Question

Is Fragment in ViewPager has a equivalent method like OnPageSelected() Or OnPageShow() ? I should do something when a specific page is showing?

---

I set hidden state of each Fragment in onPageScrolled() In page adapter, and I wonder why onHiddenChanged() not be called?

// In PageAdapter(extends FragmentPagerAdapter)

    public void onHiddenChanged(int arg0)
    {
        for (int i = 0; i < getCount(); i++) {
            if (i == arg0) {
                mAdapter.getItem(arg0).onHiddenChanged(true);
            } else {
                mAdapter.getItem(arg0).onHiddenChanged(false);
            }
        }
    }

// in PageActivity(extends FragmentActivity)

public void onPageSelected(int arg0)
{
    mAdapter.onHiddenChanged(arg0);
}

Answer 1

In Android for ViewPager there is a listener called ViewPager.OnPageChangeListener which has methods like

onPageScrollStateChanged(int state),

onPageScrolled(int position, float positionOffset, int positionOffsetPixels) , 

onPageSelected(int position)

If you want to do some specific task for the page you need to write ViewPager.OnPageChangeListener and override onPageSelected(int position) method.

for more details see here