Can't cancel alarm with AlarmManager.cancel() on 24 API

Question

Have 2 methods:

1. addAlarm()

val myIntent = Intent(context, AlarmReceiver::class.java)
if (SDK_INT > Build.VERSION_CODES.M) {
    myIntent.action = "ADD_ALARM"
} else {
    myIntent.putExtra("alarm", alarm)
}
val pendingIntent = PendingIntent.getBroadcast(context, 1, myIntent, PendingIntent.FLAG_UPDATE_CURRENT)
val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
if (SDK_INT < Build.VERSION_CODES.M)
    alarmManager.setExact(AlarmManager.RTC_WAKEUP, calendar.timeInMillis, pendingIntent)
else
    alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, calendar.timeInMillis, pendingIntent)
/*
    if I try to cancel alarm after creating like this:

    val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    alarmManager.cancel(pendingIntent)

    it would work and alarm would be canceled. Seems like problem is 
    in pendingIntent.
*/

2. deleteAlarm()

val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
var myIntent = Intent(context, AlarmReceiver::class.java)
//with flag FLAG_NO_CREATE return null
val pendingIntent = PendingIntent.getBroadcast(context, 1, myIntent, PendingIntent.FLAG_UPDATE_CURRENT)
alarmManager.cancel(pendingIntent)

Everything works great on api 23, but on api 24 alarm do not canceling. Is it problem with intent.action? What did i miss?

Answer 1

Ok, I solved it with adding intent.action like this:

val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
var myIntent = Intent(context, AlarmReceiver::class.java)
if (SDK_INT > Build.VERSION_CODES.M) {
    myIntent.action = "ADD_ALARM"
}
val pendingIntent = PendingIntent.getBroadcast(context, 1, myIntent, PendingIntent.FLAG_UPDATE_CURRENT)
alarmManager.cancel(pendingIntent)