tabindicator is not sliding from one to another tab in tablayout when I swipe between fragments. Highlighting of font is also not changing

Question

public class LoginRegister extends AppCompatActivity implements SignUpFragment.OnFragmentInteractionListener ,SignInFragment.OnFragmentInteractionListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login_register);
    final TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout_signup);
    tabLayout.addTab(tabLayout.newTab().setText("Sign Up"));
    tabLayout.addTab(tabLayout.newTab().setText("Sign in"));
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);        
    final ViewPager pager =(ViewPager) findViewById(R.id.loginpager);
    final SigninPagerAdapter adapter = new SigninPagerAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
    pager.setAdapter(adapter);
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            pager.setCurrentItem(tab.getPosition());
        }
        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
}
        @Override
        public void onTabReselected(TabLayout.Tab tab) {
        }
    });

when I slide through fragments, the highlights of the tab does not changes, But it works fine when I touch the tabs.When I touch them, the tab indicator slides well from left to right and font color of tabs also looks highlighted. I think Problem is in this piece of code

pager.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) {

        }
    });

}


@Override
public void onFragmentInteraction(Uri uri) {

}
}

What should I do to Highlight current tab...

Answer 1

I found my solution.

tabLayout.setupWithViewPager(pager);

this method sets everything easily.

Answer 2

Just an additional note.

Best thing to do is call tabLayout.setupWithViewPager(viewPager) last.

At least, don't call viewPager.clearOnPageChangeListeners() or viewPager.setOnPageChangeListener() right after you called tabLayout.setupWithViewPager(viewPager) because that will remove the listener that TabLayout uses when the ViewPager is scrolled.