How to set selected tab job in on create

Question

I have 3 tabs containing difference Fragments as:

Product and Services
Business Directory
Job

Bellow is my TabFragement Adapter The code is worked correctly but only 1 thing I want is: => I want to set Job Fragment as default in onCreate

This is my adapter.

public class TabFragment extends Fragment {
    public static TabLayout tabLayout;
    public static ViewPager viewPager;
    public static int int_items = 3 ;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View x =  inflater.inflate(R.layout.tab_layout,null);
        tabLayout = (TabLayout) x.findViewById(R.id.tabs);
        viewPager = (ViewPager) x.findViewById(R.id.viewpager);

        viewPager.setAdapter(new MyAdapter(getChildFragmentManager()));

        tabLayout.post(new Runnable() {
            @Override
            public void run() {
                tabLayout.setupWithViewPager(viewPager);
            }
        });

        return x;

    }

    class MyAdapter extends FragmentPagerAdapter{

        public MyAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position)
        {
            switch (position){
                case 0 : return new Product_Service();
                case 1 : return new Business_Dir();
                case 2 : return new Job();
            }
            return null;
        }

        @Override
        public int getCount() {

            return int_items;
        }

        @Override
        public CharSequence getPageTitle(int position) {

            switch (position){
                case 0 :
                    return "Product & Srevices";
                case 1 :
                    return "Business Directory";
                case 2 :
                    return "Job";
            }
            return null;
        }
    }
}

you want to show the 3rd fragment on the top – Pavneet_Singh Sep 19 '16 at 06:30 — Pavneet_Singh, Sep 19 '16 at 06:30
use setCurrentTab(3) to show selected fragment Job – PriyankaChauhan Sep 19 '16 at 06:33 — PriyankaChauhan, Sep 19 '16 at 06:33
yes when I start the activity it display 3rd selected – Preap San Sep 19 '16 at 06:34 — Preap San, Sep 19 '16 at 06:34

Pavneet_Singh · Answer 1 · 2016-09-19T06:56:23.497

3

You can use the fragment position index to show particular fragment as default using setCurrentItem method ofViewPager docs. Do this after setting adapter on viewpager

viewPager.setCurrentItem(2, false); // job fragment index is 2

false here mean , the transition to fragment 3 will be done instantly and if you pass true then chosen fragment will be displayed using scrolling effects ( you can use true when you want to give a little tour to user for first time)

edited Sep 19 '16 at 06:56

answered Sep 19 '16 at 06:33

Pavneet_Singh

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Thanks Pavneet Singh, Your answer are work, but when I try to use it in main activity it geting error, HERE IS MY CODE `mFragmentManager = getSupportFragmentManager(); mFragmentTransaction = mFragmentManager.beginTransaction(); mFragmentTransaction.replace(R.id.containerView,new TabFragment()).commit();TabFragment.viewPager.setCurrentItem(2, false); // job fragment index is 2` – Preap San Sep 19 '16 at 06:49
you can update your question with code of `mainactivity` plus add the logcat error too – Pavneet_Singh Sep 19 '16 at 06:58
seems like error is `TabFragment.viewPager.setCurrentItem‌(2, false)` you are doing this too early i.e. your fragment and tab is not ready to use ,so put this line after this `tabLayout.setupWithViewPage` – Pavneet_Singh Sep 19 '16 at 07:05

How to set selected tab job in on create

1 Answers1