Android ViewPager's onPageScrollStateChanged never gets called

Question

I have extended the ViewPager class and implemented onPageChangeListener. I use this ViewPager in conjunction with a CirclePageIndicator inside a SherlockFragment. The ViewPager

Answer 1

When you use PageIndicator in conjunction with the Viewpager then the onPageChangeListener of the ViewPager is not called. I don't know the reason for this but this happened when I was using both. May be cause the page indicator consumes the page change event. Instead you should set a page change listener to the PageIndicator and it will be called when the page changes. Here is how you can do this:

indicator.setOnPageChangeListener(new OnPageChangeListener() {

        @Override
        public void onPageSelected (int page)
        {
            //page changed
        }

        @Override
        public void onPageScrolled (int arg0, float arg1, int arg2)
        {
        }

        @Override
        public void onPageScrollStateChanged (int arg0)
        {
        }
    });

I hope this will help. Feel free to discuss.

Answer 2

setOnPageChangeListener is deprecated. use addOnPageChangeListener

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });