Animate Header

Simply listen to the ViewPager Page Change and modify the header's color and image

//it's a sample ViewPagerAdapter
mViewPager.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {

            int oldPosition = -1;

            @Override
            public Fragment getItem(int position) {
                return RecyclerViewFragment.newInstance();
            }

            @Override
            public int getCount() {
                return 4;
            }

            @Override
            public CharSequence getPageTitle(int position) {
                return "Tab "+position;
            }

            //called when the current page has changed
            @Override
            public void setPrimaryItem(ViewGroup container, int position, Object object) {
                super.setPrimaryItem(container, position, object);

                //only if position changed
                if(position == oldPosition)
                    return;
                oldPosition = position;

                int color = 0;
                String imageUrl = "";
                switch (position){
                    case 0:
                        imageUrl = "http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2014/06/wallpaper_51.jpg";
                        color = getResources().getColor(R.color.blue);
                        break;
                    case 1:
                        imageUrl = "https://fs01.androidpit.info/a/63/0e/android-l-wallpapers-630ea6-h900.jpg";
                        color = getResources().getColor(R.color.green);
                        break;
                    case 2:
                        imageUrl = "http://www.droid-life.com/wp-content/uploads/2014/10/lollipop-wallpapers10.jpg";
                        color = getResources().getColor(R.color.cyan);
                        break;
                    case 3:
                        imageUrl = "http://www.tothemobile.com/wp-content/uploads/2014/07/original.jpg";
                        color = getResources().getColor(R.color.red);
                        break;
                }

                final int fadeDuration = 400;

                //change header's color and image
                mViewPager.setImageUrl(imageUrl,fadeDuration);
                mViewPager.setColor(color,fadeDuration);

            }

        });