How to switch tabs from a fragment using a button?

Question

I have a tabbed Activity with several tab Fragments. (like artists, playlists, albums). I want to add a buttons to my home Fragment that will navigate to the other tabs after being click. For example: i click on playlists and it takes me 3 tabs over to playlists. I have no Idea how to go about this.

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(
            R.layout.fragment_home, container, false);
    playlists = (Button) rootView.findViewById(R.id.playlists);
    playlists.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //getActivity().getTabHost().setCurrentTabByTag("TAB2");
            //viewPager.setCurrentItem(2);


        }
    });


    return rootView;
}

Answer 1

Declare an interface in HomeFragment and declare listener variable

private HomeFragmentActionListener mListener;

    public interface HomeFragmentActionListener { 
            void onButtonClick(int pos);
        }

set this listener variable in HomeFragment class.

public void setListener(
            HomeFragmentActionListener listener) {
        mListener = listener;
    }

and onButton click inform the listener

playlists.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //getActivity().getTabHost().setCurrentTabByTag("TAB2");
            //viewPager.setCurrentItem(2);
          mListener.onButtonClick(2);
        }
    });

Implement this interface under MainFragment

public class MainFragment extends Fragment {

 private class HomeFragmentListener implements HomeFragment.HomeFragmentActionListener {
public void onButtonClick(int pos) {
 //Change the tabs.
}
}
and set the listener in setupviewpager
private void setupViewPager(ViewPager viewPager) { 
Adapter adapter = new Adapter(getChildFragmentManager()); 
HomeFragment homeFragment = new HomeFragment(); 
homeFragment.setListener( new HomeFragmentListener()); 
adapter.addFragment(homeFragment, this.getString(R.string.Homecap)); 
..