Demo listview

main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyHomePage(),
        ),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {


  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  List<String> listaUsers = [];
  TextEditingController addColaborador = new TextEditingController();
  @override
  Widget build(BuildContext context) {
    final body = ListView(
        scrollDirection: Axis.vertical,
        shrinkWrap: true,
        children: List.generate(listaUsers.length, (index) {
          Widget child = ListTile(
              dense: true,
              title: Row(
                children: <Widget>[
                  Text(
                    listaUsers[index], //.id.toString(),
                    style: TextStyle(color: Colors.black, fontSize: 13),
                  ),
                  Text(" - "),
                  Text(
                    "", //listaUsers[index].name,
                    style: TextStyle(color: Colors.black, fontSize: 13),
                  ),
                ],
              ),
              onTap: () {}, //=> _onTapped(user),
              trailing: IconButton(
                icon: Icon(Icons.remove),
                onPressed: () {
                  setState(() {
                    listaUsers.removeAt(index);
                  });
                },
              ));

          return child;
        }).toList()
          ..add(Padding(
              padding: EdgeInsets.only(left: 10),
              child: Container(
                  padding: EdgeInsets.only(left: 15, right: 15),
                  child: Row(children: <Widget>[
                    Expanded(
                      child: TextField(
                        controller: addColaborador,
                        decoration: InputDecoration(
                            hintText: "ID COLABORADOR",
                            contentPadding: EdgeInsets.only(bottom: 0),
                            labelStyle: TextStyle(color: Colors.blueAccent)),
                      ),
                    ),
                    IconButton(
                      icon: Icon(Icons.add),
                      onPressed: () {
                        //_buscarId();
                        setState(() {
                          listaUsers.add(addColaborador.text);
                          addColaborador.clear();
                        });
                      },
                    )
                  ])))));

    return Scaffold(
      appBar: AppBar(
        title: Text('Test'),
      ),
      body: body,
    );
  
  }
}