How to go other Tabs by clicking on a Button from the current Tab in Android?

Question

I trying to write a code in Android, to switch from one tab to another tab by click on a button.

I know to by clicking on tab we can switch from one tab to another but c

Answer 1

your ViewPager is null because you are not initializing the variable.

You need do

public class MoviesFragment extends Fragment {

ViewPager viewPager;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle    savedInstanceState) 
{

   View rootView = inflater.inflate(R.layout.fragment_movies, container, false);

   Button btn = (Button) rootView.findViewById(R.id.btn);
   viewPager = (ViewPager) rootView.findViewById(R.id.some_viewpager);//Initializing
   btn.setOnClickListener(new View.OnClickListener() 
   {

       @Override
      public void onClick(View v) 
      {

          viewPager.setCurrentItem(0);

      }
  }); 


 return rootView;
}}