title: fragment doesnt show the layout
body: <p>i have a <strong>fragment</strong> like this :  </p>
  
  <pre><code>public class ContactFragment extends Fragment {
  
          @Override
          public void onAttach(Activity activity) {
              super.onAttach(activity);
  
          }
  
          @Override
          public void onDetach() {
              super.onDetach();
          }
          @Override
          public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
              inflater.inflate(R.layout.contacts_picker_activity, null);
  
              return super.onCreateView(inflater, container, savedInstanceState);
          }
          @Override
          public void onViewCreated(View view, Bundle savedInstanceState) {
  
              super.onViewCreated(view, savedInstanceState);
          }
      }
  </code></pre>
  
  <p>and <strong>contacts_picker_activity</strong> layout :  </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="match_parent"
      android:layout_height="match_parent" &gt;
      &lt;TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="this a test "
              android:id="@+id/textView" android:layout_gravity="center"/&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>the problem is when i run my app, <strong>onCreateView</strong> method run but didnt show the layout.<br>
  i dont have any error in my logcat. </p>