I'm trying to schedule notifications using the AlarmManager but for whatever reason, the onReceive method on my receiver isn't firing.
Here's how I'm scheduling the alarm
val intent = Intent(this, ReminderReceiver::class.java)
val pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT)
val cal: Calendar = Calendar.getInstance()
cal.add(Calendar.SECOND, 5)
val amanager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
amanager.set(AlarmManager.RTC_WAKEUP, cal.timeInMillis, pendingIntent)
and here's the onReceive method
override fun onReceive(context: Context, intent: Intent) {
Toast.makeText(context,"notification", Toast.LENGTH_SHORT).show()
}
I tried manually sending a broadcast to see if it works and there's no problem there so the issue shouldn't be related to the manifest.
I'm running this on MIUI12 android 10
I see no issue with your logic if your problem still prevails, try the following as a workaround
val intent = Intent(this, ReminderReceiver::class.java)
val pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT)
// val cal: Calendar = Calendar.getInstance()
// cal.add(Calendar.SECOND, 5)
val triggerTime = SystemClock.elapsedRealtime() + 5_000 // five seconds from now
val amanager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
// amanager.set(AlarmManager.RTC_WAKEUP, cal.timeInMillis, pendingIntent)
AlarmManagerCompat.setExactAndAllowWhileIdle(
amanager,
AlarmManager.ELAPSED_REALTIME_WAKEUP,
triggerTime,
pendingIntent
)
Related
Hi I am implementing a alarm system in my app. I have an alarm manager that triggers a notification everyday in a certain time. It doesn't work as it intended the notification is not displayed at all. Please can anyone help me with these thank you.
my Alarm set code:
val calender = Calendar.getInstance()
calender[Calendar.HOUR_OF_DAY] = hour
calender[Calendar.MINUTE] = minute
calender[Calendar.SECOND] = 0
calender[Calendar.MILLISECOND] = 0
val pendingIntent = PendingIntent.getBroadcast(
requireContext(),
0,
intent,
PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
)
alarmManager.setInexactRepeating (
AlarmManager.RTC_WAKEUP,
calender.timeInMillis,
AlarmManager.INTERVAL_DAY,
pendingIntent
)
Broadcast receiver:
class AlarmReceiver : BroadcastReceiver() {
#RequiresApi(Build.VERSION_CODES.O)
override fun onReceive(context: Context?, p1: Intent?) {
val notificationManager =
context?.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val notificationCompatBuilder =
NotificationCompat.Builder(context, Constants.NOTIFICATION_CHANNEL_ID)
notificationCompatBuilder
.setContentTitle("Prescript")
.setContentText("Medicine time.")
.setSmallIcon(R.mipmap.ic_launcher).priority = NotificationCompat.PRIORITY_DEFAULT
notificationManager.notify(666, notificationCompatBuilder.build())
Log.d("TAG", "onReceive: $notificationCompatBuilder")
// Toast.makeText(context, "Alarm....", Toast.LENGTH_LONG).show();
}
}
How can I cancel an alarm set with setAlarmClock()?
val alarmReceiver = Intent(applicationContext, AlarmReceiver::class.java)
val alarmReceiverPi = PendingIntent.getBroadcast(applicationContext, 0, alarmReceiver, 0)
val alarmInfo = AlarmManager.AlarmClockInfo(time, alarmReceiverPi)
alarmManager.setAlarmClock(alarmInfo, alarmReceiverPi)
The id to used to locate the PendingIntent, following is my example:
fun setAlarm() {
val alarmPendingIntent = getAlarmPendingIntent(alarmId)
alarmManager.setExact(AlarmManager.RTC_WAKEUP, _timeLong.value, alarmPendingIntent)
showToast("Alarm has been set")
}
fun cancelAlarm() {
val alarmPendingIntent = getAlarmPendingIntent(alarmId)
alarmManager.cancel(alarmPendingIntent)
showToast("Alarm has bee canceled")
}
private fun getAlarmPendingIntent(id: Long): PendingIntent {
val intent = Intent(getApplication(), AlarmReceiver::class.java)
return PendingIntent.getBroadcast(getApplication(), id.toInt(), intent, PendingIntent.FLAG_UPDATE_CURRENT) //will override if same id
}
Helpful reading:
How to cancel alarm from AlarmManager
Have 2 methods:
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)
Everything works great on api 23, but on api 24 alarm do not canceling. Is it problem with intent.action? What did i miss?
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)
After I call schedulePing my alarm fires at set time period. With pingScheduled I can see if pending intent exists. However, if I cancel the alarm with cancelPing the pingScheduled still return true.
fun schedulePing(context: Context) {
val am = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
val intent = Intent(context, EventReceiver::class.java)
intent.action = EventReceiver.PING
val pendingIntent = PendingIntent.getBroadcast(context, PING, intent,
PendingIntent.FLAG_CANCEL_CURRENT)
val s = SettingsUtil.load(context)
am.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.elapsedRealtime() + s.periodPing, s.periodPing,
pendingIntent)
}
fun cancelPing(context: Context) {
if (pingScheduled(context).not()) return
val am = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
val intent = Intent(context, EventReceiver::class.java)
intent.action = EventReceiver.PING
val pendingIntent = PendingIntent.getBroadcast(context, PING, intent,
PendingIntent.FLAG_CANCEL_CURRENT)
am.cancel(pendingIntent)
}
fun pingScheduled(context: Context): Boolean {
val intent = Intent(context, EventReceiver::class.java)
intent.action = EventReceiver.PING
return PendingIntent.getBroadcast(context, PING,
intent, PendingIntent.FLAG_NO_CREATE) != null
}
am.cancel(pendingIntent) cancel alram, but does not discard the pending intent. So it is important to call
pendingIntent.cancel after am.cancel to be able to check correct presence with PendingIntent.FLAG_NO_CREATE
I'm trying to set an alarm with AlarmManager, but my BroadcastReceiver never gets called. Here is my snippet.
val receiver = object : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
//Never gets hit
}
}
context.registerReceiver(receiver, IntentFilter(LOCAL_NOTIFICATION))
val intent = Intent()
intent.action = LOCAL_NOTIFICATION
val alarmManager = context.getSystemService(ALARM_SERVICE) as? AlarmManager
val pendingIntent = PendingIntent.getService(context, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT)
val calendar = Calendar.getInstance()
calendar.add(Calendar.SECOND, 10)
alarmManager?.set(AlarmManager.RTC_WAKEUP, calendar.timeInMillis, pendingIntent)
I've tried registering a broadcast receiver in AndroidManifest.xml but nothing seems to be working.
I just noticed that I was calling getService() on PendingIntent instead of getBroadcast()
After changing that, it works perfectly!
In addition to the preferred answer, I set the class of the intent before it worked. See the example below:
val intent = Intent()
intent.action = LOCAL_NOTIFICATION
intent.setClass(context, MyBroadCastReceiver::class.java) //this line
before passing the intent to the pendintIntent.
hope it helps