title: Get list of contacts belonging to a specific group
body: <p>Does anybody know how to get a list of contacts belonging to a 1 specific group in Android?</p>
  
  <p>I need something like this:</p>
  
  <pre><code>Select * from contacts where group_id = "1234"
  </code></pre>
  
  <p>I am able to get a list of all contacts OR all groups by using something like this:</p>
  
  <pre><code>Cursor groupCursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
  final ArrayList&lt;String&gt; contacts = new ArrayList&lt;String&gt;();
  
  while(groupCursor.moveToNext()) {
      String name = groupCursor.getString(groupCursor.getColumnIndex(ContactsContract.Constacts.DisplayName    ));
      contacts.add(name);
  }
  </code></pre>