How to customize individual tabs? (changing background color, indicator color and text color)

Question

In this link : How do I apply a style programmatically?

Kevin Grant gave a explaination to this question my problem with his code is the context part. To be precise

Answer 1

if another one using TabLayout as in my case i used this snippet

tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            tab.setCustomView(R.layout.chat_tab);

        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
            tab.setCustomView(null);
        }

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

        }
    });