nav.java

	private void openIfNotHere(Class<? extends Activity> targetClass) {
		if (!getClass().isAssignableFrom(targetClass)) {
			/*
			 * When clicking a menu item we follow Google's best practices as defined here:
			 * https://developer.android.com/design/patterns/navigation.html
			 * and
			 * https://developer.android.com/guide/components/tasks-and-back-stack.html
			 * 
			 * The result is that when you click to
			 * - people and subsequently
			 * - shops
			 * - the back button
			 * You end up on the home activity instead of the people activity
			 */
			Intent intent = new Intent(this, targetClass);
			// Disable animation when navigating forward
			intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
			// Create a new task stack with just home and the menu item we're navigating to
			TaskStackBuilder task = TaskStackBuilder.create(this);
			if (targetClass != FashiolistaActivity.class) {
				Intent homeIntent = new Intent(this, FashiolistaActivity.class);
				homeIntent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
				task.addNextIntent(homeIntent);
			}
			task.addNextIntent(intent)
				.startActivities();
			// Disable animation when navigating home
			overridePendingTransition(0, 0);
		}
	}