code: private static void attachToContent(Activity activity, SwipeBack swipeBack) {
  		/**
  		 * Do not call mActivity#setContentView.
  		 * E.g. if using with a ListActivity, Activity#setContentView is overridden and dispatched to
  		 * SwipeBack#setContentView, which then again would call Activity#setContentView.
  		 */
  		ViewGroup content = (ViewGroup) activity
  				.findViewById(android.R.id.content);
  		content.removeAllViews();
  		content.addView(swipeBack, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
  	}
docs: Attaches the swipe back to the content view.