Unable to Retrieve Reminder Details from Device Calendar

问题

I am able to retrieve all the events from the device calendar from the below code,

 @SuppressLint("MissingPermission")
    private fun getAccountCalendarEvents(selectedEmail: String) {
        var count = 0
        val projectionArray =
            arrayOf(
                CalendarContract.Calendars._ID,
                CalendarContract.Events.TITLE,
                CalendarContract.Events.DESCRIPTION,
                CalendarContract.Events.DTSTART,
                CalendarContract.Events.DTEND,
                CalendarContract.Events.ALL_DAY,
                CalendarContract.Events.EVENT_LOCATION,
                CalendarContract.Attendees.ORGANIZER,
                CalendarContract.Events.EVENT_TIMEZONE,
                CalendarContract.Events.ACCOUNT_TYPE,
                CalendarContract.Calendars.ACCOUNT_NAME
            )

        val startTime = Calendar.getInstance()
        startTime.set(Calendar.HOUR_OF_DAY, 0)
        startTime.set(Calendar.MINUTE, 0)
        startTime.set(Calendar.SECOND, 0)
        startTime.add(Calendar.YEAR, -2)

        val endTime = Calendar.getInstance()
        endTime.add(Calendar.YEAR, 2)

        val selection =
            "(( " + CalendarContract.Events.DTSTART + " >= " + startTime.timeInMillis + " ) AND ( " + CalendarContract.Events.DTEND + " <= " + endTime.timeInMillis + " ) AND ( deleted != 1 )  AND (account_name = '" + selectedEmail + "'))"

        val cursor = contentResolver.query(
            CalendarContract.Events.CONTENT_URI,
            projectionArray,
            selection,
            null,
            null
        )

        if (cursor != null && cursor.count > 0 && cursor.moveToFirst()) {
            do {
                var calendarString = ""

                val calendarId = "Id: " + cursor.getInt(0)
                val title = "Title: " + cursor.getString(1)
                val description = "Description: " + cursor.getString(2)
                val startDate = "Start Date: " + cursor.getString(3)
                val endDate = "End Date: " + cursor.getString(4)
                val allDay = "All Day: " + cursor.getString(5)
                val location = "Location: " + cursor.getString(6)
                val organizer = "Organizer: " + cursor.getString(7)
                val timeZone = "Timezone: " + cursor.getString(8)
                val accountType = "Account Type: " + cursor.getString(9)
                val accountName = "Account Name: " + cursor.getString(10)

                calendarString =
                    calendarId + "\n" + title + "\n" + description + "\n" + startDate + "\n" + endDate + "\n" + allDay + "\n" + location + "\n" + organizer + "\n" + timeZone + "\n" + accountType + "\n" + accountName

                result = if (result.isEmpty()) {
                    calendarString
                } else {
                    result + "\n\n\n" + calendarString
                }
                count++
            } while (cursor.moveToNext())
        }
//        txtResults.text = result
        Log.e("DCal", "" + count)
        getEventsReminders(selectedEmail)

    }

This works absolutely fine and perfect.Whereas, when I'm trying to fetch the Reminders from the device with the following code,

 @SuppressLint("MissingPermission")
    private fun getAccountCalendarReminders(selectedEmail: String) {
        var count = 0
        val projectionArray =
            arrayOf(
                CalendarContract.Reminders.EVENT_ID,
                CalendarContract.Reminders.METHOD,
                CalendarContract.Reminders.MINUTES
            )

        val startTime = Calendar.getInstance()
        startTime.add(Calendar.YEAR, -2)

        val endTime = Calendar.getInstance()
        endTime.add(Calendar.YEAR, 2)

//        val selection =
//            "((account_name = '$selectedEmail'))"


        val cursor = contentResolver.query(
            CalendarContract.Reminders.CONTENT_URI,
            projectionArray,
            null,
            null,
            null
        )


        if (cursor != null && cursor.count > 0 && cursor.moveToFirst()) {
            do {
                var calendarString = ""

                val calendarId = "Id: " + cursor.getInt(0)
                val title = "Method: " + cursor.getString(1)
                val description = "Minutes: " + cursor.getString(2)
//                val startDate = "Title: " + cursor.getString(3)
//                val endDate = "End Date: " + cursor.getString(4)
//                val allDay = "All Day: " + cursor.getString(5)
//                val location = "Location: " + cursor.getString(6)
//                val organizer = "Organizer: " + cursor.getString(7)
//                val timeZone = "Timezone: " + cursor.getString(8)
//                val accountType = "Account Type: " + cursor.getString(9)
//                val accountName = "Account Name: " + cursor.getString(10)
                calendarString =
                    calendarId + "\n" + title + "\n" + description


                result = if (result.isEmpty()) {
                    calendarString
                } else {
                    result + "\n\n\n" + calendarString
                }
                count++
            } while (cursor.moveToNext())
        }

        Log.e("DRem", "" + count)
        txtResults.text = result

    }

And the output of this Reminders are just,

Could anyone please help me in getting the Reminders Information completely like, 1. Reminder Name, 2. Start Date, 3. Location, etc. the same fields which Events do have.

Note: I have gone through this library as well,

https://github.com/EverythingMe/easy-content-providers

This library does the same. It doesn't list the reminders from the device calendar.

Code Snippet from the above Lib:

val provider = CalendarProvider(this)
val events = provider.getEvents(id.toLong()).list as ArrayList<Event>
val reminders = provider.getReminders(id.toLong()).list as ArrayList<Event>

来源：https://stackoverflow.com/questions/60812072/unable-to-retrieve-reminder-details-from-device-calendar