title: Meaning of AlarmManager parameters
body: <p>To set an alarm, I use</p>
  
  <pre><code>AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
          alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, futureTimeInMillis, pendingIntent);
  </code></pre>
  
  <p>I don't understand the relation between <code>AlarmManager.ELAPSED_REALTIME_WAKEUP</code> and <code>futureTimeInMillis</code>. For example, say I want an alarm to go off 15 minutes from now. Then what is the value of <code>futureTimeInMillis</code>? is it</p>
  
  <pre><code>futureTimeInMillis = NOW+MIN_15;
  </code></pre>
  
  <p>or is it</p>
  
  <pre><code>    futureTimeInMillis = MIN_15;
  </code></pre>