非法StateException错误

Question

我最近从Java迁移到Kotlin，并将我的应用程序代码转换为kotlin代码并发布了更改。但现在一些用户报告应用程序正在强行停止。但是我和经过测试的设备并没有面临这个问题。当我检查崩溃页面时。它显示了这个：

这是带有第1018行的DatabaseHelper类代码

fun getNotes(sqlCommand: String): MutableList<Note> {
    val result = ArrayList<Note>()
    val db = this.readableDatabase
    Log.e(LOG, sqlCommand)
    val cursor = db.rawQuery(sqlCommand, null)
    try {
        if (cursor!!.moveToFirst()) {
            do {
                val note = Note()
                note.id = cursor.getLong(cursor.getColumnIndex(KEY_ID))
                note.title = DataEncryption.encryptDecrypt(cursor.getString(cursor.getColumnIndex(KEY_TITLE)))
                note.content = DataEncryption.encryptDecrypt(cursor.getString(cursor.getColumnIndex(KEY_CONTENT)))
                note.updatedAt = Date(cursor.getLong(cursor.getColumnIndex(KEY_UPDATED_AT)))
                note.color = cursor.getInt(cursor.getColumnIndex(KEY_COLOR))
                note.favourite = cursor.getInt(cursor.getColumnIndex(KEY_FAVOURITE))
                if (cursor.isNull(cursor.getInt(cursor.getColumnIndex(KEY_LOCKSTATUS)))) {
                    note.lock_status = 0
                } else {
                    note.lock_status = cursor.getInt(cursor.getColumnIndex(KEY_LOCKSTATUS))
                }
                note.reminderDate = cursor.getString(cursor.getColumnIndex(KEY_REMINDER_DATE))
                note.reminderTime = cursor.getString(cursor.getColumnIndex(KEY_REMINDER_TIME))
                if (cursor.isNull(cursor.getInt(cursor.getColumnIndex(KEY_REMINDER_STATUS)))) {
                    note.reminderStatus = 0
                } else {
                    note.reminderStatus = cursor.getInt(cursor.getColumnIndex(KEY_REMINDER_STATUS))
                }
                note.noteCategoryTitle = cursor.getString(cursor.getColumnIndex(KEY_CATEGORY_NOTE_TITLE))
                note.noteCategoryStatus = cursor.getInt(cursor.getColumnIndex(KEY_CATEGORY_NOTE_STATUS))
                note.checklist = cursor.getInt(cursor.getColumnIndex(KEY_CHECKLIST))
                if (cursor.isNull(cursor.getInt(cursor.getColumnIndex(KEY_ALARM_REPEAT_STATUS)))) {
                    note.alarmRepeatStatus = 0
                } else {
                    note.alarmRepeatStatus = cursor.getInt(cursor.getColumnIndex(KEY_ALARM_REPEAT_STATUS))
                }
                result.add(note)
            } while (cursor.moveToNext())
        }
    } finally {
        cursor?.close()
    }
    return result
}

有人请帮我解决一下。非常感谢帮助。