title: AutoCompleteTextView doesn't update arrayadapter items
body: <p>The following App flow shows what I expected ("Alfa" in the autocomplete list):  </p>
  
  <p>Open App -> click on button -> tap on autocomplete field -> type "al"  </p>
  
  <p>But this one fails (and if I type "br", "Bravo" is still in the list):  </p>
  
  <p>Open App -> tap on autocomplete field -> type anything and then delete it -> click on button -> tap on autocomplete field -> type "al"  </p>
  
  <p>Why the list is not updated in the second sequence?  </p>
  
  <pre><code>public class DisplayFragment extends Fragment {
  
   AutoCompleteTextView autoCTVShop;
   Button buttonSend;
  
   String[] names= {"Bravo","Charlie","Delta","Foxtrot"};
   ArrayAdapter&lt;String&gt; adapter;
  
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {            
      return inflater.inflate(R.layout.fragment_display, container, false);
   }
  
   @Override
   public void onActivityCreated(Bundle savedInstanceState) {
      super.onActivityCreated(savedInstanceState);
  
      autoCTVShop = (AutoCompleteTextView) getActivity().findViewById(R.id.autoCompleteTextViewShop);
      adapter = new ArrayAdapter&lt;String&gt;(getActivity().getApplicationContext(),
              android.R.layout.simple_list_item_1, names);
      autoCTVShop.setAdapter(adapter);
      buttonSend = (Button) getActivity().findViewById(R.id.buttonSend);
      buttonSend.setOnClickListener(new View.OnClickListener() {  
  
          @Override
          public void onClick(View v) {
              //The following two lines don't work as I expected
              names[0]="Alfa";
              adapter.notifyDataSetChanged();
          }
      }); 
   }
  
  
   @Override
   public void onSaveInstanceState(Bundle outState) {
      super.onSaveInstanceState(outState);
   }
  }  
  </code></pre>
  
  <p>fragment_display.xml:  </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" &gt;
  
  &lt;AutoCompleteTextView
      android:id="@+id/autoCompleteTextViewShop"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:ems="10"
      android:imeOptions="actionNext"
      android:singleLine="true" /&gt;
  
  &lt;Button
      android:id="@+id/buttonSend"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:clickable="true"
      android:enabled="true"
      android:text="Button" /&gt;
  
  &lt;/LinearLayout&gt;  
  </code></pre>
  
  <p>Thanks.</p>