Dynamic TextField ListView

Dynamic TextField ListView

main.dart

import 'package:dynamicinputfield/problem.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
            primarySwatch: Colors.blue,
            visualDensity: VisualDensity.adaptivePlatformDensity),
        home: MyHomePage());
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<Problem> problemList = List();
  final List<TextEditingController> _controllers = List();

  @override
  void initState() {
    super.initState();

    problemList.add(Problem(id: '1', problemName: 'Display'));
    problemList.add(Problem(id: '2', problemName: 'Bluetooth'));
    problemList.add(Problem(id: '3', problemName: 'Speaker'));
    problemList.add(Problem(id: '4', problemName: 'PCB'));
    problemList.add(Problem(id: '5', problemName: 'Camera'));
    problemList.add(Problem(id: '6', problemName: 'Glass'));
    problemList.add(Problem(id: '7', problemName: 'Press button'));
    problemList.add(Problem(id: '8', problemName: 'Charging'));
    problemList.add(Problem(id: '9', problemName: 'Battery'));
    problemList.add(Problem(id: '10', problemName: 'Storage'));
    problemList.add(Problem(id: '11', problemName: 'Overheating'));
    problemList.add(Problem(id: '12', problemName: 'Restart Problem'));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text('ListView Dynamic Create TextField')),
        body: _bodyList(problemList));
  }

  _bodyList(List<Problem> problemList) => ListView.builder(
      physics: const BouncingScrollPhysics(),
      itemCount: problemList.length,
      shrinkWrap: true,
      itemBuilder: (BuildContext context, int index) {
        _controllers.add(new TextEditingController());
        _controllers[index].text = problemList[index].enterValue;

        return Container(
            padding: EdgeInsets.only(top: 0, right: 10, left: 10),
            child: Row(children: <Widget>[
              expandStyle(
                  2,
                  Container(
                      margin: EdgeInsets.only(top: 35),
                      child: Text(problemList[index].problemName))),
              expandStyle(
                  1,
                  TextFormField(
                      controller: TextEditingController.fromValue(
                          TextEditingValue(
                              text: problemList[index].enterValue,
                              selection: new TextSelection.collapsed(
                                  offset:
                                      problemList[index].enterValue.length))),
                      keyboardType: TextInputType.number,
                      onChanged: (String str) {
                        problemList[index].enterValue = str;
                        var total = problemList.fold(
                            0,
                            (t, e) =>
                                t +
                                double.parse(
                                    e.enterValue.isEmpty ? '0' : e.enterValue));
                        print(total);
                      }))
            ]));
      });
}

expandStyle(int flex, Widget child) => Expanded(flex: flex, child: child);

problem.dart

class Problem {
  String id;
  String problemName;

  String enterValue;

  Problem({this.id, this.problemName, this.enterValue = ''});

  Problem.fromJson(Map<String, dynamic> json) {
    id = json['ID'];
    problemName = json['DISPNAME'];
  }

  Problem copyWith({double enterValue}) {
    return Problem(
      enterValue: enterValue ?? this.enterValue,
    );
  }
}

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