警报管理器未触发

我是新手，所以我有点迷路。

我已经构建了一个通知，并将其作为未决的Intent传递给警报管理器，但是，与其等待间隔触发警报并显示通知，不如立即显示该通知。我做错了什么，导致警报设置不正确？

public class NotificationController{

Context context;

public void createNotification(Context context){

    this.context = context;
    Notification notification = getNotification();

    //creates notification
    Intent intent = new Intent(context, NotificationReceiver.class);
    intent.putExtra(NotificationReceiver.NOTIFICATION_ID, 1);
    intent.putExtra(NotificationReceiver.NOTIFICATION, notification);
    PendingIntent pIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

    //schedules notification to be fired.
    AlarmManager  alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, 10000 , pIntent);

}


private Notification getNotification(){

    Intent intent = new Intent(context, MainActivity.class);
    PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent, 0);

    Notification.Builder builder = new Notification.Builder(context)
            .setContentTitle("Reminder")
            .setContentText("Car service due in 2 weeks")
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentIntent(pIntent);
    return builder.build();
}
}

我的接收者

public class NotificationReceiver extends BroadcastReceiver {

public static String NOTIFICATION_ID = "notification-id";
public static String NOTIFICATION = "notification";

public void onReceive(Context context, Intent intent) {

    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    Notification notification = intent.getParcelableExtra(NOTIFICATION);
    int id = intent.getIntExtra(NOTIFICATION_ID, 0);

    notification.flags |= Notification.FLAG_AUTO_CANCEL;
    notificationManager.notify(id, notification);

}
}

我也已<receiver android:name=".NotificationReceiver" >在AndroidManifest中注册。