Android-ViewPager-OnPageChangeListener

mViewPager.setOnPageChangeListener(new OnPageChangeListerer () {

@Override
public void onPageSelected(int position) {
mPagerList.get(position).initData();
}

@Override
public void onPageScrolled(int position, float positionOffset, float positionOffsetPixels){

}

@Override
public void onPageScrolledStateChanged(int state) {

}

}