鸿蒙3.0系统读取不到手机日历问题

Question

鸿蒙3.0系统，读取手机日历数据报空指针

只发现鸿蒙3.0系统的手机出现这种问题，同手机鸿蒙2.0及其他安卓手机无此问题，可以读取到数据，有没有遇到同样问题的，或者有什么解决思路，感谢解答

问题相关代码

private static String CALENDER_EVENT_URL = "content://com.android.calendar/events";
String selection = "(( " + CalendarContract.Events.DTSTART + " >= "
                + startTime.getTimeInMillis() + " ) AND ( " + CalendarContract.Events.DTSTART
                + " <= "</span> + endTime.<span class="hljs-property">getTimeInMillis() + " )  )";
        Cursor cursor = MyApplication.getContext().getContentResolver().query(uri, null, selection, null, null);
while (cursor.moveToNext()) {
  // 读取数据
}

运行结果及报错内容

Attempt to invoke interface method 'boolean android.database.Cursor.moveToNext()' on a null object reference