Using intent to call a fragment from another fragment

You can't call your Fragment like this,

  Intent intent = new Intent(view.getContext(), FragmentGreen.class);
  view.getContext().startActivity(intent);
  getActivity().finish();

you need to call your fragment like this way

    FragmentManager fm = getFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();
    FragmentGreen llf = new FragmentGreen();
    ft.replace(R.id.listFragment, llf);
    ft.commit();

Intent is basically used for call one activity from another. For add new Fragment you can't use Intent. For that you have to use FragmentManager and for open fragment FragmentTransaction.

for more details go Here

If all the fragments are within the same ViewPager and you just want to be navigated to that fragment then you dont need any Intents. all you need to is :

mViewPager.setCurrentItem(POSITION, true);

here POSITION is an integer.

Now the view pager is in Activity but the Button is inside Fragment so you need to do this create this method inside your activity

public void selectFragment(int position){
mViewPager.setCurrentItem(position, true); 
// true is to animate the transaction
}

and call like this inside your OnClickListener:

((MainActivity)getActivity()).selectFragment(POSITION_YOU_WANNA_SELECT);

Hope it helps.