问题描述
我有一个处理同步日历和活动的同步适配器。我能够删除正常的活动就好了。但每当我删除重复发生的事件，我的日历中所有活动消失了。
I have a sync adapter that handles syncing calendars and events. I am able to delete normal events just fine. But whenever I delete a recurring event, all the events on my calendar disappear.
有一件事我注意到的是，每当我删除重复发生的事件，在实例表被清空，这也解释了消失的事件。在活动如预期表中，与经常性活动的行从表中删除。
One thing I noticed is that whenever I deleted a recurring event, the Instances table is emptied, which explains the events disappearing. The Events table is as expected, with the recurring event row deleted from the table.
是什么原因造成的？
我曾尝试删除在以下几个方面：
I have tried deleting in the following ways:
resolver.delete(
ContentUris.withAppendedId(Events.CONTENT_URI, id),
null,
null
);
resolver.delete(
Events.CONTENT_URI,
Events._ID + " = ?",
new String[]{id}
);
，也可以作为 SyncAdapter ：
resolver.delete(
Events.CONTENT_URI.buildUpon()
.appendQueryParameter(CalendarContract.CALLER_IS_SYNCADAPTER, "true")
.appendQueryParameter(Calendars.ACCOUNT_NAME, account.name)
.appendQueryParameter(Calendars.ACCOUNT_TYPE, account.type)
.build(),
Events._ID + " = ?",
new String[]{id}
);
所有的方法对非经常性项目正常运行，但所有导致实例删除重复发生的事件时，被清空表。
All methods work correctly on non-recurring events, but all cause the Instances table to be emptied when deleting a recurring event.
更新
一件事我注意到的是，LogCat中吐出以下错误
One thing I noticed is that the LogCat spits out the following error
- 应用程序：
system_process - 标签：
BufferQueue - PID：
1187 - TID：
1518
- Application:
system_process - Tag:
BufferQueue - PID:
1187 - TID:
1518
[com.android.calendar / com.android.calendar.AllInOneActivity] BufferQueue：drainQueueLocked：超时等待的消费者
推荐答案
这竟然是我的一部分错误。当我的 SyncAdapter 被添加日历到数据库中，我并没有正确设置字段 SYNC_EVENTS （http://developer.android.com/reference/android/provider/CalendarContract.CalendarColumns.html#SYNC_EVENTS).具体而言，本场应设置为 1 。
It turned out to be an error on my part. When my SyncAdapter was adding calendars to the database, I was not properly setting the field SYNC_EVENTS (http://developer.android.com/reference/android/provider/CalendarContract.CalendarColumns.html#SYNC_EVENTS). Specifically, this field should be set to 1.
这是很难知道，这是问题，因为我仍然能够在技术上同步（推事件到服务器，并拉离服务器的事件），但我只是运行到我的活动消失的问题。
It was difficult to know that this was the issue because I was still able to technically "sync" (push events to the server and pull events from the server), but I was just running into the issue my events disappearing.
我希望这可以帮助别人了。
I hope this helps someone else too.
这篇关于Android的CalendarContract，删除重复事件导致所有事件消失日历吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！