Merge "fix NPE when fragment container is null" into oc-dev

                    } else {

                        final ViewGroup container = fragment.mContainer;

                        final View animatingView = fragment.mView;

                        if (container != null) {

                            container.startViewTransition(animatingView);

                        }

                        // Delay the actual hide operation until the animation finishes, otherwise

                        // the fragment will just immediately disappear

                        anim.addListener(new AnimatorListenerAdapter() {

                            @Override

                            public void onAnimationEnd(Animator animation) {

                                if (container != null) {

                                    container.endViewTransition(animatingView);

                                }

                                animation.removeListener(this);

                                animatingView.setVisibility(View.GONE);

                            }