Flutter : Listview Builder - Text

Question

Good afternoon, you guys!

Could you help me with a question?

What am I doing:

• I created a Listview. inside my body. As you can see I am passing an itemCount: data.length, because I created a List Dice that gathers all other Lists the return of my data[index] is:

    [Infracao{id: 20, conteudo: DIRIGIR veículo SEM possuir CNH}]
    [Anexo{id: 40, nome: GESTOS DE AGENTES, conteudo: movimentos convencionais de braço, adotados exclusivamente pelos agentes de autoridades de trânsito nas vias, para orientar, indicar o direi
  
    [Fiscalizacao{id: 40, nome: VIADUTO,}]
  

And how I’m doing and my doubt

As you can see I need to compare if (dados[index] is Infracao) return ListaInfracao(dados[index] as Infracao); and so to others or be it returns me to LIST But beyond the list I’d like him to bring a Pedding calling a Text("Infringements") below returns the list and so on to the others.

Because of the way it is just giving a Return in the list and before giving the Return in the list I would like to return tmb a TEXT, below is picture of how it is currently as I would like it to be.

    body: Column(
      children: <Widget>[
        Expanded(
          child: ListView.builder(
            padding: EdgeInsets.all(10.0),
            itemCount: dados.length,
            itemBuilder: (BuildContext context, int index) {
              if (dados[index] is Infracao) 
                //AQUI RETORNARIA UM PEDDING TEXT();
                //DEPOIS A LISTA
                return ListaInfracao(dados[index] as Infracao);
              if (dados[index] is Anexo)
                return ListaAnexos(dados[index] as Anexo);
              else 
                return ListaFiscalizacao(dados[index] as Fiscalizacao);
            },
          ),
        ),
      ],
    ));

HOW YOU ARE CURRENTLY BRINGING THE LIST OF INFRINGEMENTS AND ATTACHMENTS TO PRINT

HOW I WISH YOU WOULD RETURN

Answer 1

it is important that you know how to formulate your question, so that it is easy to understand what your need is, anyway let’s see if this can help you:

if (dados[index] is Infracao) 
   //AQUI RETORNARIA UM PEDDING TEXT();
   //DEPOIS A LISTA
   return ListaInfracao(dados[index] as Infracao);

If I understand your question correctly, Widget be it Infracao you need to return a widget ListaInfracao with a certain padding? If this the case you can accomplish this in several modes:

The simplest way would be to ultimate a Padding:

Then your Return would be:

return Padding(
   padding: const EdgeInsets.only(top: ALTURA_DESEJADA),
   child: ListaInfracao(dados[index] as Infracao);
);

Or you create your list in to a Container:

return Container(
   padding: const EdgeInsets.only(top: ALTURA_DESEJADA),
   child: ListaInfracao(dados[index] as Infracao);
);

Better organize your code, you are creating 3 different lists between them, within a List, so you can practically have 3 Listviews within a 1 Listview, why not create directly the Listviews you need? If all Listviews are similar (at least from the image it seems so), why not create a single widget, which gets its Energy list and creates the view?