getCalendarById(1), null pointer exception

Question

getCalendarById(1), null pointer exception

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Dear all .. I'm trying to add events to Android calendar using the code in the API

var CALENDAR_TO_USE = 1;
var calendar = Ti.Android.Calendar.getCalendarById(CALENDAR_TO_USE);
 
// Create the event
var eventBegins = new Date(2010, 11, 26, 12, 0, 0);
var eventEnds = new Date(2010, 11, 26, 14, 0, 0);
var details = {
    title: 'Do some stuff',
    description: "I'm going to do some stuff at this time.",
    begin: eventBegins,
    end: eventEnds
};
 
var event = calendar.createEvent(details);
 
// Now add a reminder via e-mail for 10 minutes before the event.
var reminderDetails = {
    minutes: 10,
    method: Ti.Android.Calendar.METHOD_EMAIL
};
event.createReminder(reminderDetails);

the calendar ID is 1 , which is the main native android calendar, everything goes will when opening the application for the first time on my HTC hero device

if I close the app. and then reopen it again .. an error appear in

var calendar = Ti.Android.Calendar.getCalendarById(CALENDAR_TO_USE);

which is "NullPointerException"

I don't know why, it works for first time opening but it doesn't for the second time??!!

3 Answers

Your Answer

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sometimes it works well for the next time, but surely it is not after opening the calendar and then reopen the application

— commented 2 years ago by Haya aziz
Please .. I need a help It seems like can't access the calendar twice !! if I kill the app using 'advanced task killer' then reopen it, it works well !

is there anyway to kill the app by the code , so it will not work in the back ground

— commented 2 years ago by Haya aziz

Accepted Answer

Accepted Answer

I faced the same problem and after a lot of experiments finally able to fix this problem. Declare the calendar object in app.js file only.

var CALENDAR_TO_USE = 1;
var calendar = Ti.Android.Calendar.getCalendarById(CALENDAR_TO_USE);

Now pass this calendar object to the other .js file in which you are creating event like

var win2 = Titanium.UI.createWindow({
    url:'win2.js',
    title:'New Window',
    calendarReference:calendar
});
win2.open({modal:true});

Now use this reference to save events in win2.js file.

var currentWindow = Ti.UI.currentWindow;
var event = currentWindow.calendarReference.createEvent(details);

Now it's working fine for me. Hope this helps you.

Answer 2

Use exitOnClose to kill the application when you use android back button. i will try some workarounds when i go to my home.

Answer 3

The same code?but I do not know why my code doesnt work.

Titanium.UI.setBackgroundColor('#3333');

var win = Ti.UI.createWindow({ layout:'vertical', backgroundColor:"red" });

var CALENDAR_TO_USE = 1; var calendar = Ti.Android.Calendar.getCalendarById(CALENDAR_TO_USE);

var eventBegins = new Date(2011, 12, 31, 17, 20, 0); var eventEnds = new Date(2011, 12, 31, 17, 21, 0); var details = { title: 'Do some stuff', description: "I'm going to do some stuff at this time.", begin: eventBegins, end: eventEnds };

var event = calendar.createEvent(details);

// Now add a reminder via e-mail for 1 minutes before the event. var reminderDetails = { minutes: 1, method: Ti.Android.Calendar.METHOD_EMAIL }; event.createReminder(reminderDetails);

win.open();