title: Android Alarm Manager not firing at specified time
body: <p>I am trying to implement a notification to fire at a fixed point in the future, but I am having difficulties getting it working right. It fires immediately rather than at the specified time in the future. Below is my receiver class. I am calling SetAlarm from another class and passing a time interval, which is alertTime. Any thoughts? Thanks!!!</p>
  
  <pre><code>using System.Linq;
  using System.Text;
  using Android.App;
  using Android.Content;
  using Android.OS;
  using Android.Runtime;
  using Android.Views;
  using Android.Widget;
  using Android.Util;
  
  namespace Test_Android
  {
  [BroadcastReceiver]
  class NotificationAlertReceiver : BroadcastReceiver
  {
  
      public NotificationAlertReceiver()
      {
  
      }
  
      public override void OnReceive(Context context, Intent intent)
      {
          PowerManager pm = (PowerManager)context.GetSystemService(Context.PowerService);
          PowerManager.WakeLock w1 = pm.NewWakeLock (WakeLockFlags.Partial, "NotificationReceiver");
          w1.Acquire ();
          var nMgr = (NotificationManager)context.GetSystemService (Context.NotificationService);
          var notification = new Notification (Resource.Drawable.loadIcon, "Arrival");
          var pendingIntent = PendingIntent.GetActivity (context, 0, new Intent (context, typeof(MainActivity)), 0);
          notification.SetLatestEventInfo (context, "Arrival", "Arrival", pendingIntent);
          nMgr.Notify (0, notification);
          w1.Release ();
      }
  
      public void CancelAlarm(Context context){ 
          Intent intent = new Intent(context, this.Class);
          PendingIntent sender = PendingIntent.GetBroadcast (context, 0, intent, 0);
          AlarmManager alarmManager = (AlarmManager) context.GetSystemService (Context.AlarmService);
          alarmManager.Cancel (sender);
      }
  
      public void SetAlarm(Context context, int alertTime){
          long now = SystemClock.CurrentThreadTimeMillis();
          AlarmManager am = (AlarmManager) context.GetSystemService (Context.AlarmService);
          Intent intent = new Intent(context, this.Class);
          PendingIntent pi = PendingIntent.GetBroadcast (context, 0, intent, 0);
          am.Set (AlarmType.RtcWakeup, now + ((long)(alertTime*10000)), pi);
      }
  }
  }
  </code></pre>