LocalNotification with AlarmManager and BroadcastReceiver not firing up in Android O (oreo)

Question

I\'ve got my local notifications running on androids prior to SDK 26

But in a Android O I\'ve got the following warning, and the broadcast receiver

Answer 1

Create the AlarmManager by defining an explicit intent (explicitly define the class name of the broadcast receiver):

private static PendingIntent getReminderReceiverIntent(Context context) {
    Intent intent = new Intent("your_package_name.ReminderReceiver");
    // create an explicit intent by defining a class
    intent.setClass(context, ReminderReceiver.class);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    return pendingIntent;
}

Also do not forget to create a notification channel for Android Oreo (API 26) when creating the actual notification:

NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (VERSION.SDK_INT >= VERSION_CODES.O) {
    notificationManager.createNotificationChannel(NotificationFactory.createNotificationChannel(context));
} else {
    notificationManager.notify(NotificationsHelper.NOTIFICATION_ID_REMINDER, notificationBuilder.build());
}