder.build());
How it looks:

From the android documentation :
PRIORITY_MAX was deprecated in API level 26.
Therefore Use IMPORTANCE_HIGH instead.