The Android tab indicator does not move when sliding, but moves when selecting

I have a main activity with three tabs that don't move when I slide the tabbed indicator, but when I select a tab, the layout changes, the indicator moves, and the layout changes

resolvent:

Ensure that you have attached onpagechangelistener to viewpager

mViewPager.setOnPagechangelistener(
            new ViewPager.SimpleOnPagechangelistener() {
                @Override
                public void onPageSelected(int position) {
                    mTabs.getTabAt(position).select();
                }
            });