Set the custom ad client factory

Add the following code:

MediaPlayer mediaPlayer = DefaultMediaPlayer.create(getActivity().getApplicationContext());
// Use custom ad client factory.
mediaPlayer.registerAdClientFactory(	
	new AdClientFactory() {
		public AdProvider createAdProvider(MediaPlayerItem item) {
			// Use the Auditude ad provider.
			return new AuditudeAdProvider();
		}

		public PlacementOpportunityDetector createOpportunityDetector(MediaPlayerItem item) {
			// Use the custom placement opportunity.
			long initialTime = _mediaPlayer != null ? _mediaPlayer.getCurrentTime() : -1;
			return new CustomPlacementOpportunityDetector(item, initialTime);
		}
	}
);