ActionManager.getInstance().getAction(Constants.ACTION_NEXT) .setEnabled(true);
	public ActivityPresentationState (ActivityScheduler activityScheduler,			Activity activity)	{		super(activityScheduler, activity);		// on affiche la presentation de l'activit?		this.activityScheduler.presentActivityAndProduct();				// TODO a supprimer		// test la presentation des produits a creer		// this.activityScheduler.presentProducts(this.activity.getOutputProducts());		// this.activityScheduler.checkBeforeEnd();						// on affiche le bouton next		ActionManager.getInstance().getAction(Constants.ACTION_NEXT)				.setEnabled(true);		// on affiche le bouton terminate		ActionManager.getInstance().getAction(Constants.ACTION_TERMINATE)				.setEnabled(true);		if (this.activity.hasInputProducts())		{			// on active le bouton previous			ActionManager.getInstance().getAction(Constants.ACTION_PREVIOUS)					.setEnabled(true);		}		else		{			// on grise le bouton previous			ActionManager.getInstance().getAction(Constants.ACTION_PREVIOUS)					.setEnabled(false);		}	}