删除日历条目

Question

我编写了用于删除android日历中所有条目的简单代码，但并未删除任何内容。

源代码：

public void DeleteEvent(View view){

            int iNumRowsDeleted = 0;
            Uri eventsUri = Uri.parse("content://com.android.calendar/events");
            Cursor cur = getContentResolver().query(eventsUri, null, null, null, null);

            while (cur.moveToNext()){

                long id = cur.getLong(cur.getColumnIndex("_id"));
                Log.d(TAG, "ID: " + id);
                Uri eventUri = ContentUris.withAppendedId(eventsUri, id);
                iNumRowsDeleted = getContentResolver().delete(eventUri, null, null);
            }
        }

Answer 1

private void deleteEvent(ContentResolver resolver, Uri eventsUri, int calendarId) {
    Cursor cursor;
    if (android.os.Build.VERSION.SDK_INT <= 7) { //up-to Android 2.1 
        cursor = resolver.query(eventsUri, new String[]{ "_id" }, "Calendars._id=" + calendarId, null, null);
    } else { //8 is Android 2.2 (Froyo) (http://developer.android.com/reference/android/os/Build.VERSION_CODES.html)
        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();
}

我这样称呼它：

Uri eventsUri;
int osVersion = android.os.Build.VERSION.SDK_INT;
if (osVersion <= 7) { //up-to Android 2.1 
    eventsUri = Uri.parse("content://calendar/events");
} else { //8 is Android 2.2 (Froyo) (http://developer.android.com/reference/android/os/Build.VERSION_CODES.html)
    eventsUri = Uri.parse("content://com.android.calendar/events");
}
ContentResolver resolver = this.getContentResolver();
deleteEvent(resolver, eventsUri, calendarId);