Notification not making sound or vibration?

Question

I am making a program and I want the app to make a notification. When the notification goes off then only the ticker text is displayed. No sound or vibration or light is accompanied with it.

Here is an example of my code:

int icon = R.drawable.icon;  
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);

Context context = getApplicationContext();      

CharSequence contentTitle = "My notification";  
CharSequence contentText = "Countdown Complete!";

Intent intent = new Intent();
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
Notification notification = new Notification(icon, myCountDown.getName() + " is completed!", System.currentTimeMillis());

long[] vibrate = {0,100,200,300};
notification.vibrate = vibrate;
notification.defaults |= Notification.DEFAULT_LIGHTS;
notification.defaults |= Notification.DEFAULT_SOUND;
notification.setLatestEventInfo(context, contentTitle, contentText, pendingIntent);
notificationManager.notify(myCountDown.getId(), notification);

Answer 1

To add notification light you need to add this(notice the .flags, not .defaults):

notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.ledARGB=0xffffffff; //color, in this case, white
notification.ledOnMS=1000; //light on in milliseconds
notification.ledOffMS=4000; //light off in milliseconds

For default sound:

notification.defaults |= Notification.DEFAULT_SOUND;

For default vibration pattern:

notification.defaults |= Notification.DEFAULT_VIBRATE;

For vibration, as Dean Thomas mentioned, you'll need a permission <uses-permission android:name="android.permission.VIBRATE"/>

Answer 2

To make the LED work, you need to tell it what to do.

   notification.ledOnMS = 1000; //Be on for a second
   notification.ledOffMS = 1000; //Be off for a second
   notification.ledARGB = Color.GREEN; //What colour should the LED be?

To make the vibrate work, you need permission added to your Manifest

<uses-permission android:name="android.permission.VIBRATE"/>