Develop Reference

How to get notifications of newly added data in firestore android studio?

I am doing a notification on my app and I am using firestore. My problem is I want to send a notification to the user when the snapshotlistener detect a newly added data to the database But when I open the app it will show the existing notification right away even though i did not added a new data. I need some conditions where I can only get the newly added data or if there's something lacking in my database data that will need in order to overcome this issue. Below is my databse structure.
db.collection("Buyers")
.document(userID)
.collection("Notifications")
.addSnapshotListener(new EventListener<QuerySnapshot>() {
#Override
public void onEvent(#Nullable QuerySnapshot snapshots, #Nullable FirebaseFirestoreException e) {
if (e != null) {
Log.e(LOG_DB, e.toString());
return;
}
for (DocumentChange dc : snapshots.getDocumentChanges()) {
if (dc.getType() == DocumentChange.Type.ADDED) {
String title = dc.getDocument().getData().get("notificationTitle").toString();
String body = dc.getDocument().getData().get("notificationBody").toString();
//Method to set Notifications
getNotification(title, body);
}
}
}
});

If you just want to send notifications, you can use Firebase Cloud Messages which may provide the functionality you are trying to implement yourself.
https://firebase.google.com/docs/cloud-messaging
If you want to send a Notification after data is changed in your Firestore you can use FireStore Triggers (https://firebase.google.com/docs/functions/firestore-events) and send a Notification via a firebase function call (Send push notifications using Cloud Functions for Firebase)

I had a similar issue and this is how I solved it:
Get a count of your current items added and save in Shared Preferences
Upon opening the app get the current count of items and compare with the saved number in shared preferences
Set a condition where if the current count of item is more than the saved number in shared preferences, the notification is called.

I am able to get what I want but I am not sure if this is the right way to do this.
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.MINUTE, -5);
Date before = calendar.getTime();
Calendar calendar1 = Calendar.getInstance();
Date until = calendar1.getTime();
for (DocumentChange dc : snapshots.getDocumentChanges()) {
Date date = (Date) dc.getDocument().getData().get("notificationDate");
if (dc.getType() == DocumentChange.Type.ADDED) {
if (!before.after(date) && !until.before(date)){
Log.d("life", "Data: "+date);
String title = dc.getDocument().getData().get("notificationTitle").toString();
String body = dc.getDocument().getData().get("notificationBody").toString();
getNotification(title, body);
}
}
}
What i have done here was I retrieve the current and the current time minus 5 mins.(You can choose how many delayed the mins you want) then made a condition where it must only show the notifications within the 5mins delayed date.
Note:
I know this was not the proper practice but this gets the result that I want. If you didn't want my answer please let me know and post your own answer so I can acknowledge your answer.

How to create new event in Google Calendar API with java in NetBeans

I followed the quickstart guide that Google provides on Calendar API https://developers.google.com/google-apps/calendar/quickstart/java but they dont explain how to create a new event. I found this snippet of code online
public void createEvent(Calendar cal){
Event event = new Event();
event.setSummary("Event name here");
event.setLocation("event place here");
Date startDate = new Date();
Date endDate = new Date(startDate.getTime() + 3600000);
DateTime start = new DateTime(startDate, TimeZone.getTimeZone("UTC"));
event.setStart(new EventDateTime().setDateTime(start));
DateTime end = new DateTime(endDate, TimeZone.getTimeZone("UTC"));
event.setEnd(new EventDateTime().setDateTime(end));
Event createdEvent = cal.events().insert("primary", event).execute();
System.out.println("Created event id: " + createdEvent.getId());
}
But it didn't help me, i got an error in the Event createdEvent = cal.events() section as events() doesn't exist. Any help is much appreciated, thank you.

At the bottom of your link to the documentation there is a link to Create Events. I won't duplicate the entire page here, but the gist is that you need to Create an Event object (perhaps called MyNewEvent), populate it, and then call:
MyNewEvent = service.events().insert("Some Calendar Id", MyNewEvent).execute();

Creating Meeting lotus Meeting using ICall

In a eclipse plugin for the Lotus Notes client I need to create a meeting in a user's mailfile. I have created successfully an appointment in my own mailfile using the NotesCalendar object. (see code below ). What I don't seem to get right is to create a meeting instead of an appointment. On the database level the difference is made by a field called appointmenttype which is set to 3 in the case of a meeting and 0 in the case of a appointment.
According to resources I found I need to add the xProperty "X-LOTUS-APPTTYPE" with a value of "3" to my Ical4j object but for some reason this is not being processed by the NotesCalendar.createEntry() method.
Does someone have any idea how to create a Meeting in a mailfile using the NotesCalendar notes classes and Ical4j?
(the reason I have added the xPages tag is that I hope someone in the xPages community ever has used the notescalendar objects before )
Code that creates an appointment:
DateTime meetingStart = new DateTime(c.getStartTime().getTime());
DateTime meetingEnd = new DateTime(c.getEndTime().getTime());
VEvent meeting = new VEvent(meetingStart, meetingEnd, c.getSubject());
// Add chair
Attendee chairAttendee = new Attendee(URI.create("mailto:j.somhorst#development.acuity.nl"));
chairAttendee.getParameters().add(Role.CHAIR);
// Add invitees
for(User invitee : c.getUserParticipants()){
Attendee attendee = new Attendee(URI.create("mailto:"+invitee.getEmail()));
attendee.getParameters().add(Role.REQ_PARTICIPANT);
meeting.getProperties().add(attendee);
}
// create calendar for ics export
Calendar call = new Calendar();
call.getProperties().add(new ProdId("-//Lotus Development Corporation//NONSGML Notes 9.0.1//EN_API_C"));
call.getComponents().add(meeting);
// notes specific fields
meeting.getProperties().add(new XProperty("X-LOTUS-NOTESVERSION","2"));
meeting.getProperties().add(new XProperty("X-LOTUS-APPTTYPE","3"));
NotesCalendar notesCalendar = NotesUtil.getNotesCalendar(s);
if(notesCalendar!=null){
notesCalendar.setAutoSendNotices(false);
NotesCalendarEntry entry = notesCalendar.createEntry(call.toString());
String icallvalue = entry.read();
System.out.println(icallvalue);
}

how to create a lotus notes meeting using java in domino designer

Hi i am trying to create meeting in lotus notes using java.i am able to send a meeting invite to the recipients.But when i send a meeting the options available to the chair and the recipients are the same.(options like accept,decline).But the options for the chair and the recipients should be different.can anyone please tell how to do this?
public DocumentKey save(final Session session, final Database db, boolean send,
String moveToFolder) throws NotesException, Io Exception {
//setBody(null);
Document doc = null;
RichTextItem rti = null;
try {
doc = db.createDocument();
db.getView(ServiceConstants.MEETINGS);
// Here i am setting all the properties for that document.
// I cant post that code as it has
// over 100 properties, so more than 100 lines of code
rti = doc.createRichTextItem(ServiceConstants.BODY);
rti.appendText(getBody());
if ((attachment != null) && (attachment.length > 0)) {
for (int i = 0; i < attachment.length; i++) {
attachment[i].save(rti);
}
}
doc.save(true, true, true);
if (send) {
doc.send();
}
if (!isBlank(moveToFolder)) {
doc.putInFolder(moveToFolder, true);
}
setKey(new DocumentKey(doc.getNoteID()));
} finally {
Helper.cleanupIfNeeded(rti);
Helper.cleanupIfNeeded(doc);
}
return getKey();
}

To successfully schedule a meeting, you need to follow the calendaring and scheduling schema
In short: A meeting has to be created in the chair's mail file and the invitations have to be responses (doc.MakeResponse(...)) to that main document and sent via mail. The "ApptUnid"- item ties them all together.
Read the documentation in the link, it is very good

If you are using Notes / Domino 9.0 or greater, you should consider using the lotus.domino.NotesCalendar interface and its related interfaces. These relatively new interfaces let you create, read and update calendar entries using iCalendar format.
Here's some sample code:
// Get the NotesCalendar object from the database
NotesCalendar notesCalendar = session.getCalendar(database);
if ( notesCalendar == null ) {
throw new Exception("Cannot open calendar.");
}
// Create a meeting in iCalendar format
String ical = iCalendarMeeting();
// Create the meeting on the Notes calendar
NotesCalendarEntry entry = notesCalendar.createEntry(ical);
This code creates an instance of NotesCalendar from an instance of Database. Then it gets the representation of a meeting in iCalendar format (the iCalendarMeeting method is not shown). Finally, it calls NotesCalendar.createEntry() to create the meeting. The createEntry method places the meeting on the organizer's calender and sends an invitation to all attendees.

Choose Non-default googlecalendar with google-java-client-api

I want to get all the Calendars, which are in my GoogleAccount, using the google java client API.
In my application I want that a user can choose in wich calendar his events will be saved (not only in the default). But therefore I need their CalendarIDs. I don't want that the users have to search their calendar ids to write them by hand into the app.
Would it be possible to create a new Calendar in his account, to write all the events in this new one.
Sorry for my bad English.

Yes of course it is possible.You only have to know the calendarId in which you want to save the new event, and use them with the event insert function.
For example :
Event event = new Event();
event.setSummary("This is my Event");
event.setLocation("127.0.0.1 -- Home sweet Home!!");
ArrayList<EventAttendee> participants = new ArrayList<EventAttendee>();
participants .add(new EventAttendee().setEmail("member#domain.com"));
event.setAttendees(participants);
DateTime start = new DateTime(new Date(), TimeZone.getTimeZone("UTC"));
event.setStart(new EventDateTime().setDateTime(start));
DateTime end = new DateTime(new Date(startDate.getTime() + 3600000), TimeZone.getTimeZone("UTC"));
event.setEnd(new EventDateTime().setDateTime(end));
Event createdEvent = service.events().insert("YourCalendarID", event).execute();
Hope this could help you!