mPager = (WrapContentHeightViewPager) findViewById(R.id.pager);

        mPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            public void onPageScrollStateChanged(int state) {}
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}

            public void onPageSelected(int position) {
                // Check if this is the page you want.
                currentFav = position;
                Log.i("currentFav pos", currentFav+"");
            }
        });