android 根据重复日程实例ID获取所有重复实例
时间: 2023-09-03 16:07:42 浏览: 56
要根据重复日程实例ID获取所有重复实例,您可以通过以下步骤实现:
1. 获取重复日程实例ID。
2. 使用该ID在数据库中查询该实例的所有信息,包括起始时间、结束时间、重复规则等。
3. 根据重复规则计算出所有重复实例的日期。
4. 将每个重复实例的日期与起始时间和结束时间组合,生成完整的重复实例。
5. 将所有重复实例返回给用户。
在实现这个过程时,您可以使用Android提供的日历API来查询和计算重复实例。具体实现细节可以参考Android官方文档和示例代码。
相关问题
android 根据重复日程实例ID获取所有重复实例 demo
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。
获取Android 系统日程的重复日程的实例 demo
以下是一个获取Android系统日历中重复日程的实例demo:
```java
public class MainActivity extends AppCompatActivity {
private static final String[] EVENT_PROJECTION = new String[]{
CalendarContract.Events._ID,
CalendarContract.Events.TITLE,
CalendarContract.Events.DESCRIPTION,
CalendarContract.Events.EVENT_LOCATION,
CalendarContract.Events.DTSTART,
CalendarContract.Events.DTEND,
CalendarContract.Events.RRULE
};
private static final int PROJECTION_ID_INDEX = 0;
private static final int PROJECTION_TITLE_INDEX = 1;
private static final int PROJECTION_DESCRIPTION_INDEX = 2;
private static final int PROJECTION_LOCATION_INDEX = 3;
private static final int PROJECTION_DTSTART_INDEX = 4;
private static final int PROJECTION_DTEND_INDEX = 5;
private static final int PROJECTION_RRULE_INDEX = 6;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Cursor cur = null;
ContentResolver cr = getContentResolver();
// 查询条件
String selection = CalendarContract.Events.DTSTART + ">=? AND " + CalendarContract.Events.DTEND + "<=?";
String[] selectionArgs = new String[]{String.valueOf(System.currentTimeMillis()), String.valueOf(System.currentTimeMillis() + DateUtils.YEAR_IN_MILLIS)};
// 查询系统日历表
cur = cr.query(CalendarContract.Events.CONTENT_URI, EVENT_PROJECTION, selection, selectionArgs, CalendarContract.Events.DTSTART + " ASC");
if (cur != null && cur.getCount() > 0) {
while (cur.moveToNext()) {
long eventID = cur.getLong(PROJECTION_ID_INDEX);
String title = cur.getString(PROJECTION_TITLE_INDEX);
String description = cur.getString(PROJECTION_DESCRIPTION_INDEX);
String location = cur.getString(PROJECTION_LOCATION_INDEX);
long dtstart = cur.getLong(PROJECTION_DTSTART_INDEX);
long dtend = cur.getLong(PROJECTION_DTEND_INDEX);
String rrule = cur.getString(PROJECTION_RRULE_INDEX);
// 判断是否是重复日程
if (!TextUtils.isEmpty(rrule)) {
// 获取重复日程的实例
Uri.Builder builder = CalendarContract.Instances.CONTENT_URI.buildUpon();
ContentUris.appendId(builder, dtstart);
ContentUris.appendId(builder, dtend);
Cursor curInstances = cr.query(builder.build(), EVENT_PROJECTION, null, null, null);
if (curInstances != null && curInstances.getCount() > 0) {
while (curInstances.moveToNext()) {
long instanceID = curInstances.getLong(PROJECTION_ID_INDEX);
String instanceTitle = curInstances.getString(PROJECTION_TITLE_INDEX);
String instanceDescription = curInstances.getString(PROJECTION_DESCRIPTION_INDEX);
String instanceLocation = curInstances.getString(PROJECTION_LOCATION_INDEX);
long instanceDtstart = curInstances.getLong(PROJECTION_DTSTART_INDEX);
long instanceDtend = curInstances.getLong(PROJECTION_DTEND_INDEX);
Log.d("MainActivity", "重复日程实例ID:" + instanceID);
Log.d("MainActivity", "重复日程实例标题:" + instanceTitle);
Log.d("MainActivity", "重复日程实例描述:" + instanceDescription);
Log.d("MainActivity", "重复日程实例地点:" + instanceLocation);
Log.d("MainActivity", "重复日程实例开始时间:" + new Date(instanceDtstart));
Log.d("MainActivity", "重复日程实例结束时间:" + new Date(instanceDtend));
}
}
if (curInstances != null) {
curInstances.close();
}
}
}
}
if (cur != null) {
cur.close();
}
}
}
```
这个示例使用了 `CalendarContract.Instances` 表来获取重复日程的实例。通过查询系统日历表,如果某个事件的 `RRULE` 不为空,则表示该事件是重复事件,然后通过该事件的开始结束时间来查询 `CalendarContract.Instances` 表,获取重复事件的实例。最后遍历实例列表,打印出每个实例的信息。
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