Create a wake-up alarm that is triggered 10 seconds later

Create an alarm that is only activated once. You can use the set method to specify an alarm type, trigger time, and pending intent to be activated.

Four Alarm types:

● Rtc_wakeup: Wake up the device at a specified time and activate the pending intent

● RTC: activates pending at a specified time point, but does not wake up the device.

● Elapsed_realtime: the time after which the device starts to activate pending intent, but does not wake up the device

● Elapsed_realtime_wakeup: Wake up the device and activate pending intent after the device is started and after a specified time

 

   1: private void setAlarm() {

   2:     /**

3: * listing 9-16: Create a wake-up alarm, which is triggered 10 seconds later.

   4:      */

5: // obtain an alarm manager reference

   6:     AlarmManager alarmManager = 

   7:      (AlarmManager)getSystemService(Context.ALARM_SERVICE);

   8:   

9: // if the device is in sleep state, set alarm to wake up the device

  10:     int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;

  11:   

12: // trigger the device after 10 seconds

  13:     long timeOrLengthofWait = 10000;

  14:   

15: // create a pending intent for broadcast and Operation

  16:     String ALARM_ACTION = "ALARM_ACTION";

  17:     Intent intentToFire = new Intent(ALARM_ACTION);

  18:     PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0,

  19:       intentToFire, 0);

  20:   

21: // set alarm set the alarm

  22:     alarmManager.set(alarmType, timeOrLengthofWait, alarmIntent);