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Я хочу получать обновления событий календаря (при добавлении нового события или удалении существующего события) на устройствах Android 2.2? я новичок, поэтому расскажите мне пошаговое решение для этого..

Этот код может вам помочь 🙂

 public class myCalendar 
{

static Cursor cursor;

public static void readCalendar(Context context) {

    ContentResolver contentResolver = context.getContentResolver();

    // Fetch a list of all calendars synced with the device, their display names and whether the
    // user has them selected for display.


    cursor = contentResolver.query(Uri.parse("content://com.android.calendar/calendars"),
                (new String[] { "_id", "displayName", "selected"}), null, null, null);


    HashSet<String> calendarIds = new HashSet<String>();

    try
    {
        System.out.println("Count=" cursor.getCount());
        if(cursor.getCount() > 0)
        {
            System.out.println("the control is just inside of the cursor.count loop");
        while (cursor.moveToNext()) {

             String _id = cursor.getString(0);
             String displayName = cursor.getString(1);
             Boolean selected = !cursor.getString(2).equals("0");

            System.out.println("Id: "   _id   " Display Name: "   displayName   " Selected: "   selected);
            calendarIds.add(_id);
        }
    }
    }
    catch(AssertionError ex)
    {
        ex.printStackTrace();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }


    // For each calendar, display all the events from the previous week to the end of next week.        
    for (String id : calendarIds) {
        Uri.Builder builder = Uri.parse("content://com.android.calendar/instances/when").buildUpon();
        //Uri.Builder builder = Uri.parse("content://com.android.calendar/calendars").buildUpon();
        long now = new Date().getTime();

        ContentUris.appendId(builder, now - DateUtils.DAY_IN_MILLIS * 10000);
        ContentUris.appendId(builder, now   DateUtils.DAY_IN_MILLIS * 10000);

        Cursor eventCursor = contentResolver.query(builder.build(),
                new String[]  { "title", "begin", "end", "allDay"}, "Calendars._id="   1,
                null, "startDay ASC, startMinute ASC");

        System.out.println("eventCursor count=" eventCursor.getCount());
        if(eventCursor.getCount()>0)
        {

            eventCursor.moveToFirst();

            while (eventCursor.moveToNext())
            {
                Object beg_date,beg_time,end_date,end_time;  

                final String title = eventCursor.getString(0);
                final Date begin = new Date(eventCursor.getLong(1));
                final Date end = new Date(eventCursor.getLong(2));
                final Boolean allDay = !eventCursor.getString(3).equals("0");

        /*  System.out.println("Title: "   title   " Begin: "   begin   " End: "   end  
                    " All Day: "   allDay);
        */  
                System.out.println("Title:" title);
                System.out.println("Begin:" begin);
                System.out.println("End:" end);
                System.out.println("All Day:" allDay);

                System.out.println("only date begin of events=" begin.getDate());
                System.out.println("only begin time of events=" begin.getHours()   ":"  begin.getMinutes()   ":"  begin.getSeconds());

                System.out.println("only date begin of events=" end.getDate());
                System.out.println("only begin time of events=" end.getHours()   ":"  end.getMinutes()   ":"  end.getSeconds());

                beg_date = begin.getDate();
                beg_time = begin.getHours() ":" begin.getMinutes();

                end_date = end.getDate();
                end_time = end.getHours() ":" end.getMinutes();





            }
        }
        break;
    }
}


}