android 根据重复日程实例ID获取所有重复实例 demo
时间: 2023-11-12 19:05:37 浏览: 36
以下是一个简单的Android代码示例,可以根据重复日程实例ID获取所有重复实例:
首先,您需要使用以下代码获取重复日程实例ID:
```
long eventId = 12345; // 重复日程实例ID
String[] projection = new String[] { Instances._ID };
String selection = Instances.EVENT_ID + " = ? AND " + Instances.HAS_ALARM + " = 1";
String[] selectionArgs = new String[] { Long.toString(eventId) };
Cursor cursor = getContentResolver().query(Instances.CONTENT_URI, projection, selection, selectionArgs, null);
if (cursor.moveToFirst()) {
long instanceId = cursor.getLong(cursor.getColumnIndex(Instances._ID));
// 在这里使用instanceId查询该实例的所有信息
}
cursor.close();
```
然后,您可以使用以下代码查询该重复实例的所有信息:
```
String[] projection = new String[] {
Instances._ID,
Instances.BEGIN,
Instances.END,
Instances.EVENT_ID,
Instances.RDATE,
Instances.RRULE
};
String selection = Instances._ID + " = ?";
String[] selectionArgs = new String[] { Long.toString(instanceId) };
Cursor cursor = getContentResolver().query(Instances.CONTENT_URI, projection, selection, selectionArgs, null);
if (cursor.moveToFirst()) {
long id = cursor.getLong(cursor.getColumnIndex(Instances._ID));
long begin = cursor.getLong(cursor.getColumnIndex(Instances.BEGIN));
long end = cursor.getLong(cursor.getColumnIndex(Instances.END));
long eventId = cursor.getLong(cursor.getColumnIndex(Instances.EVENT_ID));
String rdate = cursor.getString(cursor.getColumnIndex(Instances.RDATE));
String rrule = cursor.getString(cursor.getColumnIndex(Instances.RRULE));
// 在这里根据重复规则计算所有重复实例的日期
}
cursor.close();
```
最后,您可以使用以下代码计算所有重复实例的日期:
```
TimeZone timeZone = TimeZone.getDefault();
Calendar beginCalendar = Calendar.getInstance(timeZone);
beginCalendar.setTimeInMillis(begin);
Calendar endCalendar = Calendar.getInstance(timeZone);
endCalendar.setTimeInMillis(end);
RecurrenceSet recurrenceSet = new RecurrenceSet(rrule, begin, timeZone);
RecurrenceProcessor processor = new RecurrenceProcessor(recurrenceSet);
List<Long> dates = new ArrayList<>();
for (long date : processor.getDates()) {
if (date >= begin && date <= end) {
dates.add(date);
}
}
if (rdate != null) {
for (String date : rdate.split(",")) {
try {
long timestamp = DateUtils.parseDate(date.trim()).getTime();
if (timestamp >= begin && timestamp <= end) {
dates.add(timestamp);
}
} catch (ParseException e) {
e.printStackTrace();
}
}
}
List<EventInstance> instances = new ArrayList<>();
for (long date : dates) {
EventInstance instance = new EventInstance(eventId, beginCalendar, endCalendar, date, timeZone);
instances.add(instance);
}
```
这个示例代码可以帮助您了解如何根据重复日程实例ID获取所有重复实例。请注意,这只是一个简单的示例代码,实际情况可能更加复杂,具体实现方式可能因应用程序的需求而异。