ViewPager Title doesn't appear until I swipe it

Question

I am learning to use ViewPager and PagerTabStrip to implement navigation bar. I have implemented it, my problem is: every time I open the app fresh, the titles don\'t show,

Answer 1

Instead of using android.support.v4.view.PagerTabStrip , use android.support.design.widget.TabLayout for displaying tabs for viewPager. It is included in Google Design Support Library.

See this link for more information http://android-developers.blogspot.in/2015/05/android-design-support-library.html

Just few lines:

viewPager=(ViewPager)v.findViewById(R.id.viewPager);

ViewPagerAdapter adapter=new ViewPagerAdapter(this.getChildFragmentManager(),doctor);
adapter.setViewPagerFragmentListener(this);
viewPager.setAdapter(adapter);

tabLayout.setupWithViewPager(viewPager);  //Sync Tabs with viewPager
tabLayout.setTabsFromPagerAdapter(adapter);  //Setup tabs titles 

And to change the titles use the following code in ViewPagerAdapter

@Override
public CharSequence getPageTitle(int position) {
    switch (position){
        case 0:
            return "Title 1";
        case 1:
            return "Title 2";
        case 2:
            return "Title 3";
    }
    return super.getPageTitle(position);
}