android.support.design.widget.TabLayout select Tab Programmatically

Question

I am using android.support.design.widget.TabLayout. It has two tabs, If user selects second tab On particular condition I want user to redirect to first tab and disallow him to go to sencond tab until condition matches. To achieve this I tried,

tabLayout.getTabAt(0).select(); 

but it does not reselect first tab

Milanmilanese

Rather than allowing them to navigate and then having to redirect them, it may be easier to disable tab selection until the criteria are met: #4497687 – Gisela

@QuintinBalsdon , thanks, But example in your link is related to TabHost.It has setEnable() methode in tabhost.getTabwidget. I am using new TabLayout in support library. – Milanmilanese

Answer 1

This is because that view is still not initialized properly, and you are trying to perform some action.

As a solution you just need to put one hadler before selecting perticular tab.

new Handler().postDelayed(
    new Runnable(){
        @Override
        public void run() {
            tabLayout.getTabAt(yourTabIndex).select();
        }
}, 100);

Hooghly

is there any possibility to listen for an event (i.e. onCreationComplete) .. so that implement an event based solution, instead of using hard coded timer? – Islamism

I guess there is no such method for that. – Hooghly

I think I solved it without the hardcoded timer, see my answer – Oidea

Answer 2

This is how I solved it:

tabLayout.getTabAt(CurrentItem).getCustomView().setSelected(true);

Feodora

Answer 3

This worked for me:

int tabIndex = 2;
tabLayout.setScrollPosition(tabIndex,0f,true);
viewPager.setCurrentItem(tabIndex);

Velazquez

Answer 4

You can select the tab in Fragment.onViewCreated().

Hyacinthie

Answer 5

This is my setup. works fine for me.

      //declare your tabs to be add on
        TabLayout tlDailyView;
        private TabLayout.Tab tabAppointment, tabSlots;


    @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.fragment_daily_view, container, false);
            initializeMembers();
            setupTabLayout();
            return view;
        }


    private void setupTabLayout() {
            tlDailyView.addTab(tabAppointment, 0, true);
            tlDailyView.addTab(tabSlots, 1, true);
            tlDailyView.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
                @Override
                public void onTabSelected(TabLayout.Tab tab) {

                    switch (tab.getPosition()) {
                        case 0:
                        //open fragment at position 0 here
                        case 1:
                        //open fragment at position 1 here
                            break;
                    }

                }

                @Override
                public void onTabUnselected(TabLayout.Tab tab) {

                }

                @Override
                public void onTabReselected(TabLayout.Tab tab) {

                }
            });
        }

 private void initializeMembers() {
        tabSlots = tlDailyView.newTab();
        tabAppointment = tlDailyView.newTab();
        tabAppointment.setText(R.string.tab_appts).select();
        tabSlots.setText(R.string.tab_slots);
    }

don't forget to initialize your tab layout above.

Morass

Answer 6

tabLayout.getTabAt(index specific).select();

Femmine

Answer 7

It's too late but it might help other developers.

If you go inside and see how tabLayout.getTabAt(tabIndex).select(); has been implemented inside. You'll come to know that, it sends your flow to

onTabReselected(tab: TabLayout.Tab?)

and your flow doesn't go to

onTabSelected(tab: TabLayout.Tab?)

if your current tab and tabIndex are same. So this is very important to consider.

Nodab

Answer 8

Mihir's answer gave me an idea to try this. Seems like it works without the hardcoded timer, and also correctly updates the scroll for selected tab:

final TabLayout tabLayout = ...;
tabLayout.postOnAnimation(new Runnable() {
    @Override
    public void run() {
        tabLayout.getTabAt(2).select();
    }
});

Oidea