title: Back button not working after displaying Contact
body: <p>I am playing with the "Clickable List Items" code from Pro Android 4. The code is basically:</p>
  
  <pre><code>public class MainActivity extends ListActivity implements OnItemClickListener
  {
      @Override
      public void onCreate(Bundle savedInstanceState)
      {
          super.onCreate(savedInstanceState);
  
          CursorLoader loader = new CursorLoader(this, Contacts.CONTENT_URI, null,
              null, null, Contacts.DISPLAY_NAME + " ASC");
          Cursor cursor = loader.loadInBackground();
  
          String[] columns = new String[] { Contacts.DISPLAY_NAME };
          int[] views = new int[] { android.R.id.text1 };
  
          SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
              android.R.layout.simple_list_item_1, cursor, columns, views, 
                  CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
          setListAdapter(adapter);
  
          getListView().setOnItemClickListener(this);
      }
  
      @Override
      public void onItemClick(AdapterView&lt;?&gt; adapterView, View view, int position, long id)
      {
          Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, id);
          Intent intent = new Intent(Intent.ACTION_VIEW, contactUri);
          startActivity(intent);
      }
  }
  </code></pre>
  
  <p>This all works fine. I see the list of contacts and when I tap a name it opens the address book for that person.</p>
  
  <p>The problem is that the Back button does not work from the address book. According to the book , tapping the back button from the address book should bring me back to the above Activity. But instead I am taken back to the home screen.</p>
  
  <p>My app is still running, when I switch to it manually I get back to it and the list view is at the proper previous scroll position, etc.</p>
  
  <p>This is on Android 4.1.1. I'm wondering if there is something extra I should implement to make this work?</p>
  
  <p>This is the Manifest file:</p>
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example.contactslist"
      android:versionCode="1"
      android:versionName="1.0" &gt;
  
      &lt;uses-sdk
          android:minSdkVersion="16"
          android:targetSdkVersion="15" /&gt;
  
      &lt;uses-permission android:name="android.permission.READ_CONTACTS"/&gt;
  
      &lt;application
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme" &gt;
          &lt;activity
              android:name=".MainActivity"
              android:label="@string/title_activity_main" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
  
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>