It not worded when I set a onPageChangeListener,and not work with viewpager.

what wrong with the problem?
`mSubaeraTablayout.setTitles(array);
// mSubaeraTablayout.setStripColor(Color.RED);
mSubaeraTablayout.setTabIndex(curZoneChannelPos, true);

mSubaeraTablayout.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//not worked!
ToastUtil.showShortToast("position"+position);

}

@Override public void onPageSelected(int position) {
ToastUtil.showShortToast("position"+position);
}

@Override public void onPageScrollStateChanged(int state) {
ToastUtil.showShortToast("position"+state);

}
});`