title: Butter Knife @bind in Fragment error
body: <p>I follow the instructions on the website : <a href="http://jakewharton.github.io/butterknife/" rel="noreferrer">http://jakewharton.github.io/butterknife/</a></p>
  
  <p>error : java.lang.RuntimeException: Unable to start activity ComponentInfo. java.lang.RuntimeException: Unable to bind views for com.project.myapp.OneFragment.</p>
  
  <p>I try to remove <code>@Bind(R.id.btnNext) Button btnNext;</code> and run no error. </p>
  
  <pre><code>public class OneFragment extends Fragment {
      @Bind(R.id.btnNext) Button btnNext;
  
      private static final String ARG_PARAM1 = "param1";
      private static final String ARG_PARAM2 = "param2";
  
      private String mParam1;
      private String mParam2;
  
      private OnFragmentInteractionListener mListener;
  
      public OneFragment() {
          // Required empty public constructor
      }
      public static OneFragment newInstance(String param1, String param2) {
          OneFragment fragment = new OneFragment();
          Bundle args = new Bundle();
          args.putString(ARG_PARAM1, param1);
          args.putString(ARG_PARAM2, param2);
          fragment.setArguments(args);
          return fragment;
      }
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          if (getArguments() != null) {
              mParam1 = getArguments().getString(ARG_PARAM1);
              mParam2 = getArguments().getString(ARG_PARAM2);
          }
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
                               Bundle savedInstanceState) {
          View view = inflater.inflate(R.layout.fragment_one, container, false);
          ButterKnife.bind(this, view);
  
          return view;
      }
      public void onButtonPressed(Uri uri) {
          if (mListener != null) {
              mListener.onFragmentInteraction(uri);
          }
      }
      @Override
      public void onAttach(Context context) {
          super.onAttach(context);
          if (context instanceof OnFragmentInteractionListener) {
              mListener = (OnFragmentInteractionListener) context;
          } else {
              throw new RuntimeException(context.toString()
                      + " must implement OnFragmentInteractionListener");
          }
      }
  
      @Override
      public void onDetach() {
          super.onDetach();
          mListener = null;
      }
      public interface OnFragmentInteractionListener {
          void onFragmentInteraction(Uri uri);
      }
  }
  </code></pre>