Method for generating local notifications including API level 26

gistfile1.txt

private static final int NOTIFICATION_ID = 1;
private static final String NOTIFICATION_CHANNEL_ID = "joblogic_notification_channel";

...

public void showNotification( String contentTitle, String contentText ) {
   int icon = R.drawable.icon;
   long when = System.currentTimeMillis();
 
 Intent notificationIntent = new Intent(this,LocalNotificationActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,notificationIntent, 0);
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
	if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
		NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "JobLogic Notifications", NotificationManager.IMPORTANCE_HIGH);

		// Configure the notification channel.
		notificationChannel.setDescription("JobLogic");
		notificationChannel.enableLights(true);
		notificationChannel.setLightColor(Color.RED);
		notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
		notificationChannel.enableVibration(true);
		notificationManager.createNotificationChannel(notificationChannel);
		

		Notification n= new Notification.Builder(this,NOTIFICATION_CHANNEL_ID)
                .setContentTitle(contentTitle)
                .setContentText(contentText)
                .setSmallIcon(icon)
                .setAutoCancel(true)
				.setContentIntent(pendingIntent)
                .build();

				notificationManager.notify(NOTIFICATION_ID, n);
	}

	NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
			.setVibrate(new long[]{0, 100, 100, 100, 100, 100})
			.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
			.setSmallIcon(icon)
			.setContentIntent(pendingIntent)
			.setContentTitle(contentTitle)
			.setContentText(contentText);

	notificationManager.notify(NOTIFICATION_ID, builder.build());
}