[androidbrasil-dev] Problema com intent ao chamar activity

@Override

protected boolean onTap(int index) {

System.out.println(index);

  OverlayItem item = mOverlays.get(index);

  AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);

  dialog.setTitle(item.getTitle());

  dialog.setMessage(item.getSnippet());

  dialog.setIcon(R.drawable.ic_mapa_bar);

  dialog.setNegativeButton("Fechar", null);

  dialog.setNeutralButton("Mais detalhes", new DialogInterface.OnClickListener() {

  public void onClick(DialogInterface dialog, int id) {

    Intent myIntent = new Intent( mContext, DetalhesActivity.class);

startActivity(myIntent);

    System.out.println("selecionou bar");

    }

       });

   dialog.show();

  return true;

}