如何删除日历中的特定事件

发布于 2024-11-28 01:35:50 字数 1429 浏览 3 评论 0原文

我想要做的是仅删除我在日历中保存的内容,而不是删除日历中已存在的所有内容。为此,我使用以下代码。但它会删除日历的所有内容。那么谁能告诉我如何防止这种情况发生?

Uri CALENDAR_URI = Uri.parse("content://calendar/events");
ContentResolver cr = getContentResolver();
cr.delete(CALENDAR_URI, null, null); // Delete all



ContentValues values = new ContentValues();
values.put("calendar_id", 1);
values.put("title", this.title);
values.put("allDay", this.allDay);
values.put("dtstart", this.dtstart.toMillis(false));
values.put("dtend", this.dtend.toMillis(false));
values.put("description", this.description);
values.put("eventLocation", this.eventLocation);
values.put("visibility", this.visibility);
values.put("hasAlarm", this.hasAlarm);

cr.insert(CALENDAR_URI, values);

所以我想要的只是删除我放置的条目。

删除活动

Uri EVENTS_URI = Uri.parse("content://com.android.calendar/" + "events");
            
ContentResolver cr = c.getContentResolver();
deleteEvent(cr, EVENTS_URI, 1);

private void deleteEvent(ContentResolver resolver, Uri eventsUri, int calendarId) {
        Cursor cursor;     
        cursor = resolver.query(eventsUri, new String[]{ "_id" },     "calendar_id=" + calendarId, null, null);
        while(cursor.moveToNext()) {
            long eventId = cursor.getLong(cursor.getColumnIndex("_id"));
            resolver.delete(ContentUris.withAppendedId(eventsUri, eventId), null, null);
        }
        cursor.close();
    }

What I want to do is to delete only the content that is saved by me in the calendar instead of all the content which is already present in the calendar. For that, I use the following code. But it will delete all the content of the calendar. So can anyone tell me how that can be prevented?

Uri CALENDAR_URI = Uri.parse("content://calendar/events");
ContentResolver cr = getContentResolver();
cr.delete(CALENDAR_URI, null, null); // Delete all



ContentValues values = new ContentValues();
values.put("calendar_id", 1);
values.put("title", this.title);
values.put("allDay", this.allDay);
values.put("dtstart", this.dtstart.toMillis(false));
values.put("dtend", this.dtend.toMillis(false));
values.put("description", this.description);
values.put("eventLocation", this.eventLocation);
values.put("visibility", this.visibility);
values.put("hasAlarm", this.hasAlarm);

cr.insert(CALENDAR_URI, values);

So what I want is to delete only that entry that is put by me.

Deleting the event

Uri EVENTS_URI = Uri.parse("content://com.android.calendar/" + "events");
            
ContentResolver cr = c.getContentResolver();
deleteEvent(cr, EVENTS_URI, 1);

private void deleteEvent(ContentResolver resolver, Uri eventsUri, int calendarId) {
        Cursor cursor;     
        cursor = resolver.query(eventsUri, new String[]{ "_id" },     "calendar_id=" + calendarId, null, null);
        while(cursor.moveToNext()) {
            long eventId = cursor.getLong(cursor.getColumnIndex("_id"));
            resolver.delete(ContentUris.withAppendedId(eventsUri, eventId), null, null);
        }
        cursor.close();
    }

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聆听风音 2024-12-05 01:35:50

从日历中读取数据后,只需尝试一下。

将单次事件添加到日历

要将条目添加到特定日历,我们需要配置一个日历条目以使用 ContentValues 插入,如下所示:

ContentValues event = new ContentValues();

每个事件都需要绑定到特定的日历,因此您要设置的第一件事是要插入此事件的日历的标识符:

event.put("calendar_id", calId);

然后我们设置有关该事件的一些基本信息,包括字符串字段,例如事件标题、描述和位置。

event.put("title", "Event Title");
event.put("description", "Event Desc");
event.put("eventLocation", "Event Location");

有许多不同的选项可用于配置事件的时间和日期。

我们可以按如下方式设置事件开始和结束信息:

long startTime = START_TIME_MS;
long endTime = END_TIME_MS;
event.put("dtstart", startTime);
event.put("dtend", endTime);

如果要添加生日或假期,我们会将条目设置为全天事件:

event.put("allDay", 1);   // 0 for false, 1 for true

此信息对于大多数条目来说已经足够了。但是,还有许多其他有用的日历条目属性。

例如,您可以将事件状态设置为暂定 (0)、已确认 (1) 或已取消 (2):

event.put("eventStatus", 1);

您可以通过将事件的可见性设置为默认 (0)、机密 (1)、私有 ( 2) 或公共 (3):

event.put("visibility", 0);

您可以通过将事件的透明度设置为不透明 (0) 或透明 (1) 来控制日历上的事件是否消耗时间(可能存在计划冲突)。

event.put("transparency", 0);

您可以控制事件是否触发提醒警报,如下所示:

event.put("hasAlarm", 1); // 0 表示 false,1 表示 true

正确配置日历事件后,我们就可以使用 ContentResolver 将新的日历条目插入到日历事件的相应 Uri 中

 Uri eventsUri = Uri.parse("content://calendar/events");
  Uri url = getContentResolver().insert(eventsUri, event);

: insert() 方法联系日历内容提供者并尝试将条目插入到适当的用户日历中。如果您导航到日历应用程序并启动它,您应该在相应的日历中看到您的日历条目。由于日历同步,如果您在网络上使用 Google 日历,您还会在线看到日历条目。

删除活动

 private int DeleteCalendarEntry(int entryID) {
        int iNumRowsDeleted = 0;

        Uri eventsUri = Uri.parse(getCalendarUriBase()+"events");
        Uri eventUri = ContentUris.withAppendedId(eventsUri, entryID);
        iNumRowsDeleted = getContentResolver().delete(eventUri, null, null);

        Log.i(DEBUG_TAG, "Deleted " + iNumRowsDeleted + " calendar entry.");

        return iNumRowsDeleted;
    }

另请通过此链接进行删除

After reading the data from the Calendar just try this out..

Adding a Single-Occurrence Event to a Calendar

To add an entry to a specific calendar, we need to configure a calendar entry to insert using the ContentValues as follows:

ContentValues event = new ContentValues();

Each event needs to be tied to a specific Calendar, so the first thing you're going to want to set is the identifier of the Calendar to insert this event into:

event.put("calendar_id", calId);

We then set some of the basic information about the event, including String fields such as the event title, description and location.

event.put("title", "Event Title");
event.put("description", "Event Desc");
event.put("eventLocation", "Event Location");

There are a number of different options for configuring the time and date of an event.

We can set the event start and end information as follows:

long startTime = START_TIME_MS;
long endTime = END_TIME_MS;
event.put("dtstart", startTime);
event.put("dtend", endTime);

If we are adding a birthday or holiday, we would set the entry to be an all day event:

event.put("allDay", 1);   // 0 for false, 1 for true

This information is sufficient for most entries. However, there are a number of other useful calendar entry attributes.

For example, you can set the event status to tentative (0), confirmed (1) or canceled (2):

event.put("eventStatus", 1);

You can control who can see this event by setting its visibility to default (0), confidential (1), private (2), or public (3):

event.put("visibility", 0);

You can control whether an event consumes time (can have schedule conflicts) on the calendar by setting its transparency to opaque (0) or transparent (1).

event.put("transparency", 0);

You can control whether an event triggers a reminder alarm as follows:

event.put("hasAlarm", 1); // 0 for false, 1 for true

Once the calendar event is configured correctly, we're ready to use the ContentResolver to insert the new calendar entry into the appropriate Uri for calendar events:

 Uri eventsUri = Uri.parse("content://calendar/events");
  Uri url = getContentResolver().insert(eventsUri, event);

The call to the insert() method contacts the Calendar content provider and attempts to insert the entry into the appropriate user Calendar. If you navigate to the Calendar application and launch it, you should see your calendar entry in the appropriate Calendar. Since the Calendar syncs, you will also see the Calendar entry online, if you're using the Google Calendar on the web.

Delete the event

 private int DeleteCalendarEntry(int entryID) {
        int iNumRowsDeleted = 0;

        Uri eventsUri = Uri.parse(getCalendarUriBase()+"events");
        Uri eventUri = ContentUris.withAppendedId(eventsUri, entryID);
        iNumRowsDeleted = getContentResolver().delete(eventUri, null, null);

        Log.i(DEBUG_TAG, "Deleted " + iNumRowsDeleted + " calendar entry.");

        return iNumRowsDeleted;
    }

Also go through this link for deleting

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