Android AlarmManager

class AlarmReceiver : BroadcastReceiver() {

    companion object {
        const val TAG = "AlarmReceiver"
        const val NOTIFICATION_ID = 0
        const val PRIMARY_CHANNEL_ID = "primary_notification_channel"
    }

    lateinit var notificationManager: NotificationManager

    override fun onReceive(context: Context, intent: Intent) {
        Log.d(TAG, "Received intent : $intent")
        notificationManager = context.getSystemService(
            Context.NOTIFICATION_SERVICE) as NotificationManager

        createNotificationChannel()
        deliverNotification(context)
    }

    private fun deliverNotification(context: Context) {
        val contentIntent = Intent(context, MainActivity::class.java)
        val contentPendingIntent = PendingIntent.getActivity(
            context,
            NOTIFICATION_ID,
            contentIntent,
            PendingIntent.FLAG_UPDATE_CURRENT
        )
        val builder =
            NotificationCompat.Builder(context, PRIMARY_CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_launcher_foreground)
                .setContentTitle("Alert")
                .setContentText("This is repeating alarm")
                .setContentIntent(contentPendingIntent)
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setAutoCancel(true)
                .setDefaults(NotificationCompat.DEFAULT_ALL)

        notificationManager.notify(NOTIFICATION_ID, builder.build())
    }

    fun createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val notificationChannel = NotificationChannel(
                PRIMARY_CHANNEL_ID,
                "Stand up notification",
                NotificationManager.IMPORTANCE_HIGH
            )
            notificationChannel.enableLights(true)
            notificationChannel.lightColor = Color.RED
            notificationChannel.enableVibration(true)
            notificationChannel.description = "AlarmManager Tests"
            notificationManager.createNotificationChannel(
                notificationChannel)
        }
    }
}

 

class MainActivity : AppCompatActivity() {

    private val TAG = MainActivity::class.java.simpleName

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val start = findViewById<Button>(R.id.start)
        start.setOnClickListener {

            Log.d(TAG, "start")

            val alarmManager = getSystemService(ALARM_SERVICE) as AlarmManager

            val intent = Intent(this, AlarmReceiver::class.java)  // 1
            val pendingIntent = PendingIntent.getBroadcast(     // 2
                this, AlarmReceiver.NOTIFICATION_ID, intent,
                PendingIntent.FLAG_UPDATE_CURRENT)

                val repeatInterval: Long = AlarmManager.INTERVAL_FIFTEEN_MINUTES
                val triggerTime = (SystemClock.elapsedRealtime()    // 1
                        + repeatInterval)
                alarmManager.setInexactRepeating(     // 2
                    AlarmManager.ELAPSED_REALTIME_WAKEUP,
                    triggerTime, repeatInterval,
                    pendingIntent)

                Toast.makeText(this, "Toast", Toast.LENGTH_SHORT).show()

        }

        val end = findViewById<Button>(R.id.end)
        end.setOnClickListener {

        }

    }

}

 

 

 

 

 

 

 

- 참조

 

https://codechacha.com/ko/android-alarmmanager/

Android - AlarmManager로 알람을 등록하는 방법

 

https://developer.android.com/training/scheduling/alarms?hl=ko 

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