Question

有2种方法：

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.
*/

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)

一切都在api 23上运行良好，但在api 24上，警报不会取消。 intent.action有问题吗？我想念什么？

Answer 1

好吧，我通过添加intent.action来解决此问题：

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)

无法使用24 API上的AlarmManager.cancel（）取消警报

1 个答案: