title: getAdapterPosition() not returning position of item in RecyclerView
body: <p>This is a sort of follow-up or complement to <a href="https://stackoverflow.com/questions/30723753/clicking-cardview-to-load-a-fragment">this post</a>. I am trying to get the position of an item in my RecyclerView, but none of the methods I have tried have worked.</p>
  
  <p>I called <code>getAdapterPosition()</code> in my <code>PersonViewHolder</code> constructor and assigned its value to the integer position, which is used in the <code>UnitOneFragment</code> class to do something accordingly (see <code>onClick()</code> method). But whatever that something is, it doesn't happen and my guess is because the <code>getAdapterPosition()</code> method doesn't work or isn't used correctly.</p>
  
  <p>My adapter:</p>
  
  <pre><code>public class RVAdapter extends RecyclerView.Adapter&lt;RVAdapter.PersonViewHolder&gt; {
  
  Context mContext;
  
  RVAdapter(Context context, List&lt;Chapter&gt; chapters) {
      mContext = context;
      this.chapters = chapters;
  }
  
  public static CardView cv;
  public static int position;
  public static String chapterNumberTitle;
  
  public class PersonViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
      TextView chapterName;
      TextView chapterNumber;
      // ImageView chapterPhoto;
  
      public PersonViewHolder(View itemView) {
          super(itemView);
  
          cv = (CardView) itemView.findViewById(R.id.cv);
          chapterName = (TextView) itemView.findViewById(R.id.chapter_name);
          chapterNumber = (TextView) itemView.findViewById(R.id.chapter_number);
          // chapterPhoto = (ImageView) itemView.findViewById(R.id.person_photo);
  
          chapterNumberTitle = chapterNumber.getText().toString();
          position = getAdapterPosition();
  
          itemView.setOnClickListener(this);
      }
  
      @Override
      public void onClick(View v) {
          UnitOneFragment.chapterChecker();
  
          Intent intent = new Intent(mContext, ChapterActivity.class);
          mContext.startActivity(intent);
      }
  }
  
  List&lt;Chapter&gt; chapters;
  
  @Override
  public void onAttachedToRecyclerView(RecyclerView recyclerView) {
      super.onAttachedToRecyclerView(recyclerView);
  }
  
  @Override
  public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
      View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item, viewGroup, false);
      PersonViewHolder pvh = new PersonViewHolder(v);
      return pvh;
  }
  
  @Override
  public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
      personViewHolder.chapterName.setText(chapters.get(i).chapterName);
      personViewHolder.chapterNumber.setText(chapters.get(i).chapterNumber);
      // personViewHolder.chapterPhoto.setImageResource(persons.get(i).photoId);
  
  }
  
  @Override
  public int getItemCount() {
      return chapters.size();
      }
  }
  </code></pre>
  
  <p>The other class:</p>
  
  <pre><code>public class UnitOneFragment extends android.support.v4.app.Fragment {
  
  private List&lt;Chapter&gt; chapters;
  private RecyclerView rv;
  private RecyclerView.LayoutManager llm;
  
  public UnitOneFragment() {
      // Required empty public constructor
  }
  
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
                           Bundle savedInstanceState) {
      // Inflate the layout for this fragment
      View v = inflater.inflate(R.layout.fragment_unit_one, container, false);
  
      getActivity().setTitle("Unit One");
  
      rv = (RecyclerView) v.findViewById(R.id.rv);
      rv.setHasFixedSize(true);
  
      llm = new LinearLayoutManager(getActivity());
      rv.setLayoutManager(llm);
  
      initializeData();
      initializeAdapter();
  
      return v;
  }
  
  private void initializeData() {
      chapters = new ArrayList&lt;&gt;();
      chapters.add(new Chapter("Human Prehistory to the Early Civilizations", "Chapter One"));
      chapters.add(new Chapter("Classical China", "Chapter Two"));
      chapters.add(new Chapter("Classical India", "Chapter Three"));
      chapters.add(new Chapter("Classical Greece and Rome", "Chapter Four"));
      chapters.add(new Chapter("Classical Period: Declines and Diversities", "Chapter Five"));
  }
  
  private void initializeAdapter() {
      RVAdapter adapter = new RVAdapter(getActivity(), chapters);
      rv.setAdapter(adapter);
  }
  
  public static void chapterChecker() {
  
      if (RVAdapter.position == 0) {
          SummaryFragment.summaryText.setText("Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of \"de Finibus Bonorum et Malorum\" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, \"Lorem ipsum dolor sit amet..\", comes from a line in section 1.10.32.");
          }
      }
  }
  
  class Chapter {
  String chapterName;
  String chapterNumber;
  // int photoId;
  
  Chapter(String chaptername, String chapternumber) {
      this.chapterName = chaptername;
      this.chapterNumber = chapternumber;
      // this.photoId = photoId;
      }
  }
  </code></pre>
  
  <p>My code seems pretty self-explanatory but if there's anything confusing, please let me know and I will add more information. Once again, the problem is that I can't get the position of the item in the RecyclerView and then act on it.</p>