gistfile1.txt

  _buildFriendsList() {
    return Observer(
      builder: (_) {
        if (_grupoController.processingFriends == true) {
          return Center(
              child: Container(
            child: CircularProgressIndicator(),
          ));
        } else if (_grupoController.errorMessage.isNotEmpty) {
          return Center(
            child: Text(_grupoController.errorMessage),
          );
        } else {
          return Container(
            child: RefreshIndicator(
              onRefresh: _reloadData,
              child: ListView.builder(
                  shrinkWrap: true,
                  controller: _scrollControllerFriends,
                  itemCount: _grupoController.friends.length,
                  itemBuilder: (BuildContext context, int index) {
                    List<UsuarioModel> itens = _grupoController.friends;
                    UsuarioModel _friend = itens[index];
                    return Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: InkWell(
                        onTap: () {},
                        child: _buildCardUserItem(_friend),
                      ),
                    );
                  }),
            ),
          );
        }
      },
    );
  }
  
  Future<void> _reloadData() async {
    await Future.delayed(Duration(seconds: 2), () {
      // Carregando os dados do amigos
      _grupoController.fetchFriends(
          _grupoController.model.id, _usuarioController.model.token);
    });
  }