recyclerview set layout manager from java code example

Example 1: how to change tablayout current view position in android

void selectPage(int pageIndex){
    tabLayout.setScrollPosition(pageIndex,0f,true);
    viewPager.setCurrentItem(pageIndex);
}

Example 2: fragment manager in android

Intent intent = new Intent(v.getContext(), Addbill.class);
        v.getContext().startActivity(intent);
        getActivity().finish();