title: SupportMapFragment not working , gives error
body: <p>when i open application first time , it shows map correctly . But when second time i open application it crash always . </p>
  
  <pre><code>@Override
  public void onActivityCreated(Bundle savedInstanceState) {
      // TODO Auto-generated method stub
      super.onActivityCreated(savedInstanceState);
  
      FragmentManager fm = getChildFragmentManager();
      supportMapFragment = (SupportMapFragment)fm.findFragmentById(R.id.doctordetail_map);
  
  }
  </code></pre>