How to change background color of Tablayout from a fragment?

Question

I have created a tablayout in MainActivity and bunch of fragments using viewpager. I want to change the color of tablayout when I click a button present in fragment. So how do I refer to tablayout created in MainActivity so that I can change it's color in respective fragments?

Answer 1

You can change background color of tablayout using addOnTabSelectedListener of tablyout according to position of tabs, like below code:

     tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
                @Override
                public void onTabSelected(TabLayout.Tab tab) {
                    viewPager.setCurrentItem(tab.getPosition());
                    switch (tab.getPosition()){
// Change color of tab layout according to tab position
 
                        case 0:
                            tabLayout.setBackgroundColor(getResources().getColor(R.color.black));
                            break;
                        case 1:
                            tabLayout.setBackgroundColor(getResources().getColor(R.color.teal_200));
                            break;
                        default:
                            tabLayout.setBackgroundColor(getResources().getColor(R.color.black));
                            break;
    
                    }
                }
    
                @Override
                public void onTabUnselected(TabLayout.Tab tab) {
    
                }
    
                @Override
                public void onTabReselected(TabLayout.Tab tab) {
    
                }
            });